ASTM A787/A787M-20a

Standard Specification for Electric-Resistance-Welded Metallic-Coated Carbon Steel Mechanical Tubing

ABSTRACT
This guide covers standard specification for round, square, rectangular, and special shape, electric-resistance-welded mechanical tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated (galvannealed), or aluminum-zinc alloy-coated steel sheet. Low-carbon steels and other carbon steels shall conform to the required chemical composition for carbon, manganese, phosphorus, and sulfur. The steels shall conform to elemental tolerances for product analysis. Wall thickness tolerances for premetallic coated as-welded tubing and diameter tolerances for metallic-coated round tubing shall be provided.
SCOPE
1.1 This specification covers round, square, rectangular, and special shape, electric-resistance-welded carbon steel mechanical tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated (galvannealed), 55 % aluminum-zinc alloy-coated, or zinc-aluminum-magnesium alloy-coated carbon steel sheet. Tubing for use as electrical conduit (EMT) or intermediate metallic conduit (IMC) is not covered by this specification.  
1.1.1 The product is available in various grades based on chemical requirements (Sections 5 and 9).  
1.1.2 The product is available in various Types (Section 3).  
1.2 This specification covers mechanical tubing with outside diameters or maximum outside dimensions ranging from 1/2 to 15 in. [12.7 to 380.0 mm] and wall thickness from 0.028 to 0.180 in. [0.70 to 4.60 mm]. Indeterminate wall thicknesses may be ordered. In those cases the more stringent tolerances of Tables 3, 4, 5, 6, 12 and 13 shall apply.  
1.3 When sizes within the ranges listed above are ordered, all other requirements of the specification shall be met.  
1.4 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 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: Historical
• Publication Date: 31-Oct-2020
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

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:A787/A787M −20a
Standard Specification for
Electric-Resistance-Welded Metallic-Coated Carbon Steel
1
Mechanical Tubing
This standard is issued under the fixed designationA787/A787M; 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.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers round, square, rectangular, and
special shape, electric-resistance-welded carbon steel mechani-
2. Referenced Documents
cal tubing, either zinc-coated (galvanized) after welding or
2
produced from aluminum-coated, zinc-coated (galvanized),
2.1 ASTM Standards:
zinc-iron alloy-coated (galvannealed), 55 % aluminum-zinc
A463/A463M Specification for Steel Sheet, Aluminum-
alloy-coated, or zinc-aluminum-magnesium alloy-coated car-
Coated, by the Hot-Dip Process
bon steel sheet. Tubing for use as electrical conduit (EMT) or
A653/A653M Specification for Steel Sheet, Zinc-Coated
intermediate metallic conduit (IMC) is not covered by this
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
specification.
by the Hot-Dip Process
1.1.1 The product is available in various grades based on
A792/A792M Specification for Steel Sheet, 55 %
chemical requirements (Sections 5 and 9).
Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
1.1.2 The product is available in various Types (Section 3).
A924/A924M Specification for General Requirements for
Steel Sheet, Metallic-Coated by the Hot-Dip Process
1.2 This specification covers mechanical tubing with out-
A1046/A1046M Specification for Steel Sheet, Zinc-
side diameters or maximum outside dimensions ranging from
1
Aluminum-MagnesiumAlloy-Coated by the Hot-Dip Pro-
⁄2 to 15 in. [12.7 to 380.0 mm] and wall thickness from 0.028
cess
to 0.180 in. [0.70 to 4.60 mm]. Indeterminate wall thicknesses
B6 Specification for Zinc
may be ordered. In those cases the more stringent tolerances of
Tables 3, 4, 5, 6, 12 and 13 shall apply.
3. Classification
1.3 When sizes within the ranges listed above are ordered,
all other requirements of the specification shall be met. 3.1 The types of tubing covered by this specification are:
Type Code Description
1.4 This specification is expressed in both inch-pound units
Number Letters
and in SI units; however, unless the purchase order specifies
the applicable M specification designation (SI units), the 1 AWAC electric-resistance-welded aluminum-
coated carbon steel mechanical tubing
inch-pound units shall apply. The values stated in either SI
2 AWG electric-resistance-welded galvanized
units or inch-pound units are to be regarded separately as
carbon steel mechanical tubing
standard. Within the text, the SI units are shown in brackets. 3 AWPG electric-resistance-welded carbon steel
mechanical tubing, post-hot dipped
The values stated in each system may not be exact equivalents;
galvanized
therefore,eachsystemshallbeusedindependentlyoftheother.
4 AWGA electric-resistance-welded carbon steel
mechanical tubing, zinc-iron alloy-
Combining values from the two systems may result in non-
coated (galvannealed)
conformance with the standard.
5 AWGZ electric-resistance-welded carbon steel
mechanical tubing, 55 % aluminum-zinc
1.5 This international standard was developed in accor-
alloy-coated
dance with internationally recognized principles on standard-
6 AWZAM electric-resistance-welded carbon steel
ization established in the Decision on Principles for the
mechanical tubing, zinc-aluminum-
magnesium alloy-coated
Development of International Standards, Guides and Recom-
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.09 on Carbon Steel Tubular Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2020. Published November 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1981. Last previous edition approved in 2020 as A787/A787M – 20. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0787_A0787M-20A. the ASTM website.
*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
1

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A787/A787M−20a
4. Ordering Information 5.2.2 Specification A653/A653M—Coating designation for
galvanized and galvannealed steel sheet.
4.1 The ordered wall thickness of the tubing s
...

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.
Designation: A787/A787M − 20 A787/A787M − 20a
Standard Specification for
Electric-Resistance-Welded Metallic-Coated Carbon Steel
1
Mechanical Tubing
This standard is issued under the fixed designation A787/A787M; 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.
1. Scope*
1.1 This specification covers round, square, rectangular, and special shape, electric-resistance-welded carbon steel mechanical
tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron
alloy-coated (galvannealed), 55 % aluminum-zinc alloy-coated, or zinc-aluminum-magnesium alloy-coated carbon steel sheet.
Tubing for use as electrical conduit (EMT) or intermediate metallic conduit (IMC) is not covered by this specification.
1.1.1 The product is available in various grades based on chemical requirements (Section(Sections 5 and 9).
1.1.2 The product is available in various Types (Section 3).
1
1.2 This specification covers mechanical tubing with outside diameters or maximum outside dimensions ranging from ⁄2 to 15 in.
[12.7 to 380.0 mm] and wall thickness from 0.028 to 0.180 in. [0.70 to 4.60 mm]. Indeterminate wall thicknesses may be ordered.
In those cases the more stringent tolerances of Tables 3, 4, 5, 6, 12 and 13 shall apply.
1.3 When sizes within the ranges listed above are ordered, all other requirements of the specification shall be met.
1.4 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order specifies the
applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or
inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated
in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the standard.
1.5 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
2.1 ASTM Standards:
A463/A463M Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.09
on Carbon Steel Tubular Products.
Current edition approved July 1, 2020Nov. 1, 2020. Published July 2020November 2020. Originally approved in 1981. Last previous edition approved in 20152020 as
A787/A787M – 15a.A787/A787M – 20. DOI: 10.1520/A0787_A0787M-20.10.1520/A0787_A0787M-20A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1

---------------------- Page: 1 ----------------------
A787/A787M − 20a
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
Hot-Dip Process
A792/A792M Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A924/A924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
A1046/A1046M Specification for Steel Sheet, Zinc-Aluminum-Magnesium Alloy-Coated by the Hot-Dip Process
B6 Specification for Zinc
3. Classification
3.1 The types of tubing covered by this specification are:
Type Code Description
Number Letters
1 AWAC electric-resistance-welded aluminum-
coated carbon steel mechanical tubing
2 AWG electric-resistance-welded galvanized
carbon steel mechanical tubing
3 AWPG electric-resistance-welded carbon steel
mechanical tubing, post-hot dipped
galvanized
4 AWGA electric-resistance-welded carbon steel
mechanical tubing, zinc-iron alloy-
coated (galvannealed)
5
...