HomeMy WebLinkAboutGAS PIPING SCHEMATICBOARD OF
COUNTY
COMMISSIONERS
GAS PIPING SCHEMATIC
[A4]
[L4]I [L8]
TANK 1.1 1.3 1.51 rl-71 Mi rLI
SIZE
1.2] [L6] 1[1.10]
[Al]
TANK SIZE: c<200 GALS.
APPLICANCE — TYPE/SIZE
Al __Genet-u�
A2
A3
A4
A5
A6
PIPING LENGTH & SIZE
L1 fS(o FT.
INCH DIA.
1-2
FT.
INCH DIA.
L3
FT.
INCH DIA.
L4
FT.
INCH DIA.
L5
FT.
INCH DIA.
L6
FT.
INCH DIA.
L7
FT.
INCH DIA.
L8
FT.
INCH DIA.
L9
FT.
INCH DIA.
L10
FT.
INCH DIA.
1-11
FT.
INCH DIA.
L12
FT.
INCH DIA.
Revised 7/22/14
PLANNING & DEVELOPMENT
SERVICES DEPARTMENT
Building and Code Regulation
Division
[A6]
[L1
�] ST. LUCIE C6uN7y
BUILDING DIVISION
F1EV91E8 r4D
FOR (�10*1Pd.1 A
REVIEWED By
DATE7^--
P6Ahl�PiRMIT
MUST tin KEPT 014 am OR
No IN&IJUITION WILL pS
I sa r
BTU
BTU
BTU
BTU
BTU
(PIPE SIZE WAS TAKEN FROM
THE 2014 FBC FUEL GAS CODE -
TABLE 402 (_____�)
9,017 rI5(- 6+'x iel� 114r'oct
M011dP4C-k rc-e S 7',,-d!,
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Website: www.stlucleco.aov
2300 Virginia Avenue - Fort Pierce, FL. 34982-5652
Phone (772) 462-1553 FAX (772) 462-1578
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► • Dual service options for above or underground applications -�
r Option 41; Ready -to -bury red oxide durable powder coating with block
• polyethylene AGUG dome*
• Option lZi'Aboveground option vvith"steel 8" AGUG dome ,
` • All float au es are centc-•red under dome
9 9
• FabYlcated-to`the IatestA.S.M.E. Code, Section All, Division 7
• Registered with the National Board
• 472 liquid"level outage valve orifice reduces refueling, emissions
'
r i!;'� • Vacuum pre, purged- to save time, money and product
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�• , Ft'-`';°"`A.""p•'pljcable;Federal;Sfate,ol",lgaah'reyulatiogs.may,confa�nsAeclGerequjrementsfor •'
protectjve edatings and'cathodjc,protection. The,purchaserand instal%rare'responsible
t for compJjanee with,all federal, state, local and N, F•AA•industry regulations. Caff,
dir
proteotion isirequir:ed and coating must be continuous and uninterrupted and must
cotnplywith•"an°local, state or national code,
•uvrnrwi ;ritili i .Confi - tY , aineis.corrm Call.T I Free: 888-558-8265 "°!
C'onfpjrifng Our World'a Energy��
." V I fl
General SO dricarlons
Conforms t0 the latest edition of the ASME code for
Pressure Vessels, Section Vlll, Division 1. Complies with
NFPA 58.
Rated at 250 psig from -200 F. to 1260 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,
WITHDRAWAL
FLOAT NOTICE` VALVE
GAUGE I.P. cas
/ANODE
11%=1 0 �1C CONNECTION
O O.�_FILLER
VALVE
SERVICE!
MULTIVALVE NAME
-�- PLATE
RELIEF
VALVE
FITTINGS LAYOUT UNDER DOME
All vessels dimensions area go�x ma eC' VESSEL DIM1;N��p�qL INFORMATION
WATER OUTSIDE HEAD OVERALL
CAPACITY DIAMETER TYPE OVERALL LEG LEG
LENGTH HEIGHT WIDTH WEIGHT QUANTITY
120 wg. 24" SPACING FULL PER
454.2 L Elllp 5' - 5 13/16" 3' - 0" LOAD STACK
609.E mm 1671.3mm ' 10 1/8,� 3' - 0" 2451bs.
911.4 mm 257.2 mm 914.4 mm 96 12
250 wg. 31.5" Hemi 7 - 2 1/2 3 _ �� 111.1 kg,
946.3 L 800.1 mm 7 1/2 12 3/4" 3' - 6"
2197.1 mm 1104.9 mm 323,9 mm 472 lbs. 63 .9
32o wg. 31,5" Heml 8' -11 3/4" 3' - 7 1/2" 12 3/4" 1066.8 mm 214.1 kg,
1211.2 L 800.1 mm 4 0 1/4 588 lbs.
2736.9 mm 1104.9 mm 323,9 mm 1225,E mm 45 9
600 Wg. 37.42" Hem( 266,7 kg,
1892.5 L 950.5 mm 9 -10 4' -1 7/16,- 15" 51.011
2997,2 mm 1255,7 mm 381.0 mm 871 lbs. 30 .6
1000 Wg, 40.96" Hemi 15' -10 13/16" 4' - 4 5/16° 1524.0 mm 395.1 kg
3785.0 L 1040.4 mm 4846.E mm 16 1/4' 9' - 0" 1729 lbs.
1344.6 mm 412.8 IM 2743.2 mm 784.3 ka 15 5
Rev; Jan, 27, 2016
THRiffy
Oontaining OurWorld's Energy'+
rJl In
_Genera(Specificaf(ons
Conforms to the latest edition of the ASME code for
Pressure Vessels, Section Vlll, Division
NFPA 58. 1. Complies with
Rated at 250 psig from -20' F. to 1260 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,
" — — WITHDRAWAL
FLOAT ,'/- OTICE`� VALVE
GAUGE t.a. cns Z%
ER
,` �-ANODE
CONNECTION
I ,
1 1 VALVE
1
SERVICE/ ,�•.,,
MULTIVALVE �� NAME
_,- PLATE
RELIEF
VALVE
FITTINGS LAYOUT UNDER DOME
All Vessels dimensions are approAG @G VESSEL DIMENSIONAL INFORMATION
WATER OUTSIDE HEAD
OVERALL OVERALL LEG
CAPACITY DIAMETER TYPE
LENGTH HEIGHT LEG -WEIGHT QUANTITY
WIDTH SPACING FULL PER
120 w . 11
454.2 L 24 Blip 5' - 5 13/16° 3' - 0'I 10 1/8 , _ LOAD STAC
609.6 mm "
1671.3mm 911,4 mm 3 0 245 lbs.
250 Wg. 31.511 25712 mm 914.4 mm 96 12
Heml 7' - 2 1/21, 3' - 7 112" 111,1 kg.
946.3 L 800.1 mm 12 3/4" 3' - 6" 472 Ibs, 63 9 .
2197.1 mm 1104.9 mm 323,9 mm 1066,8 mm 214.1 kg,
320 wg, 31,5° Hemi 8' -11 3/4" 3' - 7 1/2'1 500 W . 800.1 mm 2736.9 mm 1104.9 mm 12 3/411 4' - 0 1141, 588 Ibs.
323.9 mm 1225.6 mm 45 g
500 wg, 37.42" Hemi 91.1011 � _ 266,7 kg,
1892.5 L 950.5 mm 4 1 7/16 1511 51.011 2997.2 mm 1255,7 mm 381.D mm 871 Ibs, 30 6
1000 wg. 40.96" Hemi 15' -10 13116" ' . 1524.0 mm 395.1 kg
3785.0 L 1040.4 mm 4 4 5/161, 16 1/411 91.011
4846.E mm 1344.E mm 412.8 mm 2743.2 mm 784,.31729 ika 15 5
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 currentflows 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
whether the locations of the anode/ cathode remain constant over time,
conductivity of the soil promotes the flowCorrosion rates are generally higher in wet soil environments since the
circuit. of DC current in the corrosion
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
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 rotective
coating insulates the steel from the soil environment, thus preven ( g
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 currentto 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.
Now Sacrificial Cathodic Protection Worics
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 1 to 1.25Vvolts 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 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'Ib.
APPlication Recommendations
Magnesium anodes can protect underground tanks in most soil
conditions. The H-1 alloy is generally very effective. The foliowing chart
Provides size and quantity recommendations forvar(ou6 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. Verificat us
tion
of soil resistivity can be performed through soil analysis. Contac
for design recommendations in locations where soil resistivit(es 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 galvanic couple that will accelerate
corrosion of the steel tank when directly connected to copper piping.
Generally, copper piping does not require cathodic protection.
i
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: Insertthe blacktest 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 %z 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.
Cautlon: Do not allow electrgde to contact oil, road salts, or other
substances that may contaminate the solution by absor
through porous plug. Do not allow electrode to freeze_ ption
1
Soil Type
Fertile Soils, clay,—
Sand, Gravel, Rocky
Sandy Loam
Areas
Tank Cap.
5 to 5000 ohm -cm
5000 to 10000 ohm -cm
Size Qty. ' Alloy
Size
Q ty I
Alloy
120
9# 1 H-1
9#
1
H-1
150
9# 1 H-1
9#
1
H-1
250
325
9#'" 1 H-1
90 ' 1
9#
500
H-1
17# 1 H-1
9#
9#
2
2
H-1
H-1
1000
IN 2 H-1
9#
4
H-1
1500
14 2 H-1
9#
4
H-i
2000
IN 3 H-1
g#
(i
H-1
''Based on 90% effective external and 30-
coating, 2 ma/fi2 current density, 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.
1 anode 2 anodes 4 anodes
D"
4-Anodes are shipped In either cardboard boxes or multi -wall
papersacks. Remove outer container and 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.
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.
Cirdeirinvg Bnfformation
* Maximum flow based on inlet pressure 20 PSIG higher than the regulator setting and delivery Pressure
2 a heVe'u Vv
selling and delivery pressure 20% lower than the setting, ry pressure 2D /, 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.
21'aiea'ing pIMffoirmatu®n
use
d
When d for libel stage pressure control, must either incorporate integral relief valve or separate relief valve should be specked in accordance
with use Pamphlet 58.
Maximum flow based on Inlet pressure 20 PSIG higher than the regulator setting and delivery pressure 20% lower than the salting.
Designed to reduce first stage pressure of 5 to 20 PSIG down to burner pressure, normally 11" w.c.
Ideal for medium commercial installations, multiple cylinder Installations and normal domestic loads.
Ordering inffoirmatl(ol nn
The LV34038R Back Mount Regulator is designed to reduce first stage pressure of 5-10 PSIG down to
requirements up to 450,000 BTU/hr. and are ideal for homes,
burner pressure normally 11 hh w.c. Designed as a second stage regulator for smaller applications with flow
mobile homes, and cottages.
Ordering onff®lrmato®a�
* Maximum flow based on 10 PSIG inlet and 9" w.c, delivery pressure.
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