Differences between seamless steel pipes and welded pipes-Hebei Allland steel pipe manufacturing Co., Ltd.

Differences between seamless steel pipes and welded pipes

Steel pipes with welds are called welded pipes, which are divided into straight seam welded pipes and spiral welded pipes according to the welding seam.

1、 Classification of pipes

1. Classification by production method (1) Seamless pipe - hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe jacking (2) Welded pipe (a) by process - arc welded pipe, resistance welded pipe (high-frequency, low-frequency), gas welded pipe, furnace welded pipe (b) by weld seam - straight seam welded pipe, spiral welded pipe

2. Classified by section shape (1) Simple section steel pipes - round steel pipes, square steel pipes, elliptical steel pipes, triangular steel pipes, hexagonal steel pipes, rhombic steel pipes, octagonal steel pipes, semicircular steel pipes, others (2) Complex section steel pipes - unequal hexagonal steel pipes, five petal Quincunx shaped steel pipes, double convex steel pipes, double concave steel pipes, melon seed shaped steel pipes, conical steel pipes, corrugated steel pipes, watch case steel pipes, others

3. Classification by wall thickness - thin-walled steel pipes, thick walled steel pipes

4. Classified by purpose - steel pipes for pipelines, steel pipes for thermal equipment, steel pipes for mechanical industry, steel pipes for petroleum and geological drilling, container steel pipes, steel pipes for chemical industry, special purpose steel pipes, and others.

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Differences between seamless steel pipes and welded pipes

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