Electric Fusion Welding Pipe(EFW steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the work piece so that the work piece leaving the melt, the formation of the weld. lt is mainly used for welding dissimilar steel welding sheet or which high power density, metal weldment can rapidly heated to high temperatures, which can melt any refractory metals and alloys. Deep penetration welding fast, heat-affected zone is extremely small so small performance impact on the joints, the joint almost no distortion. But EFW welding steel pipe has a requirement on a special welding room because welding using X-rays.
Stainless Steel EFW Pipes & Tubes: ASTM A - 270, 249, 312, 269, 213, 268, 358 304, 304L, 316, 316L, 317L, 321, 316 Ti, 309, 310, 904L, 410, 420, 430, 431, 202, etc
Carbon Steel EFW Pipes & Tubes : ASTM A106, IS1239, IS3589, Api 5L, ASTM A106, IS1239, IS3589, Api 5L.
Alloy Steel EFW Pipes & Tubes : ASTM A691, ASME SA691, CM 65, CM 70, CM 75, CMSH 70, CMSH 75, STM A691 Grade 1CR Grade-12, 1.1/4CR Grade 11, 2.1/4CR Grade 22, 3CR Grade 21, 5CR Grade 5, 9CR Grade 9, Grade 91.
Outside Diameter:14"OD to 72" OD
Wall thickness: 8.0mm-200mm
Length: 4-12.5m
Uses: Used for Pressure vessel pipeline.
ASTM A53 |
Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless |
API 5L |
Specification for Line Pipe(Two levels PSL 1 and PSL 2 of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.) |
A252 |
Standard Specification for Welded and Seamless Steel Pipe Piles |
A500 |
Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes |
A139 |
Standard Specification for Electric-Fusion (Arc)-Welded Steel Pipe (NPS 4 and Over) |
A672 |
Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures |
A691 |
Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
1. Pressure pipes
2. Oil Pipe, Gas pipes
3. Fluid Pipe, water pipe
4. Boiler Tubes
5. Structure Pipe, construction pipe
6. Fertilizer tube