Interpretation of Specification of Seamless Steel Tube for Wire-line Core Drill Pipe

Introduced in the paper is the renewal of the Chinese specification of seamless steel tube for wire-line core drill pipe, and interpreted is relevant technical requirements specified in Specification GB/T 9808-2008 《Seamless Steel Tubes for Drilling》 as having been effected since May 1, 2009. According to the newly-established special requirements for the wire-line core drill pipe by the geological prospecting industry, and taking actual levels of the domestic steelmaking technology and pipe-making technology, certain technical parameters more stringent than those specified in the applicable specification are proposed.