ASME B16 4 INTERPRETATIONS-1998 Interpretations to B16 4-1998 - Gray Iron Threaded Fittings - Classes 125 and 250《B16 4-1998的说明 125和250级灰铁螺纹配件》.pdf

1、ASME 616.4 INTERPRETATIONS Replies to Technical Inquiries December 2,1992 through June 30,1998 INTRODUCTION As a service to persons who use the B 16 standards, the B16 Committee renders interpretations of the requirements upon request. The procedure for requesting an interpretation is described in t

2、he following paragraphs. The interpretations include all replies that have been approved by the B 16 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

3、 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 B 16 Committee will render an interpretation of any requirement of this Standard. Interpretations can only be ren

4、dered in response to a written request, which should be addressed to: Secretary, B 16 Main Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016-5990. The request for interpretation should be clear and unambiguous. It is further recommended that the inquirer

5、submit his or her request using the following format: (a) Subject. Cite the applicable paragraph number(s) andor 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 understanding and use, not a

6、s a request for an approval of a proprietary design or situation. The inquirer may also include any plans or drawings that are necesJary to explain the question; however, they should not contain proprietary names or information. Requests that are not in this format may be rewritten in this format pr

7、ior 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 information is available that the inquirer believes might affect the interpretation. Further, persons aggrieved by an inter

8、pretation may appeal to the cognizant ASME committee or subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. I ASME 816.4 Interpretations Interpretation: 1-1 Subject: ASME B16.4-1992, Para, 7(e), Angle Tolerance Requirement i

9、n Elbows Date Issued: March 14, 1995 File: B 16-94-008 Question: In ASME B16.4-1992, is there a tolerance requirement for the 90 deg or 45 deg angle in elbows? Reply: Yes. The tolerance is given in para. 7(e) as an alignment variation expressed as a slope that the user of the standard may convert to

10、 an angular variation. For further clarification, see Fig. 1-1 below. 1-1 GENERAL NOTES: (a) For illustration only; not to scale. (b) 0.06 in./ft = 0.2865 deg. FIG. 1-1 3 AMERICAN NATIONAL STANDARDS FOR PIPING. PIPE FLANGES. FITTINGS. AND VALVES Scheme for the Identification of Piping Systems .A13.

11、1.1996 Pipe Threads. General Purpose (Inch) . 61.20.1-1983(R1992) Dryseal Pipe Threads (Inch) 61.20.3-1976(R1991) Cast Iron Pipe Flanges and Flanged Fittings: Classes 25. 125. and 250 .616. 1.1998 Malleable Iron Threaded Fittings: Classes 150 and 300 .616. 3.1998 Gray Iron Threaded Fittings: Classes

12、 125 and 250 .B16. 4.1998 Pipe Flanges and Flanged Fittings (NPS Through NPS 24) .616. 5.1996 Factory-Made Wrought Steel Buttwelding Fittings .616. 9.1993 Face-to-Face and End-to-End Dimensions of Valves . .616.1 0.1992 Forged Fittings. Socket-Welding and Threaded .616.1 1.1996 CastlronThreaded Drai

13、nageFittings . 616.12-1998 Ferrous Pipe Plugs. Bushings. and Locknuts with Pipe Threads . .616.1 4.1991 Cast Bronze Threaded Fittings: Classes 125 and 250 .816.1 5.1985(R1994) Cast Copper Alloy Solder Joint Pressure Fittings . .616.1 8.1984(R1994) Metallic Gaskets for Pipe Flanges: Ring.Joint. Spira

14、l.Wound. and Jacketed . .616.2 0.1998 Nonmetallic Flat Gaskets for Pipe Flanges .616.2 1.1992 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings . .616.2 2.1995 Cast Copper Alloy Solder Joint Drainage Fittings - DWV .616.2 3.1992 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Class

15、es 150.300.400. 600.900. 1500. and 2500 . .616.2 4.1991(R1998) Buttwelding Ends . 616.25-1997 Cast Copper Alloy Fittings for Flared Copper Tubes . .616.2 6.1988 Wrought Steel Buttwelding Short Radius Elbows and Returns .616.2 8.1994 Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fitti

16、ngs - DWV .B16.2 9.1994 Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 125 psig (Sites l/z Through 2) . .616.3 3.1990 Valves - Flanged. Threaded. and Welding End . .616.3 4.1996 Orifice Flanges . 616.36-1996 Large Metallic Valves for Gas Distribution (Manually Operated. NP

17、S 2/2 to 12. 125 psig Maximum) . .616.3 8.1985(R1994) Malleable Iron Threaded Pipe Unions .B16.3 9.1998 Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems . .616.4 0.1985(R1994) Ductile Iron Pipe Flanges and Flanged Fittings. Classes 150 and 300 .616.4 2.1998 Manuall

18、y Operated Metallic Gas Valves for Use in House Piping Systems . .B16.44 .1995 Cast Iron Fittings for Sovent Drainage Systems .B16.4 5.1998 Large Diameter Steel Flanges (NPS 26 Through NPS 60) . ,816.47-1996 Steel Line Blanks . 616.48-1997 Power Piping l. 1-1995 Fuel Gas Piping (not an ANSI standard

19、) . .631. 2.1968 Process Piping B31 . 3-1999 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids ,631.4-1992 Refrigeration Piping 631.5-1992 Gas Transmission and Distribution Piping Systems . ,631.8-1995 Building ServicesPiping 631.9-1996 Slurry Transportation Piping Systems .B

20、31.1 1.1989 Manual for Determining the Remaining Strength of Corroded Pipelines . B31G-1991 Welded and Seamless Wrought Steel Pipe . .B36.10 “1996 StainlessSteel Pipe 636.19M-i985(R1994) Self-operated and Power-Operated Safety-Related Valves Functional Specification Standard., .N278. 1.1975(R1992) T

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