| Application: | Heat Exchanger | Type: | Fin Tube |
|---|---|---|---|
| Standard: | P9 | Package: | Standard Package |
| High Light: | P9 Studded Finned Tube， Evaporator Finned Tube， ASTM A335 Condenser Studded Tube | ||
Studded Fin Tube ASTM A335 Gr. P9 Heat Exchanger Condenser Evaporator Oil Gas
What is Studded Finned Tube?
Automatic pin tube welding machine will be a series of cylindrical welding on the surface of the steel pipe， its characteristics are: 1， quadrilateral circumferential equal distribution of welding 2， hexagonal circumferential equal distribution of welding
Compared with the traditional needle-shaped tube manufacturing process， quadrilateral， hexagonal needle-shaped tube to strengthen the heat transfer element， using welding a molding， change the past welding after the use of tooling forced stretching molding after the welding pin has fallen off phenomenon， so that the needle-shaped tube welding more solid， welding pin is not easy to fall off. Needle-shaped tube welding needle， diameter， length， longitudinal spacing， circumferential welding needle pin number and pin inclination are factors that affect the heat transfer of the needle-shaped tube. Therefore， it must be considered comprehensively and systematically in order to have more practical application. The use of four-sided and six-sided circumferential equal distribution of welded and needle-shaped tube， with a larger expansion surface， and needle-shaped tube on the fluid has a disturbing effect， can significantly improve the heat transfer coefficient， especially for high viscosity oil， heavy oil and other media to strengthen the heat transfer occasions.
Chemical Composition OF ASTM A335 Gr.P9
| CHEMICAL COMPOSITION (%) | ||||||
| C， max | Mn | P， max | S， max | Si | Cr | Mo |
| 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
Mechanical Propertie OF ASTM A335 Gr.P9
| MECHANICAL PROPERTIES | ||
| Tensile Strength， ksi [MPa]， min | Yield Strength， ksi [MPa]， min | Elongation (%)， min |
| 60 [415] | 30 [205] | 30 |
Equivalent OF ASME A335 Gr.P9
| ASTM | ASME | UNS | BS | ISO | JIS G 3458 |
| A335 P9 | SA335 P9 | S50400 | 3604 P1 629-470 | 2604 II TS38 | STPA 26 |
Application:
Heat exchanger
Condenser
Evaporator
Oil Gas
Chemical
