Differences between ERW and HFW pipes
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What is the difference between ERW and HFW pipes? Are they just different English abbreviations for the same manufacturing process?
Has the poster made a mistake? ERW: Resistance welding; EFW: Electric fusion welding. Did the poster mistake EFW for HFW?
ERW: electric resistance welding – steel pipes welded by this method; HFW: high frequency welding – steel pipes welded using high-frequency methods; LFW: low frequency welding – steel pipes welded using low-frequency methods. ERW steel pipes are further divided into HFW and LFW types.
Hey, the answer is wrong, right? ERW includes HFI and HFW
ERW is a general term for electric resistance welded steel pipes; ERW stands for the first letters of the corresponding English words. Resistive welded steel pipes are divided into AC welding and DC welding types. Alternating current welding is further divided into low-frequency welding, medium-frequency welding, ultra-high-frequency welding, and high-frequency welding based on different frequencies. High-frequency welding is mainly used in the production of thin-walled pipes or pipes with normal wall thickness. High-frequency welding is further divided into contact welding and induction welding. DC welding is generally used for small-diameter steel pipes. Therefore, in summary, high-frequency welded pipes are included within ERW welded pipes; they are a type of ERW welded pipe produced using the high-frequency welding process.
I was exactly wondering about this; I studied * it
Hello, may I ask what kind of tube HFI is? I can’t find any information about it
HFW specifically refers to ERW with a welding current of over 70KHz!
Was looking for this information; it resolved my doubts. Thank you!