This European Standard specifies safety requirements, safety factors, test methods, test pressures and marking ofliquid level indicating devices, referred to throughoutThis standard as "level indicators", for use in refrigeratingsystems and heat pumps.It applies to devices connected to refrigerant vessels (e.g. on high-pressure liquid receivers, intercoolers and low-pressure separators) and to devices connected to other parts of a refrigerating system (e.g. oil-level sight glasseson a compressor).This European Standard applies to those types of level indicators that are direct and indirect reading devices (e.gsight glasses, frosting tubes), and includes electrical and pneumatic indicators.This European Standard describesThe procedure to be followed when designing (by calculation or by anexperimental design method) level indicator parts subjected to pressure as well asThe criteria to be used forTheselection of materials.This European Standard applies toThe design of level indicators with respect to pressuredescribes methods by whichThe reduced impact values at lower temperatures may be taken intomanner.containment andaccount in a safe
EN 12178:2003 history
2016EN 12178:2016 Refrigerating systems and heat pumps - Liquid level indicating devices - Requirements@ testing and marking
2003EN 12178:2003 Refrigerating systems and heat pumps - Liquid level indicating devices - Requirements, testing and marking