IGEM/SR/15 Edition 5 +A: 2015 - Integrity of safety-related systems in the gas industry - Digital (3 year)
IGEM/GM/PRS/33 - Meter regulators of nominal diameter 32 mm and not exceeding 150 mm and for inlet pressures not exceeding 75 mb - Hard copy
IGEM/GM/PRS/40 - Medium pressure meter installation kits for flow rates not exceeding 6 m3 h-1 - Hard copy