Boiler tube is installed inside boiler to heat water in order to generate seam, boiler is a a closed pressure vessel consist of 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 are necessary as per standard, and qualified by inspection and testing.
ASTM A213 and A249 are main specifications for stainless steel boiler tubes, covering seamless tubes as well as welded 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.
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.
Boiler Tube Sizes and Dimensions
Tube outside diameter: 12.7 mm, 25.88 mm, 19.05 mm, 25.4 mm, 31.8 mm, 38.1 mm, and smaller or larger.
Tube wall thickness: 0.71 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.65 mm, and average wall or minimum wall.
Length is random, up to 30 meters.
Outside diameter: plus / minus 0.1 mm.
Wall thickness: plus / minus 5%.
Tolerances of OD and wall are as per standard or on request.
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.