Descriptors | Safety valves, Hydraulic tests, Springs, Installation, Pipework systems, Pressure testing, Grey cast-iron, Flow, Helical springs, Volume, Mathematical calculations, Safety devices, Performance testing, Thermodynamic properties, Steam heaters, Boilers, Steels, Marking, Pressure equipment, Flow measurement, Steam boilers, Flow rates, Hot-water boilers, Valves, Copper alloys, Design, Type testing, Relief valves |