What is the maximum service temperature of high pressure boiler tube
Commonly used Chinese standard high-pressure boiler steel pipe steel and its maximum permissible temperature, high-pressure boiler tube working conditions are very poor, to be under high pressure and high temperature, in high-speed airflow, water, gas scouring and corrosion can be safe to work for 10 to 20 years, or even longer. High pressure boiler tube of different steel working temperature is also different, in general, the alloy material boiler tube than ordinary material carbon steel boiler tube working temperature is a little higher. The following are commonly used Chinese standard high-pressure boiler tube steel and its parameters.
| Steel Grade | Pipe calibre | Maximum permissible temperature℃ | Application |
| 20G | 小 | 480℃ | Water-cooled walls, economisers |
| 20G | 大 | 430℃ | Couplings, pipes |
| 20MnG,25MnG, | 小 | 480℃ | Water-cooled walls, economisers |
| 12CrMoG,15CrMoG | 小 | 510℃ | Water-cooled walls, economisers |
| 12CrMoG | 小 | 550℃ | Superheaters, reheaters |
| 15CrMoG | 大 | 510℃ | Couplings |
| 12Cr2MoG | 大 | 565℃ | Master tube, coupling box tube |
| 12Cr1MoVG | 小 | 580℃ | Superheaters, reheaters |
| 12Cr1MoVG | 大 | 565℃ | Master tube, coupling box tube |
| 12Cr2MoWVTiB | 小 | 600℃ | Superheaters, reheaters |
| 10Cr5MoWVSiTiB | 小 | 650℃ | Superheaters, reheaters |
| 10Cr9Mo1VNb | 大,小 | 650℃ | Main vessel tube, coupling box tube, superheater, reheater |
| 1Cr18Ni9 | 小 | 650℃ | Superheaters, reheaters |
| 1Cr18Ni11Nb | 小 | 650℃ | Superheaters, reheaters |


