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Flexible Underground Piping Manual FIe_*VV0RKS <br /> BY OPW FUELING CONTAINMENT SYSTEMS <br /> 0.75=18"radius packaging until ready to use. <br /> 1.0"= 18"radius • Keep all thread protectors secure until ready to use. <br /> 1.5"=24"radius <br /> 2.0"—36"radius • Keep all coupling protector caps/covers in place. <br /> 3.0"=72"radius . DO NOT drag,cut or scrape pipe. <br /> 23.2.6 Fluid Flow Efficiency . Upon completion of pipe,inspect for cuts,scrapes and <br /> Both the primary inner and secondary outer pipe shall have damage prior to close of pipe runs. <br /> an interior surface which is a smooth(non-corrugated)profile • DO NOT exceed 15°angle entry for pipe into a sump. <br /> and be made of a low friction resistant material for improved Please visit our website,www.opwglobal.com,for a detailed <br /> fluid flow efficiency. <br /> guide specification. <br /> 23.2.7 Operating Pressures&Vacuums <br /> The flexible underground piping shall have a minimum five <br /> to one(5:1)safety factor from maximum operating pressure <br /> for rated pressure.The maximum operating pressure rating <br /> for 1.5"diameter piping shall be 100 psi primary and 10 psi <br /> secondary.3/4", 1",2"and 3"piping shall be rated at a maxi- <br /> mum operating pressure of 75 psi primary and 10 psi second- <br /> ary.For suction systems the pipe shall be capable of with- <br /> standing 29"mercury vacuum. <br /> 23.2.8 Pipe Expansion <br /> The primary supply pipe shall not expand more than.0025% <br /> in diameter and overall length when pressurized to 60 psi to <br /> permit accurate pressure decay readings by an in-Eine leak <br /> detector. <br /> 23.2.9 Interstitial Interconnection <br /> All primary and secondary piping shall be connected in such <br /> a way as to permit integrity testing both during installation <br /> and at periodic intervals in the future.Both primary and sec- <br /> ondary piping shall remain continuous during operation. <br /> 23.2.10 ULI Testing <br /> Flexible piping and it's associated fittings shall be inde- <br /> pendently tested in accordance with UL 971. <br /> 24.0 Storage and Handling <br /> 24.1 Storage <br /> OPW-FCS requires that all piping,fittings and system <br /> components be stored in such a manner that they will not be <br /> subject to direct sunlight and/or excessive environmental <br /> conditions.Please review the below noted warnings during <br /> product storage. <br /> • Cover all products with UV protective tarps if outside. <br /> • If tarps are unavailable,store in trailer or building until <br /> use. <br /> 24.2 Handling <br /> OPW-FCS requires that the piping,fittings and system com- <br /> ponents are handled in such a manner that it will not cause <br /> unnecessary damage to the system components. <br /> Please review the below noted warnings during product han- <br /> dling_ <br /> • Do not drop,cut or impact the components. <br /> • Keep all piping,fittings and components in the original <br />