ASTM A335 Seamless Pipe

ASTM A335 Seamless Pipe

ASTM A335 seamless pipe manufacturer & supplier providing premium alloy seamless pipe for high temperature and high pressure service. Reliable creep performance, anti-oxidation and long service life. Custom sizes, fast lead time and full EN 10204 3.1 MTC available. Size Range: Ø 10–720 mm Wall Thickness: 2.0–80 mm Length: 6 m / 12 m standard; custom cut-to-length on request Forms: Round seamless pipe / Hollow alloy tube Standard: ASTM A335 / ASME SA335 Grades Available: P5, P9, P11, P22, P91, P92 Condition: Hot Finished / Cold Drawn / Normalized & Tempered Surface Finish: Black Varnished, Pickled, Shot Blasted Key Material Feature: High temperature strength • Pressure resistance • Oxidation & corrosion resistant Service Temperature: Up to ~650°C for long-term working Certification: EN 10204 3.1 MTC • PMI Tested • SGS/BV/TÜV inspection optional
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Description
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Description 

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Engineered for extreme high-temperature and high-pressure environments, ASTM A335 seamless pipe stands as a top-tier ferritic alloy steel piping solution ASTM International. Crafted via seamless technology, it delivers exceptional creep resistance, oxidation resistance, and structural stability under prolonged harsh conditions. Available in grades like P11, P22, P5, P9, and P91, this pipe meets strict ASTM A335/A335M standards, ensuring reliability for critical industrial systems.

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ASTM A335 Seamless Pipe

ASTM A335 seamless pipe is a hot-finished ferritic alloy steel seamless tube engineered for high-temperature, high-pressure service in power plants, refineries, and process industries. Its typical grade features are:

  • Chromium (Cr 1–9%) – for oxidation resistance and elevated-temperature strength
  • Molybdenum (Mo 0.3–1.0%) – for creep strength and pressure containment at extreme temperatures
  • Carbon (C ≤0.15%) – for controlled hardenability and weldability
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About Jiangsu Cunrui Metal Products Co., Ltd.

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We're Jiangsu Cunrui Metal Products Co., Ltd., a professional metal materials manufacturer and supplier based in Wuxi, Jiangsu, with nearly 20 years of hands-on industry experience.Since our founding in 2006, we've grown into a modern factory with a total investment of RMB 180 million and annual sales exceeding RMB 2 billion. We've built long-term, stable partnerships with top-tier steel mills including Baosteel, TISCO, and POSCO-giving us a steady, reliable source of high-quality materials you can count on.

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Key Applications 

This alloy seamless pipe fits various heavy industrial applications. In power generation, it is used for boiler tubes, steam pipelines, superheaters and reheaters in thermal power plants, tolerating temperatures up to 650°C. It works well in petrochemical and refinery facilities, resisting sulfidation and hydrogen embrittlement during high-temperature fluid transportation. Additionally, it is suitable for high-pressure oil & gas drilling and transmission projects. It is also commonly applied to industrial boilers, heat exchangers and pressure vessels requiring stable thermal performance.
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Choose Us!

 

We offer genuine factory direct pricing with no middle agents or hidden extra costs. As we independently manage the whole production process in our own factory, we can deliver genuinely competitive rates directly to every customer.


We stick to strict quality standards all the way through production. Every batch of ASTM A335 seamless pipe is fully inspected with 100% hydrostatic pressure testing and complete ultrasonic examination before delivery, making sure every piece meets qualified quality requirements.


We have rich experience in global export shipping, covering more than 50 countries worldwide. With mature international logistics arrangements, we can guarantee safe packaging, smooth customs clearance and punctual delivery for every overseas order.


Our professional technical team provides all-day round-the-clock service. We offer one-stop support including product model selection, professional application suggestions and timely after-sales follow-up, solving all your purchasing and technical doubts efficiently.

 

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FAQs

 

Q1: What grades of ASTM A335 seamless pipe do you offer?
A1: We provide P1, P5, P9, P11 and P92 grades, with customized chemical compositions and mechanical properties available.


Q2: What is the standard length and size range?
A2: Outer diameter: 16mm–610mm; Wall thickness: 2mm–50mm; Standard lengths: 6m or 12m. Custom lengths are acceptable.


Q3: Do you provide quality certificates?
A3: Yes. Each batch comes with ISO 9001, PED, and material test certificates (MTC), including hydrostatic test and non-destructive examination reports.


Q4: What are your payment and delivery terms?
A4: Payment: T/T (30% deposit, 70% before shipment) or L/C. Delivery: 15–30 days after deposit, with FOB/CIF/CFR terms available.


Q5: Can you supply samples for testing?
A5: Absolutely. Free small samples are available; clients only need to cover the courier fee.

 

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