ASTM F1076-19
(Practice)Standard Practice for Expanded Welded and Silver Brazed Socket Joints for Pipe and Tube
Standard Practice for Expanded Welded and Silver Brazed Socket Joints for Pipe and Tube
SIGNIFICANCE AND USE
3.1 Expanded welded socket joints may be used with the following pipe and tube:
3.1.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.1.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.1.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter.
3.1.4 Seamless Stainless Steel Pipe—2 NPS through 6 NPS, Schedules 5 and 10.
3.2 Expanded silver brazed socket joints may be used with the following tube:
3.2.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.2.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.2.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter.
3.3 Expanded welded and silver brazed socket joints may be used where experience or test has demonstrated that the joint is safe and suitable for design and operating conditions, and where adequate provision is made to prevent separation of the joint.
SCOPE
1.1 This practice covers expanded welded and silver brazed socket joints for use on shipboard piping systems.
1.2 Expanded welded and silver brazed socket joints are to be used to join two pipes or tubes having the same NPS (see Note 1) without using a fitting or butt weld.
1.3 Brazed socket type joints are not intended for use on systems containing flammable or combustible fluids in areas where fire hazards exist or where the service temperature exceeds 425°F (205°C).
1.4 Brazed joints depending solely upon a fillet weld rather than primarily upon brazing material between pipe/tube and socket are not covered by this practice.
Note 1: The dimensionless designator nominal pipe size (NPS) has been substituted in this practice for such traditional terms as “nominal diameter,” “size,” “nominal size,” and “iron pipe size.”
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 30-Nov-2019
- Technical Committee
- F25 - Ships and Marine Technology
- Drafting Committee
- F25.11 - Machinery and Piping Systems
Relations
- Effective Date
- 01-Dec-2019
- Effective Date
- 01-Mar-2024
- Effective Date
- 01-Apr-2020
- Effective Date
- 01-Apr-2019
- Effective Date
- 01-Mar-2018
- Effective Date
- 01-Oct-2016
- Effective Date
- 01-Sep-2016
- Effective Date
- 01-Nov-2015
- Effective Date
- 01-Sep-2015
- Effective Date
- 01-Mar-2015
- Effective Date
- 01-Nov-2014
- Effective Date
- 01-Oct-2014
- Effective Date
- 01-Sep-2014
- Effective Date
- 01-Apr-2014
- Effective Date
- 01-Mar-2014
Overview
ASTM F1076-19, "Standard Practice for Expanded Welded and Silver Brazed Socket Joints for Pipe and Tube," establishes requirements for producing reliable expanded welded and silver brazed socket joints, primarily for shipboard piping systems. This standard outlines recommended practices for joining two pipes or tubes of the same nominal pipe size (NPS) without the need for a fitting or butt weld. It covers both seamless copper, copper-nickel, stainless steel pipes and tubes within specified dimensions, with the aim of ensuring joint safety, performance, and durability under typical marine conditions.
Key Topics
- Applicability:
- Focuses on use with seamless copper tube, copper-nickel tube, copper water tube, and stainless steel pipe within specified size ranges.
- Only suitable for systems where joint safety and separation are proven through testing or precedent.
- Limitations:
- Not suitable for flammable or combustible fluids in high fire risk areas, or where service temperatures exceed 425°F (205°C).
- Excludes joints relying solely on a fillet weld rather than a primary brazing material.
- Materials Covered:
- Pipe and tube materials must meet specifications such as ASTM B75/B75M, B88, B466/B466M, and A312/A312M.
- Joint Types:
- Expanded welded socket joints
- Expanded silver brazed socket joints
- Joint Preparation and Installation:
- Guidelines on number of joints per length, preparation, alignment, and cleaning prior to joining.
- Minimum insertion lengths, gap requirements, and scribing for inspection are specified.
- Welding and Brazing Practices:
- Conformance to ASME Boiler and Pressure Vessel Code, Section IX, is required for all welding and brazing.
- Tolerance and Dimension Control:
- Specific maximum clearances and allowable wall thinning after expansion are stipulated.
Applications
- Marine Piping Systems:
- Widely applied in shipboard water, air, and inert gas piping systems where expanded welded or silver brazed joints provide mechanical strength and leak resistance.
- Industrial Piping Installations:
- Suitable for non-flammable, non-combustible service piping requiring robust mechanical joints without fittings.
- Maintenance and Repair:
- Frequently used for field repairs or system modifications when butt welding or specialized fittings are not feasible.
- Quality Assurance:
- Ensures consistent, inspectable joints meeting international shipbuilding and marine equipment standards.
Related Standards
- ASTM B75/B75M: Specification for seamless copper tube.
- ASTM B88: Specification for seamless copper water tube.
- ASTM B466/B466M: Specification for seamless copper-nickel pipe and tube.
- ASTM A312/A312M: Specification for seamless and welded austenitic stainless steel pipes.
- ASME Boiler and Pressure Vessel Code, Section IX: Welding and brazing qualifications.
- NAVSEA 0900-LP-001-7000: Fabrication and inspection guidelines for brazed piping systems.
- Title 46 Code of Federal Regulations: Regulatory requirements for marine piping systems.
ASTM F1076-19 is essential for professionals involved in marine piping design, fabrication, and inspection, helping ensure that expanded welded and silver brazed socket joints deliver reliability and safety in demanding environments. Compliance with this standard supports regulatory approval and can simplify maintenance and operation for shipbuilders and marine operators.
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Frequently Asked Questions
ASTM F1076-19 is a standard published by ASTM International. Its full title is "Standard Practice for Expanded Welded and Silver Brazed Socket Joints for Pipe and Tube". This standard covers: SIGNIFICANCE AND USE 3.1 Expanded welded socket joints may be used with the following pipe and tube: 3.1.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.1.4 Seamless Stainless Steel Pipe—2 NPS through 6 NPS, Schedules 5 and 10. 3.2 Expanded silver brazed socket joints may be used with the following tube: 3.2.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.3 Expanded welded and silver brazed socket joints may be used where experience or test has demonstrated that the joint is safe and suitable for design and operating conditions, and where adequate provision is made to prevent separation of the joint. SCOPE 1.1 This practice covers expanded welded and silver brazed socket joints for use on shipboard piping systems. 1.2 Expanded welded and silver brazed socket joints are to be used to join two pipes or tubes having the same NPS (see Note 1) without using a fitting or butt weld. 1.3 Brazed socket type joints are not intended for use on systems containing flammable or combustible fluids in areas where fire hazards exist or where the service temperature exceeds 425°F (205°C). 1.4 Brazed joints depending solely upon a fillet weld rather than primarily upon brazing material between pipe/tube and socket are not covered by this practice. Note 1: The dimensionless designator nominal pipe size (NPS) has been substituted in this practice for such traditional terms as “nominal diameter,” “size,” “nominal size,” and “iron pipe size.” 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
SIGNIFICANCE AND USE 3.1 Expanded welded socket joints may be used with the following pipe and tube: 3.1.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.1.4 Seamless Stainless Steel Pipe—2 NPS through 6 NPS, Schedules 5 and 10. 3.2 Expanded silver brazed socket joints may be used with the following tube: 3.2.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.3 Expanded welded and silver brazed socket joints may be used where experience or test has demonstrated that the joint is safe and suitable for design and operating conditions, and where adequate provision is made to prevent separation of the joint. SCOPE 1.1 This practice covers expanded welded and silver brazed socket joints for use on shipboard piping systems. 1.2 Expanded welded and silver brazed socket joints are to be used to join two pipes or tubes having the same NPS (see Note 1) without using a fitting or butt weld. 1.3 Brazed socket type joints are not intended for use on systems containing flammable or combustible fluids in areas where fire hazards exist or where the service temperature exceeds 425°F (205°C). 1.4 Brazed joints depending solely upon a fillet weld rather than primarily upon brazing material between pipe/tube and socket are not covered by this practice. Note 1: The dimensionless designator nominal pipe size (NPS) has been substituted in this practice for such traditional terms as “nominal diameter,” “size,” “nominal size,” and “iron pipe size.” 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM F1076-19 is classified under the following ICS (International Classification for Standards) categories: 23.040.60 - Flanges, couplings and joints. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM F1076-19 has the following relationships with other standards: It is inter standard links to ASTM F1076-87(2015)e1, ASTM A312/A312M-24, ASTM B75/B75M-20, ASTM B75/B75M-19, ASTM B466/B466M-18, ASTM B88-16, ASTM A312/A312M-16a, ASTM A312/A312M-15b, ASTM A312/A312M-15a, ASTM A312/A312M-15, ASTM A312/A312M-14b, ASTM A312/A312M-14a, ASTM B88-14, ASTM B466/B466M-14, ASTM A312/A312M-14. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM F1076-19 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F1076 − 19 An American National Standard
Standard Practice for
Expanded Welded and Silver Brazed Socket Joints for Pipe
and Tube
This standard is issued under the fixed designation F1076; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2.1 ASTM Standards:
1.1 This practice covers expanded welded and silver brazed
A312/A312M Specification for Seamless, Welded, and
socket joints for use on shipboard piping systems.
Heavily Cold Worked Austenitic Stainless Steel Pipes
1.2 Expanded welded and silver brazed socket joints are to
B75/B75MSpecification for Seamless Copper Tube
be used to join two pipes or tubes having the same NPS (see
B88Specification for Seamless Copper Water Tube
Note 1) without using a fitting or butt weld.
B466/B466M Specification for Seamless Copper-Nickel
Pipe and Tube
1.3 Brazed socket type joints are not intended for use on
2.2 Military Standards:
systems containing flammable or combustible fluids in areas
MIL-P-24691/3Pipe and Tube, Corrosion-Resistant, Stain-
where fire hazards exist or where the service temperature
less Steel, Seamless or Welded
exceeds 425°F (205°C).
MIL-T-16420Tube, Copper-Nickel Alloy, Seamless and
Welded
1.4 Brazed joints depending solely upon a fillet weld rather
MIL-T-24107Tube, Copper (Seamless)
than primarily upon brazing material between pipe/tube and
2.3 ASME Standard:
socket are not covered by this practice.
ASME Boiler and Pressure Vessel Code,Section IX
NOTE 1—The dimensionless designator nominal pipe size (NPS) has
2.4 Federal Standard:
been substituted in this practice for such traditional terms as “nominal
Code of Federal Regulations,Title 46
diameter,” “size,” “nominal size,” and “iron pipe size.”
2.5 NAVSEA Document:
0900-LP-001-7000Fabrication and Inspection of Brazed
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
Piping Systems
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3. Significance and Use
and are not considered standard.
3.1 Expanded welded socket joints may be used with the
1.6 This standard does not purport to address all of the
following pipe and tube:
safety concerns, if any, associated with its use. It is the
3.1.1 Seamless Copper Tube—2.375-in. (60-mm) outside
responsibility of the user of this standard to establish appro-
diameter through 6.625-in. (170-mm) outside diameter.
priate safety, health, and environmental practices and deter-
3.1.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm)
mine the applicability of regulatory limitations prior to use.
outsidediameterthrough6.625-in.(170-mm)outsidediameter.
1.7 This international standard was developed in accor- 3.1.3 SeamlessCopperWaterTube—2.125-in.(55-mm)out-
dance with internationally recognized principles on standard- side diameter through 4.125-in. (105-mm) outside diameter.
ization established in the Decision on Principles for the 3.1.4 Seamless Stainless Steel Pipe—2 NPS through 6 NPS,
Schedules 5 and 10.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This practice is under the jurisdiction of ASTM Committee F25 on Ships and Available from U.S. Government Printing Office, Superintendent of
Marine Technology and is the direct responsibility of Subcommittee F25.11 on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
Machinery and Piping Systems. www.access.gpo.gov.
Current edition approved Dec. 1, 2019. Published December 2019. Originally Available from American Society of Mechanical Engineers (ASME), ASME
ɛ1
approved in 1987. Last previous edition approved in 2015 as F1076–87 (2015) . International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
DOI: 10.1520/F1076-19. www.asme.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1076 − 19
3.2 Expanded silver brazed socket joints may be used with 4.2.2 Seamless Copper-Nickel Tube (90-10)—Specification
the following tube: B466/B466M, UNS Number C70600 and MIL-T-16420, UNS
3.2.1 Seamless Copper Tube—2.375-in. (60-mm) outside Number C70600, Class 200, annealed.
diameter through 6.625-in. (170-mm) outside diameter.
4.2.3 Seamless Copper-Nickel Tube (70-30)—Specification
3.2.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm)
B466/B466M, UNS Number C71500 and MIL-T-16420, UNS
outsidediameterthrough6.625-in.(170-mm)outsidediameter.
Number C71500, Class 200, annealed.
3.2.3 SeamlessCopperWaterTube—2.125-in.(55-mm)out-
4.2.4 Seamless Copper Water Tube—Specification B88,
side diameter through 4.125-in. (105-mm) outside diameter.
Type K, UNS Number C12200, drawn (see 5.3).
3.3 Expandedweldedandsilverbrazedsocketjointsmaybe
5. Procedure
usedwhereexperienceortesthasdemonstratedthatthejointis
safe and suitable for design and operating conditions, and
5.1 Install no more than two expanded joints in any 36-in.
where adequate provision is made to prevent separation of the
(915-mm) long section of pipe/tube and in no case allow a
joint.
pipe/tube expanded at both ends in lengths of less than 36 in.
5.2 Fabricate expanded joints on the ends of the pipe/tube
4. Materials and Manufacture
by use of an expanding machine.
4.1 Welded Socket Joint:
4.1.1 Seamless Copper Tube—Specification B75/B75M,
5.3 Expanded joints shall not be used on Class I piping
UNS Number C12200 and MIL-T-24107, UNS Number
systems as defined in 46CFR56.04 for United States Coast
C12200, light drawn (see 5.3).
Guard inspected and certified vessels.
4.1.2 Seamless Copper-Nickel Tube (90-10)—Specification
5.4 Perform a minimum of three expansions to ensure the
B466/B466M, UNS Number C70600 and MIL-T-16420, UNS
degree of expansion.
Number C70600, Class 200, annealed.
4.1.3 Seamless Copper-Nickel Tube (70-30)—Specification 5.5 Bevel the unexpanded end of pipe/tube 30 to 40° for
B466/B466M, UNS Number C71500 and MIL-T-16420, UNS copper-nickel alloy and 10 to 20° for stainless steel.
Number C71500, Class 200, annealed.
5.6 Clean the pipe/tube ends to be inserted into the silver-
4.1.4 Seamless Copper Water Tube—Specification B88,
brazedexpandedpipe/tubesocketandtheinteriorofthesocket
Type K, UNS Number C71500, drawn (see 5.3).
itself to a bright metal before insertion.
4.1.5 Seamless Stainless Steel Pipe—Specification A312/
5.7 Align pipe/tube ends concentrically as accurately as
A312M, UNS Number S30400 and S31600, MIL-P-24691/3,
possible, and preserve this alignment during the welding
UNS Number S30400 and S31600, Schedules 5 and 10.
process.
4.2 Silver-Brazed Socket Joint:
4.2.1 Seamless Copper Tube—Specification B75/B75M, 5.8 Provide a gap of approximately ⁄16 in. (1.5
...
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. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: F1076 − 87 (Reapproved 2015) F1076 − 19 An American National Standard
Standard Practice for
Expanded Welded and Silver Brazed Socket Joints for Pipe
and Tube
This standard is issued under the fixed designation F1076; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Keywords section was editorially added in May 2015.
1. Scope Scope*
1.1 This practice covers expanded welded and silver brazed socket joints for use on shipboard piping systems.
1.2 Expanded welded and silver brazed socket joints are to be used to join two pipes or tubes having the same NPS (see Note
1) without using a fitting or butt weld.
1.3 Brazed socket type joints are not intended for use on systems containing flammable or combustible fluids in areas where
fire hazards exist or where the service temperature exceeds 425°F (205°C).
1.4 Brazed joints depending solely upon a fillet weld rather than primarily upon brazing material between pipe/tube and socket
are not covered by this practice.
NOTE 1—The dimensionless designator nominal pipe size (NPS) has been substituted in this practice for such traditional terms as “nominal diameter,”
“size,” “nominal size,” and “iron pipe size.”
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A312/A312M Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
B75B75/B75M Specification for Seamless Copper Tube (Metric) B0075_B0075M
B88 Specification for Seamless Copper Water Tube
B466/B466M Specification for Seamless Copper-Nickel Pipe and Tube
2.2 Military Standards:
MIL-P-1144MIL-P-24691/3 Pipe, Pipe and Tube, Corrosion-Resistant, Stainless Steel, Seamless andor Welded
MIL-T-16420 Tube, Copper-Nickel Alloy, Seamless and Welded
MIL-T-24107 Tube, Copper (Seamless)
2.3 ASME Standard:
ASME Boiler Codeand Pressure Vessel Code, Section IX
This practice is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.11 on Machinery
and Piping Systems.
Current edition approved May 1, 2015Dec. 1, 2019. Published June 2015December 2019. Originally approved in 1987. Last previous edition approved in 20102015 as
ɛ1
F1076 – 87 (2010).(2015) . DOI: 10.1520/F1076-87R15.10.1520/F1076-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401,20401-0001,
http://www.access.gpo.gov.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1076 − 19
2.4 Federal Standard:
Title 46Code of Federal Regulations, Code of Federal RegulationsTitle 46
2.5 NAVSEA Document:
0900-LP-001-7000 Fabrication and Inspection of Brazed Piping Systems
3. Significance and Use
3.1 Expanded welded socket joints may be used with the following pipe and tube:
3.1.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.1.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.1.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter.
3.1.4 Seamless Stainless Steel Pipe—2 NPS through 6 NPS, Schedules 5 and 10.
3.2 Expanded silver brazed socket joints may be used with the following tube:
3.2.1 Seamless Copper Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.2.2 Seamless Copper-Nickel Tube—2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter.
3.2.3 Seamless Copper Water Tube—2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter.
3.3 Expanded welded and silver brazed socket joints may be used where experience or test has demonstrated that the joint is
safe and suitable for design and operating conditions, and where adequate provision is made to prevent separation of the joint.
4. Materials and Manufacture
4.1 Welded Socket Joint:
4.1.1 Seamless Copper Tube—Specification B75B75/B75M, UNS Number C12200 and MIL-T-24107, UNS Number C12200,
light drawn (see 5.3).
4.1.2 Seamless Copper-Nickel Tube (90-10)—Specification B466/B466M, UNS Number C70600 and MIL-T-16420, UNS
Number C70600, Class 200, annealed.
4.1.3 Seamless Copper-Nickel Tube (70-30)—Specification B466/B466M, UNS Number C71500 and MIL-T-16420, UNS
Number C71500, Class 200, annealed.
4.1.4 Seamless Copper Water Tube—Specification B88, Type K, UNS Number C71500, drawn (see 5.3).
4.1.5 Seamless Stainless Steel Pipe—Specification A312/A312M, UNS Number S30400 and S31600. MIL-P-1144,S31600,
MIL-P-24691/3, UNS Number S30400 and S31600, Schedules 5 and 10.
4.2 Silver-Brazed Socket Joint:
4.2.1 Seamless Copper Tube—Specification B75B75/B75M, UNS Number C12200 and MIL-T-24107, UNS Number C12200,
light drawn (see 5.3).
4.2.2 Seamless Copper-Nickel Tube (90-10)—Specification B466/B466M, UNS Number C70600 and MIL-T-16420, UNS
Number C70600, Class 200, annealed.
4.2.3 Seamless Copper-Nickel Tube (70-30)—Specification B466/B466M, UNS Number C71500 and MIL-T-16420, UNS
Number C71500, Class 200, annealed.
4.2.4 Seamless Copper Water Tube—Specification B88, Type K, UNS Number C12200, drawn (see 5.3).
5. Procedure
5.1 Install no more than two expanded joints in any 36-in. (915-mm) long section of pipe/tube and in no case allow a pipe/tube
expanded at both ends in lengths of less than 36 in.
5.2 Fabricate expanded joints on the ends of the pipe/tube by use of an expanding machine.
5.3 Expanded joints shall not be used on Class I piping systems as defined in 46CFR56.04 for United States Coast Guard
inspected and certified vessels.
5.4 Perform a minimum of three expansions to ensure the degree of expansion.
5.5 Bevel the unexpanded end of pipe/tube 30 to 40° for copper-nickel alloy and 10 to 20° for stainless steel.
5.6 Clean the pipe/tube ends to be inserted into the silver-brazed expanded pipe/tube socket and the interior of the socket itself
to a bright metal before insertion.
5.7 Align pipe/tube ends concentrically as accurately as possible, and preserve this alignment during the welding process.
1 1
5.8 Provide a gap of approximately ⁄16 in. (1.5 mm) (expanded welded socket joint, Fig. 1) and ⁄8 in. (3 mm) (expanded
silver-brazed joint, Fig. 2) between the end of the pipe/tube and the bottom of the socket by bottoming the pipe/tube and backing
off slightly before tacking.
5.9 The minimum insertion length shall be 1 in. (25 mm).
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