Over deze norm
||Gas- en oliewinning en -productie
Is to provide the minimum acceptable requirements for subsurface safety valve (SSSV) equipment. Covers subsurface safety valves, safety valve locks, safety valve landing nipples, and all components that establish tolerances and/or clearances which may affect performance or interhcangeability of the SSSV equipment. Safety valve locks, safety valve landing nipples and SSSVs manufactured by different facililties or manufacturers may be supplied as separate items.