What is Seamless Steel Pipe?
Date:2022-06-06
Views:371
The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. The seamless steel pipe has a hollow section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials.
Classification of seamless pipes:
1. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking.
2. According to the cross-sectional shape, the seamless steel pipe is divided into two types: circular and special-shaped. The maximum diameter is 900mm and the minimum diameter is 4mm.
3. According to the different wall thickness, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes.
4. According to the material, there are ordinary and high-quality carbon structural steel, low-alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.
5. According to the use, it is divided into two categories: general use (for water, gas pipelines and structural parts, mechanical parts) and special (for boilers, geological exploration, bearings, acid resistance, etc.).
Application of seamless pipe:
Seamless steel pipes are widely used.
1. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.
2. According to different uses, there are three types of supply:
a. Supply according to chemical composition and mechanical properties;
b. Supply according to mechanical properties;
c, according to the hydraulic test supply. Steel pipes supplied according to categories a and b, if they are used to withstand liquid pressure, shall also undergo a hydrostatic test.
3. There are many kinds of seamless pipes for special purposes, such as seamless pipes for boilers, seamless pipes for chemical power, seamless pipes for geological use and seamless pipes for petroleum.
Compared with solid steel such as round steel, the 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, bicycle frames and steel scaffolding used in construction. The use of steel pipes to make ring parts can improve material utilization, simplify manufacturing processes, save materials and processing Man-hours have been widely used to manufacture seamless steel pipes.
