Alloy Steel Spiral Pipe

Alloy steel spiral pipe,also known as alloy steel SSAW submerged arc welded spiral pipe,is a high-performance helical welded steel pipe manufactured from various alloy steel coils.By adding alloying elements such as chromium,molybdenum,manganese,nickel and vanadium into base carbon steel,the material obtains greatly improved mechanical properties,high temperature resistance,pressure resistance,corrosion resistance and structural strength compared with ordinary carbon steel spiral pipes.

The production process adopts continuous spiral forming and double-sided submerged arc welding technology.The steel strip is spirally rolled into cylindrical pipe blank,with internal and external welds completed under molten flux protection.After forming,the pipe undergoes strict non-destructive testing,hydrostatic pressure test,dimensional calibration,end beveling and surface treatment.

Benefiting from excellent alloy material properties,this type of pipe features outstanding high temperature endurance,high pressure bearing capacity,oxidation resistance,creep resistance and good toughness under harsh working conditions.It maintains stable structural performance even in extreme environments including high temperature,high pressure,corrosive medium and long-term heavy load operation.

Main Specifications

Outer Diameter:219mm–3620mm

Wall Thickness:6mm–50mm

Standard Length:6m,12m,18m customizable

Common Alloy Steel Grades:15CrMo,12Cr1MoV,A335 P11,P22,P91,42CrMo,16Mn alloy steel

Executive Standards:API 5L,GB/T 9711,ASTM A387,EN 10216

Key Advantages

Superior high temperature and high pressure resistance,suitable for extreme industrial working conditions.

Excellent corrosion resistance,oxidation resistance and creep resistance at elevated temperatures.

High structural strength,good impact toughness and anti-fatigue performance.

Spiral weld structure ensures uniform stress distribution and strong seismic resistance.

Large diameter production availability and strong specification flexibility.

Applications

Alloy steel spiral pipes are widely applied in thermal power plants,petrochemical engineering,boiler pipelines,high-temperature steam transmission,oil refining equipment,high-pressure fluid transportation,metallurgical industry pipelines and other heavy industrial fields that require high temperature and high pressure resistance.