This standard specifies the requirements for Class T lifting chains. This lifting chain is precisely calibrated for use as a load-bearing chain on hoists and similar equipment. The chain is composed of a short ring chain made of electric welded round steel. It has been fully heat treated and tested and complies with the regulations of JB/T 8108.1. The chain size range covered by this standard is 4 to 20mm. Appendix A (the appendix of the standard) gives a temporary additional size range of 6 to 19mm.
JB/T 8108.2-1999 history
1999JB/T 8108.2-1999 Short link chain for lifting purposes.Grade T(8),calibrated,for chain hoists and other lifting appliances