What is a335 p12 pipe specification
Jan 07, 2026
P12 is an alloy steel material conforming to the American standard ASTM SA335/SA335M. Its popularity in numerous industrial sectors stems from its outstanding properties of high temperature resistance, high pressure resistance, and corrosion resistance. In industries such as petroleum, chemical, power, and shipbuilding, operating conditions are often extremely complex, demanding stringent material performance. P12 alloy steel, with its inherent advantages, can operate stably under harsh high-temperature and high-pressure environments, effectively resisting the erosion of various corrosive media and ensuring the safe and stable operation of related equipment. Therefore, it has become a crucial material choice in these industries.
A335 P12 Alloy steel pipe specification
Nominal Dia: 1/2 "to 22" NB for seamless pipe
Schedules: 5S, 10S, 40S, 80S, 10, 20, 30...120, 140, 160, XXS
All dimensions are in accordance with ANSI B36.19 and ANSI B36.10
Size Range for tubing: OD:1/4" (6.25mm) to 8" (203mm), WT 0.02" (0.5mm) to 0.5"(12mm)
Length: 12 m(Max) or as your requirement
Process: Hot Rolled
Finish: black paiting/varnish/anti-rust oil coating or as requested
Ends: Beveled or plain end, square cut, burr free ,Plastic Cap at Both end
Applications:
1. Power Industry
Power Plant Boiler Systems: High-temperature steam pipelines, superheaters, reheaters, and headers.
Heat Pipelines: Transporting high-temperature, high-pressure steam (typically ≤ 565°C).
Steam Turbine Connection Pipelines: Creep resistance suitable for long-term high-temperature operation.
2. Petrochemical Industry
High-Temperature Pipelines in Oil Refineries: Material pipelines for catalytic cracking units and hydrotreating units.
Reactor Pipelines in Chemical Plants: Resistant to hydrogen sulfide corrosion and high-temperature, high-pressure environments.
Heat Exchangers and Furnaces: Transfer of high-temperature heat media.
3. Oil and Gas Transportation
High-Temperature Oil and Gas Pipelines: Such as steam injection pipelines in heavy oil thermal recovery.
Corrosion Resistance Scenarios: Resistance to sulfide stress corrosion cracking in sulfur-containing oil and gas environments (requires heat treatment processes).
4. Manufacturing and Industrial Equipment
High Pressure Vessel Fittings: Process piping systems conforming to ASME B31.3.
A335 P12 Heat Exchanger Tube Factory
