What is the difference between ERW and HFWThe main reason is that the principles are different. As the name suggests, resistance welding is a method in which the welding parts are combined and applied pressure through the electrode, and the resistance heat generated by the current passing...
|ERW Carbon Steel Pipe&Tube||Seamless Steel Pipe||Spiral welded pipe/SAWH Pipe|
|Scaffolding Pipe&Tube||Round Steel Pipe&Tube||Square Pipe/Square Hollow Section/SHS||Rectangular Pipe/Rectangular Hollow Section/SHS||Circular Hollow Section/CHS|
|Steel Pipe&Tube Size||OD||1 1/2'' (48.3MM)||1/2''-24''||20*20-500*500mm||20*30-500*400mm||1/2''-24''||1/2''-24''||219-2200mm|
|W.T||Type3 3.2mm Type4 4mm or Customized||0.5mm-16mm SCH10-SCH160||1.0mm-16mm||1.0mm-16mm||0.5mm-16mm SCH10-SCH160||SCH10-SCH160||4-25mm|
|Length||6m, 6.4m or customized||6m or customized|
|Steel Pipe&Tube Material||Q195, Q235, Q345, SS400, S235, S355,SS500,ST52, Gr.B, X42-X120|
|Steel Pipe&Tube Standard||EN39,BS1139||ASTM A53, API 5L, BS1387||EN10219, ASTM A500||EN10219, ASTM A500||EN10219, ASTM A500||ASTM A106, API 5L||API 5L|
|Steel Pipe&Tube Surface Treatment||Hot Dip Galvanized||Black Prime Oiled||Black Prime Oiled||Black Prime|
|Painted||Hot Dip Glvanized||Coating||Coating|
|Steel Pipe&Tube Usage||Scaffolding system, shoring system||Low pressure liquid, water, gas, oil, line pipe; construction, structure, fencing|
|Steel Pipe&Tube Pipe Ends||Plain end||Plain end||Plain end square cut||Plain end||Plain end||Plain end|
|Threaded end||Bevel end||Bevel end||Bevel end||Threaded end|
|Grooved end||Threaded end||Threaded end||Belled end|
|Grooved end||Grooved end|
|Steel Pipe&Tube End Prptector||Plastic pipe cap||Nil||Plastic cap|
|Iron protector||Iron protector|
|Steel Pipe&Tube Inspection||Hydraulic Testing, Eddy Current , Infrared Test|
|Steel Pipe&Tube Package||Bundle,|
|Steel Pipe&Tube Delivery||Container: 20'GP, 40'GP, 40'HC, 40'OT|
|Port of Shipment||Xin gang Port, Tianjin, China|
|Date of Delivery||According To The Quantity And Specification Of Each Order|
|Payment Terms||L/C T/T|
What is the difference between ERW and HFWThe main reason is that the principles are different. As the name suggests, resistance welding is a method in which the welding parts are combined and applied pressure through the electrode, and the resistance heat generated by the current passing through the contact surface of the joint and the adjacent area is used for welding.High-frequency welding: when high-frequency current passes through the metal conductor, it will produce two peculiar effects: skin effect and proximity effect. High-frequency welding is to use these two effects to carry out the welding of steel pipe. These two effects are the basis of realizing high-frequency metal welding.High frequency welding is to use the skin effect to make high frequency current energy concentrated on the surface of the workpiece;The proximity effect is used to control the location and range of the high frequency current flow path.The speed of the current is very fast, it can be in a very short time to the adjacent steel plate edge heating, melting, and through extrusion to achieve butt.
Product manufacturing process
Certifications of product
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.
Packaging and transportation
Why to choose us?
1.We provide products to our customers individual specifications and special needs with competitive price and best service.
2. Immediate respond
We will be 24/7 on line at your services. Provide one-to-one service with our sincerity.
3. Professional suggestions
We could provide you the professional suggestion with our expertise acumen.
4. Short delivery period
We are based on a long-term cooperation with several major domestic steel company with an outstanding advantage is sufficient supply. Shorter the supplying period.
Edit by Ms. Vicky of CSPG
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Tel / Whatsapp: +86-180327140146