Uses of seamless pipe
Seamless steel pipe is made of perforated whole round steel, and the steel pipe without seamless on the surface is called pipe
seamless steel. 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, seamless steel pipes. extruded and lifting pipes. According to the shape of the cross section, seamless steel pipe is divided into two types: round and special shape. The maximum diameter is 900 mm and the minimum diameter is 4 mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.
Classification
Seamless steel pipe along the perimeter of its cross section. According to different production methods, it is divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe lifting, etc., all of which have their own process regulations.
Materials are ordinary and high-quality carbon structural steel (Q215-A ~ Q275-A and 10 ~ 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel , acid resistant stainless steel, etc.
According to the use, it is divided into two categories: general use (for water, gas pipelines and structural parts, mechanical parts) and special use (for boilers, geological exploration, bearings, acid resistance, etc.).
Uses of seamless steel pipes
1. General-purpose seamless carbon steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest production, and are mainly used as pipes or structural parts to transport fluids .
2. According to different uses, there are three types of supply:
to. Supply according to chemical composition and mechanical properties;
b. Supply according to mechanical properties;
c, according to the hydraulic test supply. Steel pipes supplied under categories a and b, if used to support liquid pressure, shall also be subjected to a hydrostatic test.
3. There are many types of seamless pipes for special purposes, such as seamless pipes for boiler, seamless pipes for chemical energy, seamless pipes for geological use and seamless pipes for petroleum. Seamless steel pipes have hollow sections and are widely used as pipes to transport fluids, such as pipes to transport oil, natural gas, gas, water and certain solid materials. Compared with solid steel, such as round steel, steel pipe is lighter when the bending and torsional strength is the same, and it is an economical section steel. It is widely used in the manufacturing of structural parts and mechanical parts, such as oil drilling pipes, automobile drive shafts, bicycle frames and steel scaffolding used in construction. Using steel tubes to manufacture ring parts can improve the material utilization rate, simplify the manufacturing process, and save materials and processing. Man-hours have been widely used to manufacture steel pipes.
