DONGSHANG STAINLESS produce TIG welding stainless steel tubing for boiler, heat exchanger, condenser, excellent performance in corrosive environment.
Boiler Tube Introduction
Boiler tube is installed inside boiler to heat water in order to generate steam, boiler is a a closed pressure vessel designed in varieties of types, water tube boiler and fire tube boiler are main types.
Tubes inside boiler withstand water and steam pressure, in order to prevent tubes leak in damage, quality boiler tubes withstand high pressure and heat resistance.
Boiler Tube Standard Specifications
ASTM A213 for seamless tube and A249 for welded tube are main specifications for stainless steel boiler tubes.
Tubes are processed by cold drawn, heat treated and pickling finishes, cleaning and smooth surface inside and outside should be made, quality tubes have the capacity of standing in high pressure and high temperature conditions。
Stainless Steel Grades
Boiler tube material selection is definitely important, different grades suit to different type of boilers, tubes have to meet complex boiler environments, like Heat Pass location and flow direction, boiler pressure, temperature, steaming rate, and boiler material etc。
Heat resisting grades:
These stainless steels have high strength and good corrosion resistance in high temperate condition, good properties result from varieties addition of alloy, stainless steel boiler tube can meet high pressure and temperature requirement。
Sizes and Dimensions of Boiler Tube
We have capability and capacity to ensure boiler tube in superior condition, with advanced inspection and testing procedures, standard tests include dimensional examination, visual checking, chemical composition, mechanical properties as well as non destructive test 100% eddy current test.
Fire Tube Boiler
Fire-tube boiler is a type of boiler in which hot gas passes from the fire through one or more pipes that pass through a sealed water container. The heat of the gas is transferred through the wall of the tube through heat conduction, heating the water and eventually generating steam. Fire tube boilers are the third of the four historical types of boilers: low-pressure tank or “haystack” boilers, flue boilers with one or two large flues, fire tube boilers and high-pressure boilers with many small tubes
Water Tube Boiler
Water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. The fuel is burned in the furnace to produce hot gas, which heats the water in the steam generation tube. In smaller boilers, the additional power generation tubes are separated in the furnace, while larger utility boilers rely on water injection tubes that make up the furnace wall to generate steam. High-pressure water tube boiler: The hot water then rises into the steam drum. Here, saturated steam is drawn away from the top of the drum
Boiler Tube Failure
Corrosion, Water side and Fire side
Boiler Tube Material Grade
304, 304L, 316, 316l, 321, 237, and with suffix “H”.