ASTM A312 TP304L Stainless Steel Seamless Pipe For Water Treatment
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If you are looking for stainless steel pipes suitable for water treatment, pure water purification, and municipal water supply applications, offering low carbon content, corrosion resistance, and hygienic safety, GNEE provides a full range of ASTM A312/ASME SA312 TP304L seamless stainless steel pipes. These are suitable for reverse osmosis equipment, wastewater treatment pipelines, and drinking water transmission systems.
Our 304L stainless steel pipes offer 35% better resistance to chloride ion corrosion in water compared to standard 304 stainless steel.In a 25℃ municipal wastewater environment, the corrosion rate is ≤0.002 mm/year. They also possess a tensile strength of ≥485 MPa and a yield strength of ≥170 MPa, meeting the pressure requirements for water treatment pipelines. We prioritize compliance with water treatment industry standards, with 100% spectral material testing of raw materials.
Our TP304L seamless stainless steel pipes undergo hydrostatic testing (1.5 times the working pressure) and passivation layer integrity testing. Each batch comes with an MTC material certificate and food-grade contact certification. Diameter tolerances are controlled within ±0.05mm, and the 2B/BA surface treatment ensures no impurity residue. We offer customized specifications with outer diameters from 10-325mm and wall thicknesses from 1.0-15mm. Stock orders are delivered quickly within 7-12 days, ensuring water quality safety and long-term stable operation of the pipelines.
🔹 304L SS Pipe Specification
| Specification | ASTM A312 / ASME SA312 |
| Outside Diameter | 1/2" To 48" |
| Schedule | SCH 5 To SCH XXS |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Ends | Plain End, Beveled End, Threaded |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Length | 6M Or As Custom, Single Random, Double Random , Standard & Cut length |
ASTM A312 TP304/ TP304L seamless pipes are generally furnished in sizes 1/2″ through 24″, while ASTM A312 TP304/ TP304L welded pipes are available from 1-1/2″ through 48″. The wall thicknesses shall be furnished in accordance with ASME B36.10M or ASME B36.19M. The pipes are usually supplied in lengths of 6.096 m (20′), 12.19 m (40′), 6 m, and 12 m, etc. No pipe shall be under the specified length and no pipe shall be more than 0.25″ [6 mm] over the specified length.
For custom orders, please contact us!
🔹 304L stainless steel Round Pipe Chemical Composition:
| Grade | Si | C | Mn | Cr | P | S | Ni | |
| TP304L | min. | - | - | - | 18 | - | - | 8 |
| max. | 1 | 0.03 | 2 | 20 | 0.045 | 0.03 | 12 | |
🔹 ASTM A312 304L Stainless Steel Polished Pipe Mechanical Properties:
| Tensile Strength, min. MPa [ksi] |
485 Mpa - 70 Ksi |
| Yield Strength, min. MPa [ksi] |
170 Mpa - 25 Ksi |
| Elongation, min, (% in 50mm) | 40% |
🔹 ASTM A312 Stainless Steel Pipe Dimension
|
Materials |
Outer Diameter |
Wall Thickness |
Length |
Standard |
|
Austenitic Duplex Steel Nickel Alloy Cobalt Alloy Ferrite |
8-711mm DN6-DN700 1/8"-28" |
1-50mm Sch5s -SchXXS |
≤12m |
ASTM-A312 ASTM-A790 ASTM-A269 ASTM-B167/163 ASTM-B444 ASTM-B622 ASTM-B423 ... |
|
Item Standard |
Outside Diameter |
Thickness |
Length |
|||
|
ASTM A312 |
O.D.≤ 48.26mm + 0.40mm - 0.80mm 48.26mm ＜ O.D.≤ 114.3mm ± 0.80mm 114.3mm ＜ O.D.≤ 219.1mm + 1.60mm - 0.80mm 219.1mm ＜ O.D.≤ 457.2mm + 2.40mm - 0.80mm 457.2mm ＜ O.D.≤ 660.4mm + 3.20mm - 0.80mm 660.4mm ＜ O.D.≤ 863.6mm + 4.00mm - 0.80mm 863.6mm ＜ O.D.≤ 1219mm + 4.80mm - 0.80mm |
+ 15% '- 12.5% |
L≤7.3m +6.0mm - 0mm |
|||
🔹 ASTM A312 TP304L Stainless Steel Seamless Pipe Surface Finish
| Surface Finish | Internal Surface(ID) | Exterbal Surface(OD) | |||
| Roughness Average(RA) | Roughness Average(RA) | ||||
| μ inch | μm | μ inch | μm | ||
| AP | Annealed & Pickled | Not defined | Not defined | 40 or Not defined | 1.0 or Not defined |
| BA | Beight Annealed | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| MP | Mechanical Polish | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| EP | Electro Polish | 15,10,7,5 | 0.38,0.25,0.20;0.13 | 32 | 0.8 |
🔹 Applications:
Potable Water Lines: Safe for transporting drinking water.
Desalination Plants: Resistant to high-chloride, synthetic environments.
Water Treatment Facilities: Used in pipelines requiring high hygiene, such as Cleaning-in-Place (CIP) systems.
Waste Water Systems: Resistant to corrosion from industrial and municipal sewage.
🔹SS 304L pipe suppliers
If you have project requirements for 304L stainless steel bright annealed tubes, please feel free to place an order. GNEE maintains a large inventory of popular products for your selection. These tubes can be processed into a variety of practical forms, including seamless and welded. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.
🔹 Packaging and Delivery
| Item | Details |
|---|---|
| Price Terms | FOB, CFR, CIF (as per Incoterms® 2020) |
| Package | Waterproof paper, edge protection, wooden pallets or crates |
| Loading Port | Tianjin, Qingdao, Shanghai, or any major Chinese seaport |
| Container Capacity | 1×20ft: Max 25 Tons, Max 5.8m length 1×40ft: Max 25 Tons, Max 11.8m length |
| Delivery Time | 7–15 working days depending on order quantity |
