Seamless pipe is a long steel strip with a hollow cross-section and no seams around it.
Features of seamless pipe:
First, the thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost;
Second, the process of the product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of fixed length, and pitting and black spots on the inner and outer surfaces are not easy to remove;
Third, its detection and shaping must be processed offline. Therefore, it has demonstrated its superiority in high pressure, high strength, and mechanical structural materials.
Classification of seamless pipes:
According to the different metallographic structures of stainless steel, it is divided into semi-ferrite and semi-martensitic stainless steel pipes, martensitic stainless steel pipes, austenitic stainless steel pipes, austenitic-ferritic stainless steel pipes, etc.
Application of seamless pipes:
Fluid conveying pipes, boiler plants, engineering, and mechanical processing plants.
Process flow of seamless pipe:
Tube blank – inspection – peeling – inspection – heating – perforation – pickling – grinding – lubrication and air drying – welding head – cold drawing – solution treatment – pickling – pickling passivation – inspection – cold rolling – degreasing – cutting – air drying – internal polishing – external polishing – inspection – marking – finished product packaging
Uses of seamless pipe:
- Oil and gas extraction field: seamless pipes are used for drilling and production of oil wells and natural gas wells, as well as oil and gas pipelines.
- Chemical industry: seamless pipes are used for pipelines and equipment in industrial fields such as oil refining, chemical industry, and fertilizer.
- Electric power, aerospace and automobile fields: the high strength and corrosion resistance of seamless pipes make them widely used in power station boilers, aircraft engines, automobile emission systems and other fields.
- Shipbuilding field: seamless pipes are used for hull structures and piping systems in the shipbuilding industry.
- Construction field: seamless pipes are used for water supply, gas supply, heating and drainage systems of buildings.
- Mechanical Engineering: Seamless pipes are used in high-pressure vessels, pressure pipes, mechanical processing equipment, etc. in mechanical engineering.
Summary of seamless pipes:
As an important pipe material, seamless pipes may have various defects during production and use, such as pores, cracks, inclusions, etc. In order to avoid these problems, it is necessary to select high-quality materials, improve monitoring equipment, and ensure transportation safety. Only in this way can high-quality seamless pipes be produced to meet the needs of different industries.