What is ERW steel pipe?
ERW steel pipes are manufactured by low-frequency or high-frequency resistance "resistance". They are round pipes welded from steel plates with longitudinal welds. It is used to transport oil, natural...
What is HFW steel pipe?
It should be noted that HFW pipe is a type of ERW pipe.
High frequency welding (HFW) is a solid resistance heat energy. Through high-frequency current welding resistance, the heat generated in the co...
Differences Between ERW and HFW Steel Pipe
The first is to know the difference between ERW and HFW welding processes.
ERW welding process refers to the heat generated by the resistance of the current flowing through the connecting metal. The...
Matters Needing Attention in the Storage of Straight Seam Steel Pipes
Straight seam steel pipe is a kind of welded steel pipe. After forming a hot-rolled steel coil by a forming machine, the steel coil is transformed into a cylindrical shape. The high-frequency current ...
What Aspects Will be Affected by the Quality of Longitudinal Welded Pipes ?
The quality of straight seam welded pipe is a concern for users. Its quality is mainly composed of its own material, standard, wall thickness, weld and other factors. Under the same material and stand...
What are the Factors that Affect the Passivation Coating of Seamless Steel Pipes?
The factors that affect the passivation coating of seamless steel pipes mainly include the following four points: The passive film of seamless steel pipes is a suppressed metastable structure in therm...
