Butt welded pipe fittings

Classification and common standards of butt welded pipe fittings

Butt welding pipe fittings are a type of pipe fittings with better quality made of welded pipes. They are widely used pipe fittings in the construction industry. They mainly include butt welding pipe fittings made of stainless steel, carbon steel, low alloy steel and alloy steel. Compared with ordinary welded pipe fittings, butt welded pipe fittings are more durable and are not prone to deterioration due to the influence of external environmental conditions. Butt welded pipe fittings play an indispensable role in construction projects and are the most popular applications for people. A relatively large number of welded pipe fitting products.

Classification of butt welded pipe fittings:

Commonly used butt welding pipe fittings are mainly divided into elbows, tees, reducers (big and small heads) and pipe caps. Among them, elbows, tees and reducers are mostly made of seamless pipes or welded steel pipes, which are made by pushing and drawing. , extruded, and the pipe caps are mostly made of steel plate stamping.

1. Elbow: Elbows are divided into long radius elbows and short radius elbows according to different sizes; according to different manufacturing methods, they are divided into push elbows, extrusion elbows and welded miter elbows.
2. Tee: According to different diameters, tees are divided into equal-diameter tees, reducing tees, and y-shaped tees.
3. Reducers: Reducers usually include concentric reducers and eccentric reducers.
4. Pipe caps: Pipe caps are usually divided into flat caps and standard oval caps. Among them, the flat cap is easier to manufacture and the price is lower, but its pressure-bearing capacity is not as good as the standard elliptical cap, so it is often used under the conditions of DN ≤ 100 and medium pressure below 1.0MPa. The standard elliptical pipe cap is an elliptical head with a folded edge. The ratio of the long and short axes of the inner diameter of the ellipse is 2:1. It is the most widely used head.

What are carbon steel butt welded pipe fittings?
Carbon steel butt welding pipe fittings are the most widely used material among butt welding pipe fittings. Carbon steel, also called carbon steel, refers to an iron-carbon alloy with a carbon content Wc of less than 2.11%. In addition to carbon, carbon steel generally contains small amounts of silicon, manganese, sulfur, and phosphorus.

Butt welded pipe fittings: One type is pipe fittings made of welded pipes. For pipe fitting manufacturers, the forming process of welded pipes is basically the same as that of seamless pipes. The forming process of butt welded pipe fittings does not include the welding process; the other is The welding process required for pipe fitting forming is completed by the pipe fitting manufacturer.

Butt welding flange: It is a kind of flange pipe fittings. It is widely used and promoted in different fields and industries. It has different applicable scopes and different environments. It needs to be used according to certain conditions. ,

Butt welding elbow: It is completed by welding two steel plates. Generally, large diameter elbows use this process. Generally, those with diameters above 600 are basically butt welding elbows.

Butt welding pipe fittings standards:

Commonly used standards for butt welding pipe fittings include: "Steel butt welding seamless pipe fittings" GB/T 12459-2005, "Steel plate butt welding pipe fittings" GB/T 13401-2005, "Steel butt welding pipe fittings for power stations" DL/T 695 —1999, SH 3408 steel butt welding seamless pipe fittings, SH 3409 steel plate butt welding pipe fittings, SH 3410 forged steel socket welding pipe fittings, HGJ514-87 carbon steel, low alloy steel seamless butt welding pipe fittings, ASME/ANSI B16 .9 Factory-made seamless steel pipe butt weld fittings, ASME/ANSI B16.11 socket weld and threaded forged fittings, ASME/ANSI B16.28 steel butt weld small radius elbows and return bends, ASME B16.5 pipe Flanges and Flange Fittings, MSS SP-43 Forged Stainless Steel Butt Weld Fittings, MSS SP-83 Socket Weld and Threaded Unions, MSS SP-97 Socket Weld, Threaded and Butt Weld Ends Integral Reinforced Pipe Holders, ASME B16.3-1998 Malleable cast iron threaded pipe.