... heat exchangers, super heaters, condensers, and catalytic tubes, refining furnaces etc. 1 General usage pipeProduct Description ... , heat exchangers, super heaters, condensers, and catalytic tubes, refining furnaces etc. Standards: ASTM/ ASME A213/ ... for further confirmation.3 Hydraulic tubeProduct Description: Hydraulic system, Mechanism in automation, fuel tubes for aircrafts, instrumentation ...