Stainless Steel Seamless Tubing
Seamless Stainless Steel Tube ASTM A269/A213 TP316/316L Dimension Specifications: ASTM A269 – Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service ASTM A213 – Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes Material Specifications: TP316 TP316L Finishing: Annealed and Pickled (AP) Polished, 320 Grit Bright Annealed (BA) Recommended Bend Radius A bend radius of 3x the external tube diameter is recommended for cold bending of tubes with tube benders or by hand. (As per Figure 1) Welding Suitability Tubes made of TP316 & TP316L are suitable for arc welding according to usual techniques. The welding filler should be selected in accordance with DIN EN 1600 and DIN EN 12072 part 1 taking into account the type of application and the welding technique
Electropolished (EP) Tubing
For applications with surface finish requirements well beyond the quality realized in a standard mill finish, we maintain an inventory of electropolished stainless steel tubing in diameters ranging from 1/8” through 1”. Through submersion in an electrically charged electrolyte solution bath, a smooth uniform surface is created by dissolving imperfections. This process removes any contamination on or just below the tube’s surface and passivates it, bolstering the corrosion resistance of the steel. EP stainless steel tubing is typically used in the following applications:
- Sample lines for H2S in chemical processing
- Semiconductor fabrication
- Sanitary piping systems
- Pharmaceutical manufacturing
Certified Cleanliness
The pharmaceutical, petrochemical, food & beverage and semiconductor industries all have applications where fine smoothing of the tube is critical for heightened cleanliness, the removal of occluded gases or friction reduction imperatives.
Stocked in a 316/316L chemistry with a maximum hardness of RB 90, the surface finish of the tube internal surface is certified to have a maximum roughness of 10 micro-inches Ra. The governing specifications for EP tubing are ASTM A269, A632 and A1016.
In ISO Class 4 clean room conditions, each tube is purged with ultra high purity (UHP) nitrogen and then capped and double bagged. Certification qualifying the tubing’s production standards, chemical composition, material traceability and maximum surface roughness is provided for all material.
Product Specifications ASTM A269, A213 / ASME SA213
