General Fitting Standards

on 03 May 2016. Posted in Pipe Fitting

Fitting Standards

Some of the standards that apply to buttwelded fittings are listed below. Many organizations such as ASME, ASTM, ISO, MSS, etc. have very well developed standards and specifications for buttwelded fittings. It is always up to the designer to ensure that they are following the applicable standard and company specification, if available, during the design process.

Standards

ASME Standards

ASME B16.1 - Cast Iron Pipe Flanges and Flanged Fittings
ASME B16.3 - Malleable Iron Threaded Fittings
ASME B16.4 - Gray Iron Threaded Fittings
ASME B16.9 - Factory-Made Wrought Buttwelding Fittings
ASME B16.11 - Forged Fittings, Socket-Welding and Threaded
ASME B16.14 - Ferrous Pipe Plugs, Bushings, and Lock nuts With Pipe Threads
ASME B16.15 - Cast Bronze Threaded Fittings, Class125 and 250
ASME B16.18 - Cast Copper Alloy Solder Joint Pressure Fittings
ASME B16.22 - Wrought Copper and Copper Alloy Solder Joint Pressure Fittings
ASME B16.24 - Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and 2500
ASME B16.25 - Buttwelding Ends
ASME B16.26 - Cast Copper Alloy Fittings for Flared Copper Tubes
ASME B16.39 - MalleableIron Threaded Pipe Unions, Class 150, 250, and 300
ASME B16.42 - Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300

ASTM Standards

ASTM A105 / A105M - Specification for Carbon Steel Forgings for Piping Applications
ASTM A234 / A234M - Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
ASTM A403 / A403M - Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASTM A420 / A420M - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service

AWWA Standards

AWWA C110 - Ductile-Iron and Gray-Iron Fittings, 3 Inch Through 48 Inch (75 mm Through 1200 mm), for Water and Other Liquids
AWWA C208 - Dimensions for Fabricated Steel Water Pipe Fittings

ISO Standards

ISO 5251 - Stainless steel butt-welding fittings
ISO 5256 - Steel pipes and fittings for buried or submerged pipe lines -- External and internal coating by bitumen or coal tar derived materials

MSS Standards

MSS SP-43 - Wrought Stainless Steel Butt-Welding Fittings Including Reference to Other Corrosion Resistant Materials
MSS SP-75 - Specifications for High Test Wrought Buttwelding Fittings
MSS SP-73 - Brazing Joints for Copper and Copper Alloy Pressure Fittings
MSS SP-83 - Class 3000 Steel Pipe Unions, Socket-Welding and Threaded
MSS SP-97 - Integrally Reinforced Forged Branch Outlet Fittings — Socket Welding, Threaded, and Buttwelding Ends
MSS SP-106 - Cast Copper Alloy Flanges and Flanged Fittings Class 125,150, and 300
MSS SP-119 - Factory-Made Wrought Belled End Socket Welding Fittings