Keywords:
Approval testing, Check valves, Compressed gas equipment, Compressed gases, Construction requirements, Definitions, Design, Design certifications, Gas cylinder valves, Gas cylinders, Gas holders, Gas valves, Gases, Leak tests, Life (durability), Liquefied gases, Marking, Mechanical properties, Performance requirements, Performance testing, Pressure valves, Pressure vessels, Qualification tests, Residual gases, Residual pressures, Residue, Resistance, Specification (approval), Strength of materials, Testing, Valve for steel cylinders, Valves, Visual inspection (testing)