This document specifies the requirements for material, design, manufacture, testing, marking and documentation of stainless steel pliable corrugated gas tubing kits for gas installation pipework with a maximum allowable pressure (PS): less than or equal to 0,5 bar within a nominal size range from DN 10 to DN 50 (class 1); and less than or equal to 2 bar within a nominal size range from DN 10 to DN 25 (class 2). This document applies to stainless steel pliable corrugated gas tubing kits used for 1st, 2nd and 3rd family gases (see EN 437) in residential, commercial and industrial gas installations to be installed outdoors or indoors at a temperature range from 20 °C to + 60 °C. This document does not apply to: pliable tubing without cover; corrugated safety metal hose assemblies for connection to moveable appliances NOTE This document does not cover the installation aspects of stainless steel pliable corrugated gas tubing kits.