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MSS SP-96-2001
Guidelines on
Terminology for
Valves and Fittings
Standard Practice Developed and Approved by the Manufacturers
Standardization Society of the Valve and Fittings Industry,
Inc.
Vienna, Virginia 22180 127 Park Street, NE
(703) 281 -661 3
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MSS STANDARD PRACTICE SP-96
This MSS Standard Practice was developed under the consensus of
the MSS Technical Committee 302 and the MSS Coordinating Commitee.
The content of this Standard Practice is the result of the efforts
of competent and concerned volunteers to provide an effective,
clear, and nonexclusive specification that will benefit the
industry as a whole. This MSS Standad Practice is intended as a
basis for common practice by the manufacturer, the user, and the
general public. The existence of an MSS Standard Practice does not
in itself preclude the manufacture, sale, or use of products not
conforming to the Standard Practice. Mandatory conformance is
established only by reference in a code, specification, sales
contract, or public law, as applicable.
This document has been substantially revised from the previous
1996 edition. It is suggested that if the user is interested in
knowing what changes have been made, that direct page-by-page
comparison should be made of this document with the previous
edition
Any part of this standard may be quoted. Credit lines should
read Extracted JLom MSS SP-96, 2001, with permission of the
publisher, the Manufacturers Standardization Society. Reproduction
prohibited under copyright convention unless written permission is
granted by the Manufacturers Standardization Society of @ the Valve
Fittings Industry, Inc.
OnginaUy Approved September 1986
Copyright w, 1986 by Manufacturen Standardization Society
of the Valve and Fittings Industry, inc.
Printed in U.S.A.
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MSS STANDARD PRACTICE SP-96
FOREWORD
Valves and fittings were being manufactured in the United States
for many years before the first standards were written. In
selecting names for these products and their component parts,
manufacturers chose terms which seemed appropriate to the
configuration and intended use.
Uses expanded and changed, and manufacturers sometimes found
that logical choices of terminology had been preempted by other
products. The result has been that valves, fittings, and parts of
similar configuraton or intended use sometimes have more than one
name. in other cases, the same name has been apphed to assembiies
or parts of different configuration and function.
The absence of a common statement of preferred terms has
contributed to the variations of terms used by individual
manufacturers.
This Standard Practice has been developed to serve two
functions:
1) To assist the users of valves and fittings in communicating
with their manufacturers.
2) To promote standardization in the usage of terms in
industry.
The Standard Practice provides definitions of the preferred
items, and provides cross referencing to the appropriate preferred
terms for other commonly used terms. It is subject to the periodic
review procedure common to standards.
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MSS STANDARD PRACTICE SP-96
CONTENTS
SECTION PAGE
1 . SCOPE
.....................................................................................................................
1 2 . DOCUMENT SOURCES
...............................................................................................
1 3 . GLOSSARY
..............................................................................................................
3 4 . ABBREVIATIONS
...................................................................................................
25
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MSS STANDARD PRACTICE SP-96
GUIDELINES ON TERMINOLOGY FOR
1. SCOPE
VALVES AND FITTINGS
AFS
1.1 This Standard Practice lists and defines principle terms and
acronyms widely used to describe general purpose valves and
fittings. It is comprised of separate sections which contain:
Acronyms for organizations whose documents are applicable to
valves and fittings and a brief summary of the applicable area of
interest.
A glossary of terms used in valve and fittings specifications to
describe design, operation, and performance characteristics.
Abbreviations commonly used in the valve and fittings
industry.
2. DOCUMENT SOURCES
A number of technical societies, trade associa- tions, and
governmental agencies in the United States of America promulgate
codes, standards, or specifications that are pertinent to valves
and fittings. Some are recognized throughout the valve and fittings
indusy, some are relevant to specific services, while others are
applicable to all usages within a specific industry. Most of these
organizations and their standards or specifications are designated
by letters. The organizations most fiequently referenced and their
relationship to the valve and fittings industry are listed
below:
AAR
AC1
ABS
Association of American Railroads - publishes design and
dimensional standards for bronze valves and 300 psi pressure
rating, malleable pipe- fittings used by railroads. Alloy Castings
Institute - publishes material specifications for heat and
corrosion resistant alloys. American Bureau of Shipping - publishes
safety standards for shipbuilding, including specifications for
valves and fittings used in commercial maritime service.
AGA
AGMA
AISC
AIS1
ANSI
APFA
API
ASME
American Founemens Society - publishes information on casting
methods, procedures, and practices that are basic references for
product design, procurement, and inspection of cast products.
American Gas Association - publishes standards for approval,
certification, and application of gas appliances and the
accessories of gas appliances. American Gear Manufacturers Asso-
ciation - provides educators to the gear industry; publishes
information and standards on gears, gear-cutting and gear-checking
equipment. American Institute of Steel Construc- tion - provides
advisory services to help choose and utilize the most suitable type
of structural steel design. Obtains accep- tance for new design and
construction techniques. American Iron and Steel Institute -
publishes ferrous material specifications and test procedures.
American National Standards Insti- tute - provides a method for
achieving consensus on standardization matters involving codes and
standards developed by other organizations, that are applicable to
the design, dimensions, construction, testing, and application of
valves, fittings, and piping. American Pipe & Fittings
Association- encourages, contributes to, and cooperates in the
development of standards for products within the scope of the
association. American Petroleum Institute - publishes purchasing
specifications for valves and fittings used in the production,
transportation, and processing of liquid and gaseous hydrocarbon
materials. American Society of Mechanical Engineers - publishes
codes for the construction of pressure vessels and related
appurtunances including valves and fittings.
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MSS STANDARD PRACTICE SP-96
ASNT
ASQ
A C T X A n u 11.11
AWS
AWWA
CI
CDA
DIPRA
FCI
FMRC
FED STDS
American Society for Non-Destructive Testing - publishes
specifications for non-destructive examination procedures and
methods for parts of valves and fittings. American Society for
Quality Control- publishes specifications applicable to valve and
fitting components covering systems and procedures for quality as
surance.
Materials - publishes materials, products, systems, services,
including test methodology used in the manufacture of valves and
fittings. American Welding Society - publishes specifications for
materials and procedures used in welding and weld repair. American
Water Works Association- publishes standards for valves and piping
used in water supply systems, Chlorine Institute - publishes
special material-requirements and procedures for piping components
used in the production and handling of chlorine. Copper Development
Association - publishes chemical specifications for copper alloys;
supplements ASTM specifications for valve and fitting materials.
Ductile Iron Pipe Research Associa- tion - publishes information on
research, design, applications, and corrosion protection for
ductile iron pipe. Fluid Controls Institute - publishes standards
and practices for capacity, design, efficiency, manufacture, and
terminology of control equipment, including valves for gas,
hydraulic, pneumatic circuits, and steam. Factory Mutual Research
Corporation - publishes insurance-company standards for fire
protection, inspection, and consultation and provides certification
testing for fire- prevention and control equipment and procedures.
United states Government Specifications and Standards - publishes
standards for valves and fittings. Used for non-military and
A,,A,..... C-,:,L, C-.. T-..i-- "-1 -UllU1111 U W U i U b y L W
1 L G J b l i l ~ 1111U
2
IEEE
IFI
ISA
IS0
IEC International Electrotechnical Com- mission - publishes
standards and specifications for control valves, electrical and
electronic systems and apparatus. Institute of Electrical and
Electronics Engineers - publishes standards for electrical and
electronic equipment. Industrial Fasteners Institute - publishes
specifications for bolting and faskiers used ili t h manliuficte f
valves and fittings. Instrument Society of America - publishes
standards, educational, and reference material related to the
theory, design, manufacture, and use of instruments and controls in
many scientific and industrial applications including automatic
fluid-control systems. International Organization for Stand-
ardization - publishes technical specifications and recommendations
promoting the development of international standards. .
Intemational
O standards for valves, piping, and fittings. JIC Joint-Industry
Conference - publishes
hydraulic and pneumatic standards that af?ect valve and fitting
specifications and designs.
MCA Manufacturing Chemists Association - publishes chemical
statistics ,hand- books and manuals of recommended practices and
guidelines for handling chemicals.
MSS Manufacturers Standardization Socie- ty of the Valve and
Fittings Industry - publishes standard practices for dimensions,
marking, terminology, quality, testing, and other information for
manufacturers and users of products of the valve and fittings
industry.
MIL-STDS U.S. Military Specifications and Standards - standards
for valves and
fittings used by the Department of Defense.
NACE National Association of Corrosion Engineers - standards and
guidelines related to corrosion control; special material
requirements and procedures for piping components used in sour gas
and other corrosive services.
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NSF
PFI
RDT
NEMA National Electrical Manufacturers Association - publishes
specifications for electrical equipment. National Fire Protection
Association - publishes design and performance advisory standards
for valves and fittings.
NFPA National Fluid Power Association - publishes technical
standards for pumps, valves, cylinders, and fittings used in
transmitting energy by means of fluid within a pipe, primarily for
purposes of material handing or mechanism operation and control.
NSF International - publishes public and environmental health
standards. Pipe Fabrication Institute - publishes standards and
technical bulletins for high- pressure, high-temperature piping
systems and components for chemical plants, refmeries, central
power-stations, ships, etc. Reactor Development and Tech- nology
Division of U.S. qNuclear Regulatory Commission - publishes design,
performance, and quality assurance standards for valves and
fittings.
S A E Society of Automotive Engineers - publishes materials and
dimensional standards for fittings.
SAMA Scientific Apparatus Makers Associa- tion - publishes
standards covering process measurement and control devices
including valves, scientific apparatus, and laboratory
equipment.
SSPC Society for Protective Coatings - publishes specifications
for surface preparation and coating of valves and other piping
elements.
NFPA
UL
TAPP1 Technical Association of the Pulp and Paper Industry -
publishes test procedures for laboratory apparatus and process
control equipment for pulp, paper, and related industries.
Underwriters7 Laboratories - publishes safety and performance
standards and provides certification testing for valves, actuators,
and fittings used in fire-protection systems and for
hazardous-fluid systems.
U.S. DOT Department of Transportation - publishes regulations
applicable to valves and fittings used in the transportation of
gas, oil, and other hazardous materials in interstate commerce.
3. GLOSSARY
This section defines terms and expressions used to describe the
design, operation, and perfor- mance of valves, valve components,
and fittings. Where more than one expression is used to describe a
feature, the preferred term is defined, and synonymous or related
terms are referred to the preferred term. Flow phenomena are ex-
cluded fiom this listing. Pipe hanger and support terminology are
also excluded, but may be found in MSS SP-90, Guidelines on
Terminoloa for Pipe Hangers and Supports. Words underlined in the
definitions may be found defined elsewhere in this glossary.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
actuator:
actuator stem-force:
__L._I__ LL-.-L. lCiLUllUI L1UUSL.
actuator torque:
adjustable travel-stop:
air-cylinder actuator:
air-motor actuator:
all iron:
angle-disc check valve:
angle non-return valve:
angle pattern:
angle-stop vaive:
angle-stop check valve:
angle valve:
automatic control:
DEFINITION
the mechanical, hydraulic, electric, or pneumatic device or
mechanism used to open, position, or close a &.
the force produced by an actuator used to position a valve
stem.
a-ka; fr= &e iiiG-al~Eg fl&-e5 driving components of a
valve. expressed in pounds or kilo newtons.
a turning moment transmitted through the mounting flanges and
driving components of a a, expressed in pound foot or Newton
meter.
a device attached to a & or actuator that limits the range
of motion of a valve closure-member.
a type of power actuator using air to drive a cylinder
mechanism.
a type of power actuator wherein an air motor is used to supply
the force to drive the valve closure-member, often through a geared
mechanism.
a trim class used in cast iron valves wherein the seating
surfaces and stem, when present, are made of iron or steel.
a check valve with a element in an ande pattern body.
See ande-stop check valve.
a in which the body ends are at right angles.
See annle valve.
an angle pattern variant of a globe-type stopcheck valve.
an angle pattern variant of the globe valve only (other types of
ande valves must be designated specifically, such as angle-plug
valve).
an action derived fiom the combination of a valve. actuator, and
sensing and activating circuits, programmed to regulate a fluid
flow or process by throttling the valve closure-member in response
to process changes without operator intervention.
back face: the surface of a flange that is opposite the gasket
face.
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MSS STANDARD PRACTICE SP-96
@ 3. GLOSSARY TERMS
back seat:
back seat bushing:
ball:
ball check valve:
ball port:
ball-type disc:
ball valve:
bell end:
bellows-seal valve:
bi-directional valve:
blind flange:
block & bleed valve:
blowdown valve:
blowoff valve:
body:
body-bonnet joint:
body end:
DEFINITION
a seat on the bonnet or bonnet bushing that contacts a corres-
ponding seating surface of the - when the - is fully retracted.
See bonnet bushing and back seat.
the closure member in a ball valve or the closure member in a
ball check valve.
a check valve in which the check closure member is a ball.
the flow-way opening in the closure member of a ball valve.
a with a spherical seating, surface.
a close.
whose closure member is spherical and rotates to open or
See female end.
a & having a seal utilizing a bellows.
a & having substantially equivalent flow and shut-off capa-
bility in both directions.
a flanpe with no flow-way bore, used to provide a pressure-tight
closure of a flanged opening.
a & with two seatinp surfaces that provide simultaneous
blockage of flow from both valve ends and a means for draining or
venting the cavity between the seatinp surfaces.
See blowoff valve.
a vessel or piping.
used to release the pressurized contents of a pressure
the principal pressure-containing shell of a ends adapted for
connecting to piping. See also valve body.
or fitting, that has
the connection of a valve M to the bonnet (such as threaded
uni&$ breech lock, bolted, welded, or pressure seal type, or a
combination thereof; a capability for seal welding may be
included).
that portion of the M which is adapted for connecting to piping
components.
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MSS STANDARD PRACTICE SP-96 I
3. GLOSSARY
TERMS
body end-port:
body flange:
ody plug:
body seat:
body tap:
bolted bonnet:
bolted cap:
bolted cover:
bolted gland:
bonnet:
bonnet bolting:
bonnet bushing:
bonnet flange:
bonnet gasket:
bonnetless valve:
bonnet ring:
boss:
brazing end:
breech lock:
DEFINITION
the flow opening in the body end.
the flange on a valve body to which the bonnet or cover is
bolted.
see m. a tapped hole in a pressure-boundary wall often used for
connection to a drain or bwass.
a construction in which the bonnet is bolted in the &.
See bolted cover.
a cover attached to a by bolting.
See packing gland.
O a valve body closure component that contains an opening for
the - stem. the bolting that secures a bonnet to a valve body.
an insert in a bonnet that serves as a also provide a back seat
surface.
or & guide and may
the flange on a bonnet through which the bonnet is boltedto the
valve body.
the gasket that seals a body-bonnet joint on a valve.
a with no bonnet.
See union nut.
a raised area on the surface of a component.
an end of a or fitting adapted for brazing to pipe or tube.
a connection means between two components characterized by
interrupted lug-type elements that are engaged by a partial turn of
one part inserted into or over the other.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
bronze mounted:
bushing:
butterfly valve:
butt-welding end:
bypass:
bypass valve:
cage:
cap:
center-guided check valve:
center-to-end:
center-to-face:
chainwheel:
chain wrench:
check valve:
clamp gate valve:
DEFINITION
a trim class used in cast iron valves wherein the seating
surfaces, and when present the stem. are made of brass or
bronze.
See pipe bushing.
a obsthicts flow when the & is rotated to block the
flow.
that uses a rotatable & as a closure member and
an end of a valve or fitting adapted for welding to pipe by
abutting the end and welding within the groove formed between the
prepared ends.
a piping loop provided to permit flow around a valve closure-
member in its closed position.
a valve used in a bvuass.
in a globe valve, an element that fully surrounds the Valve Disc
providing support and alignment to the disc; in a ball check valve,
a part provided to guide and restrict the motion of the check m. a
fitting or system.
component used to effect closure of a piping
a check valve in which the closure member is perpendicular to
the flow.
the linear distance fiom the centerline of a port-passage end of
a non-flanged end fininn or anale valve to an opposing port-
passage end.
the linear distance fkom the centerline of a port passage of an
flanged end fitting or ande valve to an opposing flanged end.
a manual actuator that uses a chain-driven wheel to turn a
ya& stem, handwheel, or gearing.
a special form of chainwheel.
a unidirectional valve that is opened by the fluid flow in one
direction and closes automatically to prevent flow in the reverse
direction.
a gate valve in which the & and bonnet are held together by
a U-shaped clamp that passes through lugs cast on the and bonnet,
also called a saddle gate or clipgate &.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
closure member:
cock:
cold working pressure (CWP):
compact wafer:
composition disc:
compression fitting:
compressor:
concentric reducer:
control valve:
corporation stop:
coupling:
cover:
cover bolting:
cover gasket:
cover ring:
cross:
cross, reducing:
DEFINITION
a & component that is positioned in the flow stream to
permit flow or to obstruct flow, depending on its closure position;
in a specific design it may also be called a &, wedge, dun,
ball, g@e, diauhragm or other fnctionally similar expression (see
also oDerator).
a form of plug valve that depends exclusively on sealing of
conical surfaces to prevent leakage through the & and to the
atmosphere.
the maximum pressure at which a e or fittine, is allowed to be
used at ambient temperature.
a wafer & with a reduced outside b& diameter or slots to
provide external flange-bolt clearance.
a valve closure-member containing a non-metallic component for
sealing or stopping flow.
a fittine, for pipe or tube that seals and grips by the radial
deformation of circumferential sealing-elements.
in a diaphragm valve, a rigid member attached to the valve stem
to support the diaphragm and to force it against the &.
a reducer with both openings on the same centerline.
a in a system.
See cock.
a fitting used to make a linear connection between two lengths
of piping.
a & component that provides a closure for an opening into
the valve.
the bolting that fastens a covef to a valve.
the gasket in a & that seals the cover joint. the union ring
that connects a union cover to the of a valve.
a fitting having four openings of equal size in one plane at 90"
angles.
a
that provides the means for varying the rate of fluid flow
with one or more openings smaller than the inlet.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
cycle of operation:
cylinder actuator:
diaphragm:
diaphragm actuator:
diaphragm valve:
dielectric union:
disc:
disc face:
disc guide:
disc hinge-pin:
double block & bleed:
double disc:
drain:
drainage fitting:
drop elbow:
drop tee:
DEFINITION
the actuation of a fiom one limit of its operational position to
the opposite limit and return to its original position. Example:
full-closed to full-open to full-closed.
a fluid-powered actuator that converts hydraulic or pneumatic
pressure acting on a piston within a cylinder into a mechanical
force to impart motion to a valve closure-member.
a valve component consisting of a flexible sheet of material
arranged to contain a fluid and to which mechanical or fluid forces
may be applied to deform the sheet to interrupt fluid flow (see
closure-member).
a fluid-powered actuator that uses hydraulic or pneumatic fluid
pressure acting on a diaDhram to develop force to move the
closure-member.
a diaDhram against a raised section or weir on the
passageway.
that permits throttling of fluid flow by forcing a flow
See insulating union.
See closure member.
the seating surface of a &.
a guide that aligns the & relative to the e. a pin that
supports the of a & or tiltina-disc check valve.
See block & bleed valve.
a two-piece & used in a gate valve.
a connection provided in a valve bodv, bonnet, or purpose of
releasing fluid.
for the
a non-pressure rated fitting having an inside diameter the same
as the connecting piping, with a shoulder against which the piping
abuts (such fittings provide substantially continuous internal
flow-passage surfaces).
an elbow having two integral lugs or ears with screw holes for
mounting (sometimes called drop-ear or drop-eared elbow).
a tee having two integral lugs or ears extendmg fkom the side
opposite the outlet and equipped with holes for mounting (sometimes
called a drop-ear or drop-eared tee).
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3. GLOSSARY
TERMS
drum trap:
dual-sealing valve:
eccentric reducer:
eccentric plug valve:
elbow:
elbow, long-radius:
elbow, short-radius:
elbow, reducing:
elbow, side-outlet:
elbow, street:
electric-motor actuator:
end connection:
end-to-end dimension:
end-entry ball valve:
expansion joint:
eye bolt:
face-to-face dimension:
female end:
DEFINITION
a drainage fitting designed to provide a liquid seal in a drain
line and characterized by an upright, cylindrical body.
a which uses redundant seat-sealing means.
a reducer with the small end off-center.
a quarter-turn valve with either the journal or located
off-center.
a fitting used to chege the direction of piping.
an elbow with the center-to-face distance 1% times the nominal
size of the elbow.
an elbow with the center-to-face measurement equal to the
nominal size of the elbow.
an elbow with ends of different sizes.
an elbow with an additional outlet extending from the side of
the fitting usually 90 degrees to the plane of the inlet and
outlet.
an elbow having an external connection on one end and an
internal connection on the other.
a power actuator for valves wherein a gear-reduction unit is
powered by an electric motor.
the provision made on a valve, fitting, or pipe for attachment
to another piping component.
the overall length, along the axis of the pipeline, of a &,
fittina, or pipe.
a bail valve design in which the removal of an end piece.
and are accessible by the
a pressure-tight connection device that accommodates relative
movement of attached piping.
a threaded bolt which has a head fashioned to accommodate a
cylindrical cross-pin connection.
the dimension from the face of the inlet port to the face of the
outlet port of flanged valves or fittings.
a socket, solder end, bell end, or internally threaded end of a
valve, fitting or pipe which accepts the plain end or externally
threaded end of a piping component.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
finned bonnet:
fitting:
fitting, branch welding-outlet:
fitting, butt-welding:
fitting, flanged:
fitting, flared:
fitting, flareless:
fitting, socket-welding:
fitting, solder-joint:
fitting, threaded:
flange:
flange facing:
flange, lap-joint:
flange, reducing:
flange, slip-on:
DEFINITION
a bonnet with external fins located between the packing chamber
and flow area.
connector or closure used with piping or piping components to
form fluid lines and passages with a desired system
configuration.
a that is attached to the run pipe by welding (the branch pipe
is usually attached by welding, socket welding, or threading).
a fittinn whose end connections are adapted for butt-welding to
pipe or to other butt-welding fittings or valves.
a fittinn having flanved end end connections.
a f a designed for attachment of a tube having a pre-formed
flare on the tube end.
a tubing finine, which seals and grips by means which do not
involve a pre-formed flare at the end of a tube (see compression
fitting).
a fittinn with end connections having a socket configuration to
fit the ends of the pipe and in which the pipe is fillet welded in
place on its outside diameter.
a copper or copper alloy with solder end end connections
manufactured to permit joining to copper tube, a solder-end fitting
or by soldering or brazing.
a fittinn with threaded end connections for attachment to
threaded pipe.
an annular collar designed to permit a bolted connection with
similar collars.
the geometry of the mating surface of a flange.
a flange that has a radius at the intersection of the bore and
the flange face in order to slip over a lap-joint stub end; this
flange can be swiveled around a lap-ioint stub end in order to
align bolt holes.
a flange of a given size with a flow bore of a smaller size used
to make a joint between different pipe sizes.
a flange that slips over the end of a pipe or =and is fillet
welded in place.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
flange, socket-welding :
flange, threaded:
flange, welding-neck:
flanged end:
flangeless valve:
flat-faced flange:
flat full-face gasket:
flexible-wedge disc:
floating ball-ball valve:
flow regulation:
follower gland:
four-way valve:
full-opening-through- conduit valve:
fusible plug:
gate:
gate valve:
DEFINITION
a flange having a socket configuration that fits the end of a
pipe for fillet welding.
a low-hub flanve with a threaded bore for assembly with
4Lt,-...4,.a .A..,. uuoauou p y u .
a flanpe with a tapered hub bored to match the inside diameter
of matching pipe and with the hub beveled for butt welding to the
Pipe.
a type of end connection on a to other components with mating
flanves.
or a fitting, used for joining
a y-& intended to be mounted between pipe flanges with span
bolts passing fiom pipe flange to pipe flange. The WS may have
locators for line centering.
a flange that is flat from the flange periphw to the flow or
access opening.
a flat gasket that contacts the entire surface of a flat-faced
flanve. O a gate valve disc tha has a solid center but which is
flexible at the sealing periphery.
a ball valve design with a held in position only by two
seats.
control of flow passing through piping.
the element used to compress the gasket or sealing gasket of a
mechanical joint.
a flow through the valve and connected piping system.
with four ports arranged to control the direction of fluid
a attached piping.
whose opening is substantially equivalent to bore of
a non-reclosing plun, designed to melt at a specified
temperature.
the closure member of a gate valve.
a with a closure member, such as a gate. wedge, disc, or double
disc, that moves on an axis perpendicular to the direction of
flow.
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MSS STANDARD PRACTICE . SP-96
3. GLOSSARY
TERMS
gland:
gland flange:
gland follower:
globe valve:
grooved end:
guillotine valve:
handle-bar union:
handwheel :
hard facing:
hinge:
See packing gland and follower gland.
a flange bearing against a packing gland used to compress
packing.
See packing gland.
a on a axis perpendicular to the @.
with a closure member, such as a & or &, that moves
a circumferential recess that is cast, cut, or otherwise formed
onto a fittinn or end to form a .restrained joint when used with
the proper gasket and coupling.
See knife-gate valve.
a union nut that has one or more projections that may be struck
with a hammer for quick opening or closure (also known as lug-nut
or high-speed union).
a rimmed component designed to facilitate manual actuation of a
e. a deposit of hard, wear- and corrosion-resistant material
applied at the seating surfaces or other parts of a subject to
wear.
in a swing check valve, the pivotal element that supports the
relative to the bodv seat.
assembly
hinge pin: See disc hinge-pin.
holiday test:
hydraulic actuator:
DEFINITION
a nondestructive test of the coating of a &, hydrant, or
component part thereof, performed to electrically determine the
presence, if any, of voids or holidays in the coating.
a device that converts hydraulic energy into mechanical force
and motion for positioning a valve closure-member.
in-line check valve: See center-guided check valve.
inside-screw, non-rising stem: a iype of gate valve design in
which the rises on the threaded part of the stern instead of the
rising through the bonnet (the stern does not rise or descend as
the stern is turned).
inside-screw, rising-stem: a type of gate or globe valve design
in which the stern has both rotary and axial motion and rises as
the stern is turned (the threads are between the stem packing and
the closure member).
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS DEFINITION
insulating unions:
junk ring:
knife-gate valve:
lantern gland:
lantern ring:
lantern ring packing-chamber :
lap-joint stub end:
lateral:
lateral, reducing:
lateral, straight:
lay length:
lens joint:
lever actuator:
used to mechanically join piping for pressure-tight transmission
of fluids, with electrical insulation separating the joined piping
(also known as dielectric u s ) .
See packing washer.
a type of gate valve using a thin, flat m, usually used in
controlling slurries.
See lantern ring.
a rigid spacer-ring used in the lantern ring ype of packing
chamber to permit lubrication of the packing, purging of the -
shaft or stern area, or a leak-off system.
a above and below the lantern ring.
sealing chamber with a lantern ring and rings of packing
a fittinn, normally used with a lap-joint flange, consisting of
a cylinder or bmel with an integral flat ring or lap around one
end, with a radius at the external intersection of the barrel and
the lap, and an opposing end that is beveled for butt-welding to
matching pipe (the lap face typically has a spirally serrated
finish to serve as a raised-face gasket for the flange in lap-joint
flange connections).
a three-way fittinn having two pipe ends opposite each other in
a straight run and a branch outlet projecting from the run at an
angle, usually 45".
a lateral with the branch outlet smaller than the run.
a lateral with all three openings, the run as well as the branch
outlet, the same size.
the effective length of the or fittina along the axis of the
pipeline which if the or e (along with gaskets) were somehow
removed would be the gap remaining between the pipe ends.
a bolted flange joint characterized by metal-to-metal sealing
involving the inelastic deformation of the flange mating surfaces
of a pierced, lens-shaped member.
an actuator that includes an arm or lever that is manually moved
to operate a valve.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
lift check valve:
limit switch:
lined:
live loading:
lubricant:
lubricated plug valve:
lug valve:
lug-wafer valve:
lugged valve:
male end:
mechanical connection:
mechanical joint:
memory stop:
modulating:
multi-turn actuator:
DEFINITION
a check valve with a closure member that is lifted by the force
of the fluid flow.
a switch (electrical, pneumatic, or hydraulic) that senses a
vaJs closure-member at a particular position.
a term applied to valves. fittings, or piping having internal
surfaces of protective materiais to enhance resistance to
corrosion, erosion, or contamination.
a means of maintaining a compressive load on bolted assemblies,
such as by the use of disc springs (such as Belleville washers) on
a packingglano.
a material (such as iight grease or oil) that is applied to a
vaJs component to reduce friction.
a plug valve in which the plun rotation and sealing can be
assisted by sealant applied under external pressure.
a valve with short face-to-face dimensions in proportion to the
fluid-passage diameter designed to be bolted to one or both flanges
in a line by the use of fasteners, which are threaded into lug
protrusions of the valve body.
~
See lup valve. single flanged valve and wafer valve.
See lup valve and single flanged valve.
the externally threaded or plain end of a pipe, tube, valve or
fittinn.
a term used to designate various methods for assembling product
components by mechanical means.
a bolted joint of a packinp chamber design for coupling valves,
fittings, and pipe utilizing a follower gland to compress the
sealing gasket.
an accessoq on a valve that provides for repeatable stopping of
the closure member at a position other than fully open or
closed.
See automatic control.
an actuator that transmits a torque to the revolution.
for at least one
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS DEFINITION
National Standard Thread:
nipple:
nominal pipe size .(NPS):
non-lubricated plug valve:
non-return valve:
non-rising stem:
obturator:
open left:
open right:
operating cycle:
operator:
O-ring unions:
outside screw & yoke (OS & Y):
P-trap:
packing:
packing assembly:
packing box:
packing chamber:
a dimensional system of threading commonly used on pipe, pipe
valves, and fittings in the U.S, including tapered (NPT), straight,
(NPSM) and Dryseal thread forms.
a piping component consisting of a short piece of pipe with both
-..Am owto-all.7 thvn,,AeA UIlUJ urzwiiiuii, ..-vuuvu.
a size-identification number, not necessarily an actual
dimension.
a plug valve that does not require lubrication.
See stop check valve.
a valve stem that does not move into and out of the &e when
the is actuated.
See closure member (this term is used in international
standards).
counter-clockwise rotation of an actuation device to open a
&.
clockwise rotation of an actuation device to open a &.
See cycle of operation.
a person who causes a to be actuated.
pipe unions using O-rings for pressure sealing.
a & design that houses the packing between the and the valve
body.
threads
a drainage fitting having a vertical d e t into a F-shaped
water- seal section that has a horizontal or 90 outlet.
a material that provides a seal around a movable component
through a pressure boundary (q.v., packing around a valvestem).
a --sealing system consisting of a material or one or more
mating components contained in a chamber, which may provide an
effective seal through a manually adjustable means of
compression.
See packinv chamber.
the part of the packing assemblv containing the packing used to
seal against leakage around a movable component, such as a - stem
or shaft (also called stuffing box or packing box.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
packing gland:
packing, injection:
packing nut:
packing washer:
parallel-disc gate valve:
parallel expanding-disc gate valve:
parallel sliding-disc gate valve:
part-turn actuator:
pinch valve:
pipe bushing:
pipe plug:
pipe thread:
piston check valve:
pivot pin:
plain end:
plug:
plug cock:
DEFINITION
a component used to compress packing. Also called a packing
follower.
a material used in a sealing system that uses external pressure
for injection into a packing chamber.
a nut used on a packing assembly to compress packing, often used
in conjunction with a packing Pland.
a spacer placed at the end of a set of packing to prevent
extrusion of packing.
a double-disc gate valve design in which the loaded against the
sliding-disc gate valve).
faces are parallel and are (see parallel exmndina-disc gate
valve and parallel
a double-disc gate valve design in which the independent of each
other, and loaded against the by a wedging mechanism between the
discs and line pressure on downstream side.
faces are parallel,
a type of double-disc gate valve in which the faces are
parallel, independent of each other, and loaded against the seats
by a spring and line pressure on the downstream side.
an actuator that transmits a torque to a for less than one
revolution.
a is ?pinched to effect closure.
design having a flexible tube or hose for a flow passageway,
which
a fittinn with one external and one smaller internal end.
a threaded device with no opening used to provide closure of an
internally threaded port.
See National Standard Thread and threaded end.
a lift check valve design in which the closure member acts like
a piston within a cylinder.
See hinge D~IL
a male end on a tube, pipe, valve, or fitting that inserts or
engages into a female end or mechanical joint of another piping
component.
a closure member used in a plug valve.
see &.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
'TERMS
plug, countersunk:
plug, headed:
J..- ,-li-#.. pue -0".
plug valve:
pneumatic actuator:
pneumatic-motor actuator:
pressure-seal gasket:
pressure-seal joint:
push-on joint:
quarter-- valve:
quick-opening valve:
quick-opening control valve:
raised face:
reduced-port valve:
DEFINITION
a tapered threaded end vive vlug having a square or hexagon
counter- sunk socket.
a pive vlug; having a hexagonal or square head.
a ya& in which the closure member is of cylindrical or
conical shape and can be rotated into alignment with the flow
passageway and in which sealing is effected by the fit of the
cylinder or cone into the mating surface of the bodv.
a device that converts pneumatic pressure into mechanical motion
and force to move a valve closure-member.
See air-motor actuator.
the sealing ring member of a pressure-seal joint.
a cover or bonnet closure-assembly in which internal fluid
pressure-force on the cover or bonnet increases the compressive
loading on the sealing gasket.
a generic term describing jointing designs that utilize a rubber
gasket that fits into an annular recess inside of a pipe, fittinn,
or socket end and is compressed radially upon entry of the beveled
plain end of a pipe or fitting.
a ya& in which the closure member is rotated approximately
90" to move from full-open to full-closed position.
a ya& designed to open or close quickly.
a Valve in which the closure member reaches maximum flow with
minimum lift.
the annular surface on certain types and classes of flanves that
projects above the bolting ring and provides the gasket-compression
area.
a ya& equipped with a reduced flow-passageway at the closure
member for a given end connection size (also called a
restricted-port valve).
reducer: a fittinq that functions as a couuling but has a
smaller pipe size on one end.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
regulating valve:
relief valve:
remote control:
restrained joint:
retuni bend:
return-bend, long radius:
return-bend, short radius: /
ring joint:
rising stem:
roof connection:
running trap:
rupture disc:
safelyrelief valve:
safety valve:
DEFINITION
a through the e. designed to control the flow rate or pressure
of fluid flowing
a when its pressure setting is exceeded.
designed to actuate automatically to reduce its internal
pressure,
a system for operating a valve actuator fi-om a distant
location.
a rubber-gasket joining system for valves. fittings, and pipe
that includes provisions to prevent axial joint-separation due to
hydraulic intemal- pressure.
a U-shaped fitting that changes the direction of piping 1
SO.
a return bend that has a center-to-center dimension three times
the nominal size of the fitting.
a return bend that has a center-to-center dimension two times
the nominal size of the fitting.
a bolted flange design in which the adjacent flange faces
contain grooves designed to receive a shaped, continuous ring
arranged in such a way that the ring is compressed by the mating
flange grooves to provide a seal.
a valve stem that moves into and out of a &when the is
operated. /
a drainage fitting used with roof flashing and to extend the
length of a vent Pipe.
a water-trap drainwe fitting having a horizontal inlet into a
U-shaped water seal section and with a horizontal outlet (the
fitting is usually funiished with a vent opening extending
vertically opposite each leg of the U-bend).
a pressure-relieving device designed to burst at a specified
internal pressure.
a pressure-relief valve suitable for use either as a safety
valve or &f depending on application.
a pressure-relief valve characterized by rapidly opening
operation.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
screwed bonnet:
screwed end:
screwed flange:
seal, water:
seal-welded bonnet:
sealant:
seat:
seat bushing:
seat insert:
seat ring:
seating surface:
seif-controlled regulator:
shaft:
shouldered end:
silent check valve:
silver brazing:
single-flanged valve:
DEFINITION
See threaded-in bonnet and threaded-over bonnet.
See threaded end.
See flange. threaded.
a seal using water as a barrier between the packing and the
atmosphere.
a design in which the bonnet is mechanically attached to a
&, such as by threading, and the joint is seal-welded to
prevent leakage (the seal weld shall not be considered to
contribute strength to the joint).
a material, such as pipe dope, PTFE tape, or grease, that is
applied to valve components to improve the sealing of seats.
threads and m. that portion of a & against which the closure
member presses to effect shut-off.
See seat ring.
material (usually a resilient material) inserted into the seat
face to provide improved sealing.
a separate piece inserted in a valve body to form a seat against
which the closure member engages to shut off flow.
the contacting surface of a closure member and a closure.
that effect
a redating valve that is activated by the fluid flowing through
the &.
See m. a special shoulder that is cast, welded, or threaded onto
a pipe, fitting, or valve end to form a restrained joint when used
with the proper gasket and coupling.
See center-Puided check valve.
a brazing process using silver alloys.
a style of wafer valve with a configured to be bolted as a
closure member on the end of a pipeline without any additional
flange or retaining parts; the holes that mate with the pipeline
flanges may be tapped or untapped; the body exterior may be
cylindrical like the pipeline flange or may be cut away such that
the outside diameter of the pipeline flange occurs only at the
bolt-hole locations.
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS
socket-welding end:
socket-welding reducing insert:
solder end:
solid-wedge disc valve:
spigot end:
spindle:
spindle bushing:
split wedge:
stem:
stem bushing:
stem nut:
stop check valve:
street ell:
street tee:
stroke:
stuffing box:
stuffing nut:
swing check valve:
tapping sleeve:
DEFINITION
an end connection of a insertion of pipe ends for joining by
fillet welding.
or m configured to permit the
a fittinp. with an insertion that reduces a socket-welding end
to a smaller pipe size.
the end of a valve or fitting adapted for soldering to pipe or
tube.
a pate valve design using a onepiece &c or wedge not
designed for flexibility.
See plain end.
see m. See stem nut.
a two-piece wedge used in a gate valve with non-parallel e. a
&e component to which motion is impaired outside the assembly
to move the closure member inside the valve.
See stem nut.
the part of the effort into thrust on the valve stem.
assembly that converts rotary actuating
a check valve in which the closure member can be mechanically
closed.
See elbow. street.
See tee. street.
See travel, rated.
See packing chamber.
See packing nut.
a check valve in which the closure member is mounted so that it
opens with presence of flow or pressure and closes with the absence
of flow or pressure.
a fitting that can be assembled on an existing main to make a
branch or @ connection to the main with a -taming, valve and
tavvinp machine,
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MSS STANDARD PRACTICE SP-96
3 . GLOSSARY
TEJRMS
tapping machine:
tapping valve:
tee:
tee, reducing:
tee, straight:
tee, side-outlet:
tee, street:
threaded-in bonnet:
threaded-over bonnet:
threaded end:
three-way valve:
throttling:
thrust collar:
tilting-disc check valve:
tongue-and-grooved joint:
travei, rated:
trim:
True Y:
DEFINITION
a machine used to cut a hole into an existing pressurized or
non- pressurized main through the use of a tauDinP sleeve and -
(also called a drilling machine).
a gate valve designed with end connections to provide proper
alignment and positioning of a tauuinp sleeve, valve, tapping
rnucl,i.i.,e, CE! the v ~ 2 t e ~ ~ ~ y fa: u q p i n g
cpe:uticn.
a branched-outlet fittina used to permit straight through and
90" flow.
a tee with unequal pipe size connections.
a tee with all three openings, the run as well as the branch
outlet, the same size.
a @ with an additional outlet extending from the side of the
fitting at 90" from the plane of the other three.
a tee with external pipe threads on one end of the run.
a bonnet that is threaded into the w. a bonnet into which the
bodv is threaded.
an end on a valve, fitting, or pipe that permits parts to be
joined by engaging external and internal threads.
a valve with three ports, arranged to control the direction of
fiuid flow through the valve and connected piping system.
a reduction of flow through a valve by partial closure of the
closure-member.
a device for restraining axial movement of a m. a check valve in
which the closure member pivots, but not entirely out of the flow
passage.
a joint in which a tongue (a raised annular surface) on one
component engages a mating groove in another to assist in
mechanical alignment and gasket retention of the assembly.
the amount of linear or rotary movement of the valve stem from
the closed position to the fully open position.
functional parts of a refers to the stem, closure member, and
seating surfaces.
that are exposed to the line fluid, usually
See wye.
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MSS STANDARD PRACTICE SP-96
0 3. GLOSSARY TERMS
trunnion ball valve:
tucker connection:
unidirectional valve:
union:
union bonnet:
union cover:
union fitting:
union nut:
union ring:
union, ground-joint:
union, gasket:
v-port plug:
valve:
valve actuator:
valve body:
valve closure-member :
valve plug:
valve seat-port:
DEFINITION
ball valve with a baJl supported by two bearings (trunnion) in
the valve body.
a drainage vent fittinn having a threaded joint on one end and a
caulked joint on the other end, used to couple a threaded vent pipe
to a pipe having a plain or spigot end.
a ya& designed for sealing only in one direction.
a multi-piece fitting that allows the joining or separating of
piping without rotating the piping,
a valve bonnet that is fastened to the valve body by means of a
union nut.
a cover fastened to the by means of a union nut.
see u-. the threaded ring that joins the & and bonnet or
cover of a union bonnet or union cover valve or principal uni>
component.
See union nut.
a fittina assembly consisting of a tail or male part, a head or
female part, and a union nut (the seating surfaces between head and
tail are precision machined to produce a leak-tight joint.
a uni> employing a resilient gasket for sealing.
a type of valve dug or letter Y to provide specific throttling
characteristics.
that has an orifice in the shape of the
a device that isolates or controls fluid direction or flow rate
(synonymous with stop, e, faucet, tap, bib). See actuator.
see &.
See closure member.
see &.
an opening in a the closure member.
that can be partly or completely blocked by
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MSS STANDARD PRACTICE SP-96
3. GLOSSARY
TERMS DEFINITION
valve stem:
valve stem-extension:
valve stem-thrust:
valve stem-torque:
valve trim:
vane:
wafer valve:
water gage:
wedge:
wedge gate valve:
welded bonnet:
welding end:
wye:
Y:
Y-type valve:
yoke:
yoke bushing:
yoke nut:
yoke sleeve:
see m. means for extending the stern length.
the force required to actuate a linear movement of a valve
stem.
a torque required to actuate a rotary movement of the valve
stem.
see a. see &.
a valve designed to. be installed between flanges, which has a
short face-to-face dimension in relation to the pipeline
diameter.
See liauid-level page.
a gate valve closure member with inclined surfaces that
mechanically force sealing contact of the gate or &(s) (in
double disc valves, the wedpe may act as a spreading device).
a gate valve design in which a wedae-shaped closure member is
forced between angled seats to stop flow.
a design in which the bonnet is welded directly to the M .
or fittinn connection end designed for attachment to a pipe or
other or fitting by welding.
a three-way fittinp, with a flow passage shaped like the letter
Y (sometimes called a true Y or a true wye).
see m, a modified globe valve in which the a t and bonnet are at
an angle other than 90 to the flow passage.
that part of a mount the valve actuator.
assembly tised to position the stem nut or to
See stem nut.
See stem nut.
See stem nut.
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MSS STANDARD PRACTICE SP-96
e 4, ABBREVIATIONS
4.1 This section lists abbreviations and their meanings used to
describe valves and fitting types, features, and parts.
BB BFV BWE CI CRES CWP DD DI DN DWV ELL F&D FF FLG FO FTTG
Fw G HF
IBBM om
IPS ISNRS ISRS MAV MJ MOV NPS NPT
Bolted Bonnet Butterfly Valve Butt-welding End Cast Iron
Corrosion-Resistant Steel Cold Working Pressure (Preferred) Double
Disc Ductile Iron Diameter Nominal (Metric) Drainage- Waste-Vent
Fitting Elbow Faced & Drilled Flange Flat Face Flange Faced
Only Fitting Flexible Wedge Gas Hard Faced Handwheel Iron-Body
Bronze Mounted (see Bronze Mounted) Iron Pipe Size Inside-Screw,
Non-Rising Stem Inside-Screw, Rising Stem Motor-Actuated Valve
Mechanical Joint See MAV Nominal Pipe Size National Standard Pipe
Thread Taper
NRS OS&Y OWG PN P-T RF RS RTJ S sc SJE ss SWE SWP T TDCV w
WOG WSP m Y
Non-Rising Stem Outside Screw & Yoke Oil, Water & Gas
(see CWP) Pressure Nominal (Metric) Pressure-Temperature Raised
Face Rising Stem Ring-Type Joint Steam Swing Check Valve
Solder-Joint End Stainless Steel Socket-Welding End Steam Working
Pressure (preferred) Tee Tilting-Disc Check Valve Water Water, Oil,
and Gas (see CWP) Working Steam Pressure Working Water Pressure Wye
Fitting
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List of MSS Standard Practices (Price List Available Upon
Request)
Standard Finishes for Contact Faces of Pipe Flanges and
Connecting-End Flanges of Valves and Fittings Spot Facing for
Bronze, Iron and Steel Flanges Standard Marking System For Valves,
Fittings, Flanges and Unions Class 150 Corrosion Resistant Gate,
Globe, Angle and Check Valves with Flanged and Butt Weld Ends (R
01) Wrought Stainless Steel Butt-welding Fittings (R 01) Steel
Pipeline Flanges Bypass and Drain Connections Class 15OLW Corrosion
Resistant Cast Flanges and Flanged Fittings Quality Standard for
Steel Castings and Forgings for Valves. Flanges and Fittings and
Other Piping Componets - Magnetic Particle Examination Method
Quality Standard for Steel Castings for Valves, Flanges, and
Fittings and Other Piping Components - Radiographic Examination
Method Quality Standard for Steel Castings for Valves, Flanges,
Fittings, and Other Piping Components - Visual Method for
Evaluation Of Surface Irregularities Pipe Hangers and Supports -
Materials, Design and Manufacture Connecting Flange Joint Between
Tapping Sleeves and Tapping Valves Pressure Testing of Steel Valves
High Pressure Chemical Industry Flanges and Threaded Stubs for Use
with Lens Gaskets Butteffly Valves High Pressure Buttemy Valves
with Offset Oesign Pipe Hangers and Supports - Selection and
Application Cast Iron Gate Valves, Flanged and Threaded Ends Gray
Iron Swing Check Valves, Flanged and Threaded Ends Ball Valves with
Flanged or Butt Welding Ends for General Service (R 96) Brazing
Joints for Wrought and Cast Copper Alloy Solder Joint Pressure
Fittings Specification for .High Test Wrought Butt Welding Fittings
(R 00) Guidelines for Pipe Support Contractual Relationships Cast
Iron Plug Valves, Flanged and Threaded Ends Socket-Welding Reducer
Inserts Bronze Gate, Globe, Angle and Check Valves Stainless Steel,
Bonnetless. Flanged Knife Gate Valves Valve Pressure Testing
Methods Class 3000 Steel Pipe Unions, Socket Welding and Threaded
Cast Iron Globe 8 Angle Valves, Flanged and Threaded Ends
Guidelines for Metric Data in Standards for Valves, Flanges,
Fittings and Actuators (R 96) Factory-Made Butt-welding Fittings
for Class 1 Nuclear Piping Applications (R 01) Diaphragm Valves
Pipe Hangars and Supports - Fabrication and Installation Practices
Guidelines on Terminology for Pipe Hangers and Supports (R 96)
Guidelines for Manual Operations of Valves MSS Valve User Guide
Quality Standard for Steel Castings and Forgings for Valves,
Flanges, and Fittings and Other Piping Components-Liquid Penetrant
Examination Method Quality Std for Ferritic and Martensitlc Steel
Castings for Valves, Flanges, and Fittings and Other Piping
Components-Ultrasonic Examination Method Swage(d) Nipples and Bull
Plugs Guidelines on Terminology for Valves and Fittings Integrally
Reinforced Forged Branch Outlet Fittings-Socket Welding, Threaded,
and Buttwelding Ends Protective Coatings for the Interior of
Valves, Hydrants, and Fittings (R 01) Instrument Valves
Qualification Requirements for Elastomer Diaphragms for Nuclear
Diaphragm Type Valves (R 01) Part-Turn Valve Actuator
Attachment-Flange and Driving Component Dimensions and Performance
Characteristics (R 01) Multi-Turn Valve Actuator Attachment -
Flange and Driving Component Dimensions and Perormance
Characteristics (R 00) Wrought Copper and Copper Alloy Insert
Fittings for Polybutylene Systems Wrought Copper Solder Joint
Pressure Fittings (R 01) Instrument Valves for Code Applications (R
96) Cast Copper Alloy Flanges and Flanged Fittings, Class 125, 150
and 300 (R 00) Transition Union Fittings for Joining Metal and
Plastic Products Resilient-Seated Cast Iron-Eccentric Plug Valves
Welded Fabricated Copper Solder Joint Pressure Fittings Ball Valves
Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends
Gray-Iron and Ductile-Iron Tapping Sleeves Quality Standard for
Evaluation of Cast Surface Finishes - Visual and Tactile Method.
This SP must be sold with a IO-surface, three dimensional Cast
Surface Comparator, which is a necessary part of the Standard.
Additional Comparators may be sold separately at $25.00 each. Same
quantity discounts apply on total order. Connecting Joint between
Tapping Machines and Tapping Valves Corrosion Resistant Pipe
Fittings Threaded and Socket Welding, Class 150 and 1000 Excess
Flow Valves for Natural Gas Service Service Line Valves and
Fittings for Drinking Water Systems Bellows Seals for Globe and
Gate Valves Compact Steel Globe & Check Valves - Flanged,
Flangeless. Threaded & Welding Ends (Chemical & Petroleum
Refinery Service) Belled End Socket Welding Fittings, Stainless
Steel and Copper Nickel Flexible Graphite Packing System for Rising
Stem Steel Valves (Design Requirements) Qualification Testing
Methods for Stem Packing for Rising Stem Steel Valves Plastic
Industrial Ball Valves Non-Ferrous Threaded and Solder-Joint Unions
for Use With Copper Water Tube Fabricated Tapping Sleeves Gray Iron
and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves
Steel In-Line Spring-Assisted Center Guided Check Valves Bracina
for Piping Systems Seismic-Wind-Dynamic Design, Selection,
Application
Number SP-c2001 SP-9-2001 SP-25-1998 SP-42-1999 SP-43-1991
SP-44-1996 SP-45-1998 SP-51-2000 SP-53-1999 1
SP-54-1999 SP-55-2001
SP-58-1993 SP-60-1999 SP-61-1999 SP-65-1999 SP-67-1995
SP-68-1997 SP-69-1996 SP-70-1998 SP-71-1997 SP-72-1999 CP-73-1991
SP-75-1998 SP-77- 1995 SP-78-1998 SP-79-1999a SP-80-1997 SP-81-2001
SP-82-1992 SP-83-2001 SP-85-1994 SP-86-1997 SP-87-1991 SP-88-1993
SP-89-1998 SP-90-2000 SP-91-1992 SP-92-1999 SP-93-1999
SP-94-1999
SP-95-2000 SP-96-2001 SP-97-2001 SP-98-2001 SP-99-1994
SP-100-1997 SP-101-1989 SP-102-1989 SP-103-1995 SP-104-1995
SP-105-1996 SP-106-1990 SP-107-1991 SP-108-1996 SP-109-1997
SP-l1C-1996 SP-I 11-2001 SP-112-1999
SP-113-2001 SP-114-2001 SP-115-1999 SP-116-1996 SP-117-1996
SP-118-1996 SP-119-1996 SP-120-1997 SP-121-1997 SP-122-1997
SP-123-1998 SP-124-2001 SP-125-2000 SP-126-2000 SP-127-2001 (R
YEAR) Indicates year standard reaffirmed without substantive
changes
A large number of former MSS Practices have been approved by the
ANSI or ANSI Standards, published by others. In order to maintain a
single source of authoritative information, the MSS withdraws its
Standard Practice in such cases.
Manufacturers Standardization Society of the Valve and Fittings
Industry, Inc. 127 Park Street, N.E., Vienna, VA 22180-4620 (703)
281-6613 Fax# (703) 281-6671
COPYRIGHT Manufacturers Standardization Society of the Valve and
FittingsLicensed by Information Handling ServicesCOPYRIGHT
Manufacturers Standardization Society of the Valve and
FittingsLicensed by Information Handling Services