A335 P1 P2 P5 P9 P11 P22 P91 P92 Steel Pipe
A335 P1 through P92 steel pipe is designed for high-temperature and high-pressure service, where creep resistance and thermal stability are critical. Jialu Metal supplies both seamless and welded versions in round, square and rectangle shapes, so projects requiring P11 superheater tubes, P22 headers or P91 boiler drums do not need to be split across multiple mills. One order covers the grade, shape and standard, with
- Creep-resistant grades from P1 to P92 available for elevated-temperature applications
- Seamless and welded types supplied in round, square and rectangle sections to match design requirements
- One contract covers mixed-grade and mixed-shape scope, avoiding split sourcing across mills
- In-house CNAS-certified lab and third-party inspection available to meet code compliance
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
A335 P1 through P92 steel pipe is designed for high-temperature and high-pressure service, where creep resistance and thermal stability are critical. Jialu Metal supplies both seamless and welded versions in round, square and rectangle shapes, so projects requiring P11 superheater tubes, P22 headers or P91 boiler drums do not need to be split across multiple mills. One order covers the grade, shape and standard, with inspection and shipment managed as a single flow.
Why Buyers Choose It
- Creep-resistant grades from P1 to P92 available for elevated-temperature applications
- Seamless and welded types supplied in round, square and rectangle sections to match design requirements
- One contract covers mixed-grade and mixed-shape scope, avoiding split sourcing across mills
- In-house CNAS-certified lab and third-party inspection available to meet code compliance
- Export-ready packaging and logistics support for delivery to over 80 countries
Where It Is Used
- Boiler superheater and reheater circuits using A335 P11, P22 and P91 tubes
- High-temperature process piping in refineries and petrochemical plants with P9 and P91 service
- Power plant steam headers and piping systems requiring P22 and P91 creep strength
- Cryogenic and low-temperature service where P1 and P2 are used in specific applications
- Structural and support frames in high-temperature environments using P11 and P22 square and rectangular sections
- Replacement piping in aging power or industrial plants where P91 or P92 is specified for life extension
Who It Is For
- Power plant engineers sourcing P91 and P92 tubes for boiler upgrades
- Refinery and chemical plant fabricators needing P11 and P22 tubes for high-temperature service
- EPC contractors managing mixed-grade piping scopes in thermal power or industrial projects
- Maintenance teams replacing high-temperature piping with code-compliant A335 grades
- Fabricators who need square and rectangular sections for structural components in high-heat environments
Problems It Solves
- Splitting high-temperature pipe sourcing across multiple mills due to grade and shape limitations
- Delays caused by waiting for different mills to produce P11, P22, P91 or P92 in specific shapes
- Mismatched inspection schedules when one mill delivers seamless and another delivers welded pipe
- Inconsistent material certification when grades are sourced from different suppliers
- Difficulty in meeting code requirements for creep strength and thermal stability in one order
Technical Features
- Chromium-molybdenum alloy steel grades A335 P1, P2, P5, P9, P11, P22, P91 and P92 for high-temperature service
- Seamless and welded pipe types available, with wall thickness and diameter tailored to application
- Round, square and rectangle sections supplied to match structural and process design needs
- Creep strength and thermal stability verified through material specification and testing
- Heat treatment applied per grade, including normalising, quenching and tempering for P91 and P92
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| Grade | A335 P1, P2, P5, P9, P11, P22, P91, P92 |
|---|---|
| Type | Seamless, Welded |
| Shape | Round, Square, Rectangle |
| Applications | Boiler tubes, superheater, reheater, headers, high-temperature piping |
| Wall Thickness Range | TBC |
| Outside Diameter Range | TBC |
| End Preparation | Plain end, bevelled end, threaded, or custom |
Materials
- Chromium-molybdenum alloy steel for creep resistance in elevated-temperature service
- P1 and P2 for low-temperature and general high-temperature use
- P5 and P9 for intermediate-temperature applications with improved stability
- P11 and P22 for superheater and header service in power plants
- P91 and P92 for high-creep-strength applications in modern power generation
Manufacturing Route
Quality Control
- Chemical composition and mechanical properties tested against A335 specification
- In-house CNAS-certified laboratory performs routine testing and verification
- Third-party inspection available on request, bookable at order stage
- Mill certificates issued per purchase order, covering grade, standard and heat number
- Non-destructive testing (NDT) available upon request for high-risk applications
Customisation Options
- Grade and shape selected per line item, so one order can mix P11, P22, P91 and P92 in round and square
- Cut lengths and end preparation specified at order stage
- OEM service accepted for branded or custom marking
- Packing and labeling arranged to meet destination port and inspection requirements
How It Compares With The Alternatives
| Carbon steel pipe | A335 grades offer superior creep strength and thermal stability; carbon steel fails at sustained high temperatures |
|---|---|
| Stainless steel pipe | A335 P91/P92 has higher creep strength than austenitic stainless; stainless is better for corrosion but not for high-temperature strength |
| Welded pipe | Seamless pipe has no weld line, which is critical in high-pressure and high-temperature service; welded is acceptable for lower-stress applications |
Buying Guide
- Start with the project’s temperature and pressure requirements to select the correct A335 grade
- For P91 and P92, confirm that heat treatment and post-weld heat treatment (PWHT) are included in the scope
- Specify shape (round, square, rectangle) and end preparation early to avoid delays
- Send the size table with the enquiry, as availability varies by diameter and wall thickness
- Book third-party inspection at order stage to align production and shipment schedules
Questions About A335 P1 P2 P5 P9 P11 P22 P91 P92 Steel Pipe
Which A335 grades do you supply?
We supply A335 P1, P2, P5, P9, P11, P22, P91 and P92 in seamless and welded types.
Can you supply square and rectangular sections?
Yes. Round, square and rectangle sections are available for all A335 grades.
Do you offer seamless and welded pipe?
Yes. Both seamless and welded pipe types are available for A335 P1 through P92.
What certifications do you hold?
We hold ISO 9001, API Q1, PED, CE, API 5L, API 5CT, API 5DP, and an in-house CNAS-certified laboratory.
Can we book third-party inspection?
Yes. Third-party inspection is available on request and is best arranged at the order stage.
What payment terms and currencies do you accept?
We accept L/C, T/T, PayPal and credit card, in USD, CAD, AUD, SGD, EUR or RMB.
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Get A335 P1 P2 P5 P9 P11 P22 P91 P92 Steel Pipe Quoted
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