SA213 T91 is the grade of ASME SA213 is a the austenite steel pipe of the standard minimum wall thickness suitable for Boiler and Superheater seamless ferritic and austenitic steel pipe and heat exchanger.
ASTM A213 Standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes. Grades containing the letter H in their designation have requirements different from those of similar grades not containing the letter H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements. The tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified. [......]
Boiler tubes need to withstand high pressure and temperature. Sunny Steel’s state-of-the-art manufacturing processes and advanced inspection and testing procedures ensure our boiler tube stand up to the harsh environments.[......]