NF A49-230:1985 Steel tubes. Plain end seamless tubes for pressure vessels and piping systems used at low temperatures. Dimensions. Technical delivery conditions.
2014NF A49-200-4*NF EN 10216-4:2014 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4 : non-alloy and alloy steel tubes with specified low temperature properties
0000 NF A49-200-4:2002
1985NF A49-230:1985 Steel tubes. Plain end seamless tubes for pressure vessels and piping systems used at low temperatures. Dimensions. Technical delivery conditions.