High pressure boiler tube is just one of the boiler tube, of the the seamless steel tube class. Production methods and tube are the exact same, but have strict request for making steel utilized in the steel. High pressure boiler tubes are often in high pressure conditions and high temperature, when using the conduit under the action of oxidisation and water vapour, high temperature flue gas and corrosion can happen. Necessities of steel conduit high oxidation corrosion resistance, with high rupture strength, and have great organizational stability. High pressure boiler tube is especially used to make high pressure and ultra-high-pressure boiler superheater tubes, reheater tube, airway, for example steam pipe. High pressure boiler tubes are generally in high temperature and high pressure conditions, when utilizing the conduit below the action of corrosion and water vapor, oxidation and high-temperature flue gas will occur. Requirements of seamless steel pipe with high rupture strength, high oxidation corrosion resistance, and also have great organizational stability. High pressure boiler tube is especially used to make high pressure and ultra-high-pressure boiler superheater tubes, reheater tube including main steam pipe. High pressure boiler tubes depth that is clear. Clear depth of the high pressure boiler tubes shan't exceed the nominal wall thickness of the bias that is unfavorable, its cleanup of the specific wall thickness of the wall thickness shan't be less compared to the minimum allowed. Prevent high-pressure boiler in the fire quickly warming deformed drop-off, its measures are varied, the key is always to take a different approach with regards to the circumstances, such as the utilization of insulating material, refractory steel impediment direct flame burning, reduce the rate of
heat transfer delayed metal temperature, power becomes feeble time. But no matter what
procedure adopted, the theory is exactly the same. Fire retardant coating is a hearth in recent years more sophisticated measures. Because of impurity components affect the grade of the high pressure boiler, elevated levels of damaging elements in steel products and inclusion of control has quite strict demands, to try various impurity elements are required to command at very low levels, frequently in production using secondary refining the production process to be able to guard its cleanliness. First, high pressure boiler pipe setup is tough, especially in Super Critical no drum, raising heating pipe systems the starting method, stiff beam volume than standard crucial boilers substantial, amount, and all the warming surface welding, installation difficult. Frequently in high pressure boiler tubes when when utilizing heat and pressure circumstances, the pipe below the action of aqueous vapor and high temperature gas, oxidisation and corrosion will occur. Boiler heating surface tubes running cooling conditions worsen, dry, so a surprising increase in the temporary wall temperature, the temperature reaches a critical point (Ac1) above, a sharp decline in the tensile strength of high pressure boiler tube, pipe tension exceeds the yield limit, resulting in shear fracture and busted pipes, busted pipes called this short burst overtemperature.
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