DIN 4815-5:2011 液化石油气用橡胶软管和塑料软管.第5部分:用于从管道系统中抽出液化石油气的软组件用安全联轴器和联轴器.安全要求,检验和标识
Rubber and plastic hoses for liquefied petroleum gas - Part 5: Safety couplings and couplings for hose assemblies to withdraw liquefied petroleum gas out of pipeline systems - Safety requirements, testing and marking