Abstract： ASME B16.5:2013 pdf download.Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard. 5 MATERIALS 5.1 General (a) Materiak required for flanges and flanged fittings are li%ted in Table IA with the restriction that plat...

ASME B16.5:2013 pdf download.Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard.

5 MATERIALS

5.1 General

(a) Materiak required for flanges and flanged fittings are li%ted in Table IA with the restriction that plate

materials shall be used only for blind flanges and ft-dueing flanges without hubs. Flanges and flanged fittings

shall be manufactured as one piece in accordance with the applicable matenal specification. Assembly of multi- pie pieces into the lintshed product by welding or other means Is not permitted by this Standard.

Ib) Recommended bolting materials arc listed in Table lB (see para 3).

(C) Corresponding materials listed in Sechon II of the ASME Boiler and Pressure Vessel Code may be used provided

that the requirements of the ASME specification are idenhcal to or more stringent than thc ASTM specification for

the Grade. Class, or type of material.

5.1.1 Application. Criteri.a for the selection of materials are not within 11w scope of this Standard. The pot’

sibility of material deterioration in service should be considered by the usei Carbide phase conversion to

graphite and excessive oxidation of femtic materials. susceptibility to intergranular corrosion of austenitic

materials, or grain boundary attack of nkkel base alloys are among those items requiring attention. A discussion

of precautionary considerations can be found in ASME B31.3. Appendix F; Section Il, Part D, Appendix A; and

Section III, DivIsion 1, Appendix W of the ASME Boiler and Pressure Vessel Code.

5.1.2 Toughness. Some of the materials listed in Table 1A undergo a decrease In toughness when used at low

temperatures, to the extent that Codes referencing the Standard may require impact tests for application even at

temperatures higher than —7°C (.20°F). It is the responsibility of the user to ensure that such testing is

performed.

5.1.3 ResponsibiLity. When service conditions dictate the implementation of special material requirements E.g.

using a Group 2 material above 538°C , it is the user ‘a responsibility to so specify to the  manufacturer in order to ensure compliance with metallurgical requirements listed in the notes in Tables 2-1.1

through 2-319 (Tables 11-2.1.1 through 11-2-3.19 of Mandatory Appendix 11).

5.1.4 Cast Surfaces. Cast surfaces of component pressure boundaries shall be in accordance with MSS SP-55, except that all T-pe I defects are unacceptable, and detects in excess of Plates ‘a” and “b” for Type H through Type XTI are unacceptable.

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