ASTM A192 seamles carbon steel boiler tube----- American Society for Testing Materials standard
ASME SA192 seamles carbon steel boiler tube --- American Society of Mechanical Engineers standards
High-pressure seamless carbon steel bolier tube purposes:
Generally it is used for high-pressure boiler (working pressure does not exceed 9.8Mpa and the working temperature between 450 ℃ -650 ℃) heating surface tubes, header, economizer, superheater, reheater. Seamless Carbon Steel Boiler and Superheater (P <9.8MPa, 450 ℃ <T <650 ℃) often applied at the high pressure with a minimum wall thickness steel pipe. Carbon steel boiler tube grade: A192. Boiler tubes due to the long-term high temperature and pressure conditions, the material will creep, ductility and toughness decreased original organizational change, resulting in corrosion.
Steel tube used as boiler should have:
(1) sufficient rupture strength;
(2) sufficient plastic deformation capacity;
(3) The minimum aging tendency and hot brittleness;
(4) high resistance to oxidation, resistance to coal ash and gas high temperature resistance, corrosion, steam and stress corrosion;
(5), good organizational stability and good processing properties. High-pressure boiler steel tube contains carbon steel and pearlitic, ferritic and austenitic heat-resistant stainless steel. In order to improve the thermal efficiency of thermal power generating units to reduce fuel consumption, and countries around the world are the development of large capacity and high parameters (high temperature, high pressure) thermal power units (1000MW) dominated. Steam pressure up to 31.5 ~ 34.3MPa, the superheated steam temperature of 595 ~ 650 ℃, to the development of ultra-high pressure critical pressure, a higher demand this high-pressure boiler tubes. To this end the development of new steels to meet the needs and the needs of high-parameter power plant boiler.