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Transcription

1 Buttwelding Ends

2 CONTENTS Foreword... iv Committee Roster... v Correspondence With the B16 Committee... vi Summary of Changes... vii 1 Scope Transition Contours Welding Bevel Design Preparation of Inside Diameter of Welding End Tolerances... 3 Figures 1 Maximum Envelope for Welding End Transitions Bevels for Wall Thickness Over 3 mm (0.12 in.) to 22 mm (0.88 in.), Inclusive Weld Bevel Details for Wall Thickness Over 22 mm (0.88 in.) Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 3 mm (0.12 in.) to 10 mm (0.38 in.), Inclusive] Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 10 mm (0.38 in.) to 25 mm (1.0 in.), Inclusive] Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 25 mm (1.0 in.)]... 8 Table 1 Dimensions of Welding Ends... 9 Mandatory Appendices I Inch Table II References Nonmandatory Appendix A Quality System Program... 19

3 BUTTWELDING ENDS 1 SCOPE 1.1 General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and tolerances). Coverage includes preparation for joints with the following: (a) no backing rings (b) split or noncontinuous backing rings (c) solid or continuous backing rings (d) consumable insert rings (e) gas tungsten arc welding (GTAW) of the root pass Details of preparation for any backing ring must be specified when ordering the component. 1.2 Application This Standard applies to any metallic materials for which a welding procedure can be satisfactorily qualified but does not prescribe specific welding processes or procedures. Unless otherwise specified by the purchaser, it does not apply to welding ends conforming to ASME B16.5, B16.9, or B Relevant Units This Standard states values in both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses or in a separate table that appears in Mandatory Appendix I. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard. 1.4 Size Nominal pipe size (NPS), followed by a dimensionless number, is the designation for nominal fitting size. NPS is related to the reference nominal diameter (DN) used in international standards. The relationship is typically as follows: NPS DN For NPS 4, the related DN p 25 NPS. 1.5 Referenced Standards Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix II. A product made in conformance with a prior edition of referenced standards will be considered to be in conformance, even though the edition reference may be changed in a subsequent revision of the standard. 1.6 Quality Systems Nonmandatory requirements relating to the manufacturer s quality system program are described in Nonmandatory Appendix A. 1.7 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) are specified shall be as defined in ASTM E29. This requires that an observed or calculated value be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of measurement. 2 TRANSITION CONTOURS Figure 1 delineates the maximum envelope in which transitions from welding bevel to the outer surface of the component and from the root face to the inner surface of the component must lie. Except as specified in Note (5) to Fig. 1, and as otherwise specified by the purchaser, the exact contour within this envelope is the manufacturer s option, provided it maintains the specified minimum

4 wall thickness, has no slopes steeper than those indicated for the respective regions, and includes the proper surface for backing rings if specified. 3 WELDING BEVEL DESIGN 3.1 Bevels for Other Than GTAW Root Pass (a) Components having nominal wall thicknesses of 3 mm (0.12 in.) and less shall have ends cut square or slightly chamfered. (b) Components having nominal wall thicknesses over 3 mm (0.12 in.) to 22 mm (0.88 in.) inclusive shall have single angle bevels as illustrated in Fig. 2. (c) Components having nominal wall thicknesses greater than 22 mm (0.88 in.) shall have compound angle bevels as illustrated in Fig Bevels for GTAW Root Pass (a) Components having nominal wall thicknesses of 3 mm (0.12 in.) and less shall have ends cut square or slightly chamfered. (b) Components having nominal wall thicknesses over 3 mm (0.12 in.) to 10 mm (0.38 in.) inclusive shall have deg ± deg bevels or slightly concave bevels (see Fig. 4). (c) Components having nominal wall thicknesses over 10 mm (0.38 in.) to 25 mm (1.0 in.) inclusive shall have bevels as shown in Fig. 5. (d) Components having nominal wall thicknesses greater than 25 mm (1.0 in.) shall have bevels as shown in Fig Outside Diameter at Welding Ends Dimension A shall be either that specified in the applicable component standard or that specified in the purchaser s component specification. In the absence of a requirement for dimension A in a component standard or a purchaser s specification, the values for dimension A in Table 1 or Table I-1 may be used. 4 PREPARATION OF INSIDE DIAMETER OF WELDING END 4.1 General Preparation of the inside diameter at the end of a component shall be in accordance with one of the following, as specified by the purchaser: (a) Components to be welded without backing rings shall meet the requirements of the standard or specification for the component. (b) Components to be welded using split or noncontinuous backing rings shall be contoured with a cylindrical surface at the end as shown in Fig. 2, illustration (b) and Fig. 3, illustration (b). If the backing ring contour is other than rectangular, details must be furnished by the purchaser. (c) Components to be welded using solid or continuous backing rings shall be contoured with a cylindrical or tapered surface at the end as specified by the purchaser. End preparation is illustrated in Fig. 2, illustration (c) and Fig. 3, illustration (c) for rectangular ends and in Fig. 2, illustration (d) and Fig. 3, illustration (d) for tapered ends. (d) Components to be welded using consumable insert rings or GTAW root pass shall be contoured with a cylindrical surface at the end as shown in Figs. 4 through Dimension C Values for dimension C shown in Fig. 2, illustrations (c) and (d); Fig. 3, illustrations (c) and (d); and Figs. 5 and 6 can be determined by the following equations: (SI Units) C p A O.D. tolerance 2 t min 0.25 (1) (U.S. Customary Units) C p A O.D. tolerance 2 t min (2) where A p specified outside pipe diameter at welding end (see para. 3.3) O.D. tolerance p undertolerance on the pipe O.D. from the applicable piping specification t min p t manufacturing tolerance for pipe wall thickness per applicable pipe specification, mm (in.) t p nominal wall thickness of pipe, mm (in.) 0.25 (0.010) p plus machining tolerance on Bore C, mm (in.) Based on tolerances specific to ASTM A106 and A335 pipe, including an undertolerance on wall thickness of 12.5%, eqs. (1) and (2) can be defined as follows: (SI Units) (U.S. Customary Units) C p A t 0.25 C p A t Tables 1 and I-1 list the C values for pipe with an undertolerance of 12.5% on wall thickness, including ASTM A106 and A335 pipe, in sizes NPS 2½ through NPS 48. For pipe with a pipe wall thickness undertolerance other than 12.5%, do not use the C data from Tables 1 and I-1 [see para. 4.3(a)]. 4.3 Exceptions (a) For pipe or tubing varying from the ASTM A106 and A335 types, having different wall thickness and/or 2

5 outside diameter tolerances (such as forged and bored pipe), the foregoing equations may be inapplicable. Equations (1) and (2) may be used to determine C for these applications. The purchaser shall specify the C dimension when Tables 1 and I-1 data do not apply. (b) For components in smaller sizes and lower schedule numbers, it may be necessary to deposit weld metal on the inside diameter (I.D.) or use thicker wall materials in order to machine the backing ring while maintaining required wall thickness. This condition may also arise when using material whose nominal dimensions indicate sufficient metal but whose actual I.D., considering tolerances, is large enough to require additional metal. 5 TOLERANCES (See Figs. 2, 3, 5, and 6) 5.1 Dimension B Values for the I.D. at the welding end [see dimension B, Fig. 2, illustrations (a) and (b) and Fig. 3, illustrations (a) and (b)] shall be as specified in the applicable standard or specification for the component. 5.2 Welding Bevels, Root Face, and Dimension C Values of welding bevels, root face, and dimension C shall be as indicated in Figs. 2 through 6. Large diameter pipe and fittings with a relatively thin wall have a tendency to spring out-of-round after removal from the machining fixture. For this reason, the measured diameters may vary with orientation. A tolerance of mm ( in.) applies to the average C diameter in Figs. 2 and 3, illustrations (c) and (d). A tolerance of mm, 1.02 mm ( in., in.) applies to the average C diameter for Figs. 5 and Dimension A Unless otherwise specified, the tolerances for dimension A shall be as follows: Size NPS 5 NPS Wall Thickness Tolerance +2.5 mm, 0.79 mm (+0.10 in., in.) +4.0 mm, 0.79 mm (+0.16 in., in.) The maximum thickness, t max, at the end of the component is (a) greater of t min + 4 mm (0.16 in.) or 1.15t min when ordered on a minimum wall basis (b) greater of t min + 4 mm (0.16 in.) or 1.10t nom when ordered on a nominal wall basis (see Fig. 1) The minimum thickness, t min, shall be as specified in the applicable standard or specification for the component (see Figs. 2, 3, 5, and 6). 3

6 Outside Note (1) Outside t min 2 Fig. 1 Maximum Envelope for Welding End Transitions 1.5t min Radius 0.05t min 45 deg max. Radius 0.05t min Note (2) Note (3) Component or Fitting t nom t min Maximum [Note (4)] Minimum 1.0t min Inside Note (1) Radius Maximum slope 1:3 0.05t min Note (5) Inside 2t min transition region NOTES: (1) Where transitions using maximum slope do not intersect inside or outside surface, as shown by phantom outlines, maximum slopes shown or alternate radii shall be used. (2) Weld bevel shown is for illustration only. (3) The weld reinforcement permitted by applicable code may lie outside the maximum envelope. (4) The maximum thickness at the end of the components is (a) the greater of t min + 4 mm (0.16 in.) or 1.15t min when ordered on a minimum wall basis (b) the greater of t min + 4 mm (0.16 in.) or 1.10t nom when ordered on a nominal wall basis (5) The value of t min is whichever of the following is applicable: (a) the minimum ordered wall thickness of the pipe to include pipe that is purchased to a nominal wall thickness with an undertolerance other than 12.5% (b) times the nominal wall thickness of pipe ordered to a pipe schedule wall thickness that has an undertolerance of 12.5% (c) the minimum ordered wall thickness of the cylindrical welding end of a component or fitting (or the thinner of the two) when the joint is between two components 4

7 Fig. 2 Bevels for Wall Thickness Over 3 mm (0.12 in.) to 22 mm (0.88 in.), Inclusive 37.5 deg ± 2.5 deg 37.5 deg ± 2.5 deg Note (1) 1.6 ± 0.8 (0.06 ± 0.03) Note (2) 1.6 ± 0.8 (0.06 ± 0.03) B A 13 (0.5) min. B A (a) Welding End Detail for Joint Without Backing Ring (b) Welding End Detail for Joint Using Split Rectangular Backing Ring 37.5 deg ± 2.5 deg 37.5 deg ± 2.5 deg Note (2) 1.6 ± 0.8 (0.06 ± 0.03) A 10 deg Note (2) 1.6 ± 0.8 (0.06 ± 0.03) A 13 (0.5) min. C +0.25, 0 (+0.010, 0) 6 (0.22) min. C +0.25, 0 (+0.010, 0) (c) Welding End Detail for Joint Using Continuous Rectangular Backing Ring (d) Welding End Detail for Joint Using Continuous Tapered Backing Ring GENERAL NOTES: (a) Broken lines denote maximum envelope for transitions from welding bevel and root face into body of component. See Fig. 1 for details. (b) See section 5 for tolerances other than those given in these illustrations. (c) Purchase order must specify contour of any backing ring to be used. (d) Linear dimensions are in millimeters with inch values in parentheses. NOTES: (1) Internal surface may be as-formed or machined for dimension B at root face. Contour within the envelope shall be in accordance with section 2. (2) Intersections should be slightly rounded. 5

8 Fig. 3 Weld Bevel Details for Wall Thickness Over 22 mm (0.88 in.) 10 deg ± 2.5 deg 10 deg ± 2.5 deg 19 ± 2 (0.75 ± 0.06) Note (1) 37.5 deg ± 2.5 deg 1.6 ± 0.8 (0.06 ± 0.03) A (a) Welding End Detail for Joint Without Backing Ring B Note (2) 19 ± 2 (0.75 ± 0.06) 13 (0.5) min deg ± 2.5 deg 1.6 ± 0.8 (0.06 ± 0.03) (b) Welding End Detail for Joint Using Split Rectangular Backing Ring B A 10 deg ± 2.5 deg 10 deg ± 2.5 deg Note (2) 19 ± 2 (0.75 ± 0.06) 37.5 deg ± 2.5 deg 1.6 ± 0.8 (0.06 ± 0.03) A Note (2) 19 ± deg ± 2.5 deg (0.75 ± 0.06) 1.6 ± 0.8 (0.06 ± 0.03) 10 deg A 13 (0.5) min. C 0.25, 0 ( 0.010, 0) 6 (0.22) min. C 0.25, 0 ( 0.010, 0) (c) Welding End Detail for Joint Using Continuous Rectangular Backing Ring (d) Welding End Detail for Joint Using Continuous Tapered Backing Ring GENERAL NOTES: (a) Broken lines denote maximum envelope for transitions from welding bevel and root face into body of component. See Fig. 1 for details. (b) See section 5 for tolerances other than those given in these illustrations. (c) Purchase order must specify contour of any backing ring to be used. (d) Linear dimensions are in millimeters with inch values in parentheses. NOTES: (1) Internal surface may be as-formed or machined for dimension B at root face. Contour within the envelope shall be in accordance with section 2. (2) Intersections should be slightly rounded. 6

9 Fig. 4 Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 3 mm (0.12 in.) to 10 mm (0.38 in.), Inclusive] 37.5 deg ± 2.5 deg Alternate 1.6 ± 0.8 (0.06 ± 0.03) GENERAL NOTES: (a) This detail applies for gas tungsten arc welding (GTAW) of the root pass where nominal wall thickness is over 3 mm (0.12 in.) to 10 mm (0.38 in.), inclusive. (b) Linear dimensions are in millimeters with inch values in parentheses. Fig. 5 Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 10 mm (0.38 in.) to 25 mm (1.0 in.), Inclusive] 20 deg ± 2.5 deg 20 deg ± 2.5 deg 3 (0.12) 0 to 2 (0.06) Note (1) 2 ± 0.4 (0.078 ± 0.016) A Note (1) 5 (0.19) R 2 ± 0.4 A (0.078 ± 0.016) 5 (0.19) min. C 0.25, 1.02 ( 0.010, 0.040) 5 (0.19) min. C 0.25, 1.02 ( 0.010, 0.040) Type A Type B GENERAL NOTES: (a) This detail applies for gas tungsten arc welding (GTAW) of the root pass where nominal wall thickness is over 10 mm (0.38 in.) to 25 mm (1.0 in.), inclusive. (b) Broken lines denote maximum envelope for transitions from welding groove and land into body of component. See Fig. 1 for details. (c) See section 5 for tolerances other than those given in these illustrations. (d) Linear dimensions are in millimeters with inch values in parentheses. NOTE: (1) Inside corners should be slightly rounded. 7

10 Fig. 6 Weld Bevel Details for GTAW Root Pass [Wall Thickness Over 25 mm (1.0 in.)] 10 deg ± 2.5 deg 10 deg ± 2.5 deg 3 (0.12) 0 to 2 (0.06) 20 deg ± 2.5 deg 19 to 25 (0.75 to 1.00) Note (1) 2 ± 0.4 (0.078 ± 0.016) A Note (1) 20 deg ± 2.5 deg 19 to 25 (0.75 to 1.00) 5 (0.19) R 2 ± 0.4 (0.078 ± 0.016) A 5 (0.19) min. C 0.25, 1.02 ( 0.010, 0.040) 5 (0.19) min. C 0.25, 1.02 ( 0.010, 0.040) Type A Type B GENERAL NOTES: (a) This detail applies for gas tungsten arc welding (GTAW) of the root pass where nominal wall thickness is greater than 25 mm (1.0 in.). (b) Broken lines denote maximum envelope for transitions from welding groove and land into body of component. See Fig. 1 for details. (c) See section 5 for tolerances other than those given in these illustrations. (d) Linear dimensions are in millimeters with inch values in parentheses. NOTE: (1) Inside corners should be slightly rounded. --`,,```,,,,````-`-`,,`, 8

11 Table 1 Dimensions of Welding Ends (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t (12) XXS XXS XXS XXS XXS XXS

12 Table 1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t 10 (Cont d) STD XS STD XS STD STD XS STD XS

13 Table 1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t 20 (Cont d) STD XS STD XS STD STD STD STD STD

14 Table 1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t STD STD XS STD XS STD XS STD XS STD XS STD XS GENERAL NOTES: (a) Dimensions are in millimeters. (b) See section 5 for tolerances. NOTES: (1) Data are from ASME B36.10M or a more precise rounding of the inch dimensions from Table I-1. Data in the table are also applicable to ASME B36.19M when the wall thickness conforms to ASME B36.10M. Letter designations signify (a) STD p standard wall thickness (b) XS p extra strong wall thickness (c) XXS p double, extra strong wall thickness (2) See para (3) Internal machining for continuous backing rings for sizes NPS 2 and smaller is not contemplated. See para. 4.2 for C dimension for sizes not listed. 12

15 MANDATORY APPENDIX I INCH TABLE This Mandatory Appendix provides a table (Table I-1) of the standard inch dimensions for fittings. 13

16 (12) Table I-1 Dimensions of Welding Ends (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t XXS XXS XXS XXS XXS XXS

17 Table I-1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t 10 (Cont d) STD XS STD XS STD STD XS STD XS

18 Table I-1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t 20 (Cont d) STD XS STD XS STD STD STD STD STD

19 Table I-1 Dimensions of Welding Ends (Cont d) (See Figs. 1 Through 6) O.D. at Welding Ends Wrought or Fabricated Nominal Schedule Components, Cast Components, Pipe Size No. A A C (NPS) [Note (1)] [Notes (1), (2)] [Note (2)] B [Note (3)] t STD STD XS STD XS STD XS STD XS STD XS STD XS GENERAL NOTES: (a) Dimensions are in inches. (b) See section 5 for tolerances. NOTES: (1) Data are from ASME B36.10M and are also applicable to ASME B36.19M data when the wall thickness conforms to ASME B36.10M. Letter designations signify (a) STD p standard wall thickness (b) XS p extra strong wall thickness (c) XXS p double, extra strong wall thickness (2) See para (3) Internal machining for continuous backing rings for sizes NPS 2 and smaller is not contemplated. See para. 4.2 for C dimension for sizes not listed. 17

20 (12) MANDATORY APPENDIX II REFERENCES The following is a list of publications referenced in this Standard. Unless otherwise specified, the latest edition of ASME publications shall apply. ASME B16.5, Pipe Flanges and Flanged Fittings ASME B16.9, Factory-Made Wrought Buttwelding Fittings ASME B16.47, Large Diameter Steel Flanges ASME B36.10M, Welded and Seamless Wrought Steel Pipe ASME B36.19M, Stainless Steel Pipe Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY ; Order Department: 22 Law Drive, P.O. Box 2900, Fairfield, NJ ( ASTM A106/A106M-11, Specification for Seamless Carbon Steel Pipe for High-Temperature Service ASTM A335/A335M-11, Specification for Seamless Ferritic Alloy Steel Pipe for High-Temperature Service ASTM E29-08, Standard Practice for Using Significant Digits in Test Data to Determine Conformance With Specifications Publisher: American Society for Testing and Materials (ASTM International), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA ( ISO , Quality management systems Fundamentals and vocabulary 1 ISO , Quality management systems Requirements 1 ISO , Quality management systems Guidelines for performance improvement 1 Publisher: International Organization for Standardization (ISO), Central Secretariat, 1 ch. de la Voie-Creuse, Case postale 56, CH-1211, Genève 20, Switzerland/Suisse ( 1 May also be obtained from American National Standards Institute (ANSI), 25 West 43rd Street, New York, NY

21 NONMANDATORY APPENDIX A QUALITY SYSTEM PROGRAM The products manufactured in accordance with this Standard shall be produced under a quality system program following the principles of an appropriate standard from the ISO 9000 series. 1 A determination of the need for registration and/or certification of the product 1 The series is also available from the American National Standards Institute (ANSI) and the American Society for Quality (ASQ) as American National Standards that are identified by the prefix Q, replacing the prefix ISO. Each standard of the series is listed under References in Mandatory Appendix II. manufacturer s quality system program by an independent organization shall be the responsibility of the manufacturer. The detailed documentation demonstrating program compliance shall be available to the purchaser at the manufacturer s facility. A written summary description of the program utilized by the product manufacturer shall be available to the purchaser upon request. The product manufacturer is defined as the entity whose name or trademark appears on the product in accordance with the marking or identification requirements of this Standard. 19

22 B16 AMERICAN NATIONAL STANDARDS FOR PIPING, PIPE FLANGES, FITTINGS, AND VALVES Gray Iron Pipe Flanges and Flanged Fittings (Classes 25, 125, and 250)... B Malleable Iron Threaded Fittings: Classes 150 and B Gray Iron Threaded Fittings: Classes 125 and B Pipe Flanges and Flanged Fittings NPS 1 2 Through NPS 24 Metric/Inch Standard...B Factory-Made Wrought Buttwelding Fittings...B Face-to-Face and End-to-End Dimensions of Valves...B Forged Fittings, Socket-Welding and Threaded...B Cast Iron Threaded Drainage Fittings...B Ferrous Pipe Plugs, Bushings, and Locknuts with Pipe Threads...B Cast Copper Alloy Threaded Fittings...B Cast Copper Alloy Solder Joint Pressure Fittings...B Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed...B Nonmetallic Flat Gaskets for Pipe Flanges...B Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings...B Cast Copper Alloy Solder Joint Drainage Fittings: DWV...B Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and B Buttwelding Ends...B Cast Copper Alloy Fittings for Flared Copper Tubes...B Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings DWV...B Manually Operated Metallic Gas Valves for Use in Gas Piping Systems Up to 125 psi (Sizes NPS 1 2 Through NPS 2)...B (R2007) Valves Flanged, Threaded, and Welding End...B Orifice Flanges...B Large Metallic Valves for Gas Distribution: Manually Operated, NPS (DN 65) to NPS 12 (DN 300), 125 psig (8.6 bar) Maximum...B Malleable Iron Threaded Pipe Unions: Classes 150, 250, and B Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems...B Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and B Manually Operated Metallic Gas Valves for Use in Aboveground Piping Systems Up to 5 psi...b Cast Iron Fittings for Sovent Drainage Systems...B (R2006) Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard...B Line Blanks...B Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and Distribution Systems...B Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings...B (R2008) Copper and Copper Alloy Press-Connect Pressure Fittings...B The ASME Publications Catalog shows a complete list of all the Standards published by the Society. For a complimentary catalog, or the latest information about our publications, call THE-ASME ( ).