Different uses of steel in accordance with the actual use and working conditions for the various reaction to pipe size tolerance, surface quality, substance composition, mechanical properties, process performance, and other special properties such as, different technical conditions.
General seamless steel tubes for conveying water, gas, oil pipelines and manufacture of liquid structural components, the reply to its mechanical properties such as ultimate tensile strength, yield strength and elongation for the sample test. Duct generally work under conditions of pressure, also called pressure test done and flaring, squash, curling and other process performance tests. For large-scale long-distance commodity future trading, processed oil, natural gas sewerlines with a pipe is to raise the carbon equivalent, welding performance, low-temperature toughness, stress corrosion under harsh conditions, corrosion, corrosion tiredness strength and corrosion environment and other requirements. Regular boiler tubes used in the manufacture of structural steel pipe and superheated steam boilers boiling drinking water pipes. High-pressure boiler tubes for high pressure or high pressure superheated vapor boilers, heat exchangers and pipes for high pressure equipment.
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