ASTM A787/A787M-15
(Specification)Standard Specification for Electric-Resistance-Welded Metallic-Coated Carbon Steel Mechanical Tubing
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 mechanical tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated (galvannealed), or 55 % aluminum-zinc alloy-coated steel sheet. Tubing for use as electrical conduit (EMT) or intermediate metallic conduit (IMC) is not covered by this specification.
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].
1.3 Sizes outside the ranges listed above may be ordered provided all other requirements of the specification are 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.
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Designation:A787/A787M −15
StandardSpecification 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* by the Hot-Dip Process
A792/A792M Specification for Steel Sheet, 55 %
1.1 This specification covers round, square, rectangular, and
Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
special shape, electric-resistance-welded mechanical tubing,
A924/A924M Specification for General Requirements for
either zinc-coated (galvanized) after welding or produced from
Steel Sheet, Metallic-Coated by the Hot-Dip Process
aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-
B6 Specification for Zinc
coated (galvannealed), or 55 % aluminum-zinc alloy-coated
steel sheet. Tubing for use as electrical conduit (EMT) or
3. Classification
intermediate metallic conduit (IMC) is not covered by this
specification.
3.1 The types of tubing covered by this specification are:
Type Code Description
1.2 This specification covers mechanical tubing with out-
Number Letters
side diameters or maximum outside dimensions ranging from
1
⁄2 to 15 in. [12.7 to 380.0 mm] and wall thickness from 0.028
1 AWAC electric-resistance-welded aluminum-
coated carbon steel mechanical tubing
to 0.180 in. [0.70 to 4.60 mm].
2 AWG electric-resistance-welded galvanized
1.3 Sizes outside the ranges listed above may be ordered carbon steel mechanical tubing
3 AWPG electric-resistance-welded carbon steel
provided all other requirements of the specification are met.
mechanical tubing, post-hot dipped
galvanized
1.4 This specification is expressed in both inch-pound units
4 AWGA electric-resistance-welded carbon steel
and in SI units; however, unless the purchase order specifies
mechanical tubing, zinc-iron alloy-
the applicable M specification designation (SI units), the
coated (galvannealed)
5 AWGZ electric-resistance-welded carbon steel
inch-pound units shall apply. The values stated in either SI
mechanical tubing, 55 % aluminum-zinc
units or inch-pound units are to be regarded separately as
alloy-coated
standard. Within the text, the SI units are shown in brackets.
The values stated in each system may not be exact equivalents;
4. Ordering Information
therefore,eachsystemshallbeusedindependentlyoftheother.
4.1 The ordered wall thickness of the tubing shall be the
Combining values from the two systems may result in non-
total of the base metal and the metallic coating.
conformance with the standard.
4.2 Orders for material under this specification shall in-
2. Referenced Documents
clude the following:
2
4.2.1 Quantity (feet, metres, or number of lengths),
2.1 ASTM Standards:
A463/A463M Specification for Steel Sheet, Aluminum- 4.2.2 Type, code letters, and description (Sections 1 and 3),
Coated, by the Hot-Dip Process 4.2.3 Applicable ASTM designation number(s),
A653/A653M Specification for Steel Sheet, Zinc-Coated
4.2.4 Coating designation and type of coating,
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
4.2.5 Chemically treated or not chemically treated raw
material,
1 4.2.6 Oiled or dry (Section 16),
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.2.7 Extra smooth coating (if required),
A01.09 on Carbon Steel Tubular Products.
4.2.8 Customer application, including fabrication,
Current edition approved May 1, 2015. Published May 2015. Originally
4.2.9 Flash condition (7.1),
approved in 1981. Last previous edition approved in 2014 as A787/A787M – 14.
DOI: 10.1520/A0787_A0787M-15.
4.2.10 Steel grade designation (Sections 5 and 9),
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2.11 Report of chemical analysis if required (Sections 10
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and 11),
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.2.12 Shape (round, square, rectangular, or special),
*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−15
4.2.12.1 Dimensions: round—any two of the following: and Table 2, may be used as the precoated material for the steel
inside diameter, outside diameter, or wall thickness; square or tubing upon agreement between the manufacturer and the
rectangular—outside d
...
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 − 14 A787/A787M − 15
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 mechanical tubing, either
zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated
(galvannealed), or 55 % aluminum-zinc alloy-coated steel sheet. Tubing for use as electrical conduit (EMT) or intermediate
metallic conduit (IMC) is not covered by this specification.
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].
1.3 Sizes outside the ranges listed above may be ordered provided all other requirements of the specification are 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A463/A463M Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
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
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 AWGZ electric-resistance-welded carbon steel
mechanical tubing, 55 % aluminum-zinc
alloy-coated
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 May 1, 2014May 1, 2015. Published May 2014May 2015. Originally approved in 1981. Last previous edition approved in 20092014 as
A787/A787M – 09.A787/A787M – 14. DOI: 10.1520/A0787_A0787M-14.10.1520/A0787_A0787M-15.
2
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.
*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 − 15
4. Ordering Information
4.1 The ordered wall thickness of the tubing shall be the total of the base metal and the metallic coating.
4.2 Orders for material under this specification shall include the following:
4.2.1 Quantity (feet, metres, or number of lengths),
4.2.2 Type, code letters, and description (Sections 1 and 3),
4.2.3 Applicable ASTM designation number(s),
4.2.4 Coating designation and type of coating,
4.2.5 Chemically treated or not chemically treated raw material,
4.2.6 Oiled or dry (Section 16),
4.2.7 Extra smooth coating (if required),
4.2.8 Customer application, including fabrication,
4.2.9 Flash condition (7.1),
4.2.10 Steel grade designation (Sections 5 and 9),
4.2.11 Report of
...
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