Classification by section shape

There are many kinds and specifications of steel pipe products, and their performance requirements are various. All these should be differentiated according to user requirements or working conditions. Usually, steel pipe products are classified according to section shape, production method, pipe material, connection mode, plating characteristics and application.Forged Flange Suppliers

The steel pipe can be divided into round steel pipe and special-shaped steel pipe according to the cross-section shape.

Special-shaped steel pipe refers to a variety of non-circular section of the steel pipe. Among them are square tube, rectangular tube, elliptical tube, flat ellipsoid tube, semicircle tube, hexagonal tube, six angle inner tube, hexagonal tube, equilateral triangle tube, five angle plum blossom tube, octagonal tube, convex shape tube and double convex tube. Double concave tube, multi concave tube, melon seed tube, flat tube, diamond tube, star tube, parallel quadrilateral tube, ribbed tube, drop tube, inner fin tube, twisted tube, B tube, D tube and multi-layer tube, etc.

According to the longitudinal section shape, the steel pipe is divided into equal section steel pipe and variable section steel pipe. Variable cross-section (or variable cross-section) steel pipe refers to the steel pipe with periodic or non-periodic changes in cross-section shape, internal and external diameter and wall thickness along the length direction. The main features are: outer cone tube, inner cone tube, outer step tube, inner step tube, periodic section tube, bellows, spiral pipe, steel tube with heat sink and barrel with compound line.http://www.dtflanges.com/