ASTM Grades of Alloy steel buttweld pipe fittings: What are they?

Pipes, fittings, and flanges manufactured according to ASTM standards have a chemical composition determined by percentages of the permitted quantities of carbon, magnesium, nickel, etc., as shown by "Grade".

Welding Buttweld Fittings in Alloy Steel:

This types of metal fittings pipe allows the direction of flow to be changed, the pipe size to be reduced or auxiliary equipment to be attached. The fittings are permanently leak proof because of its many inherent advantages. This system is reinforced by the continuous metal structure that forms between the fitting and pipe.

Alloy Steel Weld Fittings:

It refers to the process of inserting a pipe into recessed areas of valves, fittings, or flanges. For piping with a nominal diameter of NPS 2 or smaller, it is primarily used for small pipe diameters. Stainless steel has a tensile strength of 758-1882 MPa, whereas carbon steel has a strength of 758-1882 MPa.

What is ASTM A234 WPB

This standard is an ASTM A234 which specifies the 3r elbow dimensions and a234 materials of steel elbow for pipe fittings for moderate and high-temperature applications ranging from mild steel to alloy steel. The scope of the document covers both  and welded steel fittings.

1. A106▸ Covers high-temperature carbon steel pipe. 2. A335▸ Ferritic alloy-steel seamless pipes for high temperatures are covered by this specification. 3. A333▸ Carbon and alloy steel seamless and welded pipes intended for low temperature service are covered by this specification. 4. A312▸ Stainless steel pipe for high-temperature and general corrosive applications that cannot be welded using any type of welding process, whether seamless, straight-seam welded, or cold worked welded.