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Help CenterStainless Steel 304L Seamless Pipe, 1/4" to 4" NPS, 20ft Length, Annealed Condition
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your reliable partner for high-quality stainless steel products. Our Stainless Steel 304L Seamless Pipe (1/4" to 4" NPS, 20ft length, annealed condition) is engineered to deliver superior corrosion resistance, excellent weldability, and consistent mechanical properties. Backed by our ISO9001-certified quality management system and a dedicated team of 51–100 professionals, we ensure every pipe meets the rigorous demands of global industries such as oil & gas, chemical processing, and food production.
These pipes are manufactured from premium-grade 304L austenitic stainless steel, with a low carbon content that minimizes carbide precipitation during welding, making them ideal for heavy-gauge applications. The annealed condition restores ductility and removes internal stresses, resulting in a product that is easy to form, bend, and fabricate. With a wide size range from 1/4" to 4" NPS and a standard 20-foot length (customizable upon request), our seamless pipes are available in various wall thicknesses (Schedule 10S through 160S) to suit your specific pressure and flow requirements.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Material | UNS S30403 (304L) |
| Size Range (NPS) | 1/4" to 4" |
| Length | 20 ft (6.1 m) ± 0.125" |
| Condition | Annealed (solution heat treated) |
| Wall Thickness | Schedule 10S, 40S, 80S, 160S (customizable) |
| Surface Finish | Bright annealed or pickled |
| End Preparation | Plain end, beveled, or threaded (optional) |
| Testing | Hydrostatic, eddy current, tensile (available upon request) |
Product Features & Customer Benefits
- Excellent Corrosion Resistance – The 304L alloy resists oxidation and attack from many organic and inorganic chemicals, extending service life in harsh environments.
- Low Carbon Content – Reduces the risk of sensitization and intergranular corrosion during welding, ensuring strong, durable joints.
- Seamless Construction – No welded seams means higher pressure integrity, fewer leak points, and uniform wall thickness.
- Annealed Condition – Provides maximum ductility, making the pipe easy to bend, flare, and form without cracking.
- Wide Size Availability – From 1/4" to 4" NPS, we can supply a variety of schedules to meet different flow and pressure needs.
- Customizable Lengths – While standard is 20 ft, we can cut to exact lengths (e.g., 10 ft, 40 ft) to reduce waste and installation time.
- Global Compliance – Manufactured in accordance with ASTM A312/A269 and ASME B36.10, ensuring compatibility with international piping systems.
Why Choose Hemaokang Steel?
Established in 2025, Hemaokang Steel has rapidly grown into a trusted exporter with an annual export value of US$50 million – US$100 million. Our 51–100 dedicated employees operate a modern facility in Liaocheng, Shandong, China, and we serve markets across North America, South America, Europe, Africa, Oceania, and Asia. Our ISO9001 certification guarantees consistent quality, and our experienced team provides responsive technical support and after-sales service.
We understand that every project has unique requirements. That’s why we offer flexible customization on pipe dimensions, end finishes, and packaging. Whether you need a small quantity for a pilot plant or a bulk order for a large-scale pipeline, we can deliver on time and within budget.
Frequently Asked Questions (FAQ)
-
Q: What is the difference between 304 and 304L stainless steel pipe?
A: 304L has a lower carbon content (max 0.03%) compared to 304 (max 0.08%). This reduces the risk of carbide precipitation during welding, making 304L preferred for heavy-wall or welded applications where corrosion resistance is critical. -
Q: Can you provide pipes with different wall thicknesses (schedules)?
A: Yes, we offer various schedules including 10S, 40S, 80S, and 160S. Please specify your required schedule when ordering, or contact us for custom wall thickness options. -
Q: What is the standard delivery length? Can you cut to custom lengths?
A: The standard length is 20 feet (6.1 meters). We can also cut to any custom length, such as 10 ft, 15 ft, or 40 ft, with precise tolerances to minimize field cutting. -
Q: Are these pipes suitable for high-temperature service?
A: 304L stainless steel is commonly used in temperatures up to 800°C (1472°F) in continuous service, and up to 860°C (1580°F) in intermittent service. However, please consult our technical team for specific application conditions. -
Q: Do you provide third-party inspection reports?
A: Yes, we can arrange third-party inspections by SGS, BV, or other independent agencies at the buyer’s request. Mill test certificates and hydrostatic test reports are also available. -
Q: What is the typical lead time for an order?
A: For standard sizes and quantities, lead time is usually 15–20 days after confirmation. For larger orders or non-standard specifications, please allow 25–35 days. We always strive to meet urgent deadlines. -
Q: How do you ensure the pipes are free from defects?
A: Our ISO9001 quality system includes in-process inspection and final testing. Each pipe undergoes hydrostatic pressure testing, eddy current testing, and dimensional checks. We also offer ultrasonic testing upon request.
Contact Hemaokang Steel today to request a quotation or discuss your specific requirements. With our competitive pricing, reliable quality, and global shipping capability, we are ready to support your next project.
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