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Matthews Engineering Training Ltd

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Slide 1

WELD PROCEDURE SPECIFICATIONS

(WPS):FORM QW-482

This presentation is to help you understand

the variables on the WPS form QW-482

As you review this presentation ,make sure

you have a printed copy of your QW-482

form .The idea is that as you look at eachslide, you look at the corresponding area on

your QW-482 form

PRESENTATION 2

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Slide 2

This is the front of the

form

FORM QW-482

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Slide 3

This is the back of the

form

FORM QW-482

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Slide 4

WPS:FORM QW-482

Red= Essential variables

Green= Non-essentialvariables

Yellow= Supplementary

essential variables

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Remember . it does not matter if a variable is essential or non essential

when producing or reviewing a WPS, ALL variables should be addressed.

It is only when a variable is being taken outside of its qualified range that we

need to know if it is essential or not because this will determine if a new

procedure is required.

The text colour shows whetheran entry on the form (for

SMAW,GTAW,GMAW or SAW)

is an essential,supplementary or

non-essential variable

Key

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Slide 5

Start by looking at the top

section of the QW-482 form

The next slide shows this section

in detail.Note the colour codes

denoting the classification of

variableE

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Slide 6

QW 482 WPS (front)

Company Name____________________________________

By:________________________***____________

Welding Procedure Specification No _______________Date______________ Supporting PQR

No____________

Revision No______________________ Date________________

Welding Process(es)___________________________________

Type(s)____________________ Automatic, Manual, machine or Semi Automatic

Assessment of these areas is not part of the exam assessment but note the

welding process and type(manual or automatic) as this will determine what

welding variables need to be considered.

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WPS:FORM QW-482

Ensure the WPS is signed

to show it is an authorised

procedure

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Slide 7

Now the next section

Got the idea?

The next slide shows this sectionin detail.Again, the colour codes

denote the classification of variable

WPS:FORM QW-482

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Slide 8

JOINTS (QW-402) Details

Joint Design _______________________________________

Backing (Yes)________________ (No) _________________

Backing Material (Type)______________________________Refer to both backing and retainers

Metal Nonfusing Metal

Nonmetallic Other

Sketches, Production Drawings, Weld Symbols or Written Description should show the general arrangement of the parts to bewelded. Where applicable, the root spacing and the details of weld groove may be specified.

(At the option of the manufacturer, sketches may be attached to illustrate joint design, weld layers and bead sequence,

eg for notch toughness procedures, for multiple process procedures etc)

SMAW

GTAW Groove design, backing, root spacing and retainers

GMAW

SAW

Note how these show the

classification of variables for the

4 main processes

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Slide 9

BASE METALS (QW-403)

P-No. ______________ Group No.____________ to P-No._______________ Group No. ______

OR

Specification type and grade_______________________________________________________

to

Specification type and grade________________________________________________________

OR

Chemical Analysis and Mechanical properties__________________________________________

to

Chemical Analysis and Mechanical properties__________________________________________

Thickness Range:

Base Metal: Groove______________________________ Fillet______________________

SMAW

GTAW

GMAW

SAW

P-No orspec orchemical analysis and thickness range must be addressed E

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Slide 10

FILLER METALS (QW-404) Each base metal-filler metal combination should be recorded individually

Spec. No (SFA) ________________1__________________________________________________________________

AWS No (Class)________________2_________________________________________________________________

F-No_________________________3________________________________________________________________A-No _________________________4_______________________________________________________________

Size of filler metals _____________5_______________________________________________________________

Weld Metal

Thickness range

Groove _________________6______________________________________________________________

Fillet____________________7_____________________________________________________________Electrode-Flux (Class) __________8______________________________________________________________

Flux Trade Name ______________9_____________________________________________________________

Consumable Insert ____________10______________________________________________________________

Other __________________________________________________________________________________________

SMAW Nos 1, 2, 3, 4, 5, 6, 7

GTAW Nos 1, 2, 3, 4, 5, 6, 7, 10 must be addressed

GMAW Nos 1, 2, 3, 4, 5, 6,7

SAW Nos 1, 2, 3, 4, 5, 6, 7, 8, 9

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These numbers refer to the line numbers shown here

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Slide 11

Now the same for the back of

the form

Got the idea?

The next slide shows this section indetail.Again, the colour codes denote

the classification of variable

WPS:FORM QW-482

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Slide 12

QW 482 (Back)WPS No _________ Rev __

POSITIONS (QW-405)Position(s) of Groove ________________

Welding Progression: Up _______ Down __________

Position(s) of Fillet ___________________________

SMAW

GTAW Positions and welding progression (for vertical welds) must be addressed

GMAW

SAW Positions

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Slide 13

PREHEAT (QW406)Preheat Temp. Min ________________________

Interpass Temp. Max ______________________

Preheat Maintenance _______________________

(Continuous or special heating , where applicable, should be recorded)

POSTWELD HEAT TREATMENT (QW-407)

Temperature Range ____________________

Time Range __________________________

SMAW

GTAW PWHT requirements must be addressed

GMAW

SAW

SMAW

GTAW Min Preheat temp, max interpass temp and preheat maintenance must be addressed

GMAW

SAW

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Slide 14

GAS (QW-408)

Percent composition

Gas(es) (Mixture) Flow Rate

Shielding ______i_____ ____2______ ____3______

Trailing _______4____ _____5_____ _____6_____

Backing ______ 7______ ___8_______ ___9_______

SMAW Not applicable

GTAWGMAW 1, 2, 3, 4, 5, 6, 7, 8, 9 must be addressed

SAW Not applicableE

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Slide 15

ELECTRICAL CHARACTERISTICS (QW-409)

Current AC or DC _________1______________ Polarity________2__________

Amps (Range) _________ _3_________________ Volts (Range) _____4________(Amps and volts range should be recorded for each electrode size, position, and thickness, etc. thisinformation may be listed in a tabular form similar to that shown below).

Tungsten Electrode Size and Type_____________________5_________________________________

(Pure Tungsten, 2% Thoriated, etc)

Mode of Metal Transfer for GMAW______________________6_______________________________

(Spray arc, short circuiting arc, etc)

Electrode Wire feed speed range______________________7__________________________________

SMAW 1, 2, 3, 4

GTAW 1, 2, 3, 4, 5, must be addressed

GMAW 1, 2, 3, 4, 6, 7

SAW 1, 2, 3, 4, 7

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Slide 16

SMAW 1, 3, 4, 7, 10

GTAW 1, 2, 3, 4, 5, 7, 8, 10 must be addressed

GMAW 1, 2, 3, 4, 5, 6, 7, 8, 10

SAW 1, 3, 4, 5, 6, 7, 8, 10

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FORM QW-482 (Back)

TECHNIQUE (QW-410)

String or Weave Bead ________________________________________1

Orifice or Gas Cup Size _______________________________________2

Initial and Interpass Cleaning (Brushing, Grinding, etc)__________ __3

Method of Back Gouging ______________________________________4Oscillation __________________________________________________5

Contact Tube to Work Distance ________________________________ 6

Multiple or Single Pass (per side) _______________________________7

Multiple or Single Electrodes ___________________________________8

Travel Speed (Range) ________________________________________ 9Peening ____________________________________________________10

Other ______________________________________________________11

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Slide 17

Other

(remarks, comments,

technique, torchangle, etc)

Travel

Speed

Range

Volt

range

Current

Amp

Range

Current

Type

Polarity

Filler Metal

Diameter

Filler

Metal

Class

ProcessWeld

Layer(s)

Refer to Electrical characteristics (QW- 409) which says:-

(Amps and volts range should be recorded for each electrode size, position, and thickness, etc.this information may be listed in a tabular form similar to that shown above).

In fact the WPS assessment in the exam will only contain one filler metal for a single welding

process so this section should not be required.

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Slide 18

BEFORE PROCEEDING

FURTHER

Check now that you know what the classificationof the various variables are on the WPS for the 4

main welding processes

The next presentation will look at the same thing for PQRs

GMAWSMAW GTAW SAW

WPS

FORM QW-482

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