Product Introduction

API 5L X56M PSL2 Seamless Steel Pipe SCH40 6inch -30inch This water supply pipe is made of Q235B and Q355B non-alloy carbon steel, specially developed for clean water transportation, municipal water supply and drainage pipeline systems. Manufactured in compliance with ASTM, JIS and GB standards, it comes with complete certification documents. The standard fixed length is 6 meters per piece, and custom lengths are available upon project requirements.

Two grades are offered to meet different working pressure requirements of water supply projects. Q235B has excellent ductility and weldability, easy for fabrication, ideal for low-pressure water distribution, park pipelines and irrigation lines. Q355B features higher yield strength, superior load resistance and better anti-deformation performance, suitable for deeply buried main water pipelines with high water pressure and heavy external load.

Key Advantages

✅ Multiple anti-corrosion options for extended service life

Available surface treatments: anti-rust oil, black paint, hot-dip galvanizing and 3PE coating. 3PE coating features strong adhesion, great resistance to soil acid & alkali and moisture penetration, effectively slowing down corrosion for buried pipelines. Hot-dip galvanized layer is uniform and dense, perfect for above-ground installation and humid conditions, cutting long-term maintenance and replacement cost. Smooth inner wall reduces water flow resistance, saves pumping energy and minimizes sediment buildup and scaling.

✅ Standardized production & complete documents for smooth export

Produced under ASTM and JIS specifications. Every batch passes hydrostatic test, non-destructive testing (NDT), dimension and visual inspection. Mill Test Certificate (MTC) and full chemical & mechanical test reports are provided for every shipment, satisfying document review requirements from overseas contractors, EPC companies and supervisors. Tight tolerance on OD, wall thickness and straightness ensures neat bevel ends and easy on-site welding, reducing construction rework.

✅ Flexible processing & one-stop supporting service

Custom processing services available: cutting to length, beveling, threading, flange welding and prefabrication with fittings. Wide range of sizes kept in stock for fast delivery. Mass production orders are accepted with reliable lead time. We can supply matching pipe fittings including elbows, tees, reducers and flanges as a complete package, helping buyers simplify procurement.

✅ Good weldability for easy on-site installation

The non-alloy steel substrate delivers stable welding performance, compatible with SMAW and GTAW welding methods. Q355B version offers better low-temperature impact resistance, suitable for outdoor water projects in temperate and subtropical regions. Moderate weight facilitates hoisting and laying work. Widely adopted in municipal renovation, new water plants, rural drinking water projects, factory circulating water and agricultural irrigation systems.