ASTM A671 CC70 Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
EFW (Electric Fusion Welding) 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 workpiece so that the workpiece leaving the melt, the formation of the weld.
EFW steel pipe is formed by rolling plate and welding the seam. The weld flash can be removed from the outside or inside surfaces using a scarfing blade. The weld zone can also be heat treated to make the seam less visible. Welded pipe often has tighter dimensional tolerances than seamless, and can be cheaper if manufactured in the same quantities.
It 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 it has a requirement on a special welding room because welding using X-rays.
Manufacturing machine for efw steel pipe: A combination of specially designed equipments like 1600MT press brake machine, multiple rolls bending machine, welding installations for outside, inside and circumferential welding, size calibrating press, solution annealing furnace and a host of other related machinery, is employed to manufacture pipes used in critical applications like refineries, fertilizers, LNG terminals, cross country pipe lines etc.
|Type||ASTM A671 Gr. CC60/ CC65/ CC70 LSAW / SAW / EFW PIPE|
|Executive Standard||API SPEC 5L,GB/T 9711.1,GB/T 9711.2,GB/T 9711.3,SY/T5037|
|ASTM A671||Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures|
|ASTM A672||Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures|
|Size||Outer Diameter||Seamless 17-914mm 3/8-36 inch LSAW 457-1422mm 18-56 inch|
|Wall Thickness||2-60mm SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80 SCH100 SCH120 SCH140 SCH160 XXS|
|Length||Single random length/Double random length 5m-14m,5.8m,6m,10m-12m,12m or as customer’s actual request|
|Ends||Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc|
|Surface Treatment||Bare,Painting black,varnished,galvanized,anti-corrosion PE PP/EP/FBE coating|
|Testing Methods||Eddy current testing, Hydrostatic testing or Ultrasonic examination, NDT and also with chemical and physical property inspection|
|Packaging||Small pipes in bundles with strong steel strips,large pieces in loose; Covered with plastic woven bags; Suitable for lifting operation; Loaded in 40ft or 20ft container or in bulk Also according to customer’s requests|
|Application||Conveying oil, gas and water|
|Production Capacity||5000 T/M|
|Delivery Time||Within 2 Weeks|
|Specification||Steel grade||Chemical composition||Remarks|
|Pipes for pressure service ASTM A671, A672||-/A45||-/0.17||–||0.98||0.035||0.035||–||A671/A672|
|Products||Steel Grade||BASE METAL MECHANICAL COMPOSITION||Welding point tensile strength (N/mm2)|
|Yield point (N/mm2)||Tensile Stregth (N/mm2)||Test Pieces||Elongation (%)|
|Pipes for pressure service ASTM A671, A672||-/A45||-/165||-/310~450||–||-/30||-/310~450|