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2.1.4 FlexWorks Single A single wall flexible supply pipe is designed for direct burial applications or installed within the Access piping for future replacement capabilities. The piping has a smooth inner bore, enhancing fluid flow efficiency which provides an excellent sealing surface for the couplings. 2.1.5 FlexWorks Double A double wall flexible supply pipe is designed for direct burial applications or installed within the Access piping. The outer containment jacket includes inner stand-off ribs to create a small interstitial space which allows for optimum fluid migration, continuous monitoring and easy periodic testing. 2.2 Access Pipe Access Pipe is a large diameter corrugated flexible piping that adds additional protection to OPW-FCS's flexible piping and allows the pipeto be removed and replaced without excavation. Made of high density polyethylene, this corrugated tube is strong enough to withstand H-20 loading requirements when properly buried and thick enough to minimize damage from shipping and jobsite handling. Access Pipe can accommodate the 3/4 ", 1", 1-1/2", 2" and 3" Flex supply pipe. 3.0 FLEX PIPING CONNECTIONS OPW-FCS offers three types of piping connection systems for use with their flexible piping systems. These three different piping connections can accommodate a wide variety of piping designs, layouts and installation applications. Coax Couplings & Fittings These piping connections are made of a combination of glass reinforced plastic and stainless steel featuring a double wall n Flo,'IeWURKS By 09W FUELING CONTAINMENT SYSTEMS design. Coax fittings require the use of the Flex Coupling Machine to install the pipe couplings. Swivel Couplings & Fittings These piping connections are made of stainless and protected steel featuring a swivel nut connection with a Viton gasket seal. Swivel fittings require the use of the Flex Coupling Machine to install the pipe couplings. 3.1 Coax Couplings & Fittings Coax couplings & fittings are a double wall design and are used to interconnect FlexWorks piping. These UL® listed composite couplings and fittings permit the entire flexible piping system, including riser pipes to be secondarily contained, tested and monitored. The coax couplings & fittings are available in 1-1/2" and 2" sizes. 3.1.1 Coax Pipe Couplings These couplings provide a means of connection from OPW-FCS's flexible piping to coax fittings and adapters. Coaxial pipe couplings attach to a flexible" pipe section using the OPW-FCS Coupling Machine. Each coupling assembly includes a stainless steel insert with two O -rings, ferrule with one O-ring, and a swivel nut. Available for both single wall and double wall applications. NOTE: Coax couplings require a different face plate to be used with OPW-FCS's coupling machine than is used with the swivel couplings. 3.1.2 Coax Pipe Adapters These adapters are designed to connect one end of a flexible pipe section fitted with a coax pipe coupling to a 2" NPT threaded female coupling or fitting.The adapter has a 1/4" threaded test port for future installation of coax test tube for testing the interstitial space of the double wall piping. Air Fitting Shear Valves\ /Shear Valves a� Coax Til,�a �I Shear Valve , e Steel Riser _.._.... Pipes.. ... Adapter+...] ..._. _.. 1..._.3 .. _.... _ _. Riser Jacket Test Tube- Coax \ Riser Pipe Adapter I Riser Coax Male (CRA -1515) ; Jacket Coax AdapterCoax Pipe Connector (CRA -2020) Shear Valve (CPA -1520) (CRA -2015) \ Adapter Kit 7 \er oax (CCC -1515) Coax Pipe Tee Riser Kit (CPA -2020) ipe C Coupling Fittings (CPC 1502) ''' (CTF 1515) (CPC 2002) (CTF 2020) Co ..' ax so -----Elbow - Fitting CPC 1502(CEF-1515) CPC -2002 FlexWorks Piping (CEF-2020)