Seamless square steel pipe is a long strip of steel with a hollow section and no joints around it. It is made of strip steel that has been processed and rolled. Seamless steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials.
Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when the bending and torsional strength is the same, and is an economical section steel. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts The seamless pipes made of high-quality carbon structural steel plates or low-alloy structural steel plates such as bicycle frames and steel scaffolding used in construction are much better than ordinary welded pipes; the thicker the wall thickness of the seamless rectangular pipe, the better the pressure-bearing capacity. High specific application reference:
1. Spiral seam submerged arc welded steel pipe (gb/t3092-93) for general low-pressure fluid transportation, which is made by double-sided automatic submerged arc welding or single-sided welding for general low-pressure fluid transportation such as water, gas, air and steam. Submerged arc welded steel pipe.
2. Spiral welded steel pipes for pressure equipment (gb/t9711.1-1997) are mainly used for the design and manufacture of industrial boiler pressure vessels and their supporting pipelines.
3. Straight seam electric welded steel pipe:
It is used as a protective tube when the transmission line cable conduit in the AC 50hz and 60hz overhead transmission lines is used as an insulating layer and passes through an oil-immersed power transformer.
4. High pressure boiler tube (20g):
It is mainly used to manufacture high-quality carbon structural steel hot-rolled and cold-drawn (rolled) stainless steel for steam boiler pipes with high pressure and above. It is widely used in nuclear power generation. Factory – atomic reactor – petrochemical – chemical industry – machinery manufacturing – shipbuilding and other fields.
5. Special pipe for chemical fertilizer:
(gb6479-2000) is suitable for thermal insulation engineering of chemical equipment and pipelines with working temperature of -40~400°C and working pressure of 10~30ma.
Post time: Jun-23-2022