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ASME B31 .8 Gas
Transmission and Distribution Piping Systems
B31 .8 applies to regulating stations, gas
compressor stations, gas mains and service lines up to the end users meter
set.
ASME B31 .9 Building
Services
This Code covers building services for
heating and cooling water, condensing water, steam, vacuum, compressed air,
combustible liquids and nonflammable gases. Boiler external piping has a max of
15 psig for steam boilers and for water heating units the max is 160 psig and
250 F. There is a maximum size for materials. For example carbon steel can not
exceed 30" NPS or 0.50" wall. All welds must be VT although 100%
Penetrant is not required.
ASME Section IX Welding
and Brazing Qualifications
Section IX sets the requirements for writing
a Welding Procedure Specification (WPS), testing the WPS through a Procedure
Qualification Record and testing the weld through a Welder Performance
Qualification. All of the ASME Codes refer to this document.
AWS D1.1 Structural
Welding Code- Steel
Covers the design, welding and examination
of welded structural steel 1/8" and thicker. It allows for both
pre-qualified and non prequalified welding procedures.
AWS D1.2 Structural
Welding Code- Aluminum
Covers the welding of structural aluminum.
All procedures must be qualified before use. This Code does not contain any
pre-qualified welding procedures.
AWS D1.3 Structural
Welding Code- Sheet Steel
Covers the welding of structural sheet steel
less than 3/16".
AWS D1.6 Structural
Welding Code- Stainless Steel
This Code applies to the welding of
structural stainless steel.
AWS D1.5 Bridge Welding
Code
This Code covers the welding fabrication
requirements applicable to welded highway bridges. The Code does not apply to
steels that are less than 3mm in thickness.
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