This document specifies the procedures to be adopted when checking transportable refillable LPG cylinders before, during and after filling.This document is applicable to transportable refillable LPG cylinders of water capacity not exceeding 150l and deemed to be fitted with valves designed according to ENISO14245 [4] and ENISO15995 [5].This document does not apply to the requirements for filling LPG cylinders that are designed and equipped for filling by the user.This document does not apply to the requirements for filling LPG containers on vehicles.This document is applicable to the following: welded and brazed steel LPG cylinders with a specified minimum wall thickness (see EN1442 and EN12807 [ 1] or an equivalent standard); welded steel LPG cylinders without specified minimum wall thickness (see EN14140 or an equivalent standard); welded aluminium LPG cylinders (see EN13110 [ 2] or an equivalent standard); composite LPG cylinders (see EN14427 or an equivalent standard); and over-moulded cylinders (OMC). Specific requirements for the different types of cylinders are detailed in AnnexA, AnnexB, AnnexC, AnnexD and AnnexG.This document is intended to be applicable to cylinders complying with RID/ADR [6] [7] (including pi marked cylinders) and also to existing non RID/ADR cylinder populations.