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HomeMy WebLinkAboutGAS TANK PRODUCT INFORMATIONABOVEGROUND/UNDERGROUND DO MESTIC TANKS 120 - 2,000 wg PROPANE` N., rol COUNCILrxdA�, Ranked 01 by PERC In overall performance ranking • for Proteenvo Coatings applied �r w,.. NEW. ._._ POWDURAO OneCurej°° Super Durable Topcoat with Zinc Rich Primer on Aboveground IN. - POWDURA° OneCurerm Two coat system properties include: • Zinc rich epoxy primer 8" dome in black plastic or white • Super durable TGIC polyester topcoat galvanized steel • Superior corrosion and edge protection • Patent pending formulated primer and topcoat • Dual service options for above or underground applications . Option Ill: Ready -to -bury red oxide durable powder coating with black • polyethylene AGUG dome* °kS^ a Option #2: 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 local regulations may contain specific requirements for CONTAINERS' protective coatings and cathodic protection. The purchaser and installer are responsible antaining Our.s for compliance with all federal, state, local and NFPA industry regulations. Cathodic protection is required and coating must be continuous and uninterrupted and must comply with an local, state or national code. www.TrinityContainei-s.com Call Toll Free: 888-558-8265 TRINITIS ®" M. M== Containing Our World's Energy' LEG WIDTH General Specifications )rms to the latest edition of the ASME code for lure Vessels, Section Vlll, Division 1. Complies with ► 58. 1 at 250 psig from -20' F. to 125' F. All tanks may be rated to a full (14.7 psi) vacuum. II Finish: Coated with epoxy red powder. (Tanks' coated ie epoxy powder must be buried). For Aboveground use, may be coated with TGIC powder. ;able federal, state or local regulations may contain is requirements for protective coatings and cathodic ,tion. The purchaser and installer are responsible for iance with all federal, state or local regulations. WITHDRAWAL VALVE FLOAT ,�/ oncE. LP. G45 GAUGE ® ANODE -CONNECTION 5 FILLER I O O/I�'VALVE } SERVICE / NAME MULTIVALVE PLATE RELIEF VALVE FITTINGS LAYOUT UNDER DOME AGUG VESSEL DIMENSIONAL INFORMATION 11 All vessels dimensions i are approximate WA CAPACITY ER OUTSIDE DIAMETER HEAD TYPE OVERALL LENGTH OVERALL LEG LEG WEIGHT QUANTITY HEIGHT WIDTH SPACING FULL PER 120 454 �vg. L 24" Ellip 5' - 5 13/16" 3' - 0" 10 1/8" 31.011 245 lbs. LOAD 96 STAC 12 609.6 mm 1671.3mm 911.4 mm 257.2 mm 914.4 mm 111.1 kg. 250 946.. g. L 31.5" Hemi 7'- 2 1/2" 3' - 7 1/2" 12 3/4" 3' - 6" 47 63 9 800.1 mm 2197.1 mm 1104.9 mm 323.9 mm 1066.8 mm 14?11 kg. 320 12112 g. L 31.5" Hemi 8' -11 3/4" 3' - 7 1/2" 12 3/4" 4' - 0 1/4" 588 lbs. 45 9 800.1 mm 2736.9 mm 1 1104.9 mm 323.9 mm 1225.6 mm 266.7 kg. 500 1892 g. L 37.42" 950.5 mm Hemi 9' -10" 4' -1 7/16" 15" 5 - 0 871 lbs. 30 6 ' 2997.2 mm 1255.7 mm 381.0 mm 1524.0 mm 395.1 kg 1000 3785.�0 g.=1040.96" L Hem! 15'-10 13/16" 4' - 4 5/16" 16 1/4" 9'-0"1729 lbs. 15 5 11 1 4846.6 mm 1 1344.6 mm 1 412.8 mm 2743.2 mm 784.3 kq Rev: Jan. 27, 2016 Why Tank'' Corrode Undergrou d steel tanks corrode due to an electrochemical reaction between tliI tank and the surrounding soil. The process of corrosion occurs duel' o small voltage differences on the steel surface that result in the flow,! f DC current from one location to another. Where current flows frome tank into the soil corrosion occurs. This location is called the anode ira corrosion circuit. Where current flows from the soil to the tank, no co osion occurs. The progress of corrosion is determined by the amount')f current flowing between the anode and the cathode and whether the �ocations of the anode/ cathode remain constant over time. Corrosion r' 'tes are generally higher in wet soil environments since the conductive 1� )f the soil promotes the flow of DC current in the corrosion circuit. 1 Corrosion generally exhibits itself an underground tanks in either a general over,ll rusting or more commonly, a pitting attack. Pit locations may result f iom metallurgical conditions of the steel suraface or soil variations su h as rocks, salts, fertilizer, moisture concentration, oxygen concentration, etc. 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 external protective coating insula s the steel from the soil environment, thus preventing ,the flow of corrosion current from the anode to the cathode. An effective extemalcoafini can protect over 99% of the tank surface area. However, ,no coating is p; 'rfect. Damage from construction or soil stresses create tiny defects, w `ch may result in accelerated corrosion at the defect. Cathodic prot a fflon prevents corrosion at those defects by applying DC current frq an external source, forcing the tank to become cathode. Appli tion of sufficient DC current to the tank will prevent any corrosion from 1 ccurring. The two general types of cathodic protection systems are sa , ificial and impressed current Sacrificial systems are used when the mount of current required for the protection is small, such as in underground propane tanks. Impressed current systems are more cam r' �nly used for large structures such as large diameter pipelines. Electµµ cal isolation of the tank from metallic piping systems and electrical gtl unds is critical for the cathodic protection system's effectiveness. How Sacrificial athodic Protection Works Sacrificial syste s 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 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 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 tanks are 9 lb. 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 backfili. The anode and backfiil 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 forvarious size tanks 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. Type '� NI !"", ++iay� giant bevel, Rocky Areas k Cap, , `5 to 500 �� ~ 5000 to 10000 ohm -cm al.) Size Oty. Alloy 20 9# 1 H-1 50 9# 1 H-1 H ..' 9# 2 H-1 50 25 9 1 -,1 9# 2 H-1 00 r - 9# 2 H-1 100 1r ' t 9# 4 H-1 00 � 9# 4 H-1 00 9# 6 H-1 *Based on 0% effective external coating, 2 ma/ft2 current density, and 30- yearAnode ife. Anode In aliation 1. Deter ine size and quantity of anodes from application chart. 2. When ;l single anode is installed, it should be located near the tank c Jnter on either side of tank. 3. When' anodes are installed, space them evenly around the ta'�.Ultlple See examples below. 1 anc d e 2 anodes 4 anodes =4,0 0 C;1D �o�x I'I 4. Anode' are shipped in either cardboard boxes or multi -wall paper s cks. Remove outer container and bury the cloth bagged anode.'f anode Is supplied in plastic bag, remove plastic bag before ( istalling. 5. Install a odes approximately two to three feet from the tank and at least �s deep as the center line of the tank. Anodes work best in locat p ns with permanent moisture, so generally the deeper the belt r. 6. After pi Jing the anode, stretch out the anode connection wire and extend over to a connection point on the tank fill pipe. j7. Cover t - anode with approximately six inches of backfill and pour 5 1110ns of water on the anode to saturate the prepared backfill. Alater is necessary to activate the anode. 8. Connect the anode wire to the tank with a low electrical resistan9�� connection. Examples are threaded stud on the tank fill P Pe or any accessible metallic connection point to the tank. All connections should be coated with a moisture -proof material. 9. Ideally, t tank connection is made in the area of the tank fill Pipe with the covered dome. With access to the anode wire, subseque t testing of the tank can include measurement of anode ou out and verification of performance. 10.Verify pe ormance of the anode using an appropriate test nmrori i i re' MechanL::o; 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 blacktest lead into the Common jack on the meter, and connect the opposite end of the lead to a charged reference electrode (M 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 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. Why Tank Corrode tlndergrou d steel tanks corrode due to an electrochemical reaction between th tank and the surrounding soil. The process of corrosion occurs duel, o small voltage differences on the steel surface that result in the fio4 f DC current from one location to another. Where current flows from Ii'(,If e tank into the soil corrosion occurs. This location is called the anode i corrosion circuit. Where current flows from the soil to the tank, no co'sion occurs. The progress of corrosion is determined by the amount current flowing between the anode and the cathode and whether thecations of the anode/ cathode remain constant over time. Corrosion rs are generally higher in wet soil environments since the conductivit iof the soil promotes the flow of DC current in the corrosion circuit. I1 Corrosion 9"' nerally exhibits itself on underground tanks in either a general over, II rusting or more commonly, a pitting attack. Pit locations may result f'am metallurgical conditions of the steel suraface or soil variations su h as rocks, salts, fertilizer, moisture concentration, oxygen concentratiolh, etc, xt3,4, ws Preventing Corrosion h" Protecting underground tanks from corrosion is easily achieved bythe 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 external protective coating Insula es the steel from the soil environment, thus preventing �theflowofcor osion current from the anode to the cathode. An effective externalcoatln' can protect over 99% of the tank surface area. However, !no coating is p', rfect. Damage from construction or soil stresses create tiny defects, w Mich may result in accelerated corrosion at the defect. Cathodic protection prevents corrosion at those defects b applying Y DC current fro an external source, forcing the tank to become cathode. Applit Ition of sufficient DC current to the tank will prevent any corrosion from occurring. The two general types of cathodic protection systems are sal rificial and impressed current. Sacrificial systems are used when the mount of current required for the protection is small, such as in and rground propane tanks. Impressed current systems are more corn only used for large structures such as large diameter pipelines. Elect, cal isolation of the tank from metallic piping systems and electrical g unds is critical for the cathodic protection system's effectiveness. How Sacrificlal�, athodic Protection Works Sacnficlal 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 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 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 tanks are 9 lb. 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 recommendations for various size tanks 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 reslstivities 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. Sand, Gravel, Rocky Areas 5000 to 10000 ohm -cm Size Oty. Alloy 9# 1 H-1 9# 1 H-1 9# 2 H-1 9# 2 H-1 9# 2 H-1 9# 4 H-1 9# 4 H-1 9# 6 H-1 'Based on 9 % effective external coating, 2 ma/ft2 current density, and 30- yearAnode 1 e. Anode Inst Illation 1. Detern ne size and quantity of anodes from application chart. 2. When single anode is installed, It should be located near the tank center on either side of tank. 3. When ultiple anodes are installed, space them evenly around the tan See examples below. � II 1 ano e 2 anodes 4 anodes '' C7911 4.Anodes lare shipped in either cardboard boxes or multi -wall paper s' cks. Remove outer container and bury the cloth bagged anode. � f anode is .supplied in plastic bag, remove plastic bag before i stalling. 5. Install odes approximately two to three feet from the tank and at least!s deep as the center line of the tank. Anodes work best in locatl ns with permanent moisture, so generally the deeper j the bett''r. 6.After pl cIng the anode, stretch out the anode connection wire and ext '}td over to a connection point on the tank fill pipe. 7. Covert anode with approximately six inches of backfill and pour 5 dallons 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 resistan 'e connection. Examples are threaded stud on the tank fill' ipe or any accessible metallic connection point to the tank. AI connections should be coated with a moisture -proof material', 9. Ideally, I e tank connection is made in the area of the tank fill pipe witt n the covered dome. With.access to the anode wire, subsequ nt testing of the tank can include measurement of anode ot put and verification of performance. 10.Verify performance of the anode using an appropriate test Mechanica,Limection 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 blacktest lead into the Common jack on the meter, and connect the opposite end of the lead to a charged reference electrode (%2 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 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 Ir use as a first stage regulator on any domestic size ASME or DOT ontainer in propane gas installations requiring up to 1,500,000 �`➢SF� BTU' per hour: The regulator is factory set to reduce container U� press re to an intermediate pressure of approximately 10 PSIG. Orlidlering Information tvs '�V F.NPT I M." F.NPT I '/" I pSIG Uverr'00utlet 1 1,500,000 I LV3403TR flow based on inlet pressure 20 PSIG higher than the regulator setting and delivery pressure 20% lower than the regulator setting and delivery pressure 20% lower than the setting. accurate first stage regulation in two -stage bulk tank Maxl um Oow based on 10 PSIG Inlet and 9" w.c. delivery pressure. 74 LV4403B Series 100 Rego Dr. P.O. Box 247 Elon, NC 27244 USA www.regoproducts.com Phone (336) 449-7707 Fax (336) 449-6594