Product Specification and Size :
1):OUTER DIAMETER: 1MM-5MM
WALL THICKNESS: 0.25MM-0.5MM
2)::SURFACE: Surface: 180HL, 320G, 400G, 500G, 600G
3):DECORATION TUBES: ROUND, SQUARE, RECTANGLE
4):MOQ：30Kg
5):GRADE: GRADE: AISI 304, 304L, 316L, 316Ti, 321, 201, 202, 430, etc.
DESCRIPTION OF STAINLESS STEEL CAPILLARY TUBES
High-precision, seamless stainless steel capillary tubes have been widely used in various instrument measurement applications. Based on thick-walled, small-diameter structures (usually 1/8 inch or smaller), this tube is used for critical applications in jet resistance from nuclear reactors to aerospace.
Because high-quality seamless capillaries are made of a single homogeneous steel with a continuous, uninterrupted grain structure, it is more suitable for applications that require consistent materials throughout the pipeline. Discontinuities in welding and mechanical parts can exacerbate crevice corrosion and mechanical failure.
Chemical Composition of Stainless steel capillary tubes
| Chemical Composition | |||||||
| Grade | C | Si | Mn | P | S | Ni | Cr |
| 201 | 0.15 | 1.00 | 5.50-7.50 | 0.06 | 0.03 | 3.50-5.50 | 16.00-18.00 |
| 202 | 0.15 | 1.00 | 7.50-10.00 | 0.06 | 0.03 | 4.00-6.00 | 17.00-19.00 |
| 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.00-11.00 | 18.00-20.00 |
| 304L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 8.00-12.00 | 18.00-20.00 |
| 309 | 0.20 | 1.00 | 2.00 | 0.045 | 0.03 | 12.00-15.00 | 22.00-24.00 |
| 309S | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 12.00-15.00 | 22.00-24.00 |
| 310 | 0.25 | 1.50 | 2.00 | 0.045 | 0.03 | 19.00-22.00 | 24.00-26.00 |
| 310S | 0.08 | 1.50 | 2.00 | 0.035 | 0.03 | 19.00-22.00 | 24.00-26.00 |
| 316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 10.00-14.00 | 16.00-18.00 |
| 316L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 10.00-14.00 | 16.00-18.00 |
| 316Ti | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 10.00-14.00 | 16.00-18.00 |
| 410 | 0.15 | 1.00 | 1.00 | 0.04 | 0.03 | 0.60 | 11.50-13.50 |
| 430 | 0.12 | 0.75 | 1.00 | 0.04 | 0.03 | 0.60 | 16.00-18.00 |
High-precision capillaries have been used in many instrument systems, including:
HPLC tube
UPLC tube
Coriolis
Remote sealed pressure transmitter tube
Sheath
Hydraulic tubing
Some applications require longer stainless steel coils and will not accept joints (welds or fittings) for a long time. However, in many important capillary applications, shorter tube lengths are required.
