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standardization of cylinder valve outlet connections is important to ensure product safety and integrity. the cylinder valve outlet standards separate gases based upon pressures and chemical properties encountered, e.g., flammable, oxidizing, corrosive, toxic, and pyrophoric. standardization of cylinder
valve outlet connections also permits the use of multiple suppliers by an end-use customer without special fittings, adapters or jigs. based on historical influences different regions of the world have established their own standards, e.g., british standard (bs), german standard (din), japanese standard...
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