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. Construction categories are: under the pipeline transport up to more, cover the floor when the extraction of groundwater, boiler hot water transport and so on.
2. Machining, bearing sets, processing machinery parts and so on.
3. Electric class: gas transmission, water generation fluid pipeline.
4. Wind power plant anti-static 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.