Alloy Steel Seamless Pipes

1. Raw Material Preparation: 

Selection of high-quality alloy steel billets (enhanced with Cr, Mo, Ni, V) to meet industrial seamless pipe standards.

2. Piercing: 

Hot piercing of billets to form hollow shells, the foundation of the seamless structure.

3. Hot Rolling/Cold Drawing: 

Precision hot rolling for large diameters or cold drawing for tight tolerances, achieving target OD and wall thickness.

4. Sizing & Straightening: 

Calibration to strict dimensional tolerances for roundness, straightness, and surface smoothness.

5. Heat Treatment: 

Normalizing, quenching, and tempering to enhance high-temperature strength, toughness, and corrosion resistance.

6. Surface Treatment: 

Descaling, polishing, and optional anti-corrosion coatings to resist oxidation and regional environmental stress.

7. Testing & Inspection: 

Hydrostatic pressure testing, ultrasonic testing (UT), radiographic testing (RT), chemical composition analysis, and mechanical property verification.

8. Finishing: 

Cutting to standard or custom lengths, with plastic caps on ends to protect against contamination.

Superior High-Temperature Resistance: 

Withstands up to 600°C+ heat, ideal for power plant boilers and high-temperature industrial processes.

Exceptional Strength: 

Higher tensile and yield strength than carbon steel, supporting high-pressure applications (oil & gas pipelines, chemical processing).

Corrosion & Oxidation Resistance: 

Alloy elements and precision treatment resist acids, saline air, high-pressure steam, and desert erosion.

Seamless Reliability: 

No welded weak points, ensuring consistent pressure resistance and structural integrity in critical operations.

Climate Adaptability: 

Performs reliably in extreme temperatures (-10°C to 600°C+) and harsh industrial environments across target regions.

Precision & Versatility: 

Consistent dimensions and smooth surfaces enable easy integration into diverse industrial systems.

Our Alloy Steel Seamless Pipes comply with global and regional industrial standards:

• International Standards: ASTM A335/ASME SA335, ASTM A213/ASME SA213, DIN 17175, EN 10216
• Quality & Safety Certifications: ISO 9001, API, PED Certified
• Regional Compliance: SASO (Middle East), SONCAP (Africa), SNI (Indonesia), TIS (Thailand), ISIRI (West Asia)
• All orders include material test certificates (MTC) and compliance reports for project approval and customs clearance.

Packaging

• Pipes are bundled with high-strength steel straps to prevent deformation during transit.
• Each pipe end is capped with plastic to protect against rust, dust, and debris contamination.
• Wrapped in moisture-proof film for humid regions (Southeast Asia/Africa) and anti-corrosion paper for deserts (Middle East).
• Large-diameter or high-value pipes are packed in wooden crates for extra protection.
• Placed on ISPM 15-certified wooden pallets for international shipping compliance.
• Clear labeling includes product name, grade, dimensions, batch number, and handling instructions.

Shipping

• Logistics Partners: Maersk, CMA CGM, Aramex, and regional heavy-cargo carriers for inland delivery to industrial facilities.
• Delivery Coverage: Port-to-port, door-to-door for major cities, and tailored solutions for remote oil fields, power plants, and chemical facilities.

RFQ Question: Do your alloy steel seamless pipes resist desert heat for oil & gas pipelines?

Answer: Yes, our ASTM A335 P22/P91 pipes withstand 600°C+ desert heat and high pressure. They’re Cr-Mo alloy enhanced for corrosion resistance, meet API standards, and include full compliance documents.

RFQ Question: Need acid-resistant pipes for chemical processing in tropical humid regions—what grade do you recommend?

Answer: We recommend 13CrMo44 or ASTM A335 P11 alloy pipes, engineered for acid resistance and tropical humidity. They feature seamless construction for leak-proof performance and meet regional chemical industry standards.

RFQ Question: Are your pipes suitable for power plant boiler systems in temperature-fluctuating regions?

Answer: Yes, our ASTM A213 T22/T91 pipes adapt to extreme temperature fluctuations (-10°C to 600°C+). They offer superior heat resistance and pressure-bearing capacity, compliant with ASME SA213 standards.

RFQ Question: Can you supply large-diameter (300mm+) alloy pipes for coastal petrochemical facilities?

Answer: Yes, our custom large-diameter (up to 850mm) ASTM A335 P5 pipes are designed for coastal petrochemical use. They resist saltwater corrosion and high temperatures, meeting EN 10216 standards.

RFQ Question: Do your alloy seamless pipes support chemical compatibility with industrial acids and solvents?

Answer: Yes, our 15Mo3 and ASTM A335 P11 pipes are chemically compatible with most industrial acids and solvents. They feature alloy-enhanced corrosion resistance and seamless construction to prevent leaks.