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HomeMy WebLinkAboutDOMESTIC TANKS�. w �}_ �_ .�_ U_NI ER R U�N�10001,11 5_,TIC .TA S .Y�, kfs�F� Y ��� `qN Y �tl LYY /Il��L3 � � •' 4{. 4 T rFr.m.t-.� d a7 by PERC �> ..r�J 5.7. FiutAm7 �L ri n '1d, in Dvorak padannnneo making z , x '. �? .• ' • Fx rr±'P 'orProtcalUaCoaknpaapplfad ,,, r on Undnr9round PmpaneTanks Bi$+ ��T J �tb,� t A e in.' black:p'lastic'or white galvanized' steel 10 ' ip(�WD�UR/?►'=(®neC"urea" Super D�rrable Topco f, ;with Z�nc;IRich�iPr , erloin1,Abouegitoundi iP:,©1NDURA� tUn6Cure Tw_o eoat!spre mk ro ertiesMQ6 de: .. � ° �" Zrtnc;Pri'cl�i�elapxy,;ilrilter � - . ,.r�r Su�erfitliltat?IeTGIC�p�.I,yesYerrtopcoai rs' Su�eFiortreora;osian�anilke�.ge(ItYote�iioiil , . s rPateri[Iiyendng;�fdrml_�lair@tliriirimer ati�ntopeoaf• ,• � , J_ L _-.... • Dual service options for above or underground applications. • Option Ill; Ready -to -bury red oxide durable powder coating with black • polyethylgne AGUE dome" • Option #2i Aboveground 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 with the National Board • #72 liquid! level outage valve orifice reduces refueling emissions • Vacuum pre -purged to save time, money and product 'Applicable federal, state, or locafregula lions may contain specific requirements for protective coatings and cathodic protection. The purchaser and installer are responsible for compliance with all federal, state, local and NFPA industry regulations. Cathodic protection isirequired and coating must be continuous and uninterrupted and must comply with•an local, state or national code. WM.TrinityContainers.com Call Toll Free: 888-558-8265 l TRINITY' Qenfaining OurWorld's Energy"• General Specifications 1forms to the latest edition of the ASME code for $sure Vessels, Section Vill, Division 1. Complies with ?A 58. ,d at 250 psig from .200 F. to 1250 F. All tanks may be �uated to a full (14.7 psi) vacuum. 3el Finish: Coated with epoxy red powder, ( Tanks coated the epoxy powder must be buried), For Aboveground use, may be coated with TGIC powder. (cable federal, state or local regulations may contain ific requirements for protective coatings and cathodic ction. The purchaser and installer are responsible for Iliance with all federal, state or local regulations, All 'sss-e-iss dimensions area vI TER OUTSIDE CA�ACITY DIAMETER 1 g0 wg. 40,4.2 L wg, 94 ,3, L 32� wg. 12 1.2 L Sol wg. 189 .5 L 100� Wg, 378WL 24" 609.8 mm 31.5" 800.1 mm 31.5" 800.1 mm 37.42" 950.5 mm 40.96" 1040.4 mm WITHDRAWAL FLOAT NOTICE`�� VALVE GAUGE °u � ANODE ��CONNECTION ' FILLER O Ol��_VALVE MULRICE �IV ALVE � NAME PLAtE RELIEF VALVE FITTINGS LAYOUT UNDER DOME AGUG VESSEL DIMENSIONAL INFORMATION )ximate HEAD OVERALL OVERALL TYPE LENGTH HEIGHT Ellip 5' - 5 13/16" 3' - 0" 1671.3mm 91114 mm Hemi 7' - 2 1/2" 3' - 7 1/2° 2197,1 mm 1104.9 mm Hemi 8' -11 3/4" 3' - 7 1/2" 2736.9 mm 1104,9 mm Hemi 9' -10" 41�- 2997.2 mm 1255.7 mm Hem! 15' -10 13/16" 4' - 4 5/16" 4846.E mm 1344.E mm LEG I LEG I WEIGHT WIDTH SPACING 10 1/8" 257,2 mm 32-- 3'9 mm 12 3/4" 323,9 mm 15" 381.0 mm 412.8 rnm 3'-0" 914.4 mm 1066,8 mm 41.0 1/4" 1225,E mm 5'-0" 1524.0 mm 9'-0" 2743.2 mm 2451bs. 111,1 kg, 472 lbs. 21-,-�g� 588 lbs. 266,7 kg, 87— 1 --_. 395.1 kg 1729 lbs. 784.3 ka QUANTITY FULL PER LOAD STACK 96 12 63 g 45 g 30 .6 15 5 Rev; Jen. 27, 2016 Z Focusea,B "ODIC/ / SOLUTIONS Why T nks Corrode Underg ound steel tanks corrode due to an electrochemical reaction betwee the tank and -the surrounding soil. The process of corrosion occurs Jue to small voltage differences on the'steel surface that result in the f w of DC current from one location to another. Where current flows f 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 � corrosion occurs. The progress of corrosion is determined by the amount of current flowing between the anode and the cathode and whethe the locations of the anode/ cathode remain constant over time. Corrosl n rates are generally higher In wet soil environments since the conduc vity of the soil promotes the flow of DC current in the corrosion circuit. uorrosi n generally exhibits itself on underground tanks in either a general , verail rusting or more commonly, a pitting attack; Pit locations may re R from metallurgical conditions of the steel surface or soil variations such as rocks, salts, fertilizer, moisture concentration, oxygen concentration, etc. ,> *w Preventing Corrosion Protecting underground "r tanks from corrosion is easilyachieved bythe use of two commonly applied F..2 protection . methods: external coating and cathodic protection. These • two methods are complementary and should be used in conjunction with the other. An . effective external protective coating i sulates the steel from the soil environment, thus preventing the flow f corrosion current from the anode to the cathode. An effective external mating can protect over 99%ofthe tank surface area. However, no coati is perfect. Damage from construction or soil stresses create tiny defe ts, which may result in accelerated corrosion at the defect. Cathodic) protection prevents corrosion at those defects by applying DC current from an external source, forcing the tank to become cathode, pplication of sufficient DC current to the tank will prevent any corrosiol i from occurring. The two general types of cathodic protection systems re sacrificial and impressed current. Sacrificial systems are used wh n the amount ,of current required for the protection is small, such as i underground propane tanks. Impressed current systems are more commonly used for large structures such as large diameter pipelines Electrical isolation of the tank from metallic piping systems and elect Ica] grounds is critical for the cathodic protection system's How Sac ficlai Cathodic Protection Works Sacrif i 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 bC 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. The open circuit potential of magnesium is about -1.55V to-1.80V. By connecting the two metals together, the difference of 1 to 1.25V volts results in current flow 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 anodesizes and alloys used for cathodic protection. The two primary alloys are designed as H-1 (or AZ63) 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 soil applications over 10,000 ohm -cm resistivity. 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 TW insulated wire is attached to the anodes. Anodes are then backfilled in a mixture of gypsum, bentonite, and sodium sulfate to lower the electrical resistance of the anode to soil. The mixture is a low cost, nonhazardous, electrically conductive backfill. The anode 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 recommendationsforvarious size tanks based on conservative design assumptions. This chart covers soil conditions UP to 10,000 ohm -centimeter resistivity. Resistivitles 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 resistivities 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 50' 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 electrically isolated from the,tank at the fill pipe connection. Copper and steel create a galvanic couple that will accelerate corrosion of the steel tank when directly. connected to copper piping. Generally, copper piping does not require cathodic protection. Soil Type Tank Cap 120 150 250 325 Boo 1000 1500 2000 i1sClay Sand, Gravel, Rocky Areas ohm -cm Bonn to 10000 ohm -cm Size Qty.. Allo 9# 9# 1 H-1 9# 1 H-1. 17# 1 H-1 17# 2 H-1 17# 2 H-1 17# 3 H-1 �5 to Qty. 1 1 2 2 2 4 4 6 Alloy H-1 H-1 H-1 H-1 H-1 H-1 H-1 H-1 -aase� on 9o% effective extemal and 30- coating, 2 ma/fl2 current density, yearAgpde life. 1. D'termine size and quantity of anodes from application chart. 2. Wien a single anode is installed, It should be located near the to i k center on either side of tank. 3. W en multiple anodes are installed, space them evenly around thi tank. See examples below. 1 node 2 anodes 4 anodes ............ 4.An as are shipped in either cardboard boxes or multi -wall papI r sacks. Remove outer container and bury the cloth bagged a e. If anode is supplied In plastic bag, remove plastic bag bef , re Installing. 5. Insi II anodes approximately twoto three feet from the tank and at k st as deep as the center line of the tank. Anodes work best in 1 ations with permanent moisture, so generally the deeper the etter. 6.Afte' placing the anode, stretch out the anode connection wire and Mend over to a connection point on the tank fill pipe. 7. Cow r the anode with approximately six inches of backfill and Pour 5 gallons of water on the anode to saturate the prepared back ill. Water is necessary to activate the anode. 8. Conr act the anode wire to the tank with a low electrical rests ance connection. Examples are threaded stud on the tank ill pipe or any accessible metallic connection point to the tank. All connections should be coated with a moisture -proof mate ial. 9.Ideal , the tank connection is made in the area of ,the tank fill pipe ithin the covered dome. With access to the anode wire, subs �quent testing of the tank can Include measurement of anod output and verification of performance. ` 10.Veri performance of the anode using an appropriate test proc X ure. Mechanical Connection Under Dome Cathodic Protection Testing Procedure Equipment:Needed: Digital Voltmeter, Red Test Lead Min.12' Long & Black Lead Min. 2' Long; Reference Electrode (Copper/Copper Sulphate Half -Cell) STEP 1: Using a digital voltmeter insert the red test lead into the Volt jack of the meter and select the 2 or 20 volt DC. scale. Clip red test lead connector to an uncoated metallic area of the tank, preferably to the fill pipe multivalve. A good solid connection is very important. (DO NOT connect to shroud). STEP 2. Insert the black test lead into the Common jack on the meter, and connect the opposite - end of the lead to a charged reference electrode (% cell). . . STEP 3: Remove protective cap from the porous plug at bottom end of electrode. Place porous plug end Into native soil (remove!grass If necessary) at four locations around the tank (one on each side of the tank, and one at each :end of the tank). If difficulty is encountered obtaining readings, moisten soil with water or dig % cell deeper into the soil. STEP 4: Record all four meter readings on an appropriate form. The least of all four readings should be a minimum of-0.850v or more negative. (Note: If any of the four readings are below (less negative) -0.850v then the tank is not fully protected). Charging Reference Electrode STEP 1:.Unscrew and remove porous plug end of new reference electrode. Add delonized or distilled water to the copper sulfate crystals, .filling electrode completely. The solution will turn blue in color and there should always be excess crystals at the bottom of the tube. DO NOT USE TAP WATER. STEP 2: Replace porous plug end of electrode and place In an upright .position so that the porous plug end is facing In the down position and let stand for 1 hour before use. This will allow the porous plug to become completely saturated before use. Caution: no not allow electrode to contact oil, road salts, or other substances that may contaminate the solution by absorption through porous plug. Do not allow electrode to freeze. Ideal for use as a first stage regulator on any domestic size ASME or DOT container in propane gas Installations requiring up to 1,500.000 BTU's per hour. The regulator is factory set to reduce container Pressure to an intermediate pressure of approximately 10 PSIG. ' Maximum flow based on inlet pressure 20 PSIG higher than the regulator selling.and delivery9.00 ° 1,500,000 selling and delivery pressure 20% lower than the selling. pressure 20%lower Than the regulator Provides accurate first stage regulation in two,stage bulk tank systems. Reduce tank pressure to an Intermediate pressure of 5 to 10 PSIG. Also used to supply high pressure burners for applications like Industrial furnaces or boilers. Also Incorporated in multiple cylinder Installations. When used far final stage pressure control, must either incorporate integral muef valve or separate relief valve should be speclfied'In accordance With NFPA Pamphlet 88. " Maximum flow based on Intel pre3surs 20 PSIG higher than the regulalor selling and delivery pressure 20°/, lower then the selling. t� Designed to reduce first stage pressure of 5 to 20 PSIG down to burner pressure, normally 11" W.G. Ideal for medium commercial installations, multiple cylinder installations.and normal domestic loads. ��di�rral�� prr�ffc�Ir�tI��6�lr� on 10 PSIG inlet and 9" lxc, delivery pressure. The LV3403BR Back Mount Regulator Is designed to reduce first stage pressure of 6-10 PSIG down to burner pressure normally 11,, w.c. Designed as a second stage regulator for smaller applications with flow requirements up to 450,000 BTUIhr, and are ideal for homes, mobile homes, and cottages. 0rrd airRuDS flrmforrasmatdol o Y, F NPT 2 rdvr I 7 I 11" w,c. At 10 U�8rl03BrI6R span F iVPT /3z PSIG Inlet Maximum flow based on, 10, PSIG inlet and 9" W,c, delivery pressure. I �,