steel pipe

Welded in accordance with manufacturing processes can be divided into: straight seam welded steel pipes, submerged arc welding steel pipe, plate rolling butt welding pipe, welded steel pipe thermal expansion. In accordance with the shape of the pipe can be divided into square tubes, rectangular tubes, octagonal, hexagonal, D-shaped, pentagonal, etc. shaped steel tubing. That need to withstand the pressure of fluid and gas pipe must be carried out hydraulic pressure test and ray testing to test its internal pressure to withstand and steel quality (2 steel mechanical properties of steel is to ensure that end-use properties (mechanical properties) is an important indicator, it depends on the steel the chemical composition and heat treatment systems. in the steel standards, according to different usage requirements of the tensile properties (tensile strength, yield strength or yield point, elongation) and hardness, toughness index, as well as user requirements high, low-temperature performance, etc..) complex section steel - scalene hexagonal steel pipe, five plum-shaped steel pipe, steel double-convex, double concave steel pipe, melon-shaped steel pipe, cone-shaped steel pipe, corrugated steel pipe, steel case, other

Seamless steel tube manufacturing process can be divided into: hot rolled (extrusion), cold-rolled (pull),