High pressure central heating boiler steel pipe is an important resources for power plant heating system, which is mostly utilized in the manufacture of water wall surface, economizer, superheater, reheater as well as steam and water connecting pipeline of different parts of power plant central heating boiler. Nuclear power plant boiler has high requirements for high pressure steel pipeline: enough toughness, that is, higher return limit and toughness restriction; Good sturdiness to guarantee that the external lots load does not take place fragile failure; Good process efficiency, including hot and cold developing and also welding performance. Excellent low-fold structure and surface area quality, no cracks and also white spots are allowed; Materials utilized for heat elements should have excellent high temperature residential properties, including enough creep stamina, resilient stamina and also sturdy plasticity, great high temperature microstructure stability and also high temperature oxidation resistance, etc. Alloy high stress boiler steel tubes are widely made use of in ultra supercritical units.Do you recognize what's the boiler tube materials grades?