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Home My WebLink AboutDOMESTIC TANKS8" dome in black plastic or white galvanized steep U-N; D: D MESTI'CT ANKS -120 -- 2,000 wg 4 NEW ri p.UWOURAO-Onecure "Super Durable Topcoat with ZinG Rich Primer on Ahoveground POWDURA° OneCuWm Two coat system pmpbr ies include: Zlnr, rich epoxy primer • Super durable TGIC jjol`yester topcoat • superior corrosion and -edge protection Patent, pending fnrmulated primer and topcoat • DLlal service options for above or underground dppiicat101is • Option M : ReadHo-bury red oxide durable powder coating with bhcck • Polyethylene AGUE dome' • Option ;12: /lhovegrauncl option with steel 8" AGUG dome • All valves and float gauges are centered under dome • Fabricated to the latest A.S.M.E. Code, section Vill, Division -1 • Registered WRIT the National Board • '472 liquid level oi.ltage valve orifice reduces refueling emissions • Vacuum Pre -Purged to save time, money and product '11pplicable federal, state, orlocai regulations may contain specific requirements to/ - protective coatings and cathodic protection. The purchaserand installerara responsible For compliance with all federal: state, local and NFPA industry regulations. Cathodic protection is,recli irul and coatiny rrnisl bu cuminuous UnU Url111101ruptrwl �turl [mist comply with an local, state or national code. www.TrinityContainers.com Call Toll Free: 888-558-8265 ,S ,� I III ' � 11 i I • �. • TRINIV Qe»}a�i.,8 Our LiyNds Ene�gyw fie-- .l Speclficatin, rms to the latest edition of the ASME code for 're Vessels, Section Vill, Division 1. Complles with 58. ed at 260 psig from 20° F. to 125° F. All tanks may be cuated to a full7 , 14 ( psi)vacuum. sel Finish: Coated with epoxy red powder, ( Tanks coated the epoxy powder must be buried). For Aboveground use, s may be coated with TGIC powder. 'cable federal, state or local regulations may contain We requirements for protective coatings and cathodic ction. The purchaser and Installer are responsible for Ilance with all federal, state or local regulations. 454�2 L 946.3 L 11 320 g, 1211, L 76511 g. 1892;1 L 1000 g 3785,U L ienstons are aop Ima eC' VESSEL DfMEfVSI DOUIAMETSIDE TER HEAD TYPE OVERALL OVERALL LENGTH HEIGHT 24" 609.6 mm Ellip 5' . 5 13/16" 3' . a° 1" 3,5 1671.3mm 911,4 mm 80mm Heml 7' - 2 1/2" 3�` 31.5" 2197, 1 mm 1104.9 mm 800.1 mm Hem! 8' -11 314" 1, 3' - 7 1/2 37.42" Hemi 2736.9 mm 1104.9 mm 950.8 mm 91. " 10 2997.2 mm 4' -1 7/16" 40. Hem) 16 -10 13/16" 1255,7 mm 4' - 4 5/16" 1040.4 IT m m - 4846.6 mm 1244.E mm WITHD GSLIT AUGEVALVBRAWAL OANODE CONNECTION d O® FILLER Q (0/'VALVE T ' SERVICE / / MULTIVALVENAM _ PLATE RELIEF VALVE FITTINGS LAYOUT UNDER DOME INFORMATION LEG WIDTH 257.2 mm .12 3141, 323�m 12 3/4" 15" 381.0 mm 412.8 mm LEG I WEIGHT QUANTITY SPACING FULL PER 3'-o" 111.4 mm 31 _ 61! 1086---gym 41.0 114" 1225.6 mm 61.011 1524.0 mm 245 Ibs. 472 Ibs. a21, 688 Ibs, 266.7 kg. 87-- 1-�s. ..- 395.1 ka LOAD STACK 96 12 63 9 45 9 30 1 .6 9' ' 0" 1729 Ibs_ i 6M 2743.2 mm 784.3 ko Rev. Jan. 27.2010 wny rpnks Corrode Underground steel tanks corrode due to an electrochemical reaction between the tank and the surrounding soil. The process is corrosion occurs due to small voltage differences on the steel surface that result in the ow of DC current from one location to another. Where current flows m the tank Into the soil corrosion occurs. This location Is called the ano a in a corrosion circuit. Where current flows from the soil to the tank, n f corrosion occurs. The progress of corrosion is determined by the am trnt of current flowing between the anode and the cathode and whethe Ithe locations of the -anode/ cathode remain constant overtime, Corrosl L[ rates are generally higher in wet soil environments since the conduci�viiy of the soil promotes the flow of DC currant in the corrosion circuit. uvi►us,op, generally exhibits itself on underground tanks in either a general �verall rusting or more commonly, a pitting aft ak Pit locations c may res It from metallurgical conditions of the ste ✓arlatlon�tlon, etc, such as rocks, salts, fertilizer, el surface or soli ;oncentr�moisture concentration, oxygen ;. Preventing Corrosion Protecting underground tanks from corrosion is easily achieved by the use Of two commonly applied protection methods: external coating and cathodic protection. These two methods are complementary and should be used in conjunction with the other. An effective coating 1n$lulates the steel from the soil environment, thus external protective the flow of corrosion currentfrom the anode to the cathode. An eff ct ve externalcoutingcanprotectOver99%ofthetanksurface area. However, no coating is perfect Damage from construction or soil stresses create tiny defect i which may result in accelerated corrosion at the defect. Cathodic prlotection prevents corrosion at those defects by applying DO curren44 from an catathode, external source, forcing the tank to become Application of sufficient DC current to the tank will prevent any corrosion from occurring. The two general types of cathodic protection systems ar, sacrificial and Impressed current Sacrificial systems are used when the amount of current required for the protection is small, such as in underground propane tanks. Impressed Cllrrpnt syStOMS 11(r A p 1061`11Y USed %r large structures such as large diameter pipelines. Electrical isolation of the tank from metallic piping systems and electriutal grounds Is critical for the cathodic protection system's P.ffpAwannJel How SacIficial Cathodic Protection Works Sacrificial Systems work by creating a galvanic connection between two different metals. The most common anode material is magnesium, which when coupled to steel results In DC current flow from the magnesium to the steel. The open circuit potential of steel Is about -0.50 volts referenced to a copper sulfate electrode Potential of magnesium is about -1.55V to-1.80V, g The open circuit . two metals together, the difference of 1 to 1.25V volts ryesults In current Uralflow to the tank that overcomes the natural corrosion cells that exist on the tank. With this current available to the tank, no corrosion occurs. Magnesium Anodes There are a variety of anode sizes and alloys used for cathodic protection. The two primary alloys are designed as H-1(or A763) and High Potential. The H-1 alloy is produced from recycled magnesium and has an open circuit potential of approximately—1.55V. This alloy Is well suited for protection of underground propane tanks. The High Potential alloy is 99% pure magnesium having an open circuit potential UP to -1.8V. This alloy should be used for ohm -cm resistivity: sail applications over 10,000 The two most common anode sizes used for underground propane tanks are 9lb. and 171b. The size designation relates to the metal weight 10' of #12 TIN Insulated wire is attached to the anodes. Anodes are then backfllled in a mixture of gypsum, bentonke, and sodium sulfate to lower the electrical resistance of the anode to soil. The mre Is a low cost, nonhazardous, electrically conductive backfill.Th ano a and backfill Is then packaged in a cotton bag and either a cardboard box or paper bag, Actual shipping weight of these anodes with backfill' is 27 lb. and 45 lb. Application Recommendations Magnesium anodes can protect underground tanks in most soil conditions. The H-1 alloy is generally very effective. The following chart Provides size and quantity recommendations for various size tanks based on conservative design assumptions, This chart covers soli conditions UP to 10,000 ohm -centimeter resistivity. Resistivities higher than 10,000 ohm -centimeter generally represent very dry soils. Verification of soil resistivity can be, performed through soil analysis. Contact us for design recommendations in locations where soil rssistivities exceed 10,000 ohm -cm, or If there Is no effective external coating on the tank. The propane service line from the tank to the house also must be considered in the cathodic protection design, unless the service line is plastic. All underground. steel pipe should be externally coated with a corrosion resistant material. The service line should be electrically isolated at the house with an insulating fitting or union. If service pipe Is less than 60' In length, the tank anodes will provide sufficient current to proteCt both tank and pipe. For longer lengths of pipe, an additional anode may be required at the house connections. If another metallic material such as copper is used for service piping. the pipe should be electticatty isolated from the tank at the till pipe conneatlon. Copper and steel create a galvanic couple thatwiil accelerate corrosion of the steel tank when directly connected to copper piping. Generally, copper piping does not require cathodic protection. Mechanical Connection Under Dome W 6 H-y Warnodic protection Testing n90 ; eflective extema/c0adn9, 2mal#2currentdens! g Procedure de life. Equipment Needed: /1, and 30- & Black Lead Digital Voltmeter Red Test Lead installation Min, 2' Long, Reference Electrode Min' 12' Lon Sulphate Half -Cell) r tl mine size and quantJty of anodes from (COpper�C°Aperapplication chart STEP 1: Using a digital voltmeter Insert a single anode is (nstalJed, !t should be located near thja single on either side s tank. lack of the meter and select the 2 or 20 v �n multiple anodes are Installed, space them even( a lead connector to an uncoated the red test lead Into the Volt nk. See examples below, to le the fill pipe r to calve. volt DC scale. , p red test �o Y around (DO NOT connect to shroud] 00d solid Connectiorea of n is tank, e k' preferably de 2anodes STEP 2:InserttheblacktestieadJ ,ryimpont. 4 anodes and connect the o Into the Common jack on the meter, electrode ec cell), ppOSIte end of the lead to a charged reference �� -•-; :,., STEP 3. of STEPele. Remove protective cap f trade. Place porous lup from the porous plug at necessary)p g end into native soil (remove bottom end s are shipped at fate locations around the tank (one it each side o If ticks, pp in either cardboard boxes or tank, and one at each end of the tank , gross e Remove outer- container and bury multi -wall °btalntng readings, moisten sot! with water oral] ui f the +�If anode is supplied in plastic ba rythe cloth ba the soil. difficulty is encountered stafiing, g, remove Plastic d STEP 4: Record all four meter readings g � cell deeper Into Podes approximate( p g least of all four readings should di a minimum is deepYtWO to three feet from the tank and negative. 9s in an appropriate form. The as the center line of the tank, (Note; If any of the four readings are belof '0ow �jeSOv or more ns with permanent moisture, So Anodes work best-0•850v then the tank Is not fully protects �• generally the deeper d}, ( s negative) .lna tnA �.,,..,_ _ --wor btretcn Out the anode id over to a connection point the tank fill pipe wire f anode with approximately six nches of backfill and lions of water on the anode to saturate the prepared Vater Is necessary to activate the anode. he anode wire to the tank with a low electrical connection. Examples are threaded stud on the ie or any accessible metallic connection point to the onnections should be coated with a moisture -proof tank connection is made In the area of the tank fill the covered dome. With access to the anode wire, it and testing of the tank can include measurement e, of man ee ofthen Of anode�u. Performance STEP 1; ----- "abjruae electrode. Add and remove porous Add delonized or distilled al err to ug the co w reference crystals, filling electrode co►►�pletel . color and there should always be excess c s copper sulfate Y The solution will turn blue in the tube, DO NOT USE TAP WATER, crystals at the bottom of STEP 2: Replace porous plug end of electrode and place In an Position so that the porous plug and is facing in the down posit and let stand for 1 hour before use. This will allow the upright to become completely saturated before use. ion Cau(/on; po porous plug not allow BleCtrode to contact nil, roadsa/�s, orolher substances that may contam/note the $olution b through porous Plug. Do not allow eleclrod®to freeze. Y absorptlen 0 for use as a flrat stage regulator on an • ' WIM stlons requirin JIG to an inter 9 up to 1,500,0o0 gTtJ's y domestic size ASME or DOT container in Propane mediate pressure of a per hour. The regulator is AProxfmately 10 PSIG, factory set to redue ontainer FNPT %"FNPT r/3z" m Uow based!on Inlet Press,,, 10 PSiG Over Outlet deliverypressure nlet tows,,, 20 PSIG higher then there than the setting. 8uletor selting and dallve 9:OD 1,500,D00 ry Pressure 20^/a lower than ;theregulator accurate first stage re10 • ate pressure of 5 to 10 pg tl n in two -stage bulk tank systems, , , , furnaces or boilers. Also Incorporated used to su Reduce P rated in pply high pressure burners or a Pressure fi e l kan e Ing ink®�, ation multi le c linder installations, pAfications like 9 F NPT %" F NPT P POL° '/"FNPT Yes 2,500,00 rornnalste 10 amphtat to a Pressure cal JIM,1 must elfherinco 5-10 w based on Inlet thorete Integral rellef valve orseparats Pressure 20 PSIG higher the relief valve should be n the regulatorsetUn epeclllad In accord,, � Band delivery pressure 20%laws ^ " r than the setting, reduce first stage pressure of 5 to 20 PSIG down to burner llum commercial installations, multiple cylinder installations and nor 1 It�t�o8' Aressure, normally 11" w c. �'� iion mat domestic loads, Zu ya" F NPT �" F. NPT #28 Y-" F, NPTI Drift on 10 P81G in, end g" w,o; delivery Pressure. 11" w,c, at 10 9" to 13" PSIG W.C.Over Inlet Inlet 935,000 The LV3403i� Back Mount Regulator Is designed to reduce first burner 40)3 • ° • re wire p re normally 11 ° w c. pesigned as a second eta a r stage q mentf !up tc 450,000 grU/hr. and are ideal for homes, mobile homes, pressure of 5,10 PSIG 9 gulator for smaller applications with otw Ordering Infotrnaeto®�y Ines, and cottages. LV34Q3B48R 2" i :NPT �� r.IVN t as„ 11° w.c. At 10 9° ��450.000M FNPT PSIG Inlet waximum fl w based on 10 PSIG Inll3t and 9" w.c, delivery pressure, 16 �