This Prestandard is applicable to pipelines for the transmission of processed, non-toxic and non-corrosive natural gas according to ISO 13686 in onland gas supply systems, where ¿the pipeline elements are made of unalloyed or low-alloyed carbon steel, ¿the pipeline elements are joined by welds, flanges or mechanical couplings, ¿the pipeline is not located within commercial or industrial premises as an integral part of the industrial process on these premises except for any pipelines and facilities supplying such premises. This Prestandard applies both to new and existing pipelines and covers pipelines which begin after the gas producer's metering station and ends at the boundary of the delivery station on the premises of the customer. Installations like Under Ground Storage, Compressor stations and LNG plants are excluded from this scope.