DZ 2.1-1987
Geological Drilling Diamond Bits (English Version)
- Standard No.
- DZ 2.1-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Geology
- Status
- 2015-07
- Replace By
- DZ/T 0277-2015
- Latest
- DZ/T 0277-2015
- Scope
- This standard applies to geological drilling diamond heads in GB 3423-82 "Seamless Steel Pipes for Diamond Core Drilling" and large-diameter engineering diamond drill bits in YB 235-70 "Steel Pipes for Geological Drilling", but does not include petroleum diamond drill bits and thin Wall engineering diamond drill bits.
DZ 2.1-1987 history
- 2015 DZ/T 0277-2015 Diamond bits for geological core drilling
- 1970 DZ 2.1-1987 Geological Drilling Diamond Bits
DZ 2.1-1987 Geological Drilling Diamond Bits was changed to DZ/T 0277-2015 Diamond bits for geological core drilling.
