This standard specifies the use conditions, technical requirements, test methods, inspection rules, marking, packaging and storage requirements for high-temperature air duct quick-release clamps (hereinafter referred to as clamps). This standard applies to the manufacturing, testing and acceptance of quick-release clamps for air system duct connection.
HB 7648-2004 history
2004HB 7648-2004 Specification for Clamp connecting conduit in air system
1999HB 7648-1999 General specification for quick release clamps for high temperature air duct connections
1970HB 6536-1991 High temperature conduit connection quick release clamp technical conditions