2018DL/T 612-2017 Regulations on Safety Supervision of Boilers and Pressure Vessels in Electric Power Industry
1997DL 612-1996 Supervision code for boiler and pressure vessel of the power industry
DL 612-1996 Supervision code for boiler and pressure vessel of the power industry was changed to DL/T 612-2017 Regulations on Safety Supervision of Boilers and Pressure Vessels in Electric Power Industry.