1、ASME B16.25 INTERPRETATIONS NO. 3Replies to Technical InquiriesJanuary 1, 1997 through December 31, 2003FOREWORDThe publication includes all of the written replies issued between the indicated dates by theSecretary, speaking for the ASME B16 Committee, Standardization of Valves, Flanges, Fittings,Ga
2、skets, and Valve Actuators, to inquiries concerning interpretations of technical aspects ofB16.25, Buttwelding Ends.These replies are taken verbatim from the original letters except for a few typographicalcorrections and some minor editorial corrections made for the purpose of improved clarity. Inso
3、me few instances, a review of interpretation revealed a need for corrections of a technicalnature; in these cases, a corrected interpretation follows immediately after the original reply.These interpretations were prepared in accordance with the accredited ASME procedures.ASME procedures provide for
4、 reconsideration of these interpretations when or if additionalinformation is available which the inquirer believes might affect the interpretation. Further,persons aggrieved by this interpretation may appeal to the cognizant ASME Committee orSubcommittee. ASME does not “approve,” “certify,” “rate,”
5、 or “endorse” any item, construction,proprietary device, or activity.I-1ASME B16.25-2003 3-1Interpretation: 3-1Subject: ASME B16.25-1997, Table 1, Note (2)Date Issued: September 19, 2001File: B16-01-006Question: According to ASME B16.25-1997, Table 1, Note (2), may diameters other than thoselisted i
6、n Table 1, column 4, be used for cast steel valves?Reply: Yes. The minimum thickness of the welding end required by the applicable standardor specification needs to be considered. See para. 5.4.I-2ASME B16.25 INTERPRETATIONS Replies to Technical Inquiries November 31, 1992, through December 31, 1996
7、 INTRODUCTION As a service to persons who use the B 16 standards, the BI 6 Committee renders interpretations of the requirements upon request. The procedure for requesting an interpretation is described in the following paragraphs. The interpretations include all replies which have been approved by
8、the B16 Main Committee in response to inquiries concerning interpretation of this Standard. An interpretation applies either to the Edition and Addenda in effect on the date of issuance of the interpretation or the Edition and Addenda stated in the interpretation. Subsequent revisions to this Standa
9、rd may supersede the interpretation. These interpretations are not a part of ASME B16.25 or its addenda. PROCEDURE FOR REQUESTING INTERPRETATIONS On request, the BI6 Committee will render an interpretation of any requirement of this Standard. Interpretations can only be rendered in response to a wri
10、tten request, which should be addressed to: Secretary, B 16 Main Committee The American Society of Mechanical Engineers United Engineering Center 345 East 47th Street New York, NY 10017 The request for interpretation should be clear and unambiguous. It is further recommended that the (a) Subject. Ci
11、te the applicable paragraph number(s) and/or give a concise description of the subject. (6) Question. Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. Th
12、e inquirer may also include any plans or drawings which are necessary to explain the question; however, they should not contain proprietary names or information. Requests which are not in this format may be rewritten in this format prior to being answered, which may inadvertently change the original
13、 intent of the request. ASME procedures provide for reconsideration of an interpretation 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 subcommit
14、tee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. inquirer submit his request using the following format: 5 STD-ASME BLb.25 INT-ENGL L77b 0759b70 0580707 310 ASME B16.25 Interpretations No. 2 2-1, 2-2 Interpretation: 2-1 Subject: I
15、nternal Transition of Buttwelded Pipe Date Issued: September 27, 1993 File: B 16-93-0 12 Question: Are the requirements for the internal transition of a 4 in. Schedule 40 pipe when, buttwelded to 4 in. Schedule 10 pipe using a gas tungsten arc welding (GTAW) root pass procedure covered by ASME B 16.
16、25-1 992? Reply: No. See Section 2. Interpretation: 2-2 Subject: Counterbore End Preparations Date Issued: August 24, 1995 File: B 16-95-002 Question: When providing counterbore end preparations in accordance with ASME B16.25-1992, Fig. 2, 3, 5, or 6, is it necessary to have a tapered transition in
17、the inside diameter within the 2tmi, transition region as long as the provided slope or alternate radius does not break the solid 1:3 maximum slope line? Reply: No. Figure 1 allows any slope to be used in the 2tmin transition region. 7 ASME BLb.25 92 W 0757670 0527778 38b W e e O O 0 INTERPRETATIONS
18、 TO ASME 916.25 (These interpretations are not part of ASME 616.25-1992 and are included for information only.) INTRODUCTION As a service to persons who use the B16 standards, the B16 Committee renders interpretations of the requirements upon request. The procedure for requesting an interpretation i
19、s described in the following paragraphs. The interpretations include all replies which have been approved by the B16 Main Committee in response to inquiries concerning interpretation of this Standard. An interpretation applies either to the Edition and Addenda in effect on the date of issuance of th
20、e interpretation or the Edition and Addenda stated in the interpretation. Subsequent revisions to this Standard may supersede the interpretation. PROCEDURE FOR REQUESTING INTERPRETATIONS On request, the B16 Committee will render an interpretation of any requirement of this Standard. Interpretations
21、can only be rendered in response to a written request, which should be addressed to: Secretary, B16 Main Committee The American Society of Mechanical Engineers United Engineering Center 345 East 47th Street New York, NY 10017 The request for interpretation should be clear and unambiguous. It is furt
22、her recommended that the inquirer submit his request using the following format: (u) Subject. Cite the applicable paragraph number(s) and/or give a concise description of the subject. (b) Question. Phrase the question as a request for an interpretation of a specific requirement suitable for general
23、understanding and use, not as a request for an approval of a proprietary design or situation. The inquirer may also include any plans or drawings which are necessary to explain the question; however, they should not contain proprietary names or information. Requests which are not in this format may
24、be rewritten in this format prior to being answered, which may inadvertently change the original intent of the request. ASME procedures provide for reconsideration of an interpretation when or if additional infor- mation is available which the inquirer believes might affect the interpretation. Furth
25、er, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary de- vice, or activity. 19 INTERPRETATIONS NO. 1 Replies to Technical Inquiries Issued from January 1, 19
26、87, through November 30, 1992 Interpretation: 1-1 Subject: Finish of Buttwelding Ends Date Issued: April 19, 1991 File: B16-91-005 Question (l)? Do all buttwelding ends conforming to or partially machined finish to achieve final dimensions? ASME/ANSI B16.25-1986 require a total Reply (1): No. Question (2): Is an as-cast finish of buttwelding ends conforming to Figure 2(a), ASME/ANSI B16.25-1986, including dimensions and tolerances, acceptable? Reply (2): Yes. 1-1 21
