A192 seamless carbon steel boiler tubes for high-pressure service Description
A192 high-temperature tubes are seamless carbon steel tubes specifically designed for high-temperature and high-pressure boiler environments. Compliant with the American ASTM A192 standard, they exhibit superior strength, stability, and machinability under high-temperature conditions thanks to their material properties and optimized manufacturing processes. Core Characteristics:
Material Basis: Based on carbon steel, precise control of chemical composition (such as the content of carbon and manganese) and heat treatment processes ensures that the steel tube maintains a stable crystal structure at high temperatures. This design makes it less prone to structural degradation, such as grain boundary corrosion or embrittlement, under long-term high-temperature exposure.
Manufacturing Process: Seamless tubes are manufactured using hot rolling or cold drawing techniques. Hot rolling is suitable for mass production, ensuring efficiency; cold drawing further improves dimensional accuracy and surface finish, meeting the requirements of precision assembly.
ASTM A192 Chemical Composition:
| Steel Grade | Mfg. Process | ASTM A192 Chemical composition(%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Ni | Cr | Mo | Others | ||
| ASTM A192 | S | 0.06~0.18 | 0.25Max | 0.27~0.63 | 0.035Max | 0.035Max | - | - | - | - |
ASTM A192 Mechanical Property:
| Steel Standard | Steel Grade | Tensile Strength | Yield Strength (MPa) | Elongation (%) | Impact (J) | Hardness |
|---|---|---|---|---|---|---|
| not less than | not less than | not less than | not less than | |||
| ASTMA 192M ASME SA-192M | A 192/SA-192 | 180 | 35 | - | 77HRB(137HBW) |
Applications
Boiler Core Components: Widely used in the heating surface tubes of high-pressure and above pressure water-tube boilers, such as economizers (preheating boiler feedwater to improve thermal efficiency), superheaters (heating saturated steam into superheated steam), and reheaters (improving the steam's work capacity). These components come into direct contact with high-temperature, high-pressure water or steam, and the high-temperature strength and corrosion resistance of A192 tubes are a perfect match.
Industrial High-Temperature Equipment: In scenarios such as chemical reactors and petroleum refining equipment where high-temperature, high-pressure fluids need to be transported, A192 tubes serve as a key piping material, ensuring the safety and efficiency of fluid transmission.
Test and inspection
Flattening Test
Each batch should have both ends of two pipes subjected to a flattening test, with the test methods following ASTM A450, Division 19.
Flaring Test
Each batch should have both ends of two pipes subjected to a flattening test, with the test methods following ASTM A450, Division 21. These tubes shall be selected apart from those used for the flattening test.
Packaging and shipping
