High Pressure SS Heat Exchanger Pipe Seamless Construction Custom Wall Thickness
High pressure heat exchanger tube is specifically designed to withstand extreme internal and external pressures while maintaining efficient heat transfer performance. Manufactured from high-strength stainless steel and nickel alloys, these tubes are essential for applications where both pressure resistance and thermal efficiency are critical. Available in seamless construction to eliminate weld line weaknesses.
| Parameter | Details |
|---|---|
| Applicable Standards | ASTM A213, ASME SA213, EN 10216-5, DIN 28180, NACE MR0175 |
| Common Grades | TP304 / 304L, TP316 / 316L, TP321, TP347, Duplex 2205, Super Duplex 2507, Alloy 625 |
| OD Range | 6mm – 50.8mm (1/4″ to 2″) |
| Wall Thickness Range | 1.5mm – 8mm (0.065″ to 0.315″) |
| Length | Up to 15m straight lengths |
| Construction Type | Seamless (SMLS) only – no welded construction for high pressure |
| Process | Hot finished or Cold drawn + Solution annealing |
| Surface Finish | Bright annealed or pickled |
| Delivery Condition | Solution annealed – ready for bending and installation |
| Pressure Rating (Typical) | Up to 15,000 psi (check specific dimensions) |
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| TP316L | ≤0.035 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| TP321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | – | Ti 5*C% |
| TP347 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | – | Nb 10*C% |
| Duplex 2205 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | N 0.08-0.20 |
| Super Duplex 2507 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.020 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | N 0.24-0.32 |
| Alloy 625 | ≤0.10 | ≤0.50 | ≤0.50 | ≤0.015 | ≤0.015 | 20.0-23.0 | 58.0 min | 8.0-10.0 | Nb+Ta 3.15-4.15 |
Full mill test reports (MTR) and third-party inspection available.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness | Max Working Pressure* |
|---|---|---|---|---|---|
| TP316L | ≥485 | ≥170 | ≥35 | ≤90 HRB | 6,000 psi |
| TP321 | ≥515 | ≥205 | ≥35 | ≤90 HRB | 6,500 psi |
| TP347 | ≥515 | ≥205 | ≥35 | ≤90 HRB | 6,500 psi |
| Duplex 2205 | ≥620 | ≥450 | ≥25 | ≤293 HB | 10,000 psi |
| Super Duplex 2507 | ≥800 | ≥550 | ≥25 | ≤310 HB | 12,000 psi |
| Alloy 625 | ≥830 | ≥415 | ≥30 | ≤100 HRB | 15,000 psi |
Maximum working pressure is approximate for 1/2″ OD * 0.065″ wall at room temperature. Consult engineering data for exact ratings.
| Wall Thickness (inch) | Working Pressure (psi) – 316L | Working Pressure (psi) – Duplex 2205 |
|---|---|---|
| 0.049″ (1.24mm) | 3,500 | 6,000 |
| 0.065″ (1.65mm) | 5,000 | 8,500 |
| 0.083″ (2.11mm) | 7,000 | 11,000 |
| 0.095″ (2.41mm) | 8,500 | 13,000 |
| 0.120″ (3.05mm) | 11,000 | 16,000 |
*Ratings based on ASTM A213 seamless tube @ 100°F (38°C). De-rating factors apply at elevated temperatures.*
High pressure heat exchanger tubes are critical in demanding thermal and pressure environments:
| Industry | Typical Uses | Why High Pressure Grade? |
|---|---|---|
| Oil & Gas | Feedwater heaters, high-pressure condensers, gas coolers | Extreme pressure and temperature cycling |
| Power Generation | Superheaters, reheaters, nuclear steam generators | High-temperature steam at elevated pressure |
| Chemical Processing | High-pressure reactors, synthesis gas coolers | Corrosive media under high pressure |
| Hydrogen Industry | Hydrogen coolers, heat exchangers | Hydrogen embrittlement resistance (Duplex) |
| Hydraulic Systems | Oil coolers for high-pressure hydraulics | Pressure spikes and fatigue resistance |
| Aerospace | Heat exchangers for engine and hydraulic systems | Extreme reliability requirements |
| Subsea | Subsea coolers, umbilical heat exchangers | External hydrostatic pressure resistance |
| Advantage | Benefit |
|---|---|
| Seamless construction | No weld line weakness – maximum burst strength |
| Thick wall capability | Withstands extreme internal pressures |
| High strength alloys | Duplex and super duplex for pressure + corrosion |
| Thermal fatigue resistance | Withstands rapid temperature changes |
| NACE MR0175 compliance | Suitable for sour service (H₂S environment) |
| Hydrostatic tested | 100% verified for leak-free performance |
| Traceability | Full material traceability from melt to final tube |
| Factor | Consideration |
|---|---|
| Wall thickness | Must be calculated based on internal pressure (Barlow's formula) |
| Material selection | Higher strength alloys allow thinner walls at same pressure |
| Bend radius | U-bends require larger radii to avoid wall thinning |
| Thermal expansion | Must be accommodated – U-tube design recommended |
| Testing | Hydrostatic or pneumatic testing required after fabrication |
For samples, mill test reports (MTR), pressure rating charts, or a custom quote, please contact us.
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