Products Description
ASTM A269 Welded Capillary Stainless Steel Tube
Advantages of ASTM A269 Welded Capillary Stainless Steel Tube
- Dimensionally Accurate: ASTM A269 Welded Capillary Stainless Steel Tube's tight OD/ID tolerances and smooth internal surface provide consistent flow rates and precise pressure transmission, ensuring accurate readings in hydraulic and pneumatic systems.
- Corrosion Resistance: Stainless steel offers excellent corrosion resistance to acids, bases, and process chemicals, extending the life of the tubing, reducing downtime caused by corrosion-related failures, and maintaining the purity of the process fluid.
- Cost-Effective: Compared to seamless tubing, ASTM A269 Welded Capillary Stainless Steel Tube can be produced in large quantities at a lower cost.
applications of ASTM A269 Welded Capillary Stainless Steel Tube
- Boiler, Heat Exchanger, and Condenser Systems: Used in heat exchanger coils, condenser, and feedwater heater piping.
- Instrumentation and Control Systems: Used in pressure transmitters, thermocouples, and flowmeter measuring tubes, as well as capillaries for hydraulic and pneumatic control lines.
- Chemical and Petrochemical Industries: Used in the transport of corrosive process media, chemical injection systems, and sample conditioning.
- Medical and Pharmaceutical Equipment: Used in metering systems, surgical instruments, and cannulas.
- Automotive and Aerospace Systems: Used in precision fluid lines for fuel, brake, and hydraulic systems.
Chemical Composition
| Grade | C (%) | Mn (%) | P (%) | S (%) | Si (%) | Cr (%) | Ni (%) | Mo (%) | Nb/Ti (%) |
| TP201 | ≤0.15 | 5.5–7.5 | ≤0.06 | ≤0.03 | ≤1.00 | 16.0–18.0 | 3.5–5.5 | - | - |
| TP304L | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤0.75 | 18.0–20.0 | 8.0–12.0 | - | - |
| TP316L | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤0.75 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | - |
| TP348 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤0.75 | 17.0–19.0 | 9.0–13.0 | - | Nb: 10xC – 1.10 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| Requirement | ≥ 515 | ≥ 205 | ≥ 35 | ≤ 90 (for austenitic grades) |
Possible Alternative Grades
- TP321/TP347: Stabilized grades suitable for high-temperature service
- TP904L: Excellent resistance to chloride corrosion
- Duplex Steel 2205/2507: Higher strength and improved resistance to stress corrosion cracking
- Alloy 825/Alloy 625: Suitable for highly corrosive chemical environments
Packaging
Once the pipes have passed all inspections and tests, they are ready for packaging. They are usually packaged in bales wrapped in plastic. The pipes can be bundled and ready for delivery according to customer requirements, ensuring that the pipes are protected during transportation and prevent surface damage.
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