: An earlier national standard that remains relevant for defining service life parameters and hydrostatic strength.
Виды полипропиленовых труб: характеристики и ... - valtec.ru gost na polipropilenovye truby
: A code of rules for internal water supply and sewerage that sets the standard service life for PP-R pipes at 50 years for cold water. 2. Classification of Materials : An earlier national standard that remains relevant