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(1) The domestic casing pipe is in accordance with SY/T6194-96, and the length of the casing is not fixed, and its range is 8-13m. However, casings not shorter than 6 m can be supplied, and the number...

The electric resistance welded pipe (ERW steel pipe) is a method in which a weld is combined and pressure is applied through an electrode, and the electric current is welded by the electric resistance...

The welded square tube is a hollow square section steel square tube, also known as a hollow cold-formed steel. The utility model relates to a profiled steel of a square cross-sectional shape which is ...

J55 casing pipe is an important equipment for oil drilling. Its main equipment also includes drill pipe, core pipe and casing, drill collar and steel pipe for small diameter drilling. J55 oil casing s...

Reasons for cracks in seamless steel pipes: 1. The crack traverses the thickness direction of the slab. The crack in the central equiaxed grain region is a curved fine crack along the grain boundary. ...

Electric fusion welding is the joining of metals by heating the metal between one or several consumable electrodes and the workpiece.Electric resistance welding is a welding that uses a strong current...