BS ISO 18132-3 pdf download Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — General requirements for automatic tank gauges Part 3: Automatic tank gauges for liquefied petroleum and chemical gases on board marine carriers and floating storage 1 Scope This part of lSO 18132 establishes general principles for the accuracy, installation, calibration and verificationof automatic tank gauges (ATGs) used...