2012DL/T 869-2012 The code of welding for power plant
2004DL/T 869-2004 The code of welding for power plant
1970DL 5007-1992 Code for design of erection and acceptance for power plant construction (welding section)
DL 5007-1992 Code for design of erection and acceptance for power plant construction (welding section) was changed to DL/T 869-2004 The code of welding for power plant.