NF P52-306-1:1993 DTU 65.20 - Thermal insulation of circuits, appliances and accessories - Working temperature greater than ambient temperature - Part 1 : technical specifications.
2006NF P75-402-1-1:2006 Assembly work - Thermal insulation of circuits, appliances and accessories from -80 oC to +650 oC - Part 1-1 : contract bill of technical clauses.
1993NF P52-306-1:1993 DTU 65.20 - Thermal insulation of circuits, appliances and accessories - Working temperature greater than ambient temperature - Part 1 : technical specifications.