Types and Standards of Steel Butt-Welded Pipe Fittings

　　Steel butt-welded pipe fittings are manufactured from seamless pipes, welded pipes, or steel plates. They come in a wide range of sizes and thicknesses, making them widely used in industries such as petroleum, natural gas, water conservancy, shipbuilding, and construction.

　　I. Classification:

　　Commonly used butt-welded pipe fittings are mainly classified into: elbows, tees, reducers, caps, flanged short sections, and bends. Elbows, tees, crosses, reducers, and bends mostly use seamless or welded steel pipes as raw materials, formed through pushing, drawing, or extrusion. Caps are mostly made from stamped steel plates.

　　1. Elbows: Common types include long-radius elbows and short-radius elbows based on bending radius; common types include 90-degree elbows, 45-degree elbows, and 180-degree elbows based on bending angle.

　　2. Tees: Classified by diameter into equal-diameter tees, reducing tees, and oblique tees.

　　3. Cross: Classified by diameter into equal-diameter crosses and reducing crosses.

　　4. Reducer: Also known as a reducer, typically available in concentric and eccentric types.

　　5. Cap: Usually divided into flat caps and standard oval caps.

　　6. Stub End: Divided into long and short stub ends.

　　7. Bend: A bend with a bending radius greater than 3D, consisting of straight pipe sections at both ends.

　　Common Size Range: Outer diameter: 1/2””DN15” to 48”DN1200”, Wall thickness: SCH10S, SCH20, SCH40, STD, SCH80, SCH100, SCH120, SCH160, SCHXXS. II. Standards

　　Common standards for butt-welded pipe fittings include: ASME B16.9, GB/T 12459, GB/T 13401, MSS SP-43, GB/T 10752, SH3408, SH3409, HG/T 21635, HG/T 21631, SY/T 0510, DL/T 695/EN 10253, DL/T 515, SY/T 5257, ASME B16.49, etc.

　　III. Materials

　　Common materials include: carbon steel, stainless steel, alloy steel, etc. ASTM A234 WPB, WP5, WP91, WP11, WP12, WP22; A403 WP304/L, 316/L, WP310S, WP904L; A860 WPHY42, WHPY52, WPHY60, WHPY65, WPHY70; A420 WPL6;

　　Shengtian Group provides a variety of butt-welded pipe fittings. We always adhere to the principle of quality first and serve every new and old customer. Welcome to visit our factory. Email: sale@stpipefitting.cn