NF M87-245-3*NF EN 14870-3:2006 Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 3 : flanges.
2006NF M87-245-3*NF EN 14870-3:2006 Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 3 : flanges.