The ASTM International specifications for steel tubes list standard requirements for boiler and super heater tubes, general service tubes, steel tubes in refinery service, heat exchanger and condenser tubes, mechanical and structural tube.Seamless Carbon Steel Pipe for High-Temperature
ASTM A106-APP Carbon Grade Chart v6.pdf
ASTM-A519-Tubing-Quick-Guide-Carbon-and-Alloy-Tubing.pdf