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Help CenterDIN 1.4301 304 Stainless Steel Pipe 4 Inch Sch 10S Seamless For Pressure Vessel
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As a professional manufacturer based in Liaocheng, Shandong, China, Hemaokang Steel (Shandong) Co., Ltd. specializes in producing high-quality stainless steel pipes for critical industrial applications. Our DIN 1.4301 304 Stainless Steel Seamless Pipe 4 Inch Sch 10S is engineered to meet the demanding requirements of pressure vessels, heat exchangers, and boiler systems. With an annual export value ranging from US$50 million to US$100 million and ISO9001 certification, we ensure every pipe delivers consistent performance and reliability. Leveraging our experienced team of 51-100 employees and global supply chain capabilities, we offer this product as a cost-effective solution without compromising on safety or durability.
This product is manufactured under strict quality control from raw material selection to final inspection. The 304 stainless steel (equivalent to DIN 1.4301) provides excellent corrosion resistance, good formability, and high tensile strength, making it ideal for environments where pressure and temperature fluctuations occur. The seamless construction eliminates weld seams, reducing the risk of leakage and enhancing structural integrity. The Sch 10S wall thickness is specifically designed for moderate-pressure applications, allowing for efficient material usage while maintaining safety margins.
Key Features & Technical Specifications
- Material Composition: 304 stainless steel (0.08% max Carbon, 18-20% Chromium, 8-10.5% Nickel) – meets DIN 1.4301 and ASTM A312 requirements.
- Seamless Manufacturing: Hot-rolled or cold-drawn process ensures no longitudinal or spiral welds, resulting in uniform grain structure and enhanced pressure resistance.
- Dimensional Accuracy: 4-inch nominal diameter with Sch 10S wall thickness (0.120 inches / 3.05 mm) – tolerances adhere to ASTM A999 standards.
- Surface Finish: Standard pickled and annealed finish for clean, scale-free surfaces; optional bright annealing or polishing available upon request.
- Length Options: Standard random lengths of 6 meters (20 ft) or custom cut-to-length services to fit your project requirements.
- End Preparation: Plain ends, beveled ends, or threaded ends can be provided; plastic end caps are included for protection during transit.
- Inspection & Testing: Hydrostatic testing, eddy current testing, and dimensional inspection are performed on each batch to ensure compliance.
| Parameter | Value |
|---|---|
| Outer Diameter (OD) | 4.500 inches (114.3 mm) |
| Wall Thickness (Sch 10S) | 0.120 inches (3.05 mm) |
| Weight per Unit Length | Approx. 3.18 lbs/ft (4.73 kg/m) |
| Maximum Working Pressure | 480 psi (at 100°F) per ASME B31.3 |
| Yield Strength (min) | 30,000 psi (205 MPa) |
| Tensile Strength (min) | 75,000 psi (515 MPa) |
Why Choose Hemaokang Steel for Your Pressure Vessel Piping?
Our seamless stainless steel pipes are designed to offer exceptional performance in pressure vessel applications. The absence of weld seams means fewer stress concentration points, which directly translates to longer service life and reduced maintenance costs. Additionally, the 304 grade provides outstanding resistance to oxidation and mild corrosive environments, making it suitable for food processing, chemical storage, and pharmaceutical industries.
We understand that each project has unique requirements. That's why we offer flexible customization options including special lengths, different end preparations, and alternative surface finishes. Our quality management system, certified under ISO9001, ensures that every pipe undergoes rigorous testing before leaving our factory. With a dedicated export team and shipment from Qingdao port, we deliver to over 15 global markets including North America, Europe, Southeast Asia, and Africa.
Trusted by industries worldwide: As a newly established company in 2025 but with decades of combined industry experience, Hemaokang Steel has quickly built a reputation for reliability. Our annual export value of US$50 million–US$100 million reflects the confidence our customers place in us. We maintain a large inventory of raw materials and finished goods to ensure fast lead times, typically 7-15 days for standard sizes. For bulk orders or custom specifications, our engineering team is ready to provide technical support and cost-effective solutions.
We invite you to experience the difference of working with a supplier that prioritizes quality and customer satisfaction. Whether you need a single pipe for a small pressure vessel or a full-scale supply for an industrial plant, we are equipped to handle your requirements. Contact us today for a quotation and discover how our DIN 1.4301 304 Stainless Steel Seamless Pipe can enhance the safety and efficiency of your operations.
Frequently Asked Questions (FAQ)
1. What is the difference between Sch 10S and standard Schedule 10?
Sch 10S is specifically for stainless steel pipes and uses the same wall thickness as standard Schedule 10 for sizes up to 12 inches. However, for sizes 14 inches and above, Sch 10S has a thicker wall. Our 4-inch Sch 10S pipe has a wall thickness of 0.120 inches, which is identical to Schedule 10, but the “S” designation ensures compliance with stainless steel pressure ratings.
2. Can this pipe be used for high-temperature applications?
Yes, 304 stainless steel performs well in elevated temperatures up to 870°C (1600°F) in intermittent service and up to 925°C (1700°F) in continuous service. However, for pressure vessel applications, we recommend verifying the design code (e.g., ASME Section VIII) with your engineer to confirm the allowable stress at your specific operating temperature.
3. Do you provide mill test certificates (MTC) with each shipment?
Absolutely. Every order is accompanied by a Mill Test Certificate as per EN 10204 3.1 or similar standard. The certificate includes chemical analysis, mechanical properties, heat treatment details, and hydrostatic test results. Additional third-party inspection can be arranged at the buyer's cost.
4. What are the standard packaging and shipping methods?
Pipes are packed in bundles with steel straps, protected by plastic end caps and waterproof wrapping. For large orders, we use wooden crates or pallets to prevent damage during sea freight. We ship from Qingdao Port via container LCL/FCL or break-bulk, depending on order quantity. Lead time is typically 7-15 days after order confirmation.
5. Is this pipe suitable for food-grade applications?
Yes, 304 stainless steel is widely used in food processing equipment due to its corrosion resistance and non-reactive nature. The pickled and annealed surface finish provides a clean, easy-to-clean surface. However, if you require a specific surface roughness (e.g., Ra ≤ 0.8 μm), please let us know so we can arrange polishing.
6. Can you provide custom lengths and threading?
Yes, we offer custom cut-to-length services with tolerances as tight as ±2 mm. Threading (NPT or BSPT) and beveling are also available upon request. Please specify your requirements when placing the order; additional charges may apply for non-standard processing.
7. How does Hemaokang Steel ensure consistent quality across large volumes?
Our ISO9001-certified quality management system covers every step from raw material inbound inspection to finished product testing. We use automated NDT equipment (eddy current, ultrasonic) for seamless pipes and perform random destructive tests. With 51-100 skilled employees and a dedicated QC team, we maintain a defect rate of less than 0.5%.
8. What payment terms do you accept?
We accept T/T (30% deposit, 70% before shipment), L/C at sight, and for long-term clients we can negotiate other terms. Minimum order quantity is typically 1 ton for stock sizes. We also offer sample orders (1-2 pieces) for evaluation, with sample cost refunded upon bulk purchase.
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