1、INTERPRETATIONS TO ASME BI 6.9 (These interpretations are not part of ASME B1 6.9-1993 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 i
2、nterpretation is described in the follow- ing 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
3、of issuance of the 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.
4、 Interpretations 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 unambi
5、guous. It is further recommended that the inquiqer submit his request using the following format: (a) 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 suit
6、able for general 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
7、 this format may 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 informa- tion is available which the inquirer believes might affect the inte
8、rpretation. Further, 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 device, or activity. 41 ASME BLb.9 93 W 0759b70 0533565 774 W B1 6.9 Interpretations No
9、. 1 1-1, 1-2 INTERPRETATIONS NO. 1 Replies to Technical Inquiries Issued From January 1, 1986 Through October 31, 1992 Interpretation: 1-1 Subject: Paragraph 1.2, Scope Date Issued: February 19, 1986 File: B16-85-019 Question: Are straight cone taper and step reducers included in the scope of ANSI B
10、16.9-1978? Reply: Yes. See para. 1.2 of the Standard. Interpretation: 1-2 Subject: Paragraph 1.3, Scope Date Issued: April 8, 1987 File: B 16-86-005 Question: Do fabricated fittings employing intersection welds fall within the scope of ASME/ ANSI B16.9-1986? Reply: No. See para. 1.3. 43 ASME BLb.9 9
11、3 0759b70 05315bb bOO 1-3, 1-4 B16.9 Interpretations No. 1 Interpretation: 1-3 Subject: Paragraph l. 1, “Factory-Made” Date Issued: June 10, 1987 File: B 16-87-002 Question (1): What is the definition or intended meaning of the term “factory-made” as used in ANSI B16.9-1978, Section 1, Scope, para.
12、1.1? Reply (1): “Factory-made” means production facilities, manufacturing methods (using tools, dies, jigs, and fixtures), and inspection procedures to a quality control system of a standard line of butt- welding fittings. Question (2): Section 1, Scope, para. 1.3 considers fabricated laterals, or o
13、ther fittings employing intersection welds, as pipe fabrications to be designed in accordance with ANSI B3 l. Is the intent of this provision to exclude fabricated fittings from the provisions of ANSI B16.9? Reply (2): Yes. Question (3): Do elbows with miter joints meet the provisions of Section 7,
14、Surface Contours, para. 7.1? Reply (3): No. Interpretation: 1-4 Subject: Inside Diameter of Fittings Date Issued: February 27, 1990 File: B16-88-002 Question: Does ANSI B16.9-1978 place any minimum dimensional requirements on the inside diameter of fittings at a position other than the welding ends?
15、 Reply: No. 44 I O O O ASME BLb.9 93 m 0759b70 053L5b7 547 m B1 6.9 Interpretations No. 1 1-5, 1-6 Interpretation: 1-5 Subject: Paragraph 9, Design Proof Test Date Issued: February 27, 1990 File: Bl6-88-003 Question (1): Does para. 9 of ASME/ANSI B16.9-1986 require you to use the nominal wall thick-
16、 ness of the pipe that the test fitting marking identifies when calculating the burst pressure “P”? Reply (1): Yes. Question (2): Is the actual wall thickness of the pipe used in the test required to be greater than the nominal wall thickness of the pipe that the fitting marking identifies? Reply (2
17、): ASME/ANSI B16.9-1986 does not address the requirements for the wall thickness of the pipe used in the test. Interpretation: 1-6 Subject: Table A 1, Tolerances Date Issued: February 27, 1990 File: B 16-88-004 Question: Does a NPS 30 buttweld long radius elbow that has an out-of-roundness value of
18、10 mm (major outside diameter 814 mm and a minor outside diameter of 804 mm) meet the dimensional tolerance requirements of ASME/ANSI B16.9-1986, Table Al? % Reply: No. The O.D. of a NPS 32 long radius elbow has a nominal outside diameter at the weld bevel of 813 mm with a + 7 mm, - 5 mm tolerance a
19、nd an out-of-roundness tolerance of 12 mm. The minor outside diameter of the fitting is out of tolerance. 45 ASME BLb-9 93 m 0759b70 053L5b8 Y83 m 1-7, 1-8 Interpretation: 1-7 Subject: Table 2 Dimensions of 45 O Elbows Date Issued: February 27, 1990 File: B16-88-006 B16.9 Interpretations No. 1 Quest
20、ion: Does ASME/ANSI B16.9-1986 require dimensions on 45 O elbows that would permit two (2) to be welded in series and meet the dimensional requirements of the corresponding size 90“ elbow? Reply: No. Interpretation: 1-8 Subject: Paragraph 9.3.5, Proof Tests Date Issued: February 27, 1990 File: B 16-
21、88-008 Question: Are fittings made to ASME/ANSI B16.9-1986, that were designed by successful proof tests which fulfilled the requirements of earlier editions of B16.9, considered as fulfilling the require- ments of the 1986 edition? O Reply: Yes, provided the test data has been reviewed and meets th
22、e B16.9-1986 requirements. f 46 ASME BLb.9 93 W 0759670 05315b9 3LT W B1 6.9 Interpretations No. 1 1-9, 1-10 Interpretation: 1-9 Subject: Tolerances in Parallelism Date Issued: May 10, 1990 File: B1 6-90-003 Question: Do Table 7 and/or Table 1 of ASME/ANSI B16.9-1986 have a tolerance on parallelism
23、between face and backface of the lap of a Lap Joint Stub End? Reply: No. Interpretation: 1-1 O Subject: Paragraph 11.2, Dimensions Date Issued: May 10, 1990 File: B 16-90-004 Question: Do the provisions of para. 11.2, ANSI B16.9-1978, prohibit the use of vernier, mi- crometer, electronic read-out eq
24、uipment, etc. for the determination of actual dimensions of B16.9 fittings? Reply: No. 1-11,l-12 ASME 636-9 93 m 0759b70 0533570 O33 m B16.9 Interpretations No. 1 Interpretation: 1 - 1 1 Subject: Design Proof Test Date Issued: August 8, 1990 File: B 16-90-008 Question: Does ASME/ANSI B16.9-1986 cove
25、r Design Proof Test requirements for branch fit- tings (other than tees or crosses covered in Tables 5 and 6) in which reinforcement considerations must be analyzed? Reply: No. Interpretation: 1-1 2 Subject: Paragraph 9.2.3, Design Proof Test Date Issued: June 27, 1990 File: B16-90-014 Question: Wha
26、t value of “S” shall be used in the formulae for P (Adj) (adjusted proof test pres- sure, psig) and P (computed bursting pressure of pipe which the fittings marking identifies, psig) pre- sented in para. 9.2.3, ANSI B16.9-1978? Reply: The value of “S” is the same for both equations as follows: S = M
27、inimum specified tensile strength of the pipe which the fittings marking identifies, psi. 48 B1 6.9 Interpretations No. 1 1-13, 1-14 Interpretation: 1-1 3 Subject: Tolerances Date Issued: January 23, 1991 File: B 16-90-028 Question (1): According to ASMEIANSI B16.9-1986, must all inside diameter, ou
28、tside diameter, and wall thickness tolerances (see Tables 1 and Al) be met for each fitting? Reply (1): Yes. Question (2): Is there any precedence under which the tolerance must be applied? Reply (2): No. Question (3): In ASME/ANSI B16.9-1986, is there a maximum tolerance on wall thickness? Reply (3
29、): No. Interpretation: 1 - 1 4 Subject: Taper Boring Date Issued: January 23, 1991 File: B 16-90-029 Question (1): According to ASME/ANSI B16.9-1986, when a B16.9 fitting dimension is short- ened due to taper boring, what tolerances apply? Reply (1): Those in Table 1, Tolerances. See also para. 1.3.
30、 Question (2): According to ASME/ANSI B16.28-1986, when a B16.28 fitting dimension is short- ened due to taper boring, what tolerances apply? Reply (2): Those in Table 1, Tolerances. 49 1-15, 1-16 Interpretation: 1-1 5 Subject: Table Al , Tolerances Date Issued: January 24, 1991 File: B16-90-019 Que
31、stion: Does Table Al , ASME/ANSI B16.9-1986, specify tolerances for inside diameter out- of-roundness? Reply: No. Interpretation: 1-1 6 Subject: Clarification of Long Radius Elbow Date Issued: January 25, 1991 File: B 16-90-027 Question: Does ASME/ANSI B16.9-1986, for 90 O long radius elbows, requir
32、e the openings to be joined by circular arcs on the external surfaces? 50 Reply: Yes, but the circular arcs may be terminated in tangents. See ASME/ANSI B16.9-1986, Section 7, Surface Contours. ASME BLb.7 73 M 0759b70 0533573 840 M 616.9 Interpretations No. 1 Interpretation: 1-1 7 Subject: Paragraph
33、 9.2.2, Other Components Date Issued: February 19, 1991 File: B 16-90-03 1 1-17, 1-18 Question: Is the actual wall thickness or the pipe material used in the Design Proof Test Assembly described in ASME/ANSI B16.9-1986 in para. 9.2.2 limited to the nominal wall thickness or compati- ble pipe materia
34、l that the fitting marking identifies? Reply: No. Interpretation: 1-1 8 Subject: Proof Testing of Fittings Date Issued: September 19, 1991 File: B 16-90-01 1 Question: Can successful proof pressure test data of an ASME/ANSI B16.9-1986 fitting such as a tee be applied to qualify a non-similar B16.9 f
35、itting such as an elbow? Reply: No. Test data may only be applied to qualify fittings similar to the test fittings as outlined in Section 9.4, ASMEIANSI B16.9-1986. 51 ASME BLb-9 93 m 0759670 053357q 787 D 1-19, 1-20 B1 6.9 Interpretations No. 1 Interpretation: 1-1 9 Subject: Wall Thickness Limitati
36、ons for Fittings Date Issued: September 19, 1991 File: B16-91-012 Question: Does ASMWANSI B16.9-1986 have any restrictions on the maximum wall thickness used for B16.9 fitting construction? Reply: No, provided the ends are prepared to match the customers pipe within the tolerances specified in Table
37、 l. Interpretation: 1-20 Subject: Table 9, Straight Cone Taper Reducers Date Issued: April 2, 1992 File: B16-91-013 Question: Are straight cone taper reducers included in the scope of ASME/ANSI B16.9-1986? Reply: Yes, however the welding end preparations described in ASME/ANSI B16.9, Section 8 shall
38、 be met. The referencing Code may have additional requirements. 52 ASME BLb-9 93 m 0757670 0533575 bL3 m 616.9 Interpretations No. 1 1-21, 1-22 Interpretation: 1-21 Subject: Table 1 , Tolerances Date Issued: July 31, 1992 File: B1 6-92-006 Question: Do the inside, outside diameters, and minimum wall
39、 thickness tolerances of B16.9- 1978, Table 1 apply throughout the fitting? O Reply: Table 1 tolerances for the I.D. and O.D. dimensions apply at the ends of the fitting. The wall thickness tolerance applies throughout the fitting. Interpretation: 1-22 Subject: Test Procedures Date Issued: August 19
40、, 1992 I File: B 1 6-92-0 14 O Question: When calculating the adjusted proof test pressure P, per ASME/ANSI B16.9-1986, para. 9.3, for a filler metal added welded test fitting, can a welded tensile test specimen, representative of the test fitting, be used in determining the actual tensile strength
41、of the test fitting material S,? Reply: Yes, provided the tensile specimen and tensile strength meet the applicable material re- quirements of para. 5.0. 53 AMERICAN NATIONAL STANDARDS FOR PIPING. PIPE FLANGES. FITTINGS. AND VALVES Scheme for the Identification of Piping Systems A13.1-1981(R1985) Pi
42、pe Threads. General Purpose (Inch) 81.20.1-1983(R1992) Dryseal Pipe Threads (Inch) 81.20.3-1976(R1991) Cast Iron Pipe Flanges and Flanged Fittings . 816.1-1989 Malleable Iron Threaded Fittings . 816.3-1992 Gray Iron Threaded Fittings 816.4-1992 Pipe Flanges and Flanged Fittings 816.5-1988 Factory-Ma
43、de Wrought Steel Bumelding Fittings . B16.9-1993 Face-to-Face and End-to-End Dimensions of Valves 816.10-1992 Forged Fittings. Socket-Welding and Threaded . 816.1 1-1991 Cast Iron Threaded Drainage Fittings 816.12-1991 Ferrous Pipe Plugs. Bushings. and Locknuts with Pipe Threads 816.14-1991 Cast Bro
44、nze Threaded Fittings. Class 125 and 250 816.15-1985 Cast Copper Alloy Solder Joint Pressure Fittings . B16.18-1984 Ring-Joint Gaskets and Grooves for Steel Pipe Flanges . B16.20-1973 Nonmetallic Flat Gaskets for Pipe Flanges . 816.21-1992 Wrought Copper and Copper Alloy Solder Joint Pressure Fittin
45、gs . 616.22-1989 Cast Copper Alloy Solder Joint Drainage Fittings - . DWV . 816.23-1992 Cast Copper Alloy Pipe Flanges and Flanged Fittings. Class 150.300.400. 600. 900. 1500. and 2500 816.24-1991 Buttwelding Ends 816.25-1992 Cast Copper Alloy Fittings for Flared Copper Tubes 816.26-1988 Wrought Ste
46、el Buttwelding Short Radius Elbows and Returns . 816.28-1986 Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings - DWV 816.29-1986 Cast Copper Alloy Solder Joint Fittings for Sovent Drainage Systems 816.32-1992 Manually Operated Metallic Gas Valves for Use in Gas Piping Systems Up
47、 to 125 psig (Sizes Through 2) . 816.33-1990 Valves - Flanged. Threaded. and Welding End 816.34-1988 Orifice Flanges 816.36-1988 Malleable Iron Threaded Pipe Unions. Classes 150. 250. and 300 816.39-1986 Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems . 816.40-198
48、5 Functional Qualification Requirements for Power Operated Active Valve Assemblies for Nuclear Power Plants 816.41-1983(R1989) Ductile Iron Pipe Flanges and Flanged Fittings. Class 150 and 300 . 816.42-1987 Wrought Copper and Copper Alloy Solder Joint Fittings for Sovent Drainage Systems . 816.43-19
49、82 Cast Iron Fittings for Sovent Drainage Systems . 816.45-1987 Large Diameter Steel Flanges (NPS 26 Through NPS 60) 816.47-1990 Power Piping . 831.1-1992 Fuel Gas Piping 831.2-1968 Chemical Plant and Petroleum Refinery Piping 831.3-1993 Liquid Transportation Systems for Hydrocarbons. Liquid Petroleum Gas. Anhydrous Ammonia. and Alcohols 831.4-1992 Refrigeration Piping . B31.5-1992 Gas Transmission and Distribution Piping Systems 831.8-1992 Building Services Piping . 831.9-1988 Slurry Transportation Piping Systems . 831.1 1-1989 ASME Guide for Gas Transmission and Distribution Piping Sys
