In modern water purification systems, the choice of pipework directly impacts purity, flow efficiency, and long-term maintenance. Our water processing stainless welded steel tube range is fabricated to meet rigorous hygienic standards, providing a smooth interior that prevents bacterial growth and scale buildup. For advanced filtration and chemical dosing lines, the water treatment grade stainless steel tubing ensures corrosion resistance against chlorides and disinfectants. Designed for submerged and exposed installations, the aquatic treatment stainless welded conduit delivers exceptional durability in tanks, dosing skids, and pump stations. Furthermore, the water system stainless steel welded tube series covers complete distribution networks, from high-pressure reverse osmosis trains to polished ultrapure water loops. Every welded joint is subjected to non-destructive eddy current or x-ray inspection and then passivated to restore the full chromium oxide layer, guaranteeing leak-free operation and compliance with NSF/ANSI 61 and ASME BPE guidelines.
Welded stainless pipe for water purification is engineered from AISI 304L and 316L austenitic alloys, with optional low-carbon grades that eliminate intergranular corrosion after welding. Each length is continuously formed from strip, welded using TIG or laser technologies without filler metal, and then cold-worked to precise ovality tolerances. The pipes undergo bright annealing in a hydrogen atmosphere to remove weld discoloration and optimize the 0.25–0.6 μm Ra surface finish. Common size ranges span 1/2 inch to 12 inch nominal diameter, with wall schedules from 5S to 40S. Our inventory offers custom cut-to-length services, end finishing (plain, beveled, or grooved), and full material traceability.
| Nominal Size (in) | OD (mm) | Wall Schedule | Wall Thickness (mm) | Weight (kg/m) | Typical Application |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 10S | 2.11 | 1.00 | Instrument air, sample lines |
| 1" | 33.4 | 10S | 2.77 | 2.09 | RO permeate, distribution |
| 2" | 60.3 | 10S | 2.77 | 3.94 | Chemical dosing, pre-filtration |
| 4" | 114.3 | 10S | 3.05 | 8.37 | Main water transfer headers |
| 6" | 168.3 | 10S | 3.40 | 13.81 | UF backwash lines, high-flow loops |
| 8" | 219.1 | 10S | 3.76 | 19.97 | Plant utility water jets |
| 10" | 273.0 | 10S | 4.19 | 27.78 | Distribution mains |
| 12" | 323.8 | 10S | 4.57 | 35.98 | Large-scale treatment plants |
Additional sizes, heavy-wall schedules (40S, 80S), and special alloy variations such as 2205 duplex and super austenitic 904L are available upon request. All dimensions conform to ASME B36.19, and the pipes are supplied with protective end caps and full heat traceability from melt to finished product.
