Seamless steel pipe application and production process knowledge

Application and classification of seamless steel pipe

Purpose:

Seamless steel pipe is a kind of economic section steel, which plays an important role in the national economy and is widely used in petroleum and chemical industries

Engineering, boiler, power station, ship, machinery manufacturing, automobile, aviation, aerospace, energy, geology, architecture, military and other departments

Door.

Classification:

① Divided into round section pipe and special-shaped section pipe according to section shape

② By material: carbon steel pipe, alloy steel pipe, stainless steel pipe, composite pipe

③ By connection mode: threaded connection pipe, welded pipe

④ According to the production mode: hot rolled (extruded, jacked, expanded) pipe, cold rolled (drawn) pipe

⑤ By use: boiler pipe, oil well pipe, pipeline pipe, structural pipe, fertilizer pipe

Seamless steel pipe production process

① Main production processes (main inspection processes) of hot rolled seamless steel pipes:

Preparation and inspection of tube blank -+heating of tube blank -+piercing → reheating of rolled tube blank -+sizing (reducing) - heat treatment -+straightening of finished tube

Straight → finishing+inspection (non-destructive, physical and chemical, bench inspection) → warehousing

② Main production processes of cold rolled (drawn) seamless steel tubes

Blank preparation -+pickling lubrication -+cold rolling (drawing)+heat treatment I+straightening -+finishing+inspection