Domestic Socket Weld Fittings
Socket weld fitting has a socket or recess for the pipe to slip into. A back weld is applied to hold the pipe in the fitting. Socket Weld fittings are formed by using either the drop forge or upset forging method. They are forged solid and require complete machining.
Similar to the preparation of Socket Weld Flanges, an expansion gap of 1/16 inch (1.6 mm) between the pipe and the shoulder of the socket must be ensured by the welder.
ASME B31.1 para. 127.3 Preparation for Welding (E) Socket Weld Assembly says:
In assembly of the joint before welding, the pipe or tube shall be inserted into the socket to the maximum depth and then withdrawn approximately 1/16" (1.6 mm) away from contact between the end of the pipe and the shoulder of the socket.
All Domestic Socket Weld Fittings are made from material forged and machined in USA. All fittings are supplied with MTR for full traceability.
- A105 - The standard forged carbon steel piping components for ambient and high temperature / pressure systems (More Info)
- A20 - a "Super" stainless steels that was designed for maximum resistance to acid corrosion, cracking and pitting attack (More Info)
- SS304 - A common standard for stainless steel due to its malleability, high corrosive resistance weld-ability (More Info)
- SS316 - A molybdenum stainless steel that provides excellent tensile, creep and stress-rupture strengths at elevated temperatures (More Info)