High pressure boiler tube is among the boiler tube, belonging to the seamless steel tube type. Tube and production approaches would be the same, but have strict request for producing steel used in the metal. High pressure boiler tubes are frequently in high temperature and high-pressure conditions, when utilizing the pipe underneath the action of water vapour and high-temperature flue gas, oxidisation 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 mainly used to fabricate high-pressure and ultrahigh-strain boiler superheater tubes, reheater tube like main steam pipe. High pressure boiler tubes are generally in high-pressure conditions and high temperature, when using the pipe below the action of high-temperature flue gas and gaseous water, oxidization and corrosion will occur. Requirements of seamless steel pipe high oxidation corrosion resistance, with high rupture strength, and also have great organizational stability. High pressure boiler tube is especially used to make high-pressure and ultrahigh-strain boiler superheater tubes, reheater tube, airway, including steam pipe. High-pressure boiler tubes clear depth. Affect the results of unsaturated resin; chlorinated unsaturated polyester resin using a top amount of firmness, exceptional high temperature oxidizing acids and moist chlorine and other oxidizing medium, superb resistance to chlorine answer medium and heat resistance, higher sequence under pressure to work with, often considered warming surface tube layout is quite thick. Depth of the high-pressure boiler tubes shall not exceed the nominal wall thickness of the unfavorable bias, its clean up of the actual wall thickness of the wall thickness shan't be less compared to the minimum permitted. Prevent high-pressure boiler in the fireplace rapidly warming deformed slump, its steps are varied, the important thing will be to take an alternate strategy determined by the circumstances, including the usage of insulating material, refractory steel obstacle direct flame burning, reduce the speed of heat-transfer delayed metal temperature, strength becomes feeble time. But regardless of what approach adopted, the principle is exactly the same. Fire retardant coating is a fireplace in recent years heightened technical measures. Due to impurity components affect the caliber of the high-pressure boiler, high quantities of damaging elements in steel products and inclusion of control has very strict requirements, to try various impurity components must command at really low amounts, generally in generation using secondary refining the production process to be able to secure its cleanliness. First, high-pressure boiler pipe installation is not easy, especially in Super Critical no drum, increasing heating pipe systems the starting system, stiff ray volume than normal essential boilers substantial, measure, and each of the warming surface welding, installation hard. Commonly in high-pressure boiler tubes when when utilizing the pipe underneath the action of aqueous vapor and high-temperature fuel, high temperature and pressure circumstances, oxidation and corrosion will occur. Boiler warming surface tubes working cooling conditions worsen, dry, so that a surprising rise in the short-term wall temperature, the temperature reaches a critical point (Ac1) above, a sharp drop in the tensile strength of high-pressure boiler tube, pipe stress exceeds the yield limit, resulting in shear fracture and burst pipes, busted pipes called this short burst overtemperature.
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