Manually operated ball valves and closed bottom taper plug valves for gas installations for buildingsWhat is BS EN 331 Ball valves and closed bottom taper plug valves about? BS EN 331 describes ball valves and closed bottom taper plug valves, their construction, performance, and safety. BS EN 331 provides a detailed explanation of the testing requirements and marking rules. It is the best industrial guidance available. BS EN 331 applies to metallic valves not directly buried for domestic and commercial installations inside or outside of buildings,

detecting or injecting current

BS 6336 will ensure in the interests of public safety that no one will misrepresent facts about fire tests or use their results in such a way as to give a false impression of fire safety

this type is provided with positions for sensing elements only so that when connected to a central alarm system the requirements of 5

BS EN 4611-007 specifies characteristics of nickel-plated conductor electrical cables (XLETFE) and provides essential guidance on using the electrical systems of aircraft

test modes and rates (load rate or displacement rate)

interfaces and testing including pass/fail criteria for draw gear and screw coupling

(previously ISO 13959)

fire protection agencies

in order to demonstrate their equivalence

It provides designers

Weldability testing for steels of groups 2 and 3 and mechanical testing of butt welds

validation and routine monitoring and overall control of sterilization processes