ASTM A192 Carbon Steel Boiler Seamless Tubes For High-Pressure
|10#,20#, 45#,25Mn,E355(Q345B, St52),27SiMn|
|±1%, ±3%, ±5%|
Manufacturer of ASTM A192 Carbon Steel Boiler Seamless Tubes:
Boiler tube is a kind of seamless tube. The manufacturing method is the same as that of seamless
pipe, but there are strict requirements for the steel grade used in the manufacture of steel pipe.
According to the use temperature, it is divided into general boiler tube and high-pressure boiler tube.
The mechanical property of boiler tube is an important index to ensure the final service performance
(mechanical property) of steel, which depends on the chemical composition and heat treatment system
of steel. In the steel pipe standard, according to different application requirements, the tensile properties
(tensile strength, yield strength or yield point, elongation), hardness and toughness indexes, as well as
the high and low temperature properties required by users are specified.
① Generally, the service temperature of boiler tubes is below 350 ℃, and domestic tubes are mainly
made of No. 10 and No. 20 carbon steel hot-rolled tubes or cold drawn tubes.
② High pressure boiler tubes are often in high temperature and high pressure conditions when used.
The tubes will be oxidized and corroded under the action of high temperature flue gas and steam.
The steel pipe is required to have high lasting strength, high anti-oxidation and corrosion performance
and good structural stability.
Application for Boiler Tube:
① General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes,
superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke
tubes and arch brick tubes.
② High pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes,
air ducts, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.
Chemical Compositions and Mechanical properties for ASTM A192: