Bis Standards For Double Acting Spring Hinges There is a standard for double acting spring hinges made by The Bureau of Indian Standards (BIS) IS 453:1993, which is a mechanical devices that allow door movement for swing in two directions and provide automatic return to center position. This specification covers the material, the design and the performance of hinges used in architectural applications to provide the durability and the functional performance necessary in these applications. According to the IS 453:1993 typification, producers of Double Action Spring Hinges must then have a BIS certification before the possibility of retail. This certification promotes consistent potency and supports product safety and efficacy by conforming to national standards. Items that conform to this standard would come with ISI Mark, symbolising a quality adhering to Indian standards for both product users and professionals.