ISO 161-1:1978 http://www.iso.org ISO standards and projects ISO - International Organization for Standardization 240 http://www.iso.org/iso/logo_iso.gif http://www.iso.org ISO 161-1:1978 ISO 161-1:1978 - Thermoplastics pipes for the transport of fluids -- Nominal outside diameters and nominal pressures -- Part 1: Metric series This document reached stage 95.99 on 1996-12-26 , TC/SC: ISO/TC 138, ICS: 23.040.20 Withdrawn standards