TP316L BA (Bright Annealed) tubes are thermally treated in a controlled atmosphere to achieve a clean, scale-free finish, while TP316L EP (Electropolished) tubes are chemically polished to achieve even smoother, ultra-clean surfaces with Ra < 0.25μm.
Pharmaceutical:Clean piping, WFI systems, injectable water lines
Semiconductor:Chemical distribution, UHP gas lines
Biotech:lFermentation tanks, transfer lines
Laboratory:High-purity fluid handling systems
Chemical Process:Low-contamination acid or base transfer lines
| Property | Details |
|---|---|
| Standard | ASTM A269 |
| Grade | TP316L (UNS S31603, EN 1.4404) |
| Tube Type | Welded or seamless |
| Surface Finish | Bright Annealed (BA) |
| Diameter Range | 6mm – 101.6mm (1/4" – 4") |
| Wall Thickness | 0.5mm – 2.0mm |
| Length | Fixed length or random (up to 6 meters) |
| Tolerances | As per ASTM A269 / ASTM A632 standards |
| Testing | Eddy current, PMI, pressure, surface roughness |
Formula (for round tube):Weight (kg/m) = (OD - WT) × WT × 0.02466
Where:
OD = outer diameter (mm)
WT = wall thickness (mm)
Gnee also offers custom weight calculators or weight per piece based on size and finish.
At Gnee, we specialize in supplying high-purity 316L stainless steel BA tubes with:
Certified Quality: ASTM A269 + EN 10204 3.1 / 3.2
Ultra-clean packaging: PE bag + capped ends + export crate
Electropolished (EP) or mechanical polished (MP) options available
Surface roughness test reports, PMI, and pressure testing included
Global shipping with full export documentation
Custom fabrication and OEM support for projects and systems
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Pitting Resistance Test
Intergranular Corrosion (IGC) Test
Flaring Test, Flattening Test
Hydrostatic Test
Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
Q: Can these tubes be used for orbital welding?
A: Yes. Our ASTM A269 TP316L BA tubes have consistent dimensions and clean ID/OD surfaces ideal for orbital and autogenous welding.
Q: What's the MOQ for polished 316L BA tubes?
A: Gnee supports flexible MOQ options based on project needs-starting from 100 meters in most cases.
