ASTM-A758 Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness

ASTM-A758 - 2014 R19 EDITION - SUPERSEDED
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Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness

Scope

1.1 This specification covers wrought-carbon steel butt-welding seamless or welded fittings specially processed to ensure better notch toughness than that to be expected in fittings manufactured to the requirements of Specification A234/A234M.

1.1.1 Included are elbows, caps, tees, reducers, and other type fittings covered by ASME B 16.9.

1.1.2 Heat treatment is required for all fittings.

1.1.3 Fittings with mandatory radiographic examination of welds are included.

1.1.4 Supplementary requirements are provided for use when additional testing or examination is desired.

1.1.5 Cast fittings, and fittings formed from all weld metal, are not included.

1.2 Several type of fittings are provided, as follows:

Type Heat Treatment RequiredWeld Seam Finish ()Radiography Required?
30 normalize UW-35 no
31 normalize UW-35 yes
32 normalize UW-35 and ground flush yes
40 normalize and temperUW-35 no
41 normalize and temperUW-35 yes
42 normalize and temperUW-35 and ground flush yes
50 quench and temperUW-35 no
51 quench and temperUW-35 yes
52 quench and temperUW-35 and ground flush yes

1.3 It shall be the responsibility of the purchaser to determine whether material meeting the requirements of this specification is satisfactory for the service application.

1.4 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.

1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

Keywords

low; pipe fittings; piping applications; pressure containing parts; steel; temperature service applications; ICS Number Code 23.040.40 (Metal fittings)

To find similar documents by ASTM Volume:

01.01 (Steel--Piping, Tubing, Fittings)

To find similar documents by classification:

23.040.40 (Metal fittings)

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Document Number

ASTM-A0758_A0758M-14R19

Revision Level

2014 R19 EDITION

Status

Superseded

Modification Type

Revision

Publication Date

Dec. 1, 2019

Document Type

Specification

Page Count

5 pages

Committee Number

A01.22