This standard specifies the basic dimensions, mechanical properties, test methods, inspection rules, marking, packaging and storage of flat type connector units for mining round link chain (hereinafter referred to as the connector units) with the nominal diameter of 14, 18, 22, 24, 26, 30, 34, 38, 42mm.
This standard is applicable to the connector units used in the underground scraper conveyor, reversed loader and coal plough in coal mines, which are used, either horizontally or vertically, to connect mining round link chain specified in GB/T 12718.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB/T 2828-87 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
GB/T 10111-88 Methods for random sampling by utilizing dices of random number
GB/T 12718-91 High-tensile steel chains (round link) for mining
MT/T 463-1995 Flat type connector units for mining round link chain — Inspection specifications
3 Specifications and dimensions
3.1 See Figure 1 and Table 1 for the specifications and main dimensions of connector units.
