About butt welding pipe fitting suppliers some understanding

About butt welding pipe fitting suppliers some understanding? I'll take you to find out. Pipe fitting is the part that joins the pipe into a pipe. According to the connection method can be divided into socket-type pipe fittings, threaded pipe fittings, flange fittings and welded pipe fittings four categories. Multi-use and pipe the same material. Elbow (elbows), tee, four-way pipe (crosshead) and reducing pipe (size head) and so on. Elbows are used for pipe bends and turns; the tee pipe is used for the place where the three pipes are collected; the tee pipe is used for the place where the four pipes are collected; and the reducer pipe is used for the connection of the two pipes of different pipe diameters.

There are two main international standards for pipe flanges, that is, the European pipe flange system represented by the German DIN (including the former Soviet Union) and the American pipe flange system represented by the American ANSI pipe flanges. In addition, there are Japanese JIS pipe flanges, but generally only used for public works in petrochemical plants, and has a relatively small international impact.

Industry Standard:
1) "Butt Welded Seamless Steel Pipe" GB / T 12459-2005
2) "Butt welded pipe fittings" GB / T 13401-2005
3) "Steel welded pipe fittings" DL / T 695-1999
SH 3408 steel butt welded seamless pipe SH 3409 butt welded steel pipe fittings
SH 3410 forged steel socket weld pipe fittings
HGJ514-87 carbon steel, low alloy steel seamless pipe fittings