ASTM F722-2018 Standard Specification for Welded Joints for Shipboard Piping Systems.pdf

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1、Designation: F722 82 (Reapproved 2014)F722 18 An American National StandardStandard Specification forWelded Joints for Shipboard Piping Systems1This standard is issued under the fixed designation F722; the number immediately following the designation indicates the year of originaladoption or, in the

2、 case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers typical details of welded joints commonly used in shipboard pipin

3、g systems. These joints and otherjoints may be used provided the welding procedures used have been qualified in accordance with the applicable regulatory rulesand regulations.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalcon

4、versions to SI units that are provided for information only and are not considered standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standard

5、s, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASME Standards:2B31.1 Power Piping2.2 Federal Standards:Code of Federal Regulations Title 46 Shipping, Parts 30 to 4023Code of Federal Regulations Title 46Shippi

6、ng, Parts 41 to 69Code of Federal Regulations Title 46 Shipping, Parts 140 to 1492Rules for Building and Classing Steel Vessels33. Application, Service, Limitations, and List of Weld Joint Details3.1 Details of welded joints, including application, service, and limitation notes, are provided in the

7、appropriate figures, asfollows:3.1.1 Butt-Welded Joints for Pipes, Valves, Fittings, and Flanges:Fig. 1 Butt Joint, SquareFig. 2 Butt Joint, V-GroovedFig. 3 Butt Joint, V-Grooved, Welded Both SidesFig. 4 Butt Joint, Double V-Grooved, Welded Both SidesFig. 5 Butt Joint, Compound Bevel V-Grooved, Weld

8、ed Both SidesFig. 6 Butt Joint, V-Grooved, Miter TypeFig. 7 Butt Joint, V-Grooved, Welded with Bevel End-Type Backing RingFig. 8 Butt Joint, Compound Bevel V-Grooved, Welded with Bevel End-Type Backing RingFig. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-Type Backing RingFig. 10 Butt Joint, V-

9、Grooved, Welded with Square End-Type Backing RingFig. 11 Butt Joint, V-Grooved, Welded with Consumable Insert RingFig. 12 Butt Joint, Compound Bevel V-Grooved, Welded with Consumable Insert Ring1 This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is

10、 the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Nov. 1, 2014Nov. 1, 2018. Published November 2014November 2018. Originally approved in 1981. Last previous edition approved in 20082014as F722 82 (2008).(2014). DOI: 10.1520/F0722-82R14.10.1520/

11、F0722-18.2 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.3 Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC

12、 20401,20401-0001,http:/www.access.gpo.gov.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, A

13、STM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Fig.

14、13 Butt Joint, U-Grooved, Welded with Consumable Insert RingFig. 14 Butt Joint, V-Grooved, Welded with Consumable Insert RingFig. 15 Butt Joint, Socket Weld to Socket Weld Valve, Fitting or Flange Welded on Pipe NippleFig. 16 Butt Joint, Transition Between Unequal Inside and Outside Diameter Compone

15、ntsFig. 1 Butt Joint, SquareFig. 2 Butt Joint, V-GroovedFig. 3 Butt Joint, V-Grooved, Welded Both SidesFig. 4 Butt Joint, Double V-Grooved, Welded Both SidesFig. 5 Butt Joint, Compound Bevel V-Grooved, Welded Both SidesFig. 6 Butt Joint, V-Grooved, Miter TypeFig. 7 Butt Joint, V-Grooved, Welded with

16、 Bevel End-Type Backing RingFig. 8 Butt Joint, Compound Bevel V-Grooved, Welded with Bevel End-Type Backing RingFig. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-Type Backing RingFig. 10 Butt Joint, V-Grooved, Welded with Square End-Type Backing RingFig. 11 Butt Joint, V-Grooved, Welded with Co

17、nsumable Insert RingFig. 12 Butt Joint, Compound Bevel V-Grooved, Welded with Consumable Insert RingFig. 13 Butt Joint, U-Grooved, Welded with Consumable Insert RingFig. 14 Butt Joint, V-Grooved, Welded with Consumable Insert RingFig. 15 Butt Joint, Socket Weld to Socket Weld Valve, Fitting or Flang

18、e Welded on Pipe NippleFig. 16 Butt Joint, Transition between Unequal Inside and Outside Diameter Components3.1.2 Fillet Welded Joints for Valves, Fittings, and Flanges:Fig. 17 Fillet Welded Sleeve-Type Pipe CouplingFig. 17 Fillet Welded Sleeve-Type Pipe CouplingFig. 18 Fillet Welded Socket Weld Fit

19、ting or ValveFig. 19 Fillet Welded Socket Weld-FlangeFig. 20 Double Fillet Welded Slip-On Flange (Forged)Fig. 21 Double Fillet Welded Slip-On Flange (Plate Type)Fig. 22 Fillet Welded Slip-On Flange (Plate Type), Single BevelFig. 18 Fillet Welded Socket Weld Fitting or ValveFig. 19 Fillet Welded Sock

20、et Weld-FlangeFig. 20 Double Fillet Welded Slip-On Flange (Forged)Fig. 21 Double Fillet Welded Slip-On Flange (Plate Type)Fig. 22 Fillet Welded Slip-On Flange (Plate Type), Single BevelF722 1823.1.3 Fabricated Joints:Fig. 23 Fillet Welded Internal Root ConnectionFig. 23 Fillet Welded Internal Root C

21、onnectionFig. 24 Fillet Welded External Root ConnectionFig. 25 Fillet Reinforced External Root Connection Single BevelFig. 26 Fillet Reinforced External Root Connection, Single Bevel, Welded Both SidesFig. 27 Fillet Reinforced External Root Connection, Single Bevel, Welded with Square End Backing Ri

22、ngFig. 28 Fillet Reinforced Internal Root Connection, Single Bevel, Welded with Square End Backing RingFig. 24 Fillet Welded External Root ConnectionFig. 25 Fillet Reinforced External Root Connection Single BevelFig. 26 Fillet Reinforced External Root Connection, Single Bevel, Welded Both SidesFig.

23、27 Fillet Reinforced External Root Connection, Single Bevel, Welded with Square End Backing RingFig. 28 Fillet Reinforced Internal Root Connection, Single Bevel, Welded with Square End Backing Ring3.1.4 Outlet and Boss Connections:Fig. 29 Fillet Reinforced Boss Connection Without Pilot, Single Bevel

24、Fig. 29 Fillet Reinforced Boss Connection Without Pilot, Single BevelFig. 30 Fillet Reinforced Boss Connection with Pilot, Single BevelFig. 31 Fillet Reinforced Boss Connection (Couplet) with Integral Backing RingFig. 32 Fillet Reinforced External Root Connection, Single Bevel with Integrally Reinfo

25、rced OutletFig. 33 Fillet Reinforced External Root Connection Welded Both Sides, Single Bevel with Integrally Reinforced OutletFig. 30 Fillet Reinforced Boss Connection with Pilot, Single BevelFig. 31 Fillet Reinforced Boss Connection (Couplet) with Integral Backing RingFig. 32 Fillet Reinforced Ext

26、ernal Root Connection, Single Bevel with Integrally Reinforced OutletFig. 33 Fillet Reinforced External Root Connection Welded Both Sides, Single Bevel with Integrally Reinforced Outlet4. Piping Classifications and Butt Weld Reinforcements4.1 Piping classifications in accordance with Subpart 56.04 o

27、f USCG Regulations apply to this specification. For definitions ofABS Group I and II Pipe Connections, see ABS Rules, Section 30, Paragraph 30.13.4.2 Maximum thickness of butt weld reinforcements in accordance with 46 CFR Subpart 56.70, Table 56.70-15, of USCGRegulations are listed in Table 1.5. Key

28、words5.1 backing ring pipe welds; boss connections; flange welds; miter joint weld; pipe welds; root connections; sleeve pipe welds;socket welds; welded jointsF722 18318in.316in.=3mm5mm18 in. = 3 mm316 in. = 5 mmApplicationClass II piping piping.Systems or ServiceFor services such as gravity drains

29、(including plumbing),vents, and overflows.Remarks1. Root of weld need not be ground.FIG. 1 Butt Joint, Square116in.18in.78in.=2mm3mm22mm116 in. = 2 mm18 in. = 3 mm78 in. = 22 mmApplicationClass II piping piping.System or ServiceAll provided root of weld is visually inspected wherepossible to ensure

30、complete weld penetration.Remarks1. For services such as vents, overflows, and gravity drains (includ-ing plumbing) the root of the weld need not be ground.FIG. 2 Butt Joint, V-Grooved116in.18in.78in.=2mm3mm22mm116 in. = 2 mm18 in. = 3 mm78 in. = 22 mmApplicationClass I and II piping above 2-in. NPS

31、NPS.System or ServiceAllServiceAll.Remarks1. Internal weld shall be made first and ground, chipped, or cleanedby some other means to assure sound welds.2. The “L” dimension should be held to a minimum to facilitate welding andinspection on the inside surface of the pipe.FIG. 3 Butt, Joint, V-Grooved

32、, Welded Both Sides116in.18in.78in.=2mm3mm22mm116 in. = 2 mm18 in. = 3 mm78 in. = 22 mmApplicationClass I and II piping above 2-in. NPS NPS.System or ServiceAllServiceAll.Remarks1. Internal weld shall be made first and ground, chipped, or cleanedby some other means to assure sound welds.2. The “L” d

33、imension should be held to a minimum to facilitate welding andinspection on the inside surface of the pipe.FIG. 4 Butt Joint, Double V-Grooved, Welded Both SidesF722 184in.mm116218334197822in. 116 18 34 78mm 2 3 19 22ApplicationClass I and II piping above 2-in. NPS NPS.Systems or ServiceAll ServiceA

34、ll.Remarks1. Internal weld shall be made first and ground, chipped, or cleanedby some other means to assure sound welds.2. The “L” dimension should be held to a minimum to facilitate welding andinspection on the inside surface of the pipe.FIG. 5 Butt Joint, Compound Bevel V-Grooved, Welded BothSides

35、116in.18in.78in.=2mm3mm22mm116 in. = 2 mm18 in. = 3 mm78 in. = 22 mmApplicationClass II piping where use will not cause objectionable pressuredrop or turbulence.System or ServiceAll provided root of weld is visually inspected wherepossible to ensure complete weld penetration.Remarks1. For services s

36、uch as vents, overflows, and gravity drains (includ-ing plumbing), the root of the weld need not be ground.2. Miter segments shall be designed in accordance with ANSIASME B31.1,paragraph 104.33,104.3.3, and 46 CFR 56.07-10(f).FIG. 6 Butt Joint, V-Grooved, Miter Typein.mm116218331657822in. 116 18 316

37、 78mm 2 3 5 22ApplicationClass I and II pipingpiping.System or ServiceAll, except as noted in remarksremarks.Remarks1. Backing ring may be tack-welded in place to facilitate fabrication.2. When used in the following services, backing rings shall be removed.(A) Lube oil service discharge piping from

38、the lube oil pumps to the reductiongears, HP and LP turbines, and lube oil gravity tank.(B) Superheated steam outlet piping from the main boilers to the HP and LPturbines and turbo generators and desuperheated steam from the main boilers toturbine driven main feed pumps.(C) Central hydraulic systems

39、.FIG. 7 Butt Joint, V-Grooved, Welded with Bevel End-TypeBacking Ringin.mm1162183146381034197822in. 116 18 14 38 34 78mm 2 3 6 10 19 22ApplicationClass I and II pipingpiping.System or ServiceAll, except as noted in remarksremarks.Remarks1. Backing ring may be tack-welded in place to facilitate fabri

40、cation.2. When used in the following services, backing rings shall be removed.(A) Lube oil service discharge piping from the lube oil pumps to the reductiongears, HP and LP turbines, and lube oil gravity tank.(B) Superheated steam outlet piping from the main boilers to the HP and LPturbines and turb

41、o generators and desuperheated steam from the main boilers toturbine driven main feed pumps.(C) Central hydraulic systems.FIG. 8 Butt Joint, Compound Bevel V-Grooved, Welded withBevel End-Type Backing RingF722 18578 in. =22 mm78 in. = 22 mmApplicationClass I and II pipingpiping.Systems or ServiceAll

42、, except as noted in remarksremarks.Remarks1. Backing ring may be tack-welded in place to facilitate fabrication-fabrication.2. When used in the following services, backing rings shall be removed.(A) Lube oil service discharge piping from the lube oil pumps to the reductiongears, HP and LP turbines,

43、 and lube oil gravity tank.(B) Superheated steam outlet piping from the main boilers to the HP and LPturbines and turbo generators and desuperheated steam from the main boilers toturbine driven main feed pumps.(C) Central hydraulic systems.FIG. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-TypeB

44、acking Ringin.mm116218331657822in. 116 18 316 78mm 2 3 5 22ApplicationClass I and II pipingpiping.Systems or ServiceAllServiceAll.Remarks1. After welding, backing ring shall be machined flush with insidediameter of pipe or fitting.FIG. 10 Butt Joint, V-Grooved, Welded with Square End-TypeBacking Rin

45、gin.mm1640.4132111627822in. 164 132 116 78mm 0.4 1 2 22ApplicationClass I and II piping piping.System or ServiceAllServiceAll.Remarks1. Internal misalignment of pipes shall not exceed 116 in. (2 mm).2. Consumable insert ring shall be centered before welding.FIG. 11 Butt Joint, V-Grooved, Welded with

46、 Consumable InsertRingin.mm1640.41321116234197822in. 164 132 116 34 78mm 0.4 1 2 19 22ApplicationClass I and II pipingpiping.System or ServiceAllServiceAll.Remarks1. Internal misalignment of pipes shall not exceed 116 in. (2 mm).2. Consumable insert ring shall be centered before welding.FIG. 12 Butt

47、 Joint, Compound Bevel V-Grooved, Welded withConsumable Insert RingF722 186in.mm1640.4132111623165in. 164 132 116 316mm 0.4 1 2 5ApplicationClass I and II Piping Piping.System or ServiceAllServiceAll.Remarks1. Internal misalignment of pipes shall not exceed 116 in. (2 mm).2. Consumable insert ring s

48、hall be centered before welding.FIG. 13 Butt Joint, U-Grooved, Welded with Consumable InsertRing0.020in. =0.51mm.0.020 in. = 0.51 mmApplicationClass I and II piping piping.System or ServiceAllServiceAll.Remarks1. Internal misalignment of pipes shall not exceed 132 in. (1 mm).2. Consumable insert rin

49、g shall be centered before welding.FIG. 14 Butt Joint, V-Grooved, Welded with Consumable InsertRing116in. = 2mm14in. = 6mm38in. = 10mm116 in. = 2 mm14 in. = 6 mm38 in. = 10 mmApplicationFittings: See Fig. 18. Flanges: See Fig. 19.System or ServiceSee Fig. 18 and Fig. 19.Remarks1. Size of weld shall be equal to or greater than “T.“T.”2. For Class I piping, depth of insertion of the pipe nipple into the fitting