DZ/T 0058-1993 (English Version) PDF

Scope: This standard specifies the technical requirements, acceptance conditions, service life, and load test methods for tongs used in geological core drilling. This standard is applicable to the manual unscrewing and unscrewing of various pipe threads for geological core drilling specified in the DZ 1.1 ~ 1.3-84 "Pipe Threads for Geological Core Drilling" standard. According to the purpose, this standard is divided into two series: double-tube diamond, carbide, and steel core drilling tongs and rope coring diamond core drilling tongs; according to the pipes they are screwed, it is divided into articulated drill pipe tongs, inner pipe tongs, and outer pipe tongs. Pipe wrench, a total of two series, 27 specifications.

DZ/T 0058-1993 history