NF E29-042-4:2021 Flanges and their joints - Bolting - Part 4 : selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU
2021NF E29-042-4:2021 Flanges and their joints - Bolting - Part 4 : selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU
2010NF E29-042-4:2010 Flanges and their joints - Bolting - Part 4 : selection of bolting for equipment subject to the Pressure Equipment Directive 97/23/EC.