Seamless square rectangular pipe is a kind of long steel with a hollow section and no joints around the perimeter. The tube is hollow, with a set cross-sectional area, a large number of pipelines used for conveying fluids, such as pipelines transporting oil, natural gas, gas, water and some solid materials, etc., the ring section is under internal or external radial pressure, the force is more uniform, therefore, the vast majority of steel pipes are round pipes. However, the round pipe also has certain limitations, such as under the condition of plane bending, the round pipe is not as strong as the square and rectangular pipe bending strength, and some agricultural machinery skeletons, steel and wood furniture are commonly used square and rectangular pipes.

Product information:

Enforce standards:

GB/T3094-2000 (national standard) cold-pressed shaped rectangular tube

GB/T6728-2002 (National standard) cold formed hollow section steel for structure

ASTM A500 (American Standard) Welded rectangular tubes and seamless rectangular tubes with carbon steel cold formed round and shaped sections for construction

EN10219-1-2006(European standard) non-alloy and fine grain cold formed welded hollow structure profiles

JIS G 3466 (day standard) angular rectangular tube for general construction

1. Classified by production method

Seamless pipe - hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, pipe jacking (2) Welded pipe (a) according to the process - arc welded pipe, resistance welded pipe (high frequency, low frequency), gas welded pipe, furnace welded pipe (b) according to the weld - straight seam welded pipe, spiral welded pipe

2. Classified by section shape

Simple section steel pipe - round steel pipe, square steel pipe, oval steel pipe, triangular steel pipe, hexagonal steel pipe, diamond steel pipe, octagonal steel pipe, semicircular steel pipe, other (2) complex section steel pipe - unequal hexagonal steel pipe, five valves, double convex steel pipe, double concave steel pipe, melon seed steel pipe, conical steel pipe, corrugated steel pipe, case steel pipe , Others

3, according to the wall thickness classification - thin wall steel pipe, thick wall steel pipe

4, classified by use - pipe, thermal equipment with steel pipe, mechanical industry with steel pipe, petroleum, geological drilling with steel pipe, container steel pipe, chemical industry with steel pipe, special purpose steel pipe, other