Yuhong Group Co., Ltd. supplies heat exchangers, pressure vessels, air coolers, tube bundles, U-tubes, finned tubes, tubesheets, baffles, and heads. Our focused authority is heat-exchanger tube application: material traceability, tube dimensional control, heat treatment, U-bending, and finning interfaces are controlled as one supply chain.
| Element | Requirement, % |
|---|---|
| C | 0.035 max |
| Mn | 2.00 max |
| P | 0.045 max |
| S | 0.030 max |
| Si | 0.75 max |
| Cr | 16.0-18.0 |
| Ni | 10.0-14.0 |
| Mo | 2.00-3.00 |
| Item | Requirement |
|---|---|
| Tensile strength, min | 70 ksi [485 MPa] |
| Yield strength, min | 25 ksi [170 MPa] |
| Elongation in 2 in. [50 mm], min | 35% |
| Hardness, max | 192 HBW / 200 HV / 90 HRB |
| Solution treatment | 1900°F [1040°C] min |
| Cooling | Water or other rapid cool |
TP316L tubes are furnished in the heat-treated condition. Under 6.2.2, direct quenching after hot forming is permitted for TP316L only when the tube temperature is not less than the minimum solution-treatment temperature. Otherwise, tubes must be reheated to the specified temperature for the required time before quenching.
| Stage | Requirement |
|---|---|
| Manufacture | Seamless process; hot finished or cold finished |
| Heat treatment | Per Table 3; solution treat and rapid cool |
| Hydrostatic / NDE | Each tube |
| Tensile test | One tube per lot ≤50 tubes; two tubes >50 tubes |
| Hardness test | Two tubes per lot |
| Flattening / flaring | One finished tube per lot, each end |
| Surface | Stainless tubes pickled free of scale; bright annealed may not require pickling |
Typical size range is 1/2 in. [3.2 mm] inside diameter to 5 in. [127 mm] outside diameter, with 0.015 to 0.500 in. [0.4 to 12.7 mm] wall thickness. Controlled variables include chemistry, solution temperature, cooling rate, straightness, ovality, and end finish.
Yuhong Group can match TP316L seamless tubes with U-bends, finned tubes, tube bundles, tubesheets, baffles, and heads. Within the ASTM A213/A213M scope, related grades include TP304/304L, TP316/316L, TP321/321H, TP347/347H, TP310S, and ferritic grades such as T5, T9, T11, T22, T91, and T92.
TP316L seamless tubes are selected for boilers, superheaters, heat exchangers, condensers, and pressure equipment in power generation, petrochemical, chemical, oil and gas, and general corrosive service. The low carbon content and molybdenum addition support welded fabrication and resistance to corrosive media.
TP316L has a lower maximum carbon content, 0.035%, which is preferred for welded and corrosive service.
Solution treatment at 1900°F [1040°C] minimum, followed by water or other rapid cooling.
Yes. Yuhong Group supplies U-tubes, tube bundles, and related heat-exchanger components.
