ISO 65:1981

Carbon steel tubes suitable for screwing in accordance with ISO 7-1

This second edition cancals and replaces the first edition (1973). Establishes the dimensions and charakteristics of seamless and welded steel tubes for separate series as follows: heavy series, medium series, ligth series 1. ligth series 2. Tabulates dimensions for DN 6 up to and including DN 150 as well as tolerances on the outside diameter.