What does EFW stand for in ASTM A672 carbon steel EFW welded pipe?
In ASTM A672 steel pipe, EFW stands for Electric-Fusion Welded. This is a manufacturing process that uses an electric arc to fuse the edges of steel plates together, forming a continuous weld.
What are the advantages of ASTM A672 EFW welded pipe compared to other steel pipes?
ASTM A672 EFW welded pipe offers advantages such as high strength, durability, and corrosion resistance, making it suitable for high-pressure and high-temperature applications. It is also more economical than seamless steel pipe and is available in a variety of sizes and wall thicknesses.
What are the different welding methods for ASTM A672 EFW welded pipe?
ASTM A672 EFW welded pipe is manufactured using electric fusion welding (EFW), a specific method that uses a high-frequency current to join steel plates.
What are the differences between the welding processes of resistance welding (ERW) and electric fusion welding (EFW) steel pipe?
ERW (Electrical Resistance Welding) utilizes resistance to generate localized heat at the joint. When the edges of two metal pieces come into contact, a high-frequency alternating current passes through, generating resistance heating. The material softens or partially melts, and then forging pressure (pressure rollers) is applied to fuse the edges together.
EFW (Electrical Resistance Welding) relies on an electric arc generated between the electrode and the workpiece. The arc melts the edges of the base material and filler metal, forming a molten pool. The molten pool solidifies upon cooling, forming a strong weld.
How to calculate the weight of ASTM A672 carbon steel EFW welded pipe?
To calculate the weight of resistance welded (EFW) pipe, you need to know the pipe's dimensions and material density. Here is a general formula for calculating the weight:
Weight = (Outer Diameter - Wall Thickness) × Wall Thickness × 0.02466 × Length × Density
Outer Diameter = Outer diameter of the pipe
Wall Thickness = Wall thickness of the pipe
Length = Length of the pipe
