Steel pipe section shape classification

    The steel types and varieties of steel pipe products are various, and their performance requirements are also various. All of these should be distinguished as user requirements or working conditions change. Generally, steel pipe products are classified according to section shape, production method, pipe material, connection method, plating characteristics and uses. Steel pipe according to the cross-section shape can be divided into: round steel pipe and shaped steel pipe. Shaped steel pipe refers to a variety of non-circular circular section of steel pipe. 

     The main ones are: Square tube, rectangular tube, oval tube, flat elliptic tube, semicircular tube, hexagonal tube, hexagonal inner tube, unequal hexagonal tube, equilateral triangular tube, pentagonal tube, octagonal tube, Convex tube, double convex tube, double concave tube, multi-concave tube, melon seed tube, flat tube, diamond tube, star tube, parallelogram tube, ribbed tube, drop tube, inner fin tube, twisted tube, B-type tube, D-type tube and multi-layer tube. According to the profile shape of the steel pipe is divided into: equal section steel pipe and variable section steel pipe. Variable section (or variable section) steel pipe refers to the steel pipe with periodic or non-periodic changes in the section shape, internal and external diameter and wall thickness along the long direction of the pipe. It mainly includes: outer conical tube, inner conical tube, outer step tube, inner step tube, periodic section tube, bellows, spiral tube, steel pipe with heat sink and gun barrel with double wire.