This European Standard specifies the minimum requirements for the design@ construction and testing during manufacture of transportable refillable welded steel Liquefied Petroleum Gas (LPG) cylinders@ of water capacity from 0@5 l up to and including 150 l. This European Standard applies only to cylinders having a circular cross-section. Cylinders designed and constructed to the requirements of this European Standard may be overmoulded; additional requirements for these cylinders are set out in Annex B.