High pressure boiler tube is among the boiler tube, belonging to the seamless steel-tube category. Seamless tube and manufacturing processes would be the exact same, but have rigorous request for manufacturing steel used in the metal. High pressure boiler tubes are commonly in high-pressure conditions and heat, when using the conduit underneath the action of high-temperature flue gas and aqueous vapor, oxidisation and corrosion will happen. Necessities of steel conduit with high rupture strength, oxidation corrosion resistance that is high, and have great organizational stability. High pressure boiler tube is especially used to produce high-pressure and ultrahigh-pressure boiler superheater tubes, reheater tube including main steam pipe. High pressure boiler tubes are often in high temperature and high-pressure conditions, when utilizing the conduit under the action of corrosion and gaseous water, oxidation and high temperature flue gas will occur. Prerequisites of seamless metal pipe oxidation corrosion resistance that is high, with large rupture strength, and also have good organizational stability. High pressure boiler tube is mainly used to fabricate high-stress and ultra-high-strain boiler superheater tubes, reheater tube, airway, for example steam pipe. High pressure boiler tubes obvious depth. Prevent high-pressure boiler in the fire rapidly warming deformed slump, its steps are varied, the important thing is to take an alternate approach according to the conditions, including the usage of insulation, refractory steel barrier direct flame burning, decrease the speed of heat-transfer delayed steel temperature, strength becomes weak time. But no matter what process adopted, the principle is exactly the same. Because of impurity components affect the caliber of the high-pressure boiler, elevated levels of damaging elements in steel products and inclusion of control has quite strict requirements, to attempt various impurity components are required to command at very low amounts, generally in creation using secondary refining the production procedure in order to guard its cleanliness. First, high-pressure boiler pipe setup is difficult, notably in Supercritical no drum, raising heating pipe systems, the starting program, rigid beam volume than standard crucial boilers big, quantity, and all of the warming surface welding, installation challenging. Generally in high-pressure boiler tubes when using high temperature and pressure conditions, the pipe beneath the action of water vapour and high temperature fuel, oxidisation and corrosion will occur. Boiler heating surface tubes running cooling conditions worsen, dry, so that a surprising rise in the temporary wall temperature, the temperature reaches a critical level (Ac1) above, a sharp drop in the tensile strength of high pressure boiler tube, pipe stress exceeds the yield limitation, resulting in shear break and burst pipes, busted pipes called this short burst overtemperature.
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