321 321H Stainless Steel Capillary Pipe
Type：Seamless or Welded
Technique：Cold Finished/Argon Arc Welding
Material：Stainless Steel
Surface Treatment：Annealing and Pickling/Polished
Section Shape：Round
Length：Customized by Client and Typically 6000mm
Transport Package：Sea-Worthy Packing
Specification：OD 6.35~762mm
321 321H Thin Wall Stainless Steel Capillary Tube
321 stainless steel capillary (UNS S32100): low carbon titanium stabilized austenitic steel, mainly resistant to high temperature oxidation and intergranular corrosion below 700°C, suitable for chemical pipelines and heat exchangers;
321H stainless steel capillary (UNS S32109): high carbon reinforced type, focusing on 850°C long-term high temperature and high pressure scenarios, meeting ASME boiler and pressure vessel standards (such as power station superheater tubes).
321 321H Bright Annealing Stainless Steel Capillary Tube
Advantages of 321 321H Stainless Steel Capillary Pipe
321H stainless steel capillary tube is a high carbon modified version of 321 stainless steel. The carbon content is higher than that of 321 stainless steel. The high carbon content makes 321H stainless steel have better strength and stability in high temperature environment, especially in oxidizing medium. 321H is more resistant to acid corrosion at lower temperatures.
The high temperature resistance range of 321 stainless steel precision tube is roughly between 427~816℃, and 321H can withstand higher temperatures due to its high carbon content. It is usually used in environments exceeding 538℃
321H stainless steel capillary tube is often used as a heat-resistant steel material due to its excellent high temperature resistance and creep resistance. It is suitable for manufacturing steel pipes and pipe fittings such as boiler superheaters, heat exchangers, condensers, catalytic tubes, and cracking tube devices.
Reasons to choose GNEE:
GNEE products have been exported to 60 countries including India, Thailand, Iran, Brazil, Egypt, etc. GNEE has passed ISO9001 quality management system certification, American Petroleum Institute API-5CT, API-5L certification, special equipment production license, BV certification and other third-party certifications.
GNEE provides additional services such as machining, bending, painting, heat treatment, cutting, drilling, beveling, tempering, surface treatment, etc.
321 321H Stainless Steel Seamless Capillary pipe Specification
| Parameter | 321 | 321H |
|---|---|---|
| Outer Diameter (mm) | 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0, 20.0, 25.0 | Same as 321 (Custom sizes available) |
| Wall Thickness (mm) | 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5, 2.0 | Same as 321 |
| Wall Thickness Tolerance | ±0.05mm (for wall thickness ≤1.0mm); ±0.10mm (for wall thickness >1.0mm) | Same as 321 |
| Length (m) | 1.0, 2.0, 3.0, 4.0, 5.0 (Custom lengths: 0.5m–12.0m) | Same as 321 |
| Surface Finish | Bright Annealed (Ra≤0.8μm); Pickled (oxide-free) | Same as 321 |
| Material Grade | S32100 (321) | S32109 (321H) |
| Standards Compliance | GB/T 14976, ASTM A213, GB/T 3089 | ASME SA213, ASTM A213, EN 10216-5 |
| Typical Applications | General high-temperature pipelines, heat exchangers, instrumentation tubing | High-pressure/high-temperature boilers, petrochemical reactors, aerospace systems |
Stainless Steel Capillary Tube Exporters
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GNEE participated in Vietnam exhibition
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