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HomeMy WebLinkAboutPROPANE TANKrl� 4 Idowe in black plastic?ortwhiYe galvanized;steel- • - l e NSW! urtes S6OenDurab1e�1100coA. ftt Primeron,Ahoe„ground ; li�t'system P lgperilesmmcflitle nbtilGti4�. , ` • Dual service options for above or underground applications • Option #1: Ready -to -bury red oxide durable. powder coating with black • polyethylene AGUG dome' • Option #2: Aboveground option with steel 6" AGUG dome • All valves and float gauges -are centered under dome • Fabricated to the Iatest,A.S.M.E. Code, Section VIII, Division 1 • Registered with the National Board • #72 liquid level outage valveorifice reduces refueling emissions • vacuum pre -purged to save time, money and product 'Applicable federal, state, orlocal regulations may contain specific requirements for protective coatings and cathodic protection -The purchaserandinstaller.are responsible ` forcomplfance.with allfederal,state, localand NFPA industry regulations. Cathodic r t "y rotectj jis rep iredtand coating must be continuous and uninterrupted and must comply,wlfan ocal, state or''na3tonal'cnri�"<�h.>c;';, ''' - wvvw.TrinityContainers.com Call Toll Free: 888-558-8265 C1d�N It Y 0 General Specifications Conforms to the latest edition of the ASME code for Pressure Vessels, Section All, Division 1. Complies with NFPA 58. Rated at 250 psig from -20" F. to 125" F. All tanks may be evacuated to a full (14.7 psi) vacuum. Vessel Finish: Coated with epoxy red powder. ( Tanks coated with the epoxy powder must be buried). For Aboveground use, tanks may be coated with TGIC powder. Applicable federal, state or local regulations may contain specific requirements for protective coatings and cathodic Protection. The purchaser and installer are responsible for compliance with all federal, state or local regulations. FLOAT 0ICE - GAUGE� � L°• 6AS , SERVICE / MULTIVALVE 'RELIEF VALVE FITTINGS LAYOUT UNDER DOME ANODE CONNECTION AGUG VESSEL DIMENSIONAL INFORMATION 411 vessels dimensions are ap roximate WATER CAPACITY OUTSIDE DIAMETER HEAD TYPE OVERALL OVERALL LEG LEG WEIGHT LENGTH HEIGHT WIDTH SPACING FOLANTPE 120 wg. 454.2 L 24 Ellip 5' - 5 13/16" 3' - 0" 10 1/81, 3 0 LOAD STAC 250 wg. 609.6 mm 1671.3mm 911 A mm 257.2 mm 914.4 mm 245 Ibs. 111.1 kg. 96 12 946.3 L 31.5" 800.1 mm Hem! 7'- 2 112" 3' - 7 1/2" 12 3/4" - 6.. V. 472 Ibs. 63 9' 320 wg. 31.5" 2197.1 mm 1104.9 mm 323.9 mm 1066.8 mm 214.1 kg. 1211.2 L 800.1 mm Hem! 8' -11 3/4" 3' - 7 112" 12 3/4" 4' - 0 1/4" 588 Ibs. 45 g 500 wg. 37.42" 2736.9 mm 1104.9 mm 3215 mm 1225,E mm 266.7 kg. 1892.5 L 950.5 mm Hem i 9'.10" 2997.2 4' -1 7l16" 51. 8 Ibs, 30 6 1000 wg. 40.96" mm 1255.7 mm 381.0 mm 1524.0 mm 395.1 kg 3785.0 L 1040.4 mm Hemi 15' -10 13116" 4' - 4 5/16" 16 1/4- g - 172 15 5 4846.6 mm 1344.E mm 412.8 mm 2743,2 mm 31ko Rev: Jan. 27, 2016 Why Tanks Corrode Underground steel tanks corrode due to an electrochemical reaction between the tank and the surrounding soil. The process of corrosion occurs due to small voltage differences on the steel surface that result in the flow of DC current from one location to another. Where current flows from the tank into -the soil corrosion occurs. This location is called the anode in a corrosion circuit. Where current flows from the soil to the tank, no corrosion occurs. The progress of corrosion is determined by the amount of current flowing between the anode and the cathode and whetherthe locations of the anode/ cathode remain constant overtime. Corrosion rates are generally higher in wet soil environments since the conductivity of the soil promotes the flow of DC current in the corrosion circuit. Corrosion generally exhibits itself on underground tanks in either a general overall rusting or more commonly, a pitting attack. Pit locations may result from metallurgical conditions of the steel surface or soil variations such as rocks, salts, fertilizer, moisture concentration, oxygen concentration, etc. - Preventing Corrosion = Protecting underground tanks from corrosion is My' easilyachieved bythe use Of two commonly applied - s protection methods: external ,coating and cathodic protection. These two methods are complementary and should be used in `X conjunction with the other. An effective external rotective coating insulates the steel from the soil environment, thus preventing the flow of corrosion current from the anode to the cathode. An effective external coating can protect over 99% of the tank surface area. However, no coating is perfect. Damage from construction or soil stresses create tiny defects, 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. Application of sufficient DC current to the tank will prevent any corrosion from occurring. The two general types of cathodic protection systems are 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 current systems are more commonly used for large structures such as large diameter pipelines. Electrical isolation of the tank from metallic piping systems and electrical grounds is critical for the cathodic protection system's effectiveness. How Sacrificial 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. The open circuit potential of magnesium is about -1.55V to-1.80V. By connecting the two metals together, the difference of i 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 anode sizes 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 tanksare9lb.and17lb. 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. TheH-1 alloyisgenerallyveryeffective, Thefollowing chart provides sizeand quantity recommendations forvarious sizetanks based on conservative design assumptions. This chart covers soil 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 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 ,Fertile Solis, Ciay,�, land, Gravel, Rocky Sandy+Loam _ Areas Tank Cap. ;, _5 to 5000 ohm=cm 5000 to 10000 ohm -cm (9a1•) 120 ' 5i-0 i :19k Oty 1 Allay, `H-7 ' Size Qty. Alloy 9# 1 H-1 150 9#- _ :_ 1_ H-1 9# 1 H-1 250 9#. ,;. 1 H-1, ; 9# 2 H-1 325 ._,9k`t. 1,_;H-1 9# 2 H-1 500 1000 :1L 17#' H-1` H-1 9# 4 H-1 1500 17# .; 2 W1 9# 4 H-1 2000 174 3 H__ 9# 0 H-1 "Based on 90% effective external coating, 2 mxft2 current density, and 30- yearAnode life. Anode Installation 1. Determine size and quantity of anodes from application chart. 2. When a single anode is installed, it should be located near the tank center on either side of tank. 3. When multiple anodes are installed, space them evenly around the tank. See examples below. M=�"I Z anodes 4 anodes = t� , 4.Anodes are shipped in either cardboard boxes or multi -wall papersacks. Remove outer contain Brand bury the cloth bagged anode. If anode is supplied in plastic bag, remove plastic bag before installing. 5. Install anodes approximately two to three feet from the tank and at least as deep as the center line of the tank. Anodes work best in locations with permanent moisture, so generally the deeper the better. 6.After placing the anode, stretch out the anode connection wire and extend over to a connection point on the tank fill pipe. 7.Cover the anode with approximately six inches of backfill and pour 5 gallons of water on the anode to saturate the prepared backfill. Water is necessary to activate the anode. 8.Connect the anode wire to the tank with a low electrical resistance connection. Examples are threaded stud on the tank fill pipe or any accessible metallic connection point to the tank. All connections should be coated with a moisture -proof material. 9.Ideally, the tank connection is made in the area of, the tank fill pipe within the covered dome. With access to the anode wire, subsequent testing of the tank can include measurement of anode output and verification of performance. 10.Verify performance of the anode using an appropriate test procedure. IU:�>:anical 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: Insertthe 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 %2 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 deionized 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: Do 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. Distributed By: Ideal for use as a first stage regulator on any domestic size ASME or DOT container In propane Pressure to n Intermediate di to 1,essure BTU's per hod,. The regulator is factory set to reduce container Pressure to an Intermediate pressure of a P pane gas pproximately 10 PSIG. Ordea'ouorg infforlinaQe®iiin LV34o3YRV0 I A' F.NPT I +," F.NPT I hi � v 10 PSIG Over outlet Maximum flow based on Inlet 20 roM q nn 1 so0 000 (ling dtl delivery Pressure 20%lessure ower then the selling, higher than Na egull�selling and dehvary pressure 207- lower then the regulator Provides accurate refirst o(5 to stage regulation In two Intermediate pressure stage bulk tank systems Reduce tank pressure to an Industrial furnaces or boilers. PPIY high Pressure burner, for applicadons like 10 PSIG. Also Used to supply Also Incorporated In multiple cylinder Installations. ®¢'c�ee'on� 9o�ff®trt7sa��ea±rc� us ed sed loag far ste pressure wile use pamphlet 1so.-9 eommi, must eithsr Inomporeto Integral miter value or separate relief valve should be spe,Piedin accordance " Maximum Dow based on Inlet preusum 20 pSIG high,, than the regulator selling and dehvary pressure 20%lower than the selling. Designed to reduce first 'stage pressure of 5 to 20 PSIG down to burner pressure, Ideal for medium commercial Installations, multiple cylinder Installations and normal domestic O'delr©nq onffairmm-affbpn loads. mnormally 11" W.C. 10 PSIG inlet and 9' w, delivery pressure. The LV3403BR Back Mount Regulator is designed to reduce first stage pressure of 5-10 PSIG down to burner pressure normally 11" w.c. Designed as a second stage regulator for smaller applications with now requirements up to 450,000 BTU' hr. and are ideal for homes, mobile homes, and cottages. QP¢�®_ 1 !11q AffiiffdAA-6id���®G'Si Maximum flow based on 10 PSIG inlet and S" w.c, delivery Inlet 16 ry pressure. Maximum Capacity of PE Pipe In Thousands of BTU per Hour of Liquefied Petroleum Gas wiih a Gas Pressure 01 11.0 In. VIC and i PrGssurs Drop of 0•8 in. WC 107 147 132 112 99 89 _„ 75 V4 O1 46 46 44 42 40 238 209 188 160 140 126 116 107 10D 94 89 85 427 376 338 287 252 227 208 192 180 169 81 78 75 160 152 642 569 616 441 391 354 326 303 285 269 146 140 134 255 244 1207 1061 956 810 712 642 587 544 608 478 233 224 216 463 431 411 394 379 Maximum Capacity of PE Pipe In Thousands of BTU per Hour of Uquefed Petroleum Sit 616BTUh=1CFH Gas with a Gas Pressure of 2.0 psi and a Pressure Drop of psi (based on a 1.52 specificgraviP7 gas) w.r rncvr. Ma 1966 1379 1045886 779 702 595 523 471 431 399 373 17300 7586 6008 5092 4479 4033 3418 3007 351 309 278 2707 2478 2295 2144 14652 9836 7790 6602 5807 5229 4432 3898 3510 3213 2975 2780 2877 74083 2018 1775 1599 11100 9408 8275 7451 6315 5555 5002 4578 4239 3962 37514 25183 19946 16905 14869 2617 2302 3729 3280 2073 13389 11348 9982 8988 8226 7678 7119 ' 43429 29848 23969 20515 18182 16474 74100 12496 6700 5894 2953 6307 11322 10417 9691 9092 105963 77131 56339 47750 4200D 37820 32054 28194 25388 23234 21517 8589 7612 6307 20108 78926 16647 74990 AA B 11 .B° Il .A0 236 207 •11 s°1 •1 Ay A° 187 758 139 125 115 106 -. 00 00 AA• 99 7365 1192 1073 910 800 720 659 611 571 537 1757 74 508 484 1545 7391 1179 1D37 934 855 792 740 696 659 627 462 443 699 443 425 4498 3956 3563 3019 2666 2391 2189 2027 1894 7783 7688 1605 698 5232 4740 4057 3596 3258 2997 2788 1533 1469, 14812 2616 2471 2347 2239 12705 11175 10063 8629 7502 6755 6182 5725 5350 2144 2060 1985 5036 4767 4535 4331 4150 3988 Maximum Capacity of PE pipe In Thousands 6168TUh=1CFH of BTU per Hour of Liquefied petroleum Gas with a Gas Pressure of 10.0 psi and a Pressure Drop 1.0 of psi (based on a 1.52 specific gravity gas) v y po0 WSMAML ° 111115 2476 1662 1A 05M°/ •0593 1116 - NIMM 14234 9555 7568 6414 5642 5080 sl 4906 3787 3410 3121 2890 2701 78455 72388 9812 8316 7315 6587 5583 4910 25 2 2236 2014 4422 4047 3747 3602 26296 17652 73981 11849 10423 9385 7954 6997 6300 3296 2899 2611 5766 5340 4990 47252 31720 25123 21293 18729 16865 14294 12572 11321 10361 63960 4697 4131 3720 9595 8967 8440 7423 37087 29782 25489 22591 20469 17619 15527 14068 12943 12041 11297 133476 89601 6685 10671 9458 70967 60148 52905 47640 40376 35574 31980 29267 27104 25329 8569 23840 20970 18882• 1707 2213 31M 5665 7334 16004 Ph: 1.800-662.0208 < Fax: 615.325.9407 0 Web: www.gastite.com