A210C seamless steel pipe - SA-210C internally threaded steel pipe A210C corresponds to the domestic material 25MnG seamless pipe. A210C is a material in the American seamless steel pipe standard. The correct name is SA-210C. It implements the American standard ASTM A210M-U.S. According to the standards of the Institute of Materials and Testing, A210C seamless steel pipes are suitable for boiler tubes and boiler flue tubes, including safety ends, domes and support tubes, and small wall thickness seamless medium carbon steel tubes for superheater tubes.
SA-210C internally threaded steel pipe is a pipe with a spiral inner hole. Because its inner wall has a concave and convex internal thread shape, it can effectively prevent laminar flow when the medium flows slowly in the steel pipe, and can inhibit the inner wall of the steel pipe. The vapor film effect improves the heat transfer effect of the boiler water wall and makes the tube wall temperature more uniform.
(1) Have sufficient lasting strength;
(2) Sufficient plastic deformation ability;
(3) Aging tendency and thermal brittleness are minimal;
(4) High resistance to oxidation, coal ash, high temperature corrosion of natural gas, steam and stress corrosion;
(5) Good organizational stability and good process performance. The steel types of high-pressure boiler tubes include carbon steel, pearlitic steel, ferritic steel, austenitic stainless steel and heat-resistant steel. In order to improve the thermal efficiency of thermal power units and reduce fuel consumption, countries around the world focus on the development of large-capacity, high-parameter (high temperature, high pressure) thermal power units (above 1000MW). The steam pressure increases to 31.5~34.3MPa, and the superheated steam temperature reaches 595~650℃.
A210C seamless pipes undergo various tests such as flattening test, flaring test, hardness test, hydrostatic test, and non-destructive electric tests to ensure their compliance with the specified standards.
