2007DL/T 5017-2007 Specincation for manufacture installation and acceptance of steel penstocks in hydroelectric and hydraulic engineering
1993DL 5017-1993 Specifications for manufacture,installation and acceptance of steel penstocks
DL 5017-1993 Specifications for manufacture,installation and acceptance of steel penstocks was changed to DL/T 5017-2007 Specincation for manufacture installation and acceptance of steel penstocks in hydroelectric and hydraulic engineering.