ASTM F722-82(1998)

Standard Specification for Welded Joints for Shipboard Piping Systems

SCOPE
1.1 This specification covers typical details of welded joints commonly used in shipboard piping systems. These joints and other joints may be used provided the welding procedures used have been qualified in accordance with the applicable regulatory rules and regulations.  
1.2 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 31-Dec-1992
• ICS: 25.160.40 - Welded joints and welds
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaced By: ASTM F722-82(2004) - Standard Specification for Welded Joints for Shipboard Piping Systems
• Effective Date: 01-Nov-2004
• Referred By: ASTM F1273-21 - Standard Specification for Tank Vent Flame Arresters
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1201-88(2021) - Standard Specification for Fluid Conditioner Fittings in Piping Applications Above 0 °F
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1155-10(2019) - Standard Practice for Selection and Application of Piping System Materials
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1386-92(2021) - Standard Guide for Construction of Sounding Tube and Striker Plate for Tank Sounding
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1298-90(2023) - Standard Specification for Flexible, Expansion-Type Ball Joints for Marine Applications
• Effective Date: 01-Jan-1993
• Referred By: ASTM F681-82(2022) - Standard Practice for Use of Branch Connections
• Effective Date: 01-Jan-1993
• Referred By: ASTM F2014-00(2019) - Standard Specification for Non-Reinforced Extruded Tee Connections for Piping Applications
• Effective Date: 01-Jan-1993
• Referred By: ASTM F3386/F3386M-21 - Standard Specification for Detonation Flame Arresters
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1172-88(2019) - Standard Specification for Fuel Oil Meters of the Volumetric Positive Displacement Type
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1271-90(2023) - Standard Specification for Spill Valves for Use in Marine Tank Liquid Overpressure Protections Applications
• Effective Date: 01-Jan-1993
• Referred By: ASTM F1200-21a - Standard Specification for Fabricated (Welded) Pipe Line Strainers (Above 150 psig and 150°F (1 MPa and 65°C))
• Effective Date: 01-Jan-1993

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: F 722 – 82 (Reapproved 1998)
Standard Specification for
Welded Joints for Shipboard Piping Systems
This standard is issued under the fixed designation F 722; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (ϵ) 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. Scope Fig. 7 Butt Joint, V-Grooved, Welded with Bevel End-Type
Backing Ring
1.1 This specification covers typical details of welded joints
Fig. 8 Butt Joint, Compound Bevel V-Grooved, Welded
commonly used in shipboard piping systems. These joints and
with Bevel End-Type Backing Ring
other joints may be used provided the welding procedures used
Fig. 9 Butt Joint, V-Grooved Welded with Bevel End
have been qualified in accordance with the applicable regula-
Lug-Type Backing Ring
tory rules and regulations.
Fig. 10 Butt Joint, V-Grooved, Welded with Square End-
1.2 The values stated in inch-pound units are to be regarded
Type Backing Ring
as the standard.
Fig. 11 Butt Joint, V-Grooved, Welded with Consumable
2. Referenced Documents Insert Ring
Fig. 12 Butt Joint, Compound Bevel V-Grooved, Welded
2.1 Federal Standards:
with Consumable Insert Ring
CodeofFederalRegulationsTitle46, Shipping,Parats30to
Fig. 13 Butt Joint, U-Grooved, Welded with Consumable
Insert Ring
Code of Federal Regulations Title 46, Shipping, Parts 41 to
Fig. 14 Butt Joint, V-Grooved, Welded with Consumable
Insert Ring
CodeofFederalRegulationsTitle46, Shipping,Parts140to
Fig. 15 Butt Joint, Socket Weld to Socket Weld Valve,
Fitting or Flange Welded on Pipe Nipple
Rules for Building and Classing Steel Vessels
Fig. 16 Butt Joint, Transition between Unequal Inside and
3. Application, Service, Limitations, and List of Weld
Outside Diameter Components
Joint Details
3.1.2 Fillet Welded Joints for Valves, Fittings, and Flanges:
Fig. 17 Fillet Welded Sleeve-Type Pipe Coupling
3.1 Details of welded joints, including application, service,
Fig. 18 Fillet Welded Socket Weld Fitting or Valve
and limitation notes, are provided in the appropriate figures, as
Fig. 19 Fillet Welded Socket Weld-Flange
follows:
Fig. 20 Double Fillet Welded Slip-On Flange (Forged)
3.1.1 Butt-Welded Joints for Pipes, Valves, Fittings, and
Fig. 21 Double Fillet Welded Slip-On Flange (Plate Type)
Flanges:
Fig. 22 Fillet Welded Slip-On Flange (Plate Type), Single
Fig. 1 Butt Joint, Square
Bevel
Fig. 2 Butt Joint, V-Grooved
3.1.3 Fabricated Joints:
Fig. 3 Butt Joint, V-Grooved, Welded Both Sides
Fig. 23 Fillet Welded Internal Root Connection
Fig. 4 Butt Joint, Double V-Grooved, Welded Both Sides
Fig. 24 Fillet Welded External Root Connection
Fig. 5 Butt Joint, Compound Bevel V-Grooved, Welded
Fig. 25 Fillet Reinforced External Root Connection Single
Both Sides
Bevel
Fig. 6 Butt Joint, V-Grooved, Miter Type
Fig. 26 Fillet Reinforced External Root Connection, Single
Bevel, Welded Both Sides
This specification is under the jurisdiction of ASTM Committee F25 on Ships
Fig. 27 Fillet Reinforced External Root Connection, Single
and Marine Technology and is the direct responsibility of Subcommittee F25.13 on
Bevel, Welded with Square End Backing Ring
Piping Systems.
Fig. 28 Fillet Reinforced Internal Root Connection, Single
Current edition approved July 30, 1982. Published August 1982. Originally
published as F 722 – 81. Last previous edition F 722 – 81.
Bevel, Welded with Square End Backing Ring
Available from Superintendent of Documents, U.S. Government Printing
3.1.4 Outlet and Boss Connections:
Office, Washington, DC 20402.
Fig. 29 Fillet Reinforced Boss Connection Without Pilot,
Available from American Bureau of Shipping, ABS Plaza, 16855 Northchase
Dr., Houston, TX 77060. Single Bevel
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
F 722 – 82 (1998)
Fig.30 FilletReinforcedBossConnectionwithPilot,Single
Bevel
Fig. 31 Fillet Reinforced Boss Connection (Couplet) with
Integral Backing Ring
Fig. 32 Fillet Reinforced External Root Connection, Single
Bevel with Integrally Reinforced Outlet
Fig. 33 Fillet Reinforced External Root Connection Welded
Both Sides, Single Bevel with Integrally Reinforced Outlet
4. Piping Classifications and Butt Weld Reinforcements
⁄8 in. = 3mm
⁄16 in. = 5mm
4.1 Piping classifications in accordance with Subpart 56.04
Application—Class II piping
of USCG Regulations apply to this specification. For defini-
Systems or Service—For services such as gravity drains (including plumbing),
tions ofABS Group I and II Pipe Connections, seeABS Rules,
vents, and overflows.
Section 30, Paragraph 30.13.
Remarks—1. Root of weld need not be ground.
4.2 Maximum thickness of butt weld reinforcements in
FIG. 1 Butt Joint, Square
accordance with Subpart 56.70, Table 56.70-15, of USCG
Regulations are listed in Table 1.
5. Keywords
5.1 backing ring pipe welds; boss connections; flange
welds; miter joint weld; pipe welds; root connections; sleeve
pipe welds; socket welds; welded joints
TABLE 1 Maximum Butt Weld Reinforcement, in. (mm)
NOTE 1—For double-welded butt joints, this limitation on reinforcement given above applies separately to both inside and outside surfaces of the joint.
NOTE 2—For 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 the thinner of the materials being joined.
NOTE 4—The weld reinforcement thicknesses must be determined for the higher of the abutting surfaces involved.
NOTE 5—For boiler external piping, use the column titled “above 750°F’’ for weld reinforcement thicknesses.
NOTE 6—See 4.2.
Nominal Wall Maximum Operating Temperature of Piping System, °F (°C)
Thickness of
Above 750
Pipe or Tube,
0 to 350 (−18 to 177) to 350 to 750 (177 to 399) to
(399)
in.
1 3 3 1
Up to ⁄8 ⁄16 (5) ⁄32 (2) ⁄16 (2)
1 3 3 1 1
Over ⁄8 to ⁄16 ⁄16 (5) ⁄8 (3) ⁄16 (2)
3 1 3 5 1
Over ⁄16 to ⁄2 ⁄16 (5) ⁄32 (4) ⁄16 (2)
1 3 3 3
Over ⁄2 to 1 ⁄16 (5) ⁄16 (5) ⁄32 (2)
1 1 1
Over 1 to 2 ⁄4 (6) ⁄4 (6) ⁄8 (3)
1 1 1 1 5
Over 2 greater of ⁄4 (6) or ⁄8 the width of the weld greater of ⁄4 (6) or ⁄8 the width of the weld ⁄32 (4)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
F 722 – 82 (1998)
⁄16 in. = 2mm
⁄16 in. = 2mm
1 1
⁄8 in. = 3mm
⁄8 in. = 3mm
⁄8 in. = 22 mm
⁄8 in. = 22 mm
Application—Class I and II piping above 2-in. NPS
Application—Class II piping
System or Service—All
System or Service—All provided root of weld is visually inspected where
possible to ensure complete weld penetration. Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
by some other means to assure sound welds.
Remarks—1. For services such as vents, overflows, and gravity drains (includ-
2. The “L” dimension should be held to a minimum to facilitate welding and
ing plumbing) the root of the weld need not be ground.
inspection on the inside surface of the pipe.
FIG. 2 Butt Joint, V-Grooved
FIG. 4 Butt Joint, Double V-Grooved, Welded Both Sides
⁄16 in. = 2mm
⁄8 in. = 3mm
1 1 3 7
7 in. ⁄16 ⁄8 ⁄4 ⁄8
⁄8 in. = 22 mm
mm 2 3 19 22
Application—Class I and II piping above 2-in. NPS
System or Service—All
Application—Class I and II piping above 2-in. NPS
Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
Systems or Service—All
by some other means to assure sound welds.
Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
2. The “L” dimension should be held to a minimum to facilitate welding and
by some other means to assure sound welds.
inspection on the inside surface of the pipe.
2. The “L” dimension should be held to a minimum to facilitate welding and
FIG. 3 Butt, Joint, V-Grooved, Welded Both Sides
inspection on the inside surface of the pipe.
FIG. 5 Butt Joint, Compound Bevel V-Grooved, Welded Both
Sides
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
F 722 – 82 (1998)
1 1 1 3 3 7
in. ⁄16 ⁄8 ⁄4 ⁄8 ⁄4 ⁄8
⁄16 in. = 2mm
mm 2 3 6 10 19 22
⁄8 in. = 3mm
⁄8 in. = 22 mm
Application—Class I and II piping
Application—Class II piping where use will not cause objectionable pressure System or Service—All, except as noted in remarks
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication.
drop or turbulence.
2. When used in the following services, backing rings shall be removed.
System or Service—All provided root of weld is visually inspected where
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
possible to ensure complete weld penetration.
gears, HP and LP turbines, and lube oil gravity tank.
Remarks—1. For services such as vents, overflows, and gravity drains (includ-
(B) Superheated steam outlet piping from the main boilers to the HP and LP
ing plumbing), the root of the weld need not be ground.
turbines and turbo generators and desuperheated steam from the main boilers to
2. Miter segments shall be designed in accordance with ANSI B31.1, paragraph
turbine driven main feed pumps.
104.33, and 46 CFR 56.07-10(f).
(C) Central hydraulic systems.
FIG. 6 Butt Joint, V-Grooved, Miter Type
FIG. 8 Butt Joint, Compound Bevel V-Grooved, Welded with
Bevel End-Type Backing Ring
1 1 3 7
in. ⁄16 ⁄8 ⁄16 ⁄8
mm 2 3 5 22
Application—Class I and II piping
System or Service—All, except as noted in remarks ⁄8 in. = 22 mm
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication.
2. When used in the following services, backing rings shall be removed.
Application—Class I and II piping
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
Systems or Service—All, except as noted in remarks
gears, HP and LP turbines, and lube oil gravity tank.
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication
(B) Superheated steam outlet piping from the main boilers to the HP and LP
2. When used in the following services, backing rings shall be removed.
turbines and turbo generators and desuperheated steam from the main boilers to
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
turbine driven main feed pumps.
gears, HP and LP turbines, and lube oil gravity tank.
(C) Central hydraulic systems.
(B) Superheated steam outlet piping from the main boilers to the HP and LP
FIG. 7 Butt Joint, V-Grooved, Welded with Bevel End-Type
turbines and turbo generators and desuperheated steam from the main boilers to
Backing Ring
turbine driven main feed pumps.
(C) Central hydraulic systems.
FIG. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-Type
Backing Ring
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
F 722 – 82 (1998)
1 1 3 7
1 1 1 3
in. ⁄16 ⁄8 ⁄16 ⁄8
in. ⁄64 ⁄32 ⁄16 ⁄16
mm 2 3 5 22
mm 0.4 1 2 5
Application—Class I and II piping
Application—Class I and II Piping
Systems or Service—All
System or Service—All
Remarks—1. After welding, backing ring shall be machined flush with inside
Remarks—1. Internal misalignment of pipes shall not exceed ⁄16 in. (2 mm).
diameter of pipe or fitting.
2. Consumable insert ring shall be centered before welding.
FIG. 10 Butt Joint, V-Grooved, Welded with Square End-Type
FIG. 13 Butt Joint, U-Grooved, Welded with Consumable Insert
Backing Ring
Ring
1 1 1 7
in. ⁄64 ⁄32 ⁄16 ⁄8
0.020 in. = 0.51 mm.
mm 0.4 1 2 22
Application—Class I and II piping
System or Service—All
Application—Class I and II piping 1
Remarks—1. Internal misalignment of pipes shall not exceed ⁄32 in. (1 mm).
System or Service—All
2. Consumable insert ring shall be centered before welding.
Remarks—1. Internal misalignment of pipes shall not exceed ⁄16 in. (2 mm).
FIG. 14 Butt Joint, V-Grooved, Welded with Consumable Insert
2. Consumable insert ring shall be centered before welding.
Ring
FIG. 11 Butt Joint, V-Grooved, Welded with Consumable Insert
Ring
1 1 1 3 7
in. ⁄64 ⁄32 ⁄16 ⁄4 ⁄8
mm 0.4 1 2 19 22
Application—Class I and II piping
System or Service—All
Remarks—1. Internal misalignment of pipes shall not exceed ⁄16 in. (2 mm).
2. Consumable insert ring shall be centered before welding.
FIG. 12 Butt Joint, Compound Bevel V-Grooved, Welded with
Consumable Insert Ring
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
F 722 – 82 (1998)
⁄16 in.=2mm
Application—Class I piping 3-in. NPS max where not subject to full radiography
by 46 CFR Table 56.95-10. Class II piping all sizes.
1 Systems or Service—All
⁄16 in. = 2 mm
1 Remarks—1. Size of weld shall be 1.4 T min but not less than ⁄8 in. (3 mm).
⁄4 in. = 6 mm
3 2. For Class I piping, depth of insertion of pipe, tube, or fitting in sleeve shall not
⁄8 in. = 10 mm
be less than ⁄8 in. (10 mm).
Application—Fittings: See Fig. 18. Flanges: See Fig. 19. 3. Weld to be deposited in a minimum of two passes unless specifically
System or Service—See Fig. 18 and Fig. 19.
approved otherwise in a special procedure qualification.
Remarks—1. Size of weld shall be equal to or greater than “T.’’ 4. For Class I piping, the inside diameter of the sleeve shall not exceed the
2. For Class I piping, depth of insertion of the pipe nipple into the fitting shall not
outside diameter of the pipe, tube, or fitting by more than 0.080 in. (2.03 mm).
be less than ⁄8 in. (10 mm). 5. Couplings may be used with flat or beveled end pipes and fitting.
3. Weld to be deposited in a minimum of two passes unless specifically
FIG. 17 Fillet Welded Sleeve-Type Pipe Coupling
approved otherwise in a special procedure qualification.
FIG. 15 Butt Joint, Socket Weld to Socket Weld Valve, Fitting or
Flange Welded on Pipe Nipple
⁄16 in.=2mm
Application—Class I piping 3-in. NPS max where not subject to full radiography
by 46 CFR Table 56.95-10. Class II piping all sizes.
...