This Gulf standard concerns pin-index yoke-type valve connections for small medical gas cylinders, with a maximum working pressure (filling pressure at 15oC) of 200 bar it specifies. – basic dimensions, – requirements for alternative designs of the yoke-type valve connections. – dimensions and positions for the holes and pins for the outlet connections. It also specifies the dimensions and positions for the holes and pins for the outlet connections for the gases and gas mixtures given in table 1. This Gulf standard applies to small medical gas cylinders used for patient care, including therapeutic diagnostic and prophylactic applications, in hospital sand for emergency treatment.