7/30/2019 ASME B31.1 (Interpretação Nº 21) http://slidepdf.com/reader/full/asme-b311-interpretacao-no-21 1/6 INTERPRETATIONS NO. 21 Replies to Technical Inquiries January 1, 1992, ~h rough un e 30, 1992 It has been agreed to publish interpretations issued by the B31 Committee concerning B31.1 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies either to the latest Edition or Addenda at the time of issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequent revisions to the Code may have superseded the reply. These interpretations are not a part of the Code or the Addenda. These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity. In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply bearing the original interpretation number with the suffix R is presented. In the case where an interpretation is corrected by Errata, the original interpretation number with the suffix E is used. ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not "approve," "certify," "rate," or "endorse" any item, construction, proprietary device, or activity. The interpretations will be issued twice a year up to the publication of the 1995 Edition. Interpretations Nos. 2 through 7 were included with the update service to the 1983 Edition and Interpretations Nos. 8 through 13 were included with the update service to the 1986 Edition. Interpretations Nos. 14 through 19 were included with the update service to the 1989 Edition. Interpretations Nos. 20 through 25 will be included with the update service to the 1992 Edition.
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INTERPRETATIONS NO. 21Replies to Technical Inquiries
January 1, 1 99 2, ~ h r o u g h un e 30, 1992
It has been agreed to publish interpretations issued by the B31 Committee concerning B31.1
as part of the update service to the Code. The interpretations have been assigned numbers in
chronological order. Each interpretation applies either to the latest Edition or Addenda at the timeof issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequent revisions
to the Code may have superseded the reply. These interpretations are not a part of the Code or the
Addenda.These replies are taken verbatim from the original letters, except for a few typographical and
editorial corrections made for the purpose of improved clarity. In some instances, a review of the
interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply
bearing the original interpretation number with the suffix R is presented. In the case where an
interpretation is corrected by Errata, the original interpretation number with the suffix E is used.
ASME procedures provide for reconsideration of these interpretations when or if additional
information is available which the inquirer believes might affect the interpretation. Further, persons
aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As
stated in the Statement of Policy in the Code documents, ASME does not "approve," "certify,"
"rate," or "endorse" any item, construction, proprietary device, or activity.
The interpretations will be issued twice a year up to the publication of the 1995 Edition.
Interpretations Nos. 2 through 7 were included with the update service to the 1983 Edition and
Interpretations Nos. 8 through 13 were included with the update service to the 1986 Edition.
Interpretations Nos. 14 through 19 were included with the update service to the 1989 Edition.Interpretations Nos. 20 through 25 will be included with the update service to the 1992 Edition.
Question (1): Does the wall thickness requirements of Para. 122.8.2(B) apply to nonsteel pipingmaterials?
Reply (1): No; however, the requirements of Para. 104.1.2 shall be met.
Question (2):(a) Does Para. 122.8.2(C) apply to piping connections at metering pumps?(b) Are metering pumps considered to be associated with a container?
Reply (2):(a) Yes.
@) No.
Interpretation: 21 4
Subject: B31.1, 104.1, Pressure Design of Components
Date Issued: March 19, 1992
File: B31-91-045
Question: Is it the intent of ASME B31.1 that if the actual tensile strength of the material isgreater than the minimum tensile strength identified in Appendix A, a proportionately greater value
for SE may be used in the "Design Pressure Calculation of Para. 104.1"?
Subject: B31.1, 114.1 and 114.2.3, Threaded Insertion 'Qpe Flow Sensors
Date Issued: June 22, 1992
File: B31-90-020
Question (1): Is the manufacturer andlor fabricator of a pipe fitting or component responsible
for providing materials, components, and workmanship compliance with B31.1?
Reply (1): Yes, if ASME B31.1 is specified as the jurisdictional Code.
Question (2): Is a threaded insertion type flow sensor governed by Paras. 114.2.3 and 114.1?
Reply (2): The threaded connection is governed by Paras. 114.1 and 114.2.3. The design and
installation of the insertion device should be adequate to withstand the effects of the fluid charac-
teristics, fluid flow, and vibration.
Question (3): If the response to Question (2) is yes, does a polypropylene insertion flow sensorwhich is retained in the service by its threaded connection meet the intents and purposes of Paras.
114.2.3 and 114.1?
Reply (3): A polypropylene insertion type flow sensor which is retained in the service by its
threaded connection can meet the intents and purposes of Paras. 114.1 and 114.2.3.
Question (4): Paragraph 122.9'states "where it is necessary" plastic materials may be used to
convey corrosive or hazardous liquids. Should this paragraph be interpreted as prohibiting the use
of thermoplastics for conveying corrosive or hazardous liquids when the use of thermoplastics is not