Advances since the 1970s in materials, process control and non-destructive testing allow correctly specified welded pipe to replace seamless in many applications. Welded (also Electric Resistance Welded ("ERW"), and Electric Fusion Welded ("EFW")) 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. SEKO Machinery Co.Ltd. is the most professional HF Welded Pipe Making Equipment manufacturer in China.
There are a number of processes that may be used to produce ERW pipes. Each of these processes leads to coalescence or merging of steel components into pipes. Electric current is passed through the surfaces that have to be welded together; as the components being welded together resist the electric current, heat is generated which forms the weld. Pools of molten metal are formed where the two surfaces are being connected as strong electric current is passed through the metal; these pools of molten metal form the weld that binds the two connected components.
Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
www.gdseko.com
Email:sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery
Skype:Lucy Xie,SEKO Machinery
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stainless steel pipes
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