ASTM F722-82(2008)

Standard Specification for Welded Joints for Shipboard Piping Systems

ABSTRACT
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. The maximum butt weld reinforcement of differnet nominal wall thicknesses of pipe or tube shall be discussed.
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-Oct-2008
• ICS: 25.160.40 - Welded joints and welds
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F722-82(2004) - Standard Specification for Welded Joints for Shipboard Piping Systems
• Effective Date: 01-Nov-2008
• Replaced By: ASTM F722-82(2014) - Standard Specification for Welded Joints for Shipboard Piping Systems
• Effective Date: 01-Nov-2014
• 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-Nov-2008
• Referred By: ASTM F681-82(2022) - Standard Practice for Use of Branch Connections
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1172-88(2019) - Standard Specification for Fuel Oil Meters of the Volumetric Positive Displacement Type
• Effective Date: 01-Nov-2008
• Referred By: ASTM F2014-00(2019) - Standard Specification for Non-Reinforced Extruded Tee Connections for Piping Applications
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1155-10(2019) - Standard Practice for Selection and Application of Piping System Materials
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1271-90(2023) - Standard Specification for Spill Valves for Use in Marine Tank Liquid Overpressure Protections Applications
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1273-21 - Standard Specification for Tank Vent Flame Arresters
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1201-88(2021) - Standard Specification for Fluid Conditioner Fittings in Piping Applications Above 0 °F
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1298-90(2023) - Standard Specification for Flexible, Expansion-Type Ball Joints for Marine Applications
• Effective Date: 01-Nov-2008
• Referred By: ASTM F1386-92(2021) - Standard Guide for Construction of Sounding Tube and Striker Plate for Tank Sounding
• Effective Date: 01-Nov-2008
• Referred By: ASTM F3386/F3386M-21 - Standard Specification for Detonation Flame Arresters
• Effective Date: 01-Nov-2008

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F722 −82(Reapproved 2008) An American National Standard
Standard Specification for
Welded Joints for Shipboard Piping Systems
ThisstandardisissuedunderthefixeddesignationF722;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
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
Insert Ring
2. Referenced Documents
Fig. 12 Butt Joint, Compound Bevel V-Grooved, Welded
with Consumable Insert Ring
2.1 Federal Standards:
Code of Federal Regulations Title 46, Shipping, Parts 30 to 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
69 Insert Ring
Code of Federal Regulations Title 46, Shipping, Parts 140 to Fig. 15 Butt Joint, Socket Weld to Socket Weld Valve,
149 Fitting or Flange Welded on Pipe Nipple
Rules for Building and Classing Steel Vessels Fig. 16 Butt Joint, Transition between Unequal Inside and
Outside Diameter Components
3. Application, Service, Limitations, and List of Weld
3.1.2 Fillet Welded Joints for Valves, Fittings, and Flanges:
Joint Details
Fig. 17 Fillet Welded Sleeve-Type Pipe Coupling
Fig. 18 Fillet Welded Socket Weld Fitting or Valve
3.1 Details of welded joints, including application, service,
Fig. 19 Fillet Welded Socket Weld-Flange
and limitation notes, are provided in the appropriate figures, as
Fig. 20 Double Fillet Welded Slip-On Flange (Forged)
follows:
Fig. 21 Double Fillet Welded Slip-On Flange (Plate Type)
3.1.1 Butt-Welded Joints for Pipes, Valves, Fittings, and
Fig. 22 Fillet Welded Slip-On Flange (Plate Type), Single
Flanges:
Bevel
Fig. 1 Butt Joint, Square
3.1.3 Fabricated Joints:
Fig. 2 Butt Joint, V-Grooved
Fig. 23 Fillet Welded Internal Root Connection
Fig. 3 Butt Joint, V-Grooved, Welded Both Sides
Fig. 24 Fillet Welded External Root Connection
Fig. 4 Butt Joint, Double V-Grooved, Welded Both Sides
Fig. 25 Fillet Reinforced External Root Connection Single
Fig. 5 Butt Joint, Compound Bevel V-Grooved, Welded
Bevel
Both Sides
Fig. 26 Fillet Reinforced External Root Connection, Single
Fig. 6 Butt Joint, V-Grooved, Miter Type
Bevel, Welded Both Sides
Fig. 27 Fillet Reinforced External Root Connection, Single
This specification is under the jurisdiction of ASTM Committee F25 on Ships Bevel, Welded with Square End Backing Ring
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Fig. 28 Fillet Reinforced Internal Root Connection, Single
Machinery and Piping Systems.
Bevel, Welded with Square End Backing Ring
Current edition approved Nov. 1, 2008. Published December 2008. Originally
3.1.4 Outlet and Boss Connections:
approved in 1981. Last previous edition approved in 2004 as F722 – 82 (2004).
DOI: 10.1520/F0722-82R08.
Fig. 29 Fillet Reinforced Boss Connection Without Pilot,
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Single Bevel
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.
Fig.30 FilletReinforcedBossConnectionwithPilot,Single
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855
Northchase Dr., Houston, TX 77060. Bevel
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F722−82 (2008)
⁄8 in. = 3mm
⁄16 in. = 5mm
Application—Class II piping ⁄16 in. = 2mm
⁄8 in. = 3mm
Systems or Service—For services such as gravity drains (including plumbing),
vents, and overflows. ⁄8 in. = 22 mm
Remarks—1. Root of weld need not be ground.
Application—Class I and II piping above 2-in. NPS
FIG. 1 Butt Joint, Square
System or Service—All
Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
by some other means to assure sound welds.
2. The “L” dimension should be held to a minimum to facilitate welding and
inspection on the inside surface of the pipe.
FIG. 3 Butt, Joint, V-Grooved, Welded Both Sides
⁄16 in. = 2mm
⁄8 in. = 3mm
⁄8 in. = 22 mm
Application—Class II piping
System or Service—All provided root of weld is visually inspected where
⁄16 in. = 2mm
possible to ensure complete weld penetration.
⁄8 in. = 3mm
Remarks—1. For services such as vents, overflows, and gravity drains (includ-
⁄8 in. = 22 mm
ing plumbing) the root of the weld need not be ground.
FIG. 2 Butt Joint, V-Grooved
Application—Class I and II piping above 2-in. NPS
System or Service—All
Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
by some other means to assure sound welds.
Fig. 31 Fillet Reinforced Boss Connection (Couplet) with
2. The “L” dimension should be held to a minimum to facilitate welding and
Integral Backing Ring
inspection on the inside surface of the pipe.
Fig. 32 Fillet Reinforced External Root Connection, Single FIG. 4 Butt Joint, Double V-Grooved, Welded Both Sides
Bevel with Integrally Reinforced Outlet
Fig. 33 Fillet Reinforced External Root Connection Welded
4.2 Maximum thickness of butt weld reinforcements in
Both Sides, Single Bevel with Integrally Reinforced Outlet
accordance with Subpart 56.70, Table 56.70-15, of USCG
Regulations are listed in Table 1.
4. Piping Classifications and Butt Weld Reinforcements
5. Keywords
4.1 Piping classifications in accordance with Subpart 56.04
of USCG Regulations apply to this specification. For defini- 5.1 backing ring pipe welds; boss connections; flange
tions ofABS Group I and II Pipe Connections, seeABS Rules, welds; miter joint weld; pipe welds; root connections; sleeve
Section 30, Paragraph 30.13. pipe welds; socket welds; welded joints
F722−82 (2008)
1 1 3 7
in. ⁄16 ⁄8 ⁄16 ⁄8
mm 2 3 5 22
1 1 3 7
in. ⁄16 ⁄8 ⁄4 ⁄8
mm 2 3 19 22
Application—Class I and II piping
System or Service—All, except as noted in remarks
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication.
Application—Class I and II piping above 2-in. NPS
2. When used in the following services, backing rings shall be removed.
Systems or Service—All
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
Remarks—1. Internal weld shall be made first and ground, chipped, or cleaned
gears, HP and LP turbines, and lube oil gravity tank.
by some other means to assure sound welds.
(B) Superheated steam outlet piping from the main boilers to the HP and LP
2. The “L” dimension should be held to a minimum to facilitate welding and
turbines and turbo generators and desuperheated steam from the main boilers to
inspection on the inside surface of the pipe.
turbine driven main feed pumps.
(C) Central hydraulic systems.
FIG. 5 Butt Joint, Compound Bevel V-Grooved, Welded Both
FIG. 7 Butt Joint, V-Grooved, Welded with Bevel End-Type Back-
Sides
ing Ring
⁄16 in. = 2mm
1 1 1 3 3 7
in. ⁄16 ⁄8 ⁄4 ⁄8 ⁄4 ⁄8
⁄8 in. = 3mm
mm 2 3 6 10 19 22
⁄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
drop or turbulence.
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication.
System or Service—All provided root of weld is visually inspected where
2. When used in the following services, backing rings shall be removed.
possible to ensure complete weld penetration.
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
Remarks—1. For services such as vents, overflows, and gravity drains (includ-
gears, HP and LP turbines, and lube oil gravity tank.
ing plumbing), the root of the weld need not be ground.
(B) Superheated steam outlet piping from the main boilers to the HP and LP
2. MitersegmentsshallbedesignedinaccordancewithANSIB31.1,paragraph
turbines and turbo generators and desuperheated steam from the main boilers to
104.33, and 46 CFR 56.07-10(f).
turbine driven main feed pumps.
FIG. 6 Butt Joint, V-Grooved, Miter Type
(C) Central hydraulic systems.
FIG. 8 Butt Joint, Compound Bevel V-Grooved, Welded with
Bevel End-Type Backing Ring
F722−82 (2008)
1 1 1 7
in. ⁄64 ⁄32 ⁄16 ⁄8
mm 0.4 1 2 22
⁄8 in. = 22 mm
Application—Class I and II piping
Application—Class I and II piping
Systems or Service—All, except as noted in remarks
System or Service—All
Remarks—1. Backing ring may be tack-welded in place to facilitate fabrication
Remarks—1. Internal misalignment of pipes shall not exceed ⁄16 in. (2 mm).
2. When used in the following services, backing rings shall be removed.
2. Consumable insert ring shall be centered before welding.
(A) Lube oil service discharge piping from the lube oil pumps to the reduction
FIG. 11 Butt Joint, V-Grooved, Welded with Consumable Insert
gears, HP and LP turbines, and lube oil gravity tank.
Ring
(B) Superheated steam outlet piping from the main boilers to the HP and LP
turbines and turbo generators and desuperheated steam from the main boilers to
turbine driven main feed pumps.
(C) Central hydraulic systems.
FIG. 9 Butt Joint, V-Grooved Welded with Bevel End Lug-Type
Backing 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
1 1 3 7
in. ⁄16 ⁄8 ⁄16 ⁄8 1
Remarks—1. Internal misalignment of pipes shall not exceed ⁄16 in. (2 mm).
mm 2 3 5 22
2. Consumable insert ring shall be centered before welding.
FIG. 12 Butt Joint, Compound Bevel V-Grooved, Welded with
Application—Class I and II piping
Consumable Insert Ring
Systems or Service—All
Remarks—1. After welding, backing ring shall be machined flush with inside
diameter of pipe or fitting.
FIG. 10 Butt Joint, V-Grooved, Welded with Square End-Type
Backing Ring
1 1 1 3
in. ⁄64 ⁄32 ⁄16 ⁄16
mm 0.4 1 2 5
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. 13 Butt Joint, U-Grooved, Welded with Consumable Insert
Ring
F722−82 (2008)
0.020 in. = 0.51 mm.
Application—Class I and II piping
System or Service—All
Remarks—1. Internal misalignment of pipes shall not exceed ⁄32 in. (1 mm).
2. Consumable insert ring shall be centered before welding.
FIG. 14 Butt Joint, V-Grooved, Welded with Consumable Insert
Ring
FIG. 16 Butt Joint, Transition Between Unequal Inside and Out-
side Diameter Components
⁄16 in. = 2 mm
⁄4 in. = 6 mm
⁄8 in. = 10 mm
Application—Fittings: See Fig. 18. Flanges: See Fig. 19.
System or Service—See Fig. 18 and Fig. 19.
⁄16in.=2mm
Remarks—1. Size of weld shall be equal to or greater than “T.’’
2. ForClassIpiping,depthofinsertionofthepipenippleintothefittingshallnot
Application—Class I piping 3-in. NPS max where not subject to full radiography
be less than ⁄8 in. (10 mm).
by 46 CFR Table 56.95-10. Class II piping all sizes.
3. Weld to be deposited in a minimum of two passes unless specifically
Systems or Service—All
approved otherwise in a special procedure qualification.
Remarks—1. Size of weld shall be 1.4 T min but not less than ⁄8 in. (3 mm).
FIG. 15 Butt Joint, Socket Weld to Socket Weld Valve, Fitting or
2. ForClassIpiping,depthofinsertionofpipe,tube,orfittinginsleeveshallnot
Flange Welded on Pipe Nipple
be less than ⁄8 in. (10 mm).
3. Weld to be deposited in a minimum of two passes unless specifically
approved otherwise in a special procedure qualification.
4. For Class I piping, the inside diameter of the sleeve shall not exceed the
outside diameter of the pipe, tube, or fitting 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 Coupling
F722−82 (2008)
⁄16in.=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.
System or Service—All, except socket welds shall not be used where severe
erosion or crevice corrosion is expected to occur.
1 1
Remarks—1. Size of weld shall be 1 ⁄4 T min but not less than ⁄8 in. (3 mm).
Application—Class I and II piping not to exceed the service pressure tempera-
2. ForClassIpiping,depthofinsertionofpipeortubeintothefittingshallnotbe
ture ratings for the 300# and lower classes. Slip-on flanges shall not be used on
less than ⁄8 in. (10 mm).
Class I piping where subject to full radiography by 46 CFR Table 56.95-10.
3. Weld to be deposited in a minimum of two passes unless specifically
System or Service—All
approved otherwise in a special procedure qualification.
Remarks—1.SizeofWeldW1shallbe1.4Tmin.forClassIIpiping,sizeofweld
FIG. 18 Fillet Welded Socket Weld Fitting or Valve
may be limited to ⁄32 in. (13 mm) max.
2. Size of Weld W2 shall be equal to “T’’ or ⁄4 in. (6 mm), whichever is smaller.
3. Dimension X shall be equal to T plus ⁄16 in. (2 mm) min. for Class II piping,
Dimension X may be limited to ⁄8 in. (10 mm).
FIG. 20 Double Fillet Welded Slip-on Flange (Forged)
⁄16 in. = 2 mm.
Application— Class I piping 3-in. NPS max for 600# and lower classes and
2 ⁄2-in. NPS for 900 and 1500# classes. 3-in. size not permitted where subject to
full radiography by 46 CFR Table 56.95-10. Class II piping all sizes.
System or Service—All, except socket welds shall not be used where severe
erosion or crevice corrosion is expected to occur
Remarks—1. SizeofWeldW1shallbe1.4Tmin.forClassIIpiping,sizeofweld
may be limited to ⁄32 in. (13 mm) max.
Application—ClassIIpipingnotexceeding150psi(1034kPa)or450°F(232°C)
2. Weld to be deposited in a minimum of two passes unless specifically
System or Service—All
approved otherwise in a special procedure qualification.
Remarks—1.SizeofWeld8aW1shallbe1.4“T’’minbutmaybelimitedto ⁄32
FIG. 19 Fillet Welded Socket Weld Flange
in. (13 mm).
2. Size of Weld W2 shall be equal to “T’’ or ⁄4 in. (6 mm), whichever is smalle
...