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Help CenterSeamless Steel Pipe API 5L X42 PSL1 8 Inch Schedule 40 for Water Transmission
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Hemaokang Steel (Shandong) Co., Ltd., established in 2025, is a reliable supplier of high-quality steel products. Our Seamless Steel Pipe API 5L X42 PSL1 8 inch Schedule 40 is specifically engineered for water transmission projects, offering exceptional strength, durability, and corrosion resistance. This pipe meets stringent industry standards, ensuring safe and efficient fluid transport over long distances. Backed by our ISO9001-certified manufacturing processes, we deliver consistent quality and on-time delivery to clients worldwide.
Our seamless pipes are manufactured using advanced piercing and rolling techniques, resulting in a homogeneous structure without any welded seams. This eliminates weak points and reduces the risk of leakage, making them ideal for high-pressure water systems. The X42 grade provides a minimum yield strength of 42,000 psi, ensuring reliable performance under demanding conditions.
Key Features & Technical Specifications:
- Standard: API 5L Specification for Line Pipe (PSL1 quality level).
- Grade: X42 – suitable for moderate pressure water and hydrocarbon transport.
- Size: 8 inch nominal bore (outer diameter 219.1 mm / 8.625 inches).
- Wall Thickness: Schedule 40 – 0.322 inch (8.18 mm), offering balanced strength and flow capacity.
- Seamless Construction: No longitudinal or spiral weld, ensuring uniform wall thickness and superior pressure retention.
- Surface Finish: Available in black painted, varnished, or oiled finish to prevent corrosion during transit and storage. Galvanized option available upon request.
- End Preparation: Plain end, beveled end, or threaded as per customer requirement.
Detailed Dimensional & Performance Data:
| Parameter | Value |
| Outer Diameter | 219.1 mm (8.625 in) |
| Wall Thickness | 8.18 mm (0.322 in) |
| Length | Random 5.8–12.0 m (19–39 ft), or fixed length per request |
| Minimum Yield Strength | 290 MPa (42,000 psi) |
| Minimum Tensile Strength | 414 MPa (60,000 psi) |
| Chemical Composition (typical) | C ≤0.26%, Mn ≤1.30%, P ≤0.030%, S ≤0.030% |
| Hydrostatic Test | Per API 5L, no leakage at specified pressure |
Benefits for Water Transmission Applications:
- High Flow Efficiency: Smooth internal surface reduces friction loss, enabling efficient water transfer.
- Excellent Corrosion Resistance: Optional galvanized or coated finishes extend service life in aggressive environments.
- Reliable Joint Integrity: Compatible with standard welding techniques and mechanical couplings.
- Cost-Effective Solution: Optimized wall thickness (Schedule 40) provides a good balance between material cost and pressure rating for moderate-pressure water systems.
- Ease of Installation: Precise dimensional tolerances simplify alignment and assembly.
Our Seamless Steel Pipe API 5L X42 PSL1 8 inch Schedule 40 is widely used for water transmission lines in municipal water supply, irrigation, industrial cooling systems, and fire fighting networks. The seamless construction ensures no weak spots, making it a preferred choice for underground and aboveground installations.
Why Choose Hemaokang Steel?
With an annual export value of US$50 million to US$100 million and a dedicated team of 51–100 employees, we are committed to delivering top-quality steel products. Our factory is located in Liaocheng, Shandong, a major steel production hub in China. We serve markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. Our ISO9001 certification ensures rigorous quality control at every stage – from raw material sourcing to final inspection. We offer flexible packaging, timely shipping, and responsive after-sales support to meet your project deadlines. Contact us today to discuss your water transmission requirements and request a quote.
Frequently Asked Questions (FAQ)
Q1: What is the difference between PSL1 and PSL2 for API 5L X42 pipe?
A: PSL1 has less stringent requirements for chemical composition and mechanical properties compared to PSL2. Our X42 PSL1 pipe is suitable for standard water transmission applications where moderate pressure and non-sour service are required. PSL2 offers higher toughness and strict CEV control for more demanding environments – available upon request.
Q2: Is this pipe suitable for underground water lines?
A: Yes. The seamless steel pipe can be used underground. However, we recommend applying an anti-corrosion coating (e.g., FBE or 3PE) if the soil is highly corrosive. Our standard black painted or oiled finish provides basic protection during storage; custom coating options are available.
Q3: What lengths are available for this 8-inch Schedule 40 pipe?
A: Standard random lengths range from 5.8 m to 12.0 m (approximately 19–39 feet). We can also supply fixed lengths (e.g., 6 m or 12 m) as per your project specifications. Please inform your required length when placing an order.
Q4: Does the pipe come with end caps or beveled ends?
A: Yes. We can provide plain ends, beveled ends (30° bevel for welding), or threaded ends according to your needs. End caps or pipe protectors are available for added safety during transport.
Q5: How does the price compare to welded steel pipe of the same size?
A: Seamless pipe generally costs more than ERW (electric resistance welded) pipe due to the more complex manufacturing process. However, seamless pipe offers higher reliability in high-pressure and critical applications. For moderate-pressure water lines, both options are valid – our team can help you choose the most cost-effective solution.
Q6: What is the maximum operating pressure for this Schedule 40 pipe?
A: Based on ASME B31.3 (fluid service), the maximum allowable pressure for 8-inch Schedule 40 seamless pipe is approximately 13.6 MPa (1,970 psi) at room temperature. For water transmission at normal temperatures, this is more than sufficient. Always verify with your engineer for specific design conditions.
Q7: Do you provide third-party inspection or certifications?
A: Yes. We can arrange third-party inspection by SGS, BV, or other agencies at your request. We also provide Mill Test Certificates (MTC) per EN 10204. Our ISO9001-certified quality management ensures full traceability.
Q8: What is the lead time for an order of this pipe?
A: Typical lead time is 2–4 weeks, depending on quantity and coating requirements. For urgent orders, we can prioritize production. Please contact our sales team for a specific delivery schedule.
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