Applies to seamless steel tubes with circular section of non-alloy quality steel. These tubes are provided for general pressure purposes including transporting of pressurized fluids. There are standards and rules permitting the use of these tubes up to a temperature of 350 0C (see annex A). The terms "tube" and "pipe" are synonymous terms. For general technical delivery conditions see ISO 404.


ISO 9329-1:1989

Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed steels with specified room temperature properties