Haihao Group manufacture & supply seamless steel pipes in different dimensions,materials,standards.The seamless steel pipes mean the steel pipes without seams on its surface.The following are the types of seamless steel pipes manufacturing process: Man ...

There are various ways for pipes,fittings,flanges and valves to connect,socket welding and butt welding are the two popular.However,you might be confused about what are the differences between socket welding and butt welding pipe fittings,and which one wou ...

What are ASME B16.11 socket welding fittings? Socket welding is a pipe connection in which pipes are inserted into the wall of a valve,fitting or flange and welded.In contrast to butt welding,socket welding is usually used for small diameter pipes of 2 inc ...

Galvanized steel pipe can increase the service life of steel pipe and prevent rust to a certain extent.This paper will introduce the classification and main application of galvanized pipes. One kind of galvanized pipe is hot-dip galvanized pipe.The molten ...

Submerged arc welding(SAW) is a method in which the arc is burned under the flux layer to weld.In the welding process,the arc is covered by flux,and the wire feeding and arc movement are automatically controlled by a mechanical device.The process is normal ...

Electric resistance welding refers to the method of using the resistance heat generated by the current passing through the welding part and the contact place as the heat source to heat up the part locally and pressurize the welding at the same time. API 5L ...

A105 is American ASTM standard number,”A” stands for common carbon structural steel.ASTM A105 is the most common carbon steel material under ASME/ANSI/API/MSS standard.It’s standard specification for carbon steel forgings for piping appli ...