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At Hemaokang Steel (Shandong) Co., Ltd., we are proud to offer the ASTM A53 Sch40 Low Carbon Steel Pipe 400mm Outer Diameter 20# Seamless — a high-performance solution engineered for demanding industrial applications. Our factory, established in 2025 with a strong export portfolio of US$50 million to US$100 million annually, ensures that every pipe meets rigorous quality standards. This seamless pipe combines the strength of 20# low carbon steel with the precision of ASTM A53 certification, delivering reliable performance in oil and gas, structural, and fluid transport systems.
The Schedule 40 wall thickness provides excellent pressure resistance while maintaining lightweight handling, making it suitable for both above-ground and underground installations. With an outer diameter of 400mm, this pipe is ideal for large-scale projects where durability and uniformity are critical. Our customers in North America, South America, Europe, and beyond trust Hemaokang Steel for consistent quality and on-time delivery.
Key Features & Technical Specifications
- Material: 20# low carbon steel (equivalent to ASTM A53 Gr.B) — excellent weldability and formability.
- Standard: ASTM A53 (Grade B) — ensures compliance with international piping codes.
- Wall Thickness: Schedule 40 — mechanical properties optimized for pressure and structural loads.
- Outer Diameter: 400mm (15.75 inches) — precision tolerance within ±1%.
- Manufacturing Process: Seamless — no weld seam, reducing risk of failure under high stress.
- Length Options: Standard 6m (20 ft) or custom lengths available upon request.
- Surface Finish: Black as standard; galvanized or anti-corrosion coating optional.
- End Finish: Plain, beveled, or threaded ends according to customer needs.
| Parameter | Value | Notes |
|---|---|---|
| Outer Diameter | 400 mm | Tolerance: ±1% |
| Wall Thickness (Sch40) | 12.70 mm (0.500 in) | Per ASTM A53 |
| Length | 6 m (standard) | Customizable |
| Yield Strength | ≥ 240 MPa (35,000 psi) | Per ASTM A53 Gr.B |
| Tensile Strength | ≥ 415 MPa (60,000 psi) | Per ASTM A53 Gr.B |
| Chemical Composition | C ≤ 0.30%, Mn ≤ 1.20% | Low carbon for welding |
Benefits for Your Projects
- Superior Durability: Seamless construction eliminates weak points, ensuring long service life under high pressure and temperature.
- Easy Installation: Uniform dimensions and smooth surface reduce friction, cutting labor and material costs.
- Versatile Applications: Suitable for oil refineries, chemical plants, water treatment, construction, and structural supports.
- Cost-Effective: Schedule 40 provides an optimal balance between strength and weight, reducing material usage without compromising safety.
- Global Compliance: ASTM A53 certification is recognized worldwide, simplifying import/export procedures.
Hemaokang Steel (Shandong) Co., Ltd. operates with a dedicated team of 51–100 employees and an annual export value exceeding US$50 million. We are ISO9001 certified, ensuring each pipe undergoes strict quality control from raw material selection to final packaging. Our main markets span North America, South America, Europe, Africa, Asia, and Oceania, demonstrating our ability to meet diverse regional requirements.
With our location in Liaocheng, Shandong, a major steel production hub in China, we benefit from efficient logistics and competitive pricing. We offer flexible packaging options (bundled, in crates, or loose) and prompt delivery schedules. Contact us today for a quotation or technical consultation — let Hemaokang Steel be your trusted partner for ASTM A53 seamless pipes.
Frequently Asked Questions (FAQ)
-
Q: What is the difference between seamless and welded pipe?
A: Seamless pipe is manufactured without a weld seam, offering higher strength, better pressure rating, and uniform grain structure. It is preferred for critical applications where reliability is essential. -
Q: Can the pipe be supplied in custom lengths?
A: Yes, we offer custom lengths from 3m to 12m. Please specify your requirements when placing an order. -
Q: Does this pipe come with a mill test certificate?
A: Yes, we provide a mill test certificate (MTC) per ASTM A53, including chemical composition and mechanical properties. Additional third-party inspection is available upon request. -
Q: What surface treatment options are available?
A: Standard is black (uncoated). We can also supply galvanized, varnished, or with anti-corrosion coating (e.g., FBE, 3LPE). Contact us for details. -
Q: What is the typical lead time?
A: For standard 6m lengths, lead time is 15–20 days after order confirmation. Custom lengths or coatings may require 25–30 days. -
Q: Is this pipe suitable for high-temperature service?
A: ASTM A53 Grade B is suitable for temperatures up to 400°F (204°C) in continuous service. For higher temperatures, consider ASTM A106 Grade B. -
Q: What packaging do you use for export?
A: We pack pipes in bundles with steel straps, or in wooden crates for smaller diameters. All packaging is seaworthy and meets international shipping standards. -
Q: Do you provide samples for testing?
A: Yes, we can provide a short sample (e.g., 30cm) for dimensional and material verification. Sample cost is nominal and shipping is paid by the client.
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