Seamless steel pipe
is a kind of long steel with hollow section and no joints. Smls pipe is used for conveying fluid pipe, structure with seamless steel tubes, compared to the solid round steel, in the bending torsional strength phase at the same time, the weight is lighter, is a kind of economic cross section steel, widely used in the manufacturing of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding and so on.
Smls pipe made of high quality carbon steel or alloy steel, hot-rolled, cold-rolled (pull) of the points.
1. there are many types of Construction: pipeline transportation, floor covering, floor water heating, and hot water transportation.
2. processing, bearing sleeve, processing machine parts and so on.
3. electrical types: gas pipeline, water pipeline.
4. wind power plant antistatic tube.
There are many ways to produce smls pipe. According to the delivery requirements, available hot rolling (about 80 ~ 90%) or cold rolling, cold drawing (about 10 ~ 20%) method of production. The billet for the hot rolled tube has round, square or polygonal ingots, billet or cast billet, and the quality of the billet has a direct effect on the quality of the pipe. Hot-rolled tube has three basic processes: ① in the punching machine on the ingot or blank into hollow thick-walled tube; ② in the extension machine will be thin rolling, extending into the wall thickness of the finished product; ③ in the finishing mill rolling The required finished tube. The rolling mill unit is represented by the maximum outside diameter of the production pipe.