Seamless Structure Pipes

1. Raw Material Preparation: 

Selection of high-quality steel billets (carbon/alloy/stainless steel) based on grade and application requirements.

2. Piercing: 

Heating steel billets to high temperatures and piercing to form a hollow shell using a mandrel mill, ensuring uniform wall thickness.

3. Rolling: 

Precision rolling of the hollow shell to achieve desired outer diameter and wall thickness, maintaining tight dimensional tolerances.

4. Sizing & Straightening: 

Calibrating the pipe to meet structural standards for roundness and straightness, ensuring easy fabrication and installation.

5. Heat Treatment: 

Annealing or quenching to enhance strength, toughness, and resistance to deformation—critical for load-bearing applications.

6. Surface Treatment: 

Application of optional galvanized/painted coatings (for corrosion resistance) or passivation (for stainless steel) to adapt to regional climates.

7. Quality Testing: 

Hydrostatic test, ultrasonic test (UT), and eddy current test (ECT) to verify structural integrity and compliance.

8. Packaging: 

Preparation for regional shipping with protective materials.

Superior Structural Integrity: 

Seamless construction eliminates welded joints, ensuring uniform strength and load-bearing capacity for building construction steel pipe needs.

High Strength & Durability: 

Withstands heavy loads and mechanical stress, ideal for bridges, high-rise frames, and industrial machinery supports.

Corrosion Resistance: 

Optional coatings and stainless steel grades resist desert humidity, coastal salt spray, and tropical rains across target regions.

Precision & Fabricability: 

Tight tolerances and smooth surface enable easy welding, machining, and integration with other structural components.

Climate Adaptability: 

Performs reliably in extreme temperatures (55°C+ desert heat, tropical humidity) and harsh environmental conditions.

Versatile Compatibility: 

Suits large diameter water pipeline projects and API 5L gas welded pipe procurement, meeting diverse construction needs.

Our Seamless Structure Pipes comply with international and regional standards for project approval:

• International Standards: ASTM, EN 10210, DIN 2448, JIS G3441, ISO
• Quality Certifications: ISO 9001, CE, API (upon request)
• Regional Compliance: SASO (Middle East), SONCAP (Africa), SNI (Indonesia), TIS (Thailand), ISIRI (West Asia)
• All orders include material test certificates (MTC), test reports, and compliance documents for customs clearance.

Packaging

• Pipes are bundled with high-strength steel straps to prevent deformation during transit.
• Fitted with plastic caps on ends to protect against rust, dust, and moisture.
• Wrapped in moisture-proof film for humid regions (Southeast Asia/Africa) and anti-corrosion paper for deserts (Middle East).
• Placed on ISPM 15-certified wooden pallets for international shipping compliance.
• Clear English labeling includes product name, grade, specs, batch number, and handling instructions.

Shipping

• Lead Time: Standard orders (≤100 tons): 15-25 working days; Bulk orders (＞100 tons): 25-35 working days; Customized orders: 20-30 working days.
• Logistics Partners: Maersk, CMA CGM, Aramex (Middle East), SICEPAT (Southeast Asia), GIGL (Africa).
• Delivery Coverage: Port-to-port, door-to-door for major cities, and inland transport to remote construction sites.

RFQ Question: Do your seamless structure pipes resist Middle East desert heat for high-rise construction?

Answer: Yes, our API 5L Gr. B seamless pipes withstand 55°C+ desert heat and heavy loads. They’re ideal for high-rise frames, with optional galvanized coating for dust resistance.

RFQ Question: Need pipes for Africa’s large diameter water pipeline—can they handle tropical rains?

Answer: We recommend ASTM A53 seamless pipes (OD 200-500mm) with corrosion-resistant coating. They resist tropical humidity and rains, meet SONCAP standards, and are suitable for municipal water projects.

RFQ Question: Are your pipes suitable for West Asia’s mountain bridge construction (temperature fluctuations)?

Answer: Our ASTM A335 P22 alloy steel pipes adapt to West Asia’s temperature changes (-10°C to 45°C). They offer high strength for bridge load-bearing, meet ISIRI standards.

RFQ Question: Can you supply Welded Structural pipe for Southeast Asia’s coastal industrial frames?

Answer: Yes, our ASTM A312 316 stainless steel pipes resist coastal salt spray. They’re ideal for industrial frames, easy to weld, and meet SNI standards.

RFQ Question: Do your pipes meet API 5L standards for gas-related structural components in the Middle East?

Answer: Our API 5L Gr. B seamless pipes comply with API 5L standards for non-pressure gas-related structural use.

RFQ Question: Need pipes for Africa’s rural school building (low-cost, load-bearing)—what’s recommended?

Answer: We recommend ASTM A53 seamless pipes (OD 50-150mm, WT 5-10mm) for rural school construction. They’re cost-effective, load-bearing, and resist tropical rains.