... , mechanical structure, water wall panel, economizer, super heater, boiler and heat exchanger with seamless steel tubes, and to transport ... Tubes ASTM A192: Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service ASTM A333: Standard Specification ... Carbon Steel Pipes for Pressure Service BS 3059: Steel Boiler and Superheater Tubes DIN 1629: Seamless Circular Tubes of ...