API 5L GRb Lsaw Steel Pipe: It is a spiral seam steel pipe welded by the double-wire double-side submerged arc welding process, which takes the strip coil as the raw material and is often warm extruded. Submerged arc welded pipe features: straight seam welded pipe production process is simple, high production efficiency, low cost, rapid...

WN Flange is generally made by forging or forging. When using steel or steel manufacturing, must meet the following requirements: 1, the welding flange should be ultrasonic testing, no delamination defects; 2, should be cut along the direction of steel rolling into a strip, the bending system welded into a ring, and the surface of the steel...

"DIN" and "ANSI flanges", the temperature-pressure rating is determined by comparing the performance of Chinese materials with European materials and American materials, using the pressure-temperature parameters of the corresponding materials specified in ISO 7005-1.   High-quality products    ...