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4.0 Piping Applications 9.0 Assembly of FlexWorks Piping System FlexWorks flexible piping may be used in the following applica- FlexWorks piping must be installed with OPW-FCS tools and fit- tions. tings.These include an OPW-FCS coupling machine fitted with the appropriate size swage kit,bull nose plugs,a pipe cutter tool and Pressure System Supply Piping jacket cutter/swivel wrenches for the appropriate size pipe.Failure to use OPW-FCS tools and fittings may cause damage or failure of Suction System Supply Piping the system and void product warranty. Tank Vent Piping 9.1 Pipe Burial Requirements FlexWorks piping,and Access piping are strong,yet flexible,piping Stage II Vapor Recovery Piping systems and must be buried in such a manner so that they will not Remote Fill Lines compress.Be sure that proper pipe trenching,backfill materials and burial depth requirements are followed and in place prior to measur- WARNING:FlexWorks piping is not warranted for above ing and cutting FlexWorks piping and Access piping.Refer to the ground transmission of flammable liquids due to the possible Flexible Piping Manual for complete instructions and warranty com- exposure to fire. pliance. 5.0 Operating Pressures&Vacuums Note:FlexWorks piping is intended for installation in normal FlexWorks piping and its associated fitting systems have a minimum soil applications. five to one(5:1)safety factor from maximum rated operating pres- CAUTION: Use extra caution when backfilling piping in trench- sure for the primary pipe.The product fluids transferred should not es or open excavations so as not to damage or crush the pip- exceed the maximum operating pressures indicated on each pipe ing or any associated fittings.Avoid sudden impacts from size.For suction systems the pipe is capable of withstanding 29" dumping backfill materials.Spread backfill gradually and even- mercury vacuum. ly. Failure to do so could cause immediate or long-term dam- 6.0 Operating Temperatures age to the piping. CAUTION:FlexWorks and Access piping can be punctured by FlexWorks pipe is for underground use only and a maximum operat- grade stakes or other sharp objects driven into the ground. ing temperature of 125°F(521C). The use of tracer tape or a schematic of the underground pip- 7.0 Allowable Bend Radius ing should always be kept onsite and marked off prior to com- FlexWorks piping is a semi-flexible pipe and should never be bent at mencing any work that may damage the pipe. a radius of less than the designed bend radius.If a section of pipe NOTICE: Installation instructions for containment sumps are becomes kinked,the kinked section should be cut-out of a piping not contained within this FlexWorks Piping instructions. Refer length and it should be discarded and never used.NOTICE: For to the dedicated product manuals for the correct installation cold weather conditions(below freezing)refer to the Flexible procedures and techniques for the containment sumps and Piping Manual for important installation tips. flexible entry boots. 9.2 Installing Pipe Adapters All FlexWorks fittings have proprietary threads and cannot be di- Pipe Diameter Min Bend Radius rectly connected to standard National Pipe Thread(NPT)pipe fittings without an OPW-FCS adapter.After all plumbing assemblies 3/4", 1" 18" have been fabricated and installed inside the tank and dispenser 1-1/2" 24" sumps,install the appropriate OPW-FCS pipe adapter(Swivel Adapter or Fitting)into NPT threaded pipefitting.This is done with 2" 36" standard pipefitting tools,but caution should be taken not to dam- age the OPW-FCS threads or 0-ring surfaces. 3" 72" NOTICE: For NPT threads,use only UL classified thread seal- ant specifically formulated for gasoline and petroleum prod- ucts.Do not over-tighten fittings for it could cause damage to the tapered threads. 8.0 Storage,Transit&Handling CAUTION: Cutting the steel riser pipes and plumbing assem- OPW-FCS requires that all piping,fittings and system components blies too long or too short could cause significant stress on be stored in such a manner that they will not be subject to direct the FlexWorks pipe and coupling that could ultimately cause sunlight and/or excessive environmental conditions. OPW-FCS failure.The FlexWorks fittings should always be in direct align- requires that the piping,fittings and system components are han- ment with the flexible entry boot openings and cannot be used dled in such a manner that it will not cause any unnecessary dam- in lieu of a flex connector. age.Do not drop,cut or cause severe impact to any of the compo- NOTE: It is important to select the correct size and type pipe nents.Keep all piping,fittings and other components in the original entry boot to be used for a specific application and pipe size. packaging until ready for use.Keep all coupling protector caps/ Refer to the OPW-FCS Flexible Entry Boot Manual of detailed covers on couplings and fittings until assembly. Inspect all fittings information for installing these entry seals. prior to installing.Parts that have been cut,cracked or otherwise misused should be replaced.Do not drive over,drag or damage 9.3 Installing Access Piping FlexWorks Piping. Any damaged or compromised section of pipe Access Piping is a large diameter corrugated flexible piping that should be discarded and not be used. adds additional protection to FlexWorks piping and allows the pipe NOTICE: Never use knives or razor blades to open packaging to be removed and replaced without the need for excavation.Meas- as damage to piping could occur. uring and cutting Access Pipe should be done prior to measuring