Stainless Steel Tubing Welded & Seamless

We offer welded and seamless stainless steel tubing as ASTM A269 specification in general, stainless steel include 304/340L, 316/316L, 321 and duplex steels grades, there are a large sizes of tubing for option, and average wall and minimium wall in various thickness, finishes have annealing pickling, bright annealing and polishing.

Stainless Steel Tubing Specifications

Standard ASTM A213, A249, A269, A554
Grade 304, 304L, 316L, 321, 347, 310S, 2205 etc.
Tubing type Welded tubing
Seamless tubing
Finishes Annealing pickling
Bright Annealing
Outside diameter 1/8″ to 6″
Wall Thickness 0.02″ to 0.25″

Stainless Steel Tubing Sizes Chart

There are varieties of stainless steel grades for tubing, AUSTENITIC, FERRITIC, DUPLEX and special grades are available, the most used grades are 304, 340L, 316, 316L.

304/304L Stainless Steel Tubing

Grade C Mn P S Si Ni Cr
TP304 0.08 2.00 0.045 0.030 1.0 8-11 18-20
TP304L 0.035 2.00 0.045 0.030 1.0 8-13 18-20

316/316L Stainless Steel Tubing

Grade C Mn P S Si Ni Cr Mo
316 0.08 2.00 0.045 0.030 1.0 11-14 16-18 2-3
316L 0.035 2.00 0.045 0.030 1.0 10-14 16-18 2-3

Permissible Variations in Dimensions of ASTM A269

OD Wall L
<38.1mm ±0.13mm OD<12.7mm ±15%
OD≥12.7mm ±10%
OD<38.1mm +3.20mm -0mm
OD≥38.1mm +4.80 -0mm
≥38.1mm~88.9mm ±0.25mm
≥88.9mm~139.7mm ±0.38mm
≥139.7mm~203.7mm ±0.76mm
≥203.7mm~304.8mm ±1.01mm
≥304.8mm~355.6mm ±1.26mm

Testing and inspection

Stainless Steel Tubing Application

Stainless steel tubing is wide used for bear, food, beverage processing, heat exchanger, boiler and condenser system, also applied in mechanical and structure purpose, ASTM A269 specification can be executed dual specification with others, such as with ASTM A249 for welded tube, with ASTM A213 for seamless tube.

Heat Exchanger Tube

  • U bend tube
  • Tube coil

Mechanical Tubing

  • Round tube
  • Square tubing
  • Rectangular tubing
A269 304 stainless steel tubing316L stainless steel tubingstainless steel coiled tubewelded seamless stainless steel U bending tube