American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2005. Published October 2005. Originally approved in 1931. Last previous edition approved in 2001 as A 134 – 96 (2001). 4 p. This specification covers electric-fusion (arc)-welded straight seam or spiral seam steel pipe NPS 16 and over in diameter (inside or outside as specified by purchaser), with wall thicknesses up to 3⁄4 in. (19.0 mm), inclusive. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.