Small Diameter Stainless Steel Tubing

DONGSHANG Stainless specializes in manufacturing precision small diameter tubing with stainless steel and nickel alloys, size range from 1。5 mm to 88。9 mm in outside diameter, minimum wall thickness down to 0。05 mm, in many cases, the capillary tube requires precise dimensions, we have equipment to provide bright annealed tubing with inline eddy current test。

Both seamless and welded small diameter stainless steel tubing are offered to suit various applications, tubing is cold drawn finish in soft or hard condition, and both straight tubing and coil tubing are available, tubing length can be up to 3000 meters in single length, also other bend tubing for special use.

Small Diameter Tubing Sizes

We have a very wide range of tubing using advanced techniques to bring solution, such as hypodermic tubing, fractional tubing, medical tubing, metric tubing, tube length can be very long, and ver short as component or machine part。

Thin wall and extra thin wall tubing are available upon request, standard and custom sizes of small diameter tubing below, the unit is mm.

OD/T0.05 – 0.070.07 – 0.10.1 – 0.140.14 – 0.190.19 – 0.240.24 – 0.390.39 – 0.490.49 – 0.990.99 – 1.41.4 – 2.0
0.2 – 0.3
0.3 – 0.4
0.4 – 0.5
0.5 – 0.8
0.8 – 1.0
1.0 – 1.5
1.5 – 2.0
2.0 – 2.5
2.5 – 3.0
3.0 – 3.5
3.5 – 4.0
4.0 – 5.0
5.0 – 6.0
6.0 – 8.0
Other small diameter sizes are available, for example, heat exchanger tube sizes

High Precision Tubing

  • Outside diameter, the precise tolerance +/- 0.05 mm
  • Wall Thickness, the best tolerance +/-0.03 mm
  • Ends: cut clean and burr removed, small bore tubing, special for thin wall tubing, is hard to cut, it is easy to deform, so it requires advanced machines and tools.
  • Inside diameter

For relative larger diameter tubing, precise dimensions is available depending on requirement, for example, EN 1127 specified tolerance classifications, D4/T4 is more strict tolerance in outside diameter and wall thickness.

Stainless Steel Material

Stainless steel typically are high strength, corrosion resistant and high pressure material, with other excellent properties, stainless steel tubing is able to withstand a variety of severe environment, generally, seamless tubing have higher strength than welded tubing, users can select proper type according to pressure requirement.

  • 300 Series, 304/304L, 316/316L
  • 904L
  • 400 Series, 409, 410, 416, 420, 440
  • Alloy 825
  • Alloy 600
  • Alloy 625

Seamless Tubing

Cold drawn seamless tubing is manufactured from hollow billet in annealing and bright annealed condition, cold rolling, cold drawing, finishing, straightening, grinding, cutting to length, and nondestructive testing are key processes to produce, in high pressure condition, seamless tubing is usually required to resist pressure.

Welded And Drawn Tubing

Welded tubing can obtain high quality finish using TIG welding method, and grinding inside and outside to make welded tube as close to seamless as possible, welded tubing has close and tight tolerance, cost saving and more smooth surface features, usually, polishing is processing inside and outside to maintain tubing clean and sanitary.

Cold drawing can modify the tube’s ID, OD, and wall thickness to achieve desirable sizes, and also improve the surface finish and refine the grain structure, and usually can’t see the weld seam with the naked eye.

Small Diameter Tube Application

  • Automotive
  • HVAC
  • Petro-chemical
  • Power generation
  • Oil & gas recovery
  • Medical
  • Food & beverage
  • Machinery
  • Instrumentation
Small Diameter Stainless Steel Tubing
Stainless Steel Fractional Tubing