Product Overview

Manufactured following ASTM A335 industrial standard, thisP91 pipe belongs to ferritic martensitic alloy steel tubing. It is purposely engineered for harsh high-temperature and high-pressure working environments. Unlike ordinary carbon steel tubes, this alloy pipe maintains stable physical structure under extreme conditions, making it a practical and cost-effective option for heavy-duty engineering projects.

ASTM A335 p91 pipe

Advantages

Superior Thermal Stability: The steel material retains a stable internal structure and will not deform even under continuous ultra-high temperature working conditions, adapting to long-term high-temperature service environments.

Excellent Creep Resistance: It effectively resists metal fatigue caused by long-term high pressure. This characteristic greatly extends the overall service life of the pipeline and reduces replacement frequency.

High Temperature Corrosion Resistance: Featuring outstanding oxidation resistance, the pipe stays stable when exposed to high-temperature steam and weak corrosive media, avoiding surface oxidation damage.

Good Processing Performance: It has reliable weldability and cutting compatibility. Workers can easily finish on-site cutting, welding and installation without complicated processing procedures.

Chemical Composition

Element	Content Standard	Function
Cr (Chromium)	8.00%-9.50%	Improve oxidation and corrosion resistance
Mo (Molybdenum)	0.85%-1.05%	Enhance high-temperature creep resistance
V (Vanadium)	0.18%-0.25%	Optimize internal grain structure
Nb (Niobium)	0.06%-0.10%	Improve overall structural toughness

Mechanical Properties

Property	Testing Data	Remark
Tensile Strength	≥ 585 MPa	Room temperature test
Yield Strength	≥ 415 MPa	Stable pressure bearing capacity
Elongation	≥ 20%	Good ductility for deep processing
Hardness	≤ 250 HB	Balanced hardness & toughness

Application Range

With reliable high-temperature tolerance, the P91 pipe serves maturely in multiple heavy industrial sectors:

Thermal Power Industry: Superheater, reheater and main steam delivery pipelines in power stations.

Petrochemical Industry: High-temperature cracking furnace tubes and corrosive medium transmission pipes.

Energy & Nuclear Field: Heat exchange equipment and auxiliary circulating piping systems.

Metallurgical Industry: High-pressure boiler tubes and high-temperature flue gas conveying pipelines.

Why Choose Our Company

Direct Manufacturer Advantage: We are genuine physical factory instead of trading company. All goods are produced and inspected by ourselves, effectively controlling product quality and production cost to offer competitive ex-factory price.

Strict Quality Control: From raw material selection to finished product packaging, every process undergoes standardized inspection. Third-party testing is acceptable to meet international industrial standards.

Rich Export Experience: With years of overseas trading experience, we are familiar with international customs clearance documents, packaging standards and shipping procedures, ensuring smooth delivery for every order.

Customization Flexibility: Apart from standard specifications, we provide personalized processing services including cutting, polishing and marking to meet diverse engineering requirements.

Reliable After-sales Service: Our professional technical team offers long-term after-sales support. Any product usage questions will be replied within 24 hours to eliminate customers' worries.