This Standard covers the standardization of dimen-sions of welded and seamless wrought steel pipe for high or low temperatures and pressures.
The word pipe is used as distinguished from tube to apply to tubular products of dimensions commonly used for pipeline and piping systems. Pipe NPS 12 (DN 300) and smaller have outside diameters numeri-cally larger than their cormesponding sizes. In conrasL,the outside diameters of tubes are numerically identical to the size number for all sizes,
