Gr.T91 / UNS K90901 Alloy Tubes

ASTM A213 (ASME SA213) and ASME A/SA335 tubing and pipe had been widely used in high temperature services especially for the boiler and 

superheater. Tube material could be in alloy steel and manufactured in seamless of hot rolled or cold drawn. so this pipe usually used in very 

important places and the price is much higher than normal carbon pipes. 

Common grades are T5, T9, T11, T12, T21, T22, T91, T92, etc                  

Applications:

        The exceptional high-temperature strength and creep resistance of ASTM A213 T91 Tubes make them the material of choice for the most 

        demanding thermal applications:

1) Boiler Tubes: ASTM A213 T91 Boiler Tubes are used in critical components like waterwalls, superheaters, and reheaters in ultra-supercritical (USC) 

                      and advanced ultra-supercritical (A-USC) power boilers.

2) T91 Superheater & Reheater Tubes: For the highest temperature sections of modern power plants.

3)  Main Steam Lines & Header Piping: Carrying high-pressure steam to turbines.

4) Heat Recovery Steam Generators (HRSGs): In combined cycle power plants.

5) Petrochemical & Refinery Heaters: For severe fired heater tube applications.

6) Advanced Power Generation: Critical for coal-fired USC plants and gas-fired combined cycles.

7) Chemical Processing: For equipment under high thermal and mechanical stress.