This standard specifies classes and types, components, materials and construction, requirements, mark and label, sampling and criteria for conformity, and tests for LPG pressure regulators operated in a single- or two-stage regulation having a nominal outlet pressure not over 5.0 kPa* and a capacity not over 4 kg of gas per hour at a temperature of 30±5°C. Note. * 1 kPa equals approximately 10 mbar or approximately 100 mm water.