Stainless steel gas tube for pure gas lines mostly are stainless steel bright annealed tubes or stainless steel mechanical polished tubes. And for ultra high purity gas tubing, people will usually use electropolished stainless steel tubing (EP tubes).
Younglee’s precision steel tube factory manufactures and supplies a wide range of stainless steel gas tubes for gas delivery (gas convey) and gas distribution, especially designed for high purity gas convey systems.
Specifications
Our stainless steel gas tubing is produced according to ASTM A 269, A270, A632, or EN ISO standard EN 10216-5.
Materials of stainless steel gas tube
Mostly the most popular material of stainless gas tube is AISI 316L, because 316L stainless steel tubing has stable composition and high performance of corrosion resistance, which greatly ensure the purity of the gas in the tubing.
Besides 316L stainless steel tubing, we also manufactures stainless steel high purity tubing in materials of 304 / 304L, 316 Ti, 321 /321H and so on.
Besides ASTM standards, we also produce pure gas tubing in stainless steel grades according to EN standard as 1.4401 /1.4404, 1.4301/1.4307, 1.4541, 1.4571 etc.
High Purity Stainless Steel Tube Sizes
We produce and supply stainless steel pure tubes in metric sizes and imperial sizes. The size range of our high performance stainless steel tubing is O.D 5 mm to O.D 50.8 mm.
Inch Stainless steel tubing sizes chart
| Size (inch) | O.D.(Inch) | Wall thickness (inch) | Maximum Safe Working Pressure Rate | |
| PSI | Bar | |||
| 1/8″ | 0.125 | 0.028 | 7806 | 538 |
| 1/4″ | 0.25 | 0.035 | 4598 | 317 |
| 1/4″ | 0.25 | 0.039 | 5189 | 358 |
| 3/8″ | 0.375 | 0.035 | 2974 | 205 |
| 3/8″ | 0.375 | 0.039 | 3341 | 230 |
| 1/2″ | 0.375 | 0.049 | 3136 | 216 |
| 3/4″ | 0.75 | 0.065 | 2759 | 190 |
| 1″ | 1 | 0.065 | 2039 | 141 |
| 1-1/4″ | 1.25 | 0.065 | 1600 | 111 |
| 1-1/2″ | 1.5 | 0.065 | 1340 | 92 |
| 2″ | 2 | 0.065 | 995 | 69 |
We also supply other stainless steel tubing sizes upon customer’s request.
Metric mm stainless steel tube sizes chart
| O.D.(mm) | Wall thickness (mm) | O.D.(mm) | Wall thickness (mm) |
| 6 | 1 | 20 | 1.5 |
| 6 | 1.5 | 20 | 2 |
| 8 | 1 | 20 | 2.5 |
| 8 | 1.5 | 20 | 3 |
| 8 | 2 | 22 | 2 |
| 10 | 1 | 22 | 2.5 |
| 10 | 1.5 | 25 | 2 |
| 10 | 2 | 25 | 2.5 |
| 12 | 1 | 25 | 3 |
| 12 | 1.5 | 28 | 2 |
| 12 | 2 | 28 | 2.5 |
| 14 | 2 | 28 | 3 |
| 15 | 1 | 30 | 3 |
| 15 | 1.5 | 30 | 4 |
| 15 | 2 | 35 | 3 |
| 16 | 1 | 38 | 3 |
| 16 | 1.5 | 38 | 4 |
| 16 | 2 | 38 | 5 |
| 16 | 3 | 42 | 2 |
| 18 | 1.5 | 42 | 3 |
| 18 | 2 | 50 | 5 |
Surface Finishing & Surface Roughness
Younglee’s supplies stainless steel gas tubing in below three surface finish upon customers’ requirements.
· Bright annealed (BA tube)
Bright annealed stainless steel tubing is supplied with bright inner surface and outer surface. The surface roughness of tube inner can be Ra 0.3 μm to 0.8 μm upon customers’ request.
· Mechanical polished
Inner mechanical polished tubing is supplied with surface roughness max. Ra 0.6 μm.
· Electropolished (EP tube)
Electropolishing stainless steel tubing is mostly used as ultra high purity stainless steel tubing. The roughness of EP tube can be as good as surface roughness Ra 0.2 μm.
Applications
In various industries, when pure gas delivery or pure gas distribution is needed, people will mostly use stainless steel gas tubing. For example, when building a biology lab or a chemical laboratory, normally people will need stainless steel tubes to build the laboratory gas lines, these tubes are known as lab supply gas tubing. The application industrial fields including below.
- Laboratory engineering: Lab gas lines, Lab gas tubes
- Semiconductor industry:
HOOK-UP BA tube, HOOK-UP EP tube, HOOK-UP stainless steel tube, HOOK-UP CDA stainless steel tubes.
- Pharmaceuticals
- High purity gas industry
- Food & Beverage industry
- Bulk Gas industry
- Fine Chemical industry
- Precision Instruments
- CDA industry
- Special gas industries