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ASME B16.25

BUTTWELDING ENDS

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Organization: ASME
Publication Date: 15 September 1979
Status: inactive
Page Count: 24
scope:

This standard covers the preparation of buttwelding ends of pipe, valves, welding neck flanges, and pipe fittings, but is equally applicable to other piping components which are connected into the piping system by butt welding.

Materials of piping components for which these welding ends are primarily intended are carbon and alloy steels. They may also be used for nonferrous materials, upon satisfactory qualification of the welding procedures for the particular material.

This standard includes requirements for reentrant shapes for heavy wall ends, welding bevel profiles, inside contours for joints made with or without bachgrings, and internal end machining dimensions with their tolerances. The preparation for backing rings, if any, must be specified in ordering material to this standard.

This standard covers welding and preparation for four general types of joints, but does not prescribe specific types of welding processes nor procedures.

The four types of joints are those using:

a) no backing rings

b) split or noncontinuous backing rings

c) solid or continuous backing rings

d) consumable insert rings. 

This standard also covers welding end preparations for Gas Tungsten Arc Welding (GTAW) of the root pass

Document History

December 29, 2017
Buttwelding Ends
General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and...
January 1, 2012
Buttwelding Ends
General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements forwelding bevels, for external and...
January 1, 2007
Buttwelding Ends
General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements forwelding bevels, for external and...
November 30, 2003
Buttwelding Ends
General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and...
May 30, 1997
Buttwelding Ends
General This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and...
January 1, 1992
Buttwelding Ends
A description is not available for this item.
October 8, 1986
BUTTWELDING ENDS
A description is not available for this item.
ASME B16.25
September 15, 1979
BUTTWELDING ENDS
This standard covers the preparation of buttwelding ends of pipe, valves, welding neck flanges, and pipe fittings, but is equally applicable to other piping components which are connected into the...
January 1, 1964
Buttwelding Ends
This standard covers the preparation of buttwelding ends of pipe, valves, welding neck flanges, and pipe fittings, but is equally applicable to other piping components which are connected into the...

References

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