1.1 This specification 2 covers seamless and welded blackand hot-dipped galvanized steel pipe in NPS1 ⁄ 8 to NPS 26 [DN6 to DN 650] (Note 1), inclusive, with nominal wall thickness(Note 2) as given in Table X2.2 and Table X2.3. It shall bepermissible to furnish pipe having other dimensions providedthat such pipe complies with all other requirements of thisspecification. Supplementary requirements of an optional na-ture are provided and shall apply only when specified by thepurchaser.
