notice inviting tender for procurement of glass riser with cap for pre-bleacher column c 102 of cna plant , supply material at rcf trombay unit , fabrication , packing and supply of glass riser ( monolithic ) with cap for pre-bleacher column c 102 of concentrated nitric acid plant as per the following specifications: a ) specifications: 1 ) size: dn 200 . 2 ) rcf ref drg . no . : 451-m-182 b ) operating conditions: 1 ) pressure: vacuum -800 mmwc to + 2 . 5 kg / cm2 2 ) tempratrue: 200 deg c 3 ) fluid service: distilaition ( sulphuric acid 98 . 5% and nitric acid 40%-98% ) c ) material of construction: 1 ) glass: borosilicate 3 . 3 as per iso 3585 & en 1595 or equivalaent code d ) applicable codes: iso 15695 , 3585 other equivlanet code with rcf approval e ) inspection and testing: - by rcf 1 ) material shall be tested for chemical composition and mechanical / physicla and thermal properties 2 ) vendor shall maintain uniform thickness and arrange for the thickness testing