ASTM A213 T91 and ASTM A335 P91 alloy steel pipe
Grade T91 specified in ASTM A213 is used for the manufacture of ferritic and austenitic boiler superheater and heat exchanger seamless steel pipes, while grade P91 specified in ASTM A335 is used for ferritic and alloy seamless steel pipes for high temperature applications. .
What material is the T91 tube made of?
The chemical composition of SA 213 T91 tubes includes chromium, carbon, manganese, nickel, silicon molybdenum, nitrogen and some other trace elements.
What are the standard specifications for ASTM A213 pipes?
ASTM A213 pipe sizes and thicknesses generally supplied in accordance with this specification are 1⁄8 in. [3.2 mm] inside diameter to 5 in. [127 mm] outside diameter, and 0.015 to 0.500 in. [0.4 to 12.7 mm] (inclusive), minimum wall thickness , or average wall thickness if specified on order.
ASTM A213 Gr T91 steel pipe has excellent high temperature performance, oxidation resistance and corrosion resistance. It is suitable for heating surface pipes of low and medium pressure boilers (working pressure is generally not greater than 5.88Mpa, working temperature is below 450℃), as well as high pressure boilers ( The working pressure is generally above 9.8Mpa and the working temperature is between 450℃ and 650℃) heating surface pipes, economizers, superheaters, reheaters and petrochemical industry pipes, etc.
