loilfan
Mechanical
- Jan 20, 2015
- 122
We are trying to design a fitting that is used as a mixer to ASME VIII, Div 1. It is bolted together and is not part of a piping system as it is used in a testing facility. It has various ports in it and the mixer/mixer shaft so we are not able to use standard components.
We were looking at using SA-182 F316, but the ASTM standard for SA-182 in Sec IIA references SA-961 "Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications". SA-961 6.1.1 says "Bar - Flanges, elbows, return bends, tees, and header tees shall not be machined directly from bar."
Why is SA-182 F316 an acceptable material for a flange as per B16.5, but is an unacceptable material if we machined a flange-like component?
We were looking at using SA-182 F316, but the ASTM standard for SA-182 in Sec IIA references SA-961 "Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications". SA-961 6.1.1 says "Bar - Flanges, elbows, return bends, tees, and header tees shall not be machined directly from bar."
Why is SA-182 F316 an acceptable material for a flange as per B16.5, but is an unacceptable material if we machined a flange-like component?