Name: ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater
Brand: YUHONG HOLDING GROUP CO., LTD
SKU: ASTM A335 P91 P92
Availability: InStock

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ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater

ASME SA335 P91 alloy boiler tube

high temperature pressure boiler tube

seamless steel superheater tube

Place of Origin:

China

Brand Name:

YUHONG

Certification:

ISO 9001/TUV/PED

Model Number:

ASTM A335 P91 P92

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Product Details

Standard:

ASTM A335

Material Grade:

P91 P92

Form:

Seamless Pipe

Diameter:

3.18-152.4mm

Wall Thickness:

0.41mm - 25.4mm

Applications:

Boilers, Heat Exchangers, Superheaters, HRSG

Highlight:

ASME SA335 P91 alloy boiler tube

high temperature pressure boiler tube

seamless steel superheater tube

Payment & Shipping Terms

Minimum Order Quantity

500 KGS

Price

Negotiable

Packaging Details

Steel frame wooden case with plastic cap

Delivery Time

Depends on order quantity

Payment Terms

T/T, L/C at sight

Supply Ability

1000 TONS / month

ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater

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+8613625745622

nirit@steelseamlesspipe.com

0086-574-88013900

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Product Description

ASME SA335 P91 and P92 both belong to the ASME SA-335/SA-335M standard for high-temperature seamless ferritic alloy steel pipes, and are specialized pipe materials for high-temperature pressure equipment such as thermal power plants.

P91: High-temperature superheaters, reheaters, and main steam pipelines of subcritical/supercritical boilers, and high-temperature pyrolysis units in petrochemical plants.

P92: Main steam, high-temperature reheat steam pipelines, and high-pressure bypass systems of ultra-supercritical boilers.

Core Advantages: P92 vs P91 The development of P92 aims to surpass the performance ceiling of P91, with advantages including:

Stronger high-temperature creep strength: This is P92's most significant advantage. This means that under the same temperature and pressure, thinner wall thicknesses can be designed using P92.

Higher service temperature: P92's long-term safe service temperature can reach 625℃, while P91 is generally around 585℃.

Better resistance to thermal fatigue: P92's coefficient of linear expansion is similar to P91, both superior to austenitic stainless steel.

More weldable: Due to optimized alloy design, P92 is significantly less sensitive to preheating cracks, requiring a zero-crack preheating temperature of approximately 100°C, lower than P91's approximately 180°C. Core Advantages: P92 vs P91

P92 was developed to surpass the performance ceiling of P91, with advantages including:

Stronger high-temperature creep strength: This is P92's most significant advantage. This means that under the same temperature and pressure, P92 can be used to design thinner walls (approximately 30%-40% thinner).

Higher service temperature: P92's long-term safe service temperature can reach 625°C, while P91 is generally around 585°C.

Better resistance to thermal fatigue: P92's coefficient of linear expansion is similar to P91, both superior to austenitic stainless steels.

Chemical Composition
Element	P91	P92
Carbon (C)	0.08 - 0.12	0.07 - 0.13
Manganese (Mn)	0.30 - 0.60	0.30 - 0.60
Phosphorus (P)	≤ 0.020	≤ 0.020
Sulfur (S)	≤ 0.010	≤ 0.010
Silicon (Si)	0.20 - 0.50	≤ 0.50
Chromium (Cr)	8.00 - 9.50	8.50 - 9.50
Molybdenum (Mo)	0.85 - 1.05	0.30 - 0.60
Nickel (Ni)	≤ 0.40	≤ 0.40
Vanadium (V)	0.18 - 0.25	0.15 - 0.25
Niobium (Nb)	0.06 - 0.10	0.04 - 0.09
Nitrogen (N)	0.03 - 0.07	0.03 - 0.07
Tungsten (W)	—	1.50 - 2.00
Boron (B)	—	0.001 - 0.006
Aluminum (Al)	≤ 0.02	≤ 0.04

Mechanical Properties (Room Temperature)
Property	P91	P92
Tensile Strength (min.)	≥ 585 MPa	≥ 620 MPa
Yield Strength 0.2% offset (min.)	≥ 415 MPa	≥ 440 MPa
Elongation (min.)	≥ 20%	≥ 20%
Hardness (HBW)	170 - 248	170 - 248

Application:

Nuclear Power Plants: Used in the main steam system piping of some conventional islands, and high-temperature components such as steam generators.
Chemical/Fertilizer Industry: Used in high-temperature and high-pressure reactors, heat exchangers, and process piping.
Solar Thermal Power Generation: Used in molten salt or steam heat transfer piping systems for concentrated solar thermal power generation, meeting high-temperature durability requirements.
Industrial High-Pressure Boilers: Water-cooled walls and superheater tubes.

ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater 0

Ratings& Review

Overall Rating

4.3

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

33%

4 stars

67%

3 stars

2 stars

1 stars

All Reviews

Bruce Henderson

Australia Jan 8.2026

Helpful (3)

Using this reactor for our green hydrogen ammonia pilot project. The 200,000L capacity gives us good scale-up data for commercial facilities. Australian Standards AS1210 compliance was verified by local inspection body—no issues. The vendor's familiarity with high-purity hydrogen service (99.999%) was evident in the material selection and cleaning procedures. Delivery to Port of Newcastle was well-coordinated. Responsive team, professional documentation.

Robert Miller

United States Jan 7.2026

Helpful (2)

Fully meets the rigorous requirements of TEMA R standards. We used these SA266 Grade 2N flanges for a refinery project in Texas. The machining precision is impressive, and the sealing face finish is absolutely perfect.

T*i

South Africa Sep 30.2025

Helpful (3)

Robust construction suitable for our tough operating environment. The vessel handles our coal-to-liquid hydrogenation process with Fischer-Tropsch syncrude—highly corrosive service. The internal cladding overlay (E309L/E347) has shown zero defects after 18 months operation. We appreciate the comprehensive spare parts list and recommended maintenance schedule. The manufacturer even provided on-site supervision during our first catalyst loading. Good value for African market conditions.

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ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater

ASME SA335 P91 alloy boiler tube

high temperature pressure boiler tube

seamless steel superheater tube

ASME SA335 P91 alloy boiler tube

high temperature pressure boiler tube

seamless steel superheater tube

ASME SA335 P91 P92 Seamless Alloy Steel Boiler Tube，High Temp Pressure for Power Plant Boiler, Superheater

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