In modern waterworks infrastructure, material selection determines long-term reliability and operational cost. Our water processing stainless welded steel tube range is engineered specifically for aggressive aqueous environments, offering exceptional resistance to chloride-induced pitting and crevice corrosion. For high-purity applications, the water treatment grade stainless steel tubing meets ASTM A312 and ASME SA312 standards, ensuring consistent wall thickness and ovality control in every length. When the system demands fully traceable longitudinal welds with 100% radiography, the welded stainless pipe for water purification provides a smooth internal bead profile that minimizes biofilm accumulation and pressure drop. For outdoor or submerged conveyance, the aquatic treatment stainless welded conduit features a solution-annealed weld zone that restores full corrosion resistance, making it suitable for raw water, backwash, and chemical feed lines across municipal and industrial water facilities.
Waterworks stainless welded steel piping is manufactured through an automated longitudinal forming and welding process that yields exceptional dimensional consistency and mechanical integrity. The material is typically grade 304/304L or 316/316L stainless steel, with the low-carbon variants recommended for welded applications to prevent intergranular attack in the heat-affected zone. Each pipe undergoes hydrostatic testing, eddy current inspection, and final passivation to remove free iron and surface contaminants. The product line covers diameters from ½ inch to 48 inches with schedules ranging from 5S to 80S, allowing engineers to optimize flow velocity and pressure containment. A comprehensive array of fittings, flanges, and end connections simplifies field assembly while maintaining the hygienic characteristics of the system. Below are the detailed technical parameters presented in list and table formats for quick reference.
| Nominal Size (NPS) | OD (inches) | Schedule 10S Wall (inches) | Schedule 40S Wall (inches) | Maximum Working Pressure (psi) @ 100°F - 304L | Theoretical Weight (lb/ft) - SCH 10S |
|---|---|---|---|---|---|
| 1/2" | 0.840 | 0.083 | 0.109 | 3730 | 0.67 |
| 1" | 1.315 | 0.109 | 0.133 | 3050 | 1.40 |
| 2" | 2.375 | 0.109 | 0.154 | 1730 | 2.64 |
| 3" | 3.500 | 0.120 | 0.216 | 1100 | 4.33 |
| 4" | 4.500 | 0.120 | 0.237 | 870 | 5.61 |
| 6" | 6.625 | 0.134 | 0.280 | 680 | 9.29 |
| 8" | 8.625 | 0.148 | 0.322 | 560 | 13.40 |
| 10" | 10.750 | 0.165 | 0.365 | 510 | 18.70 |
| 12" | 12.750 | 0.180 | 0.406 | 450 | 24.20 |
The weld seam is designed to match the base metal composition after annealing, eliminating galvanic corrosion sites and ensuring uniform mechanical properties across the pipe circumference. With controlled ferrite content and enhanced passivity, the piping system supports strict water quality standards including NSF/ANSI 61 and AWWA C220. Standard lengths are 20 feet random, with cut-to-length options available for modular skid fabrication and retrofit projects. Dedicated packaging and marking protect the surface finish during transit, and full material traceability is maintained from heat number to final installation.
