Static L.P.G. tanks, all capacities Double wall tanks for underground installation Tanks for propane service stations Autonomous units for L.P.G. supply Tankers for the supply and transfer of L.P.G. Vaporizers STORAGE AND SUPPLY OF L.P.G. LPG TANKS PRODUCTS FOR L.P.G. ER-0108/1993
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Static L.P.G. tanks, all capacitiesDouble wall tanks for underground installation
Tanks for propane service stationsAutonomous units for L.P.G. supply
Tankers for the supply and transfer of L.P.G.Vaporizers
STORAGE ANDSUPPLY OF L.P.G.
LPG TANKS
PRODUCTS FOR L.P.G.
ER-0108/1993
Eight 207 m3 tanks at a glass factory47 m3 LPG tanker with transfer equipment
LAPESA crane trucks for deliveries of LPG tanks
225 m3 LPG tank
2,300 litres LPG tanks 2,450 litres LPG tank
59 m3 LPG tank
10 m3 LPG tank
118 m3 LPG tank
2,450 litres LPG supply unit for own consumption
Page
PRODUCTION PROGRAMME
11TABLES OF LPG NATURAL VAPORIZATION
CHARACTERISTICS AND DIMENSIONS
• Basic series: 1,200 mm/ 1,500 mm / 1,750 mm diameter. 3
• 2,200 mm and 2,450 mm diameter. 4
• 3,000 mm and 3,500 mm diameter. 6
• Special propane tanks, less than 20 m3 7
• Double-wall polyethylene tanks 8
• Autonomous units for the supply of LPG 9
• Tanks for LPG service stations 10
2
TANKS FOR THE STORAGE OF L.P.G.TANKS TO CONTAIN PROPANE (L.P.G.)
Supply: Tanks of capacities up to 20 m3 include the valve unit equipment , (the most commonly known brands).Valve unit equipment for tanks with capacities of over 20 m3 is supplied under order.Valves mounted: The valve unit is normally supplied separately, dismounted.At the customer’s express request, the tank can be supplied with the valves ready-mounted. This processincludes the tightness test and interior gazing.
VALVES
Cathodic protection: A cathodic protection unit can be supplied for underground tanks to obtain the protectionspecified in the LPG installation regulations. The cathodic protection unit comprises the sacrificial anodesand connection cables with terminals.
PROTECTION
Standard finish: The standard finish of the outer surface offers a high resistance to corrosion. The whole ofthe exterior of the tank undergoes blast treatment. A coat of primer is then applied followed by a top coatin white or black depending on whether the tank is to be installed above or underground. The outer coatis in polyurethane. In the case of tanks with a capacity of more than 60 m3 or a diameter greater than2,450 mm, the standard finish is a primer coat only.
Special finitions: Other types of external surface finition can be carried out, e.g. a “thick coat” of polyurethane(up to 3 mm.) Specific product for underground tanks, with a dielectric resistance of more than 15,000 volts.
FINITION
Models: The catalogue shows the range of models from 2 m3 to 300 m3.Special models: There is also a range of special size tanks (see page 7)Consult us for any special model or version of those that appear in this catalogue.Centred outlets: All of the models can be made with the option of “centred outlets” for situations in whichthere are problems of distances in installations.Gazing: The tank can be supplied with the valve unit already mounted (and tightness checked) and with theinterior air replaced by inert gas.
OPTIONS
Manufactured according to LPG regulations for static tanks and in compliance with European Directive 97/23/CE.All of the models have the EC mark.Permanent stocks of basic models in 1,200 mm, 1,500 mm, and 1,750 mm diameters.
TANKS
Natural vaporization: Tables to quickly determine the tanks natural vaporization capacity. It includes all ofthe standard models, up to a capacity of 60 m3.
Maximum filling up: There is also a useful data table with the heights of the liquefied gas at 85% capacity.
TABLES
The following tolerances, above or below, have been applied to the tank measurements and data indicatedin this catalogue:In total length: 1% Distance between support axes: 10 mm. Distance between holes in same support: 5 mmRest of measurements, according to CODAP F1.5
TOLERANCES
All of the models in diameters of 1,200 mm, 1,500 mm and 1,750 mm can be installed above or underground.The only difference is the colour of the finition and if they have an inspection chamber or cover, depending on whether they are above or underground tanks.
Table of characteristics
G1 dimensions for the option of «centred outlets».*=A, for aboveground tanks.*=E, for underground tanks.
TRIPLE EXTERIOR PROTECTION• Automatic blast treatment• Anti-corrosion primer• White and black finish
I
I
GG1
* Models LP 11E and LP 13E-17 have a rectangular inspection chamber
STATIC TANKS FOR L.P.G1,200 mm, 1,500 mm and 1,750 mm DIAMETER
3
4
Underground tanks: 2,200 mm and 2,450 mm diameter
LARGER THAN 20 m3STATIC TANKS FOR L.P.G.
These models have a different design, depending on whether they are for aboveground or underground installation.The aboveground models have support strips and can be placed directly on a concrete cradle.The underground models have two inspection chambers; one for the valve unit and another for the safety valve manifold and the inspection aperture. Both inspectionchambers are supplied dismounted.
LARGE series models.- The distribution of the elements can be varied according to customers’ requirements.- The type of surface finish must be specified by the client.- If requested, we can supply the valve units, separately from the tank.
A group of officially approved tanks that do not form part of the normal production programme but that can resolve special needs in terms of size or capacity arelisted as a guide for customers.The models with a capacity of less than 20 m3 can be installed above or underground as the only difference is the colour of their finish and if they have an inspectionchamber or cover. Models with a capacity greater than 20 m3 have a different design depending on whether they are for installation above or underground.
Table of characteristics
Fold-down cover for aboveground tank
Inspection chamber with lift-upfor underground tank
Distribution of outlets (with Magnetel level)600G
B
A
Drain 1-1/4”NPT
D93
J
K
Earthconnectionhole ø12
2 holes ø30
I
TRIPLE EXTERNAL PROTECTION• Automatic blast treatment• Anti-corrosion primer• Black or white finish
* = A , for aboveground tanks.* = E , for underground tanks.
SPECIAL TANKS LESS THAN 20 m3 2,200 mm and 2,450 mm diametersSTATIC TANKS FOR L.P.G.
8
DOUBLE-WALL, POLYETHYLENE TANKS FOR STORAGE OF L.P.G. UNDERGROUNDSTATIC TANKS FOR L.P.G.
The outer casing is made of tight polyethylene, which guarantees the total insulation of the interior steel tank. A non-metallic outer surface means that there is no possibilityof external corrosion.Between the tank and the double wall a totally tight interstitial zone is formed, in which a vacummeter is created and controlled with a vacuummeter. This condition allowsus to be absolutely sure of the perfect state of the whole surface of the two walls of the tankThe outer wall in high density polyethylene (PEAD) is extraordinarily stable, dielectric and semi-rigid, allowing the equipment to absorb vibrations in the same way as theinner tank made of steel with a high elastic limit, is able to withstand the characteristic loads exerted by the terrain.Due to the aforementioned characteristics the tank does not require cathodic protection.Equipment with EC mark, in accordance with the European Pressure Equipment Directive, 97/23/CE.
LAPESA has a whole range of leak detectionequipment to check the correct state of thetank surface.
DIMENSIONS FOR INNER TANK: see page 4(Capacities available: 2,450 litres, 4000 litres, 6650 litres and 8334 litres)
ø 12
00 (I
nner
tank
)
ø 12
27
1605
Stainless steel inspectionchamber Pressurised inner tank (Steel)
Polyurethane casing
Length of tank + 20 mm.Slab and holding down straps(optional)
(it is sufficient to hold downtank in the event of flotation)
LAYOUT OF OUTLETS ONUPPER GENERATRIX
Chamber vacuum1/2”GAS vacuummeter
Multi-valve3/4”NPT
filling1–1/4”NPT
safety1–1/4”NPT
Vacuum chamber shutoff cock1/2”GAS
Magnetic level
Liquid phase3/4”NPT
Drain3/4”NPT
9
AUTONOMOUS UNITS FOR THE SUPPLY OF L.P.G.STATIC TANKS FOR L.P.G.
Tanks that include supply units.For service stations, installations for own consumption…
Options (consult LAPESA)• With L.P.G. pumps of different capacities.• With L.P.G. pump nozzles (with meter)• With pump columns (in installations for own consumption)
• With steel support frame• Transportable (unloaded)• Officially approved according to European directives.
DIAGRAM OF AUTONOMOUS UNIT FOR OWN CONSUMPTION
Support frame
Filter
Outlet to pump nozzle
Return
Drain
Manometer
Safety
LPG pump
Reversible cover Pump column
FOR L.P.G. SERVICE STATIONSSTATIC TANKS FOR L.P.G.
Main characteristics:• The submersible pump is fitted inside the tank.• The pump can be removed from the manifold in which it is housed to carry out any work or maintenance on it, without having to empty the gas from the tank.• The submersible pump always operates in a loaded state. There is no risk of de-priming.• Full equipment with EC mark, in accordance with the European Pressure Equipment Directive, 97/23/CE.
With a submersible pump
In the case of underground tanks, the submersible pump reduces installation costs considerably. If conventional external pumps are used, extensive civil works are necessary(by local regulation) to allow for a pump room below the lower generatrix line of the tank so that the pump is always loaded with liquid LPG.
10
ø Ta
nk72
5
LPG outlet
Manifold
Unit wiring
LPG tank Input to pump Pump
The drawing shows an underground tank with a surface pump at a service station
Main characteristics:• Static, above or underground tanks, for vehicle supply.
With a surface pump
GAS SEPARATOR
SURFACEPUMP
Return
Retorno
11
TABLES OF NATURAL VAPORISATION IN L.P.G TANKSSTATIC TANKS FOR L.P.G.
The values provided in the tables are calculated for the tank filled to 20%.
* = A, Aboveground * = E, Underground
Undergroundtanks
Undergroundtanks
NATURAL VAPORISATION FLOW (Kg OF PROPANE PER HOUR)
Aboveground tanksLapesaModel(Ref.)
Capac.(litres)
Diameter(mm)
Surface area(m2) Minim ext. temperature (°C)
Aboveground tanksMinim ext. temperature (°C)
-10 -5 0 5 10 -10 -5 0 5 10
Working pressure: 1’25 bar Working pressure: 1’50 bar
The natural vaporisation of a propane tank can be obtained by the expression: D = aSK (Te-Ti)/q
where D is the capacity of vaporization of propane in kg/h. (See end of table for data used in the formula)
The following tables show the vaporization flow for LAPESA models at different working pressures.
12
The values used to prepare these tables are as follows:a= Percentage of the surface area of the tank which is in contact with the
liquid. This depends on the tank filling percentage.
Filling percentage 20% 30%
a: 0,336 0,397
S= Surface area of tank in m2.K= Coefficient of heat exchange with exterior. It depends on several factors.K= 12 kcal/Hm2ºC (In underground tanks this value is reduced by 30%)
Te= Minimum temperature of environment in which the tank is installed(5º for underground tanks)
Ti= Propane liquid-gas equilibrium temperature. This depends on the type of mix. Several values have been taken:
Mains pressure: 1,25 1,5 1,75 2
Interior temperature: -26 -22 -20 -17
q= Latent heat of propane vaporization. A value of q=94 kcal./kg canbe used.
* = A, Aboveground * = E, Underground
TABLES OF NATURAL VAPORISATION IN L.P.G. TANKSSTATIC TANKS FOR L.P.G.
NATURAL VAPORISATION FLOW (Kg OF PROPANE PER HOUR)