Pipes, tubes and hoses, and fittings therefor, including valves, of metal.

Pigs for cleaning pipes; joints for pipes (metal -) [parts of machines]; valves; valves (clack -) [parts of machines]; valves [parts of machines]; actuators for valves; hydraulic valves; hydraulic valve actuators; pneumatic valve actuators; valves operated automatically by hydraulic control; valves operated automatically by pneumatic control; regulators [parts of machines]; sludge cocks [valves] being parts of machines; valves [mechanical] for regulating fluid flow; valves operated by changes in pressure; pumps [machines]; pneumatic control systems for pigs for cleaning pipes.