1、Designation: F 722 82 (Reapproved 2008)An American National StandardStandard Specification forWelded Joints for Shipboard Piping Systems1This standard is issued under the fixed designation F 722; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specifi
3、cation covers typical details of welded jointscommonly used in shipboard piping systems. These joints andother joints may be used provided the welding procedures usedhave been qualified in accordance with the applicable regula-tory rules and regulations.1.2 The values stated in inch-pound units are
4、to be regardedas the standard.2. Referenced Documents2.1 Federal Standards:Code of Federal Regulations Title 46, Shipping, Parts 30 to402Code of Federal Regulations Title 46, Shipping, Parts 41 to692Code of Federal Regulations Title 46, Shipping, Parts 140 to1492Rules for Building and Classing Steel
5、 Vessels33. Application, Service, Limitations, and List of WeldJoint Details3.1 Details of welded joints, including application, service,and limitation notes, are provided in the appropriate figures, asfollows:3.1.1 Butt-Welded Joints for Pipes, Valves, Fittings, andFlanges:Fig. 1 Butt Joint, Square
6、Fig. 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, WeldedBoth SidesFig. 6 Butt Joint, V-Grooved, Miter TypeFig. 7 Butt Joint, V-Grooved, Welded with Bevel End-TypeBacking RingFi
7、g. 8 Butt Joint, Compound Bevel V-Grooved, Weldedwith Bevel End-Type Backing RingFig. 9 Butt Joint, V-Grooved Welded with Bevel EndLug-Type Backing RingFig. 10 Butt Joint, V-Grooved, Welded with Square End-Type Backing RingFig. 11 Butt Joint, V-Grooved, Welded with ConsumableInsert RingFig. 12 Butt
8、Joint, Compound Bevel V-Grooved, Weldedwith Consumable Insert RingFig. 13 Butt Joint, U-Grooved, Welded with ConsumableInsert RingFig. 14 Butt Joint, V-Grooved, Welded with ConsumableInsert RingFig. 15 Butt Joint, Socket Weld to Socket Weld Valve,Fitting or Flange Welded on Pipe NippleFig. 16 Butt J
9、oint, Transition between Unequal Inside andOutside Diameter Components3.1.2 Fillet Welded Joints for Valves, Fittings, and Flanges:Fig. 17 Fillet Welded Sleeve-Type Pipe CouplingFig. 18 Fillet Welded Socket Weld Fitting or ValveFig. 19 Fillet Welded Socket Weld-FlangeFig. 20 Double Fillet Welded Sli
10、p-On Flange (Forged)Fig. 21 Double Fillet Welded Slip-On Flange (Plate Type)Fig. 22 Fillet Welded Slip-On Flange (Plate Type), SingleBevel3.1.3 Fabricated Joints:Fig. 23 Fillet Welded Internal Root ConnectionFig. 24 Fillet Welded External Root ConnectionFig. 25 Fillet Reinforced External Root Connec
11、tion SingleBevelFig. 26 Fillet Reinforced External Root Connection, SingleBevel, Welded Both SidesFig. 27 Fillet Reinforced External Root Connection, SingleBevel, Welded with Square End Backing RingFig. 28 Fillet Reinforced Internal Root Connection, SingleBevel, Welded with Square End Backing Ring3.
12、1.4 Outlet and Boss Connections:Fig. 29 Fillet Reinforced Boss Connection Without Pilot,Single Bevel1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition
13、 approved Nov. 1, 2008. Published December 2008. Originallyapproved in 1981. Last previous edition approved in 2004 as F 722 82 (2004).2Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.3Available from American Bur
14、eau of Shipping (ABS), ABS Plaza, 16855Northchase Dr., Houston, TX 77060.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Fig. 30 Fillet Reinforced Boss Connection with Pilot, SingleBevelFig. 31 Fillet Reinforced Boss Connection (Coup
15、let) withIntegral Backing RingFig. 32 Fillet Reinforced External Root Connection, SingleBevel with Integrally Reinforced OutletFig. 33 Fillet Reinforced External Root Connection WeldedBoth Sides, Single Bevel with Integrally Reinforced Outlet4. Piping Classifications and Butt Weld Reinforcements4.1
16、Piping classifications in accordance with Subpart 56.04of USCG Regulations apply to this specification. For defini-tions of ABS Group I and II Pipe Connections, see ABS Rules,Section 30, Paragraph 30.13.4.2 Maximum thickness of butt weld reinforcements inaccordance with Subpart 56.70, Table 56.70-15
17、, of USCGRegulations are listed in Table 1.5. Keywords5.1 backing ring pipe welds; boss connections; flangewelds; miter joint weld; pipe welds; root connections; sleevepipe welds; socket welds; welded jointsTABLE 1 Maximum Butt Weld Reinforcement, in. (mm)NOTE 1For double-welded butt joints, this li
18、mitation on reinforcement given above applies separately to both inside and outside surfaces of the joint.NOTE 2For single-welded butt joints, the reinforcement limits given above apply to the outside surface of the joint only.NOTE 3 The thickness of weld reinforcement is based on the thickness of t
19、he thinner of the materials being joined.NOTE 4The weld reinforcement thicknesses must be determined for the higher of the abutting surfaces involved.NOTE 5For boiler external piping, use the column titled “above 750F for weld reinforcement thicknesses.NOTE 6See 4.2.Nominal WallThickness ofPipe or T
20、ube,in.Maximum Operating Temperature of Piping System, F (C)0 to 350 (18 to 177) to 350 to 750 (177 to 399) toAbove 750(399)Up to18316 (5)332 (2)116 (2)Over18 to316316 (5)18 (3)116 (2)Over316 to12316 (5)532 (4)116 (2)Over12 to 1316 (5)316 (5)332 (2)Over 1 to 214 (6)14 (6)18 (3)Over 2 greater of14 (6
21、) or18 the width of the weld greater of14 (6) or18 the width of the weld532 (4)18 in.316 in.=3mm5mmApplicationClass II pipingSystems or ServiceFor services such as gravity drains (including plumbing),vents, and overflows.Remarks1. Root of weld need not be ground.FIG. 1 Butt Joint, SquareF 722 82 (20
22、08)2116 in.18 in.78 in.=2mm3mm22 mmApplicationClass II pipingSystem or ServiceAll provided root of weld is visually inspected wherepossible to ensure complete weld penetration.Remarks1. For services such as vents, overflows, and gravity drains (includ-ing plumbing) the root of the weld need not be g
23、round.FIG. 2 Butt Joint, V-Grooved116 in.18 in.78 in.=2mm3mm22 mmApplicationClass I and II piping above 2-in. NPSSystem or ServiceAllRemarks1. 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 t
24、o facilitate welding andinspection on the inside surface of the pipe.FIG. 3 Butt, Joint, V-Grooved, Welded Both Sides116 in.18 in.78 in.=2mm3mm22 mmApplicationClass I and II piping above 2-in. NPSSystem or ServiceAllRemarks1. Internal weld shall be made first and ground, chipped, or cleanedby some o
25、ther 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. 4 Butt Joint, Double V-Grooved, Welded Both Sidesin.mm116218334197822ApplicationClass I and II piping above 2-in. NPSSystems or ServiceAllRemar
26、ks1. 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 BothSidesF 722 82
27、 (2008)3116 in.18 in.78 in.=2mm3mm22 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 such as vents, overflows, and
28、gravity drains (includ-ing plumbing), the root of the weld need not be ground.2. Miter segments shall be designed in accordance with ANSI B31.1, paragraph104.33, and 46 CFR 56.07-10(f).FIG. 6 Butt Joint, V-Grooved, Miter Typein.mm116218331657822ApplicationClass I and II pipingSystem or ServiceAll, e
29、xcept as noted in remarksRemarks1. 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 the lube oil pumps to the reductiongears, HP and LP turbines, and lube oil gravity t
30、ank.(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. 7 Butt Joint, V-Grooved, Welded with Bevel End-TypeBacking Ringin.mm1162183146
31、381034197822ApplicationClass I and II pipingSystem or ServiceAll, except as noted in remarksRemarks1. 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 the lube oil pump
32、s 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.FIG. 8 Butt Join
33、t, Compound Bevel V-Grooved, Welded withBevel End-Type Backing Ring78 in. = 22 mmApplicationClass I and II pipingSystems or ServiceAll, except as noted in remarksRemarks1. Backing ring may be tack-welded in place to facilitate fabrication2. When used in the following services, backing rings shall be
34、 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 turbo generators and desuperheated steam from the main boilers toturbine
35、driven main feed pumps.(C) Central hydraulic systems.FIG. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-TypeBacking RingF 722 82 (2008)4in.mm116218331657822ApplicationClass I and II pipingSystems or ServiceAllRemarks1. After welding, backing ring shall be machined flush with insidediameter of pi
36、pe or fitting.FIG. 10 Butt Joint, V-Grooved, Welded with Square End-TypeBacking Ringin.mm1640.4132111627822ApplicationClass I and II pipingSystem or ServiceAllRemarks1. Internal misalignment of pipes shall not exceed116 in. (2 mm).2. Consumable insert ring shall be centered before welding.FIG. 11 Bu
37、tt Joint, V-Grooved, Welded with Consumable InsertRingin.mm1640.41321116234197822ApplicationClass I and II pipingSystem or ServiceAllRemarks1. Internal misalignment of pipes shall not exceed116 in. (2 mm).2. Consumable insert ring shall be centered before welding.FIG. 12 Butt Joint, Compound Bevel V
38、-Grooved, Welded withConsumable Insert Ringin.mm1640.4132111623165ApplicationClass I and II PipingSystem or ServiceAllRemarks1. Internal misalignment of pipes shall not exceed116 in. (2 mm).2. Consumable insert ring shall be centered before welding.FIG. 13 Butt Joint, U-Grooved, Welded with Consumab
39、le InsertRing0.020 in. = 0.51 mm.ApplicationClass I and II pipingSystem or ServiceAllRemarks1. Internal misalignment of pipes shall not exceed132 in. (1 mm).2. Consumable insert ring shall be centered before welding.FIG. 14 Butt Joint, V-Grooved, Welded with Consumable InsertRingF 722 82 (2008)5116
40、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.2. For Class I piping, depth of insertion of the pipe nipple into the fitting shall notbe less than38 in. (
41、10 mm).3. Weld to be deposited in a minimum of two passes unless specificallyapproved otherwise in a special procedure qualification.FIG. 15 Butt Joint, Socket Weld to Socket Weld Valve, Fitting orFlange Welded on Pipe NippleFIG. 16 Butt Joint, Transition Between Unequal Inside andOutside Diameter C
42、omponents116 in.=2mmApplicationClass I piping 3-in. NPS max where not subject to full radiographyby 46 CFR Table 56.95-10. Class II piping all sizes.Systems or ServiceAllRemarks1. Size of weld shall be 1.4 T min but not less than18 in. (3 mm).2. For Class I piping, depth of insertion of pipe, tube,
43、or fitting in sleeve shall notbe less than38 in. (10 mm).3. Weld to be deposited in a minimum of two passes unless specificallyapproved otherwise in a special procedure qualification.4. For Class I piping, the inside diameter of the sleeve shall not exceed theoutside diameter of the pipe, tube, or f
44、itting by more than 0.080 in. (2.03 mm).5. Couplings may be used with flat or beveled end pipes and fitting.FIG. 17 Fillet Welded Sleeve-Type Pipe Coupling116 in.=2mmApplicationClass I piping 3-in. NPS max where not subject to full radiographyby 46 CFR Table 56.95-10. Class II piping all sizes.Syste
45、m or ServiceAll, except socket welds shall not be used where severeerosion or crevice corrosion is expected to occur.Remarks1. Size of weld shall be 114 T min but not less than18 in. (3 mm).2. For Class I piping, depth of insertion of pipe or tube into the fitting shall not beless than38 in. (10 mm)
46、.3. Weld to be deposited in a minimum of two passes unless specificallyapproved otherwise in a special procedure qualification.FIG. 18 Fillet Welded Socket Weld Fitting or ValveF 722 82 (2008)6116 in. = 2 mm.Application Class I piping 3-in. NPS max for 600# and lower classes and212-in. NPS for 900 a
47、nd 1500# classes. 3-in. size not permitted where subject tofull radiography by 46 CFR Table 56.95-10. Class II piping all sizes.System or ServiceAll, except socket welds shall not be used where severeerosion or crevice corrosion is expected to occurRemarks1. Size of Weld W1 shall be 1.4 T min. for C
48、lass II piping, size of weldmay be limited to1732 in. (13 mm) max.2. Weld to be deposited in a minimum of two passes unless specificallyapproved otherwise in a special procedure qualification.FIG. 19 Fillet Welded Socket Weld FlangeApplicationClass I and II piping not to exceed the service pressure
49、tempera-ture ratings for the 300# and lower classes. Slip-on flanges shall not be used onClass I piping where subject to full radiography by 46 CFR Table 56.95-10.System or ServiceAllRemarks1. Size of Weld W1 shall be 1.4 T min. for Class II piping, size of weldmay be limited to1732 in. (13 mm) max.2. Size of Weld W2 shall be equal to “T or14 in. (6 mm), whichever is smaller.3. Dimension X shall be equal t
