Empty weight 1 : In relation to a cylinder, means the weight of the cylinder complete with its valve and any other fittings or appurtenances that are normally on the cylinder when it is being filled
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}