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ULC 631 PDF
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Standard for Isolating Bushings For Steel Underground Tanks Protected with External Corrosion Protection Systems (ULC S631)
standard by Underwriters Laboratories of Canada, 09/01/2004
ULC 631 – Standard for Isolating Bushings For Steel Underground Tanks Protected with External Corrosion Protection Systems (ULC S631)
Covers the requirements for low profile nylon isolating bushings with internal and external threads and component thread sealant which are intended for use in the external corrosion protection of underground steel tanks which have been installed in accordance with requirements contained in the Standard for External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids, CAN/ULC-S603.1.
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