What is the material of seamless steel pipe?
The materials of seamless steel pipes include: ordinary and high-quality carbon structural steel (Q215-A ~ Q275-A and 10 ~ 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.
Seamless steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, coal gas, water and certain solid materials. Compared with solid steel materials such as round steel, steel pipes are lighter in weight when the bending and torsional strength is the same, and they are an economical cross-section steel material. Different materials of seamless steel pipes have different uses.
What is a seamless steel pipe, what is a welded pipe, and what is the difference?
Difference 1. Different raw materials
Seamless steel pipe materials include ordinary and high-quality carbon structural steel (Q215-A ~ Q275-A and 10 ~ 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.;
Welded pipes are made of steel plates or strips that are crimped and then welded.
Difference 2. Different uses
Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation;
Welded pipes are widely used in water supply projects, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction.
Welded pipes are used for liquid transportation: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas; for structural use: piling pipes, bridges; pipes for docks, roads, building structures, etc.
What is the formula for calculating the weight of seamless steel pipes?
Weight per meter of seamless steel pipe W = 0.02466S (D-S) Symbol meaning: D = outer diameter S = wall thickness Calculation example: For a seamless steel pipe with an outer diameter of 60mm and a wall thickness of 4mm, find the weight per m. Weight per m = 0.024664 ( 60-4)=5.52Kg The theoretical weight calculation formula of seamless steel pipe W=0.0246615(D-S)S
W: Theoretical weight of steel pipe kg/m D: Nominal outer diameter of steel pipe mm S: Nominal wall thickness of steel pipe mm
Galvanized steel
W=C[0.02466(D-S)S] W - Theoretical weight of steel pipe kg/m C - Weight coefficient of galvanized steel pipe compared with black pipe D - Outer diameter of black pipe mm S - Wall thickness of black pipe mm Example: DN219 seamless Steel pipe, wall thickness=6mm W=(219-6)6*0.02466=31.51548KG/M
