High pressure boiler tube is among the boiler tube, belonging to the seamless steel-tube category. Manufacturing approaches and seamless tube will be the same, but have rigorous request for producing steel utilized in the steel. High pressure boiler tubes are often in high pressure conditions and heat, when using the pipe underneath the action of corrosion and water vapor, oxidation and high temperature flue gas will happen. Prerequisites of steel pipe high oxidation corrosion resistance, with high rupture strength, and have great organizational stability. High pressure boiler tube is especially used to make high-stress and ultrahigh-strain boiler superheater tubes, reheater tube, airway, such as main steam pipe. High pressure boiler tubes are frequently in high-pressure conditions and high temperature, when using the pipe beneath the action of high-temperature flue gas and water vapour, oxidisation and corrosion will occur. Prerequisites of seamless metal pipe with large rupture strength, high oxidation corrosion resistance, and also have good organizational stability. High pressure boiler tube is especially used to produce high-pressure and ultrahigh-strain boiler superheater tubes, reheater tube like main steam pipe. High-pressure boiler tubes depth that is apparent. Clear depth of the high pressure boiler tubes shan't exceed the nominal wall thickness of the prejudice that is negative, its cleanup of the particular wall thickness of the wall thickness shan't be less than the minimum permitted. Prevent high-pressure boiler in the fireplace rapidly warming deformed drop-off, its measures are varied, the key will be to take an alternate strategy according to the conditions, such as the usage of insulating material, refractory steel obstacle direct flame burning, reduce the speed of heat-transfer delayed steel temperature, power becomes weak time. But regardless of what approach adopted, the theory is the same. Due to impurity components have an effect on the caliber of the high-pressure boiler, elevated quantities of damaging elements in steel goods and inclusion of control has very strict requirements, to try different impurity elements are required to control at really low amounts, generally in generation using secondary refining the generation process in order to safeguard its cleanliness. First, high pressure boiler conduit installation is not easy, notably in Super Critical no drum, raising heating pipe systems the
starting system, rigid ray volume than normal vital boilers big, amount, and all the warming surface welding, installation challenging. Frequently in high-pressure boiler tubes when when utilizing the pipe under the action of water vapor and high temperature gas, high temperature and pressure circumstances, oxidization and corrosion will occur. Boiler heating surface tubes working cooling conditions worsen, dry, therefore that the sudden rise in the short term wall temperature, the temperature reaches a critical level (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 brief busted overtemperature.
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