Your Single HDPE Source Structures - ISCO Industries

1 Coming Structures > Manholes> KO Pots> Sumps> Tanks> Valve Boxes > Pump StationsYour Single Industries produces polyethylene manholes, themost trouble-free manholes for a long service is tough! It canbend and flex with variousloading conditions. Thistoughness means fewerpotential leaks and longer polyethylene man-holes are easy to pieces of equipmentcan be used to position thesemanholes. Inlets and outletsare correctly positioned dur-ing the manufacturingprocess. These inlets andoutlets are factory weldedinto place to be offers a widerange of chemical resistance to acids, bases, and many organic compounds. Because of thisresistance, attack from hydrogen sulfide, sulfuric acid and other aggressive chemicals doesnot , impact-resistantlLightweight, easy to installlChemically resistant, no corrosionlExcellent flow, nonporous surface, no builduplSizes from 24 to 120 standardlVariety of options and configurationsThis document reports accurate and reliable information to the best of our knowledge.

2 Suggestions and recommendations cannotbe guaranteed because the conditions of use are beyond our control. The user of this product assumes all risk connected with theuse thereof. ISCO Industries , LLC assumes no responsibility for the use of information presented herein and hereby expresslydisclaim all liability in regard to such of ContentsApplicationsSanitary Systems ..3 Landfills ..3 Chemical Plants ..4 Remediation Sites ..4 Special Purpose Structures ..5 Valve Boxes ..6 Dual Containment Manholes ..6 InstallationManhole Design and Installation Standards ..7 Vehicular Loads ..7 Unloading ..7 Flotation and Deflection ..7 Pump Mounting ..8 Shop Drawings ..8 Manhole Design FeaturesLadders ..8 Tops and Covers ..8 Inlets, Outlets, & Inverts ..9 Design AssistanceAnchoring ..10 Connections to Manholes ..11 SpecificationsHigh Density Polyethylene Manholes ..12 Manhole InstallationsTypical Installations ..Inside Back Cover APPLICATIONS3 APPLICATIONSB ecause polyethylene manholes provide the highest level of reliability,applications vary from sanitary sewer uses to handling toxic SYSTEMSIn sanitary sewers, hydrogen sulfide is the primary cause of corrosion.

3 Hydrogen sulfide is convertedto sulfuric acid, which attacks concrete and eventually destroys concrete manholes and pipe. Thecorrosion resistance of polyethylene and its toughness make it a natural for manholes. Polyethylenemanholes remain leak-free because there is no chemical attack. The toughness of polyethyleneeliminates the chance of cracking during installation. There is no infiltration of external ground water,reducing the amount of treatment required. There is no exfiltration of sewage to the APPLICATION - Leachate Collection and TransportISCO Industries fabricates manholes and other special purpose HDPE Structures for landfills. HDPE manholes are used as cleanouts and valve boxes. They are also used in place of concrete man-holes in leachate transport chemical resistance of HDPE manholes is very important in landfill applications. Leachateattacks concrete and metal because of its acidic nature. HDPE is virtually inert to most dilute acidsand garbage is added to a landfill, the loads increase and materials shift.

4 The toughness andstrength of HDPE is important. HDPE pipe and manholes are proven in these stringent density polyethylene valve boxAPPLICATIONS4 APPLICATIONSCHEMICAL PLANTSP lants with corrosive chemicals in their under-ground pipes are experiencing the benefits ofcorrosion resistant, high-density polyethylenepipe with flanged manhole connections. As aresult, a very tight system is achieved. ISCOI ndustries manholes are engineered to fit precisely and all joints are welded to pulp and paper industry is a frequent userof HDPE pipes and manholes. The effluent ismost often corrosive and may also be abrasiveas well. Since high density polyethylene pipeand manholes are corrosion and abrasionresistant, they work well for many industrialand chemical manholes can provide a low-point forthe annular space in dual containment pipingsystem. The low point sump can then bemonitored to provide leak detection or to con-tain a float switch or level sensor used as aswitch.

5 Wellhead vaults are another common use of HDPE prefabricated manholes are avail-able from ISCO Industries . Valves, cleanouts,check valves, low-point and other leak detec-tion components are available pre-installed inthe manhole as Constructed withButt Fused Bottom and TopREMEDIATION SITESHDPE manholes have become the standard atmany remediation and clean up sites. Whenhazardous fluids are being transported, thenon-corrosive, leak-free HDPE manholes canbe specified with use for HDPE manholes is valve contain-ment. The manhole prevents small leaks fromescaping into the environment and full accessprovides a maintenance advantage. Oftencleanouts are contained in these Well Head ManholeAPPLICATIONS5 APPLICATIONSSPECIAL PURPOSEHDPE manholes from ISCO Industries serve many specialized purposes. Whatever your applicationrequirements, a custom designed HDPE manhole structure could be the answer. Many hazardousand/or toxic materials-handling problems are solved by using HDPE fabricated picture below shows an HDPE knock-out pot used for condensing moisture from landfill methane is the largest component of landfill gas, moisture must be removed to burn or purifythis gas.

6 The HDPE knock out pot is used to dry the gas before it is burned in landfill flare is also removed for use in state of the art landfill gas recovery Methane Knock- Out PotAPPLICATIONS6 APPLICATIONSVALVE BOXESThe protection of valves and flow measure-ment instrumentation is another excellent useof HDPE manholes. These valve boxes alloweasy access to your valves, flow instrumenta-tion, pressure gauges, sample ports,cleanouts, and other piping system compo-nents. HDPE manholes can be fabricated asunits with all valve and instrumentation compo-nents factory installed to make on site installa-tion fast and easy. Pump stations, wet wellsand well heads are cost effective uses ofHDPE manhole Structures . Since HDPE is avery tough ductile material, it is unaffected bypump vibration when properly installed. Thesestructures can also accommodate various leakdetection 1 Dual Contained Valve Operating ManholeDUAL CONTAINMENT MANHOLESDual Containment manholes provide many additional options for configuration.

7 This bringschallenges for the design engineer. ISCO canhelp you choose the most effective configurationfor your can be used as an extended annularspace providing several leak detection configuration also provides for valve containment. Often the carrier pipe from doublewall piping will continue through the manholeitself. This allows piping system equipment,such as flow control and measurement devices,to be installed in a structure that serves as acontainment p ViewOSHA LadderCarrier WallContainment WallContainment PipeCarrier PipeSample / Pump-OutPortFlange & Backup RingMANHOLES DESIGN AND INSTALLATION STANDARDSISCO Industries recommends that HDPE man-holes be designed and installed in accordancewith ASTM F 1759-97, Standard Practice forDesign of High Density Polyethylene (HDPE)Manholes for Subsurface Applications . Thisstandard addresses the material, structuraldesign requirements of the manhole barrel,floor (or bottom) and standard assumes that the HDPE manholewill be installed in backfill consisting of Class Ior Class II material as defined in ASTM D2321, which has been compacted to a mini-mum of 90% standard proctor density.

8 Thebackfill should extend feet from the perime-ter of the manhole for the full height of themanhole. This extends laterally to undisturbedsoil. Manholes should be placed on a base ofstable soil, a concrete base, or should be 12 inches in depth and have95% standard proctor density. The foundationmaterials must provide adequate bearingstrength for the manhole and downdrag used in landfills and other areaswhich experience soil settlement will requirespecial designs. The designer should preparespecial specifications for these particular LOADSWhen HDPE manholes are installed in roads orareas subject to vehicular traffic, a concretepad which rests on the soil surrounding themanhole is required. The pad should bedesigned to disperse the live load into the 1 shows a concrete with rebar andfoundry slings are used to unload HDPE man-holes from trucks. A fork lift, boom truck orbackhoe can be used. Match the weight andsize of the manhole with the lifting capabilitiesof the equipment.

9 A timber beam can be usedinside the manhole between inlets and outletsfor easy lifting. Lifting lugs can be fabricated onthe manhole when AND DEFLECTIONWhen HDPE manholes are installed in areas with groundwater, floatation must be consid-ered. Depending upon the level of the watertable, the HDPE manhole must be anchored in place. Reinforced concrete collars are usedto prevent flotation. Attachment to the manholeis important. Drawing 4 below, shows a typicalburied HDPE manhole with a lip on the bottomto reduce flotation. The upward lift of the waterdisplaced by the HDPE manhole applies pres-sure on the bottom of the manhole. This cancause deflection in the bottom. The bottommust be thick enough or reinforced to limitdeflection to acceptable Cover or GrateMetal RingCast in ConcreteHDPE ManwayHDPE Manhole TopHDPE Manhole BodyNote:Manhole detail will vary per job. The amount of Mastic,if required, will be determined by void between manway opening and foundry ring.

10 Mastic should typically be 1/2" thick on the top side of the manway opening. Concrete pad must be designed by a Professional Engineer to verify H-20 Load Detail(Not to Scale)Concrete Padwith RebarINSTALLATION7 INSTALLATIOND rawing 2 Foundry Connection Cover Detail INSTALLATION8 INSTALLATIONSPUMP MOUNTINGS pecial provisions must be made when mount-ing pumps on the base of an HDPE structure . A special mounting block can be welded to thebottom and serve as a point of attachment thatwill minimize the effect of torque and vibrationfrom a pump. Pumps that must be bolted down also can be accommodated by a concrete pad, a minimumof 8 inches thick reinforced concrete poured intothe bottom of the manhole. Anchor the pump tothe concrete via anchor bolts but do not pourthe concrete prior to final placement of the manhole. If concrete is poured prior to final placement, the structure may be damaged. Allmounting configurations must be approved bythe engineer and/or the DRAWINGST ypical details are available from ISCOI ndustries.