Alloy Steel Pipe
Alloy steel pipe refers to a steel pipe with iron and carbon as the main components, and by adding specific alloying elements (such as chromium, molybdenum, nickel, vanadium, titanium, etc.) to improve its mechanical properties, corrosion resistance, high temperature resistance or low temperature toughness. Its total alloying element content is usually ≥1% (some high-performance alloy steels can reach 5%~20%), making it significantly superior to ordinary carbon steel pipes in strength, durability or special environmental adaptability.
Size Range
Outer diameter
Seamless alloy steel pipe:
Small diameter: 6mm ~ 168mm (precision cold-drawn pipe, used for instrumentation and hydraulic systems).
Medium and large diameter: 168mm ~ 660mm (hot-rolled pipe, used for petroleum and chemical pipelines).
Extra-large diameter: up to 1200mm (need to be customized, usually using extrusion process).
Welded alloy steel pipe:
Conventional diameter: 10mm ~ 2500mm (spiral welding or straight seam welding, used for structure and transmission pipelines).
Extra-large diameter: above 2500mm (such as wind power towers, large storage tanks).
Wall thickness
Thin-walled pipe: 0.5mm ~ 5mm (such as automobile exhaust pipes, heat exchanger pipes).
Conventional wall thickness: 5mm ~ 50mm (pressure pipes, mechanical structure pipes).
Thick wall/extra-thick wall: 50mm ~ 150mm (such as nuclear power main pipelines, high-pressure boiler pipes).
Length
Fixed length: usually 6m, 12m (standard transport length).
Random length: 4m ~ 14m (adjusted according to production equipment capacity).
Extra long pipe: up to 18m or more (such as submarine pipelines, special processes are required).
Standard & Grade
Seamless ferritic alloy steel pipes for high temperature use ASTM A335 P5, P9, P11, P22, P91, P92
Seamless alloy steel pipes for boilers and heat exchangers ASTM A213 T5, T9, T11, T22, T91
Application
Energy industry: supercritical power station boiler tubes (such as T91/P92), nuclear power main pipelines.
Petrochemical: acid-resistant cracking furnace tubes (such as 316L), high-pressure hydrogenation reactors.
Machinery manufacturing: high-strength transmission shafts (such as 42CrMo), hydraulic cylinders.
Aerospace: engine high-temperature fuel pipes (such as Inconel 718).
简体中文版
WhatsApp
WeChat