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126.96.36.199 Materials of Construction for Valves
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Valves installed externally to the tank shall be permitted to be other than steel or ductile iron if the material of construction has a ductility and melting point comparable to steel or ductile iron and is capable of withstanding the stresses and temperatures involved in fire exposure or the valves are otherwise protected from fire exposures, such as by materials having a fire resistance rating of not less than 2 hours. [30:188.8.131.52]
Cast iron, brass, copper, aluminum, malleable iron, and similar materials shall be permitted to be used on tanks described in 184.108.40.206.1.1 or on tanks storing Class IIIB liquids where the tanks are located outdoors and not within a diked area or drainage path of a tank storing a Class I, Class II, or Class IIIA liquid. [30:220.127.116.11]
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