Difference between straight seam steel pipe and seamless steel pipe

The classification is different

1.Straight seam steel pipe: it is divided into metric electric welding steel pipe, electric welding thin wall pipe and transformer cooling oil pipe

2.Seamless steel pipe: seamless pipe is divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe jacking, etc. According to the cross-section shape, seamless steel pipe can be divided into round and special-shaped, and the special-shaped pipe has many complex shapes, such as square, oval, triangle, hexagon, melon seed, star and winged pipe.

Straight seam steel pipes

Straight seam steel pipes

The concept is different

1.Straight seam steel pipe: the straight seam steel pipe is the steel pipe whose weld seam is parallel to the steel pipe longitudinally.

2.Seamless steel pipe: made by the whole piece of metal, no seam on the surface of the steel pipe, known as seamless steel pipe.

API 5L PSL2 X65 seamless steel pipes

API 5L PSL2 X65 seamless steel pipes

Different uses

1.Straight seam steel pipe: straight seam steel pipe is mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction. For liquid transportation: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structure: pile driving pipe, bridge, wharf, road, building structure pipe, etc.

2.Seamless steel pipe: seamless steel pipe has hollow cross-section and is widely used for conveying fluid, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, the steel tube is lighter in weight when the bending and torsion strength is the same, so it is a kind of economic section steel.

Haihao Group manufacture straight seam steel pipe and seamless steel pipe products more than 30 years, the products sells well all over the world for the high quality. If you have any question,please contact us! Email:sales@haihaogroup.com