LPG Technical Proposal

7/29/2019 LPG Technical Proposal

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PROPOSAL FOR DESIGN AND DEVELOPMENT OF

CENTRALISED LIQUEFIED PETROLEUM GAS

(LPG) STORAGE AND RETICULATION SYSTEM.

INTEGRAL ESTATE-FACILITY UTILITY SYSTEM INVOLVING SAFE

STORAGE, DISTRIBUTION, AND METERED SALES OF LPG

(DOMESTIC COOKING GAS)

Prepared by STEITOFF DYATT ENGINEERING LTD


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INTRODUCTION AND SYSTEM DESCRIPTION

BACKGROUND

Liquefied Petroleum Gas (LPG), also referred to as cooking gas, is a heavy than airgaseous mixture of combustible gases. Its constituent gases are mainly Propane and

Butane with a little of Pentane and a few other heavy gaseous hydrocarbons. LPG

burns completely in air giving a clean bluish flame producing carbon dioxide and

water vapour. Its use is friendly to the environment and LPG has proven to be an

easy and safer to use domestic energy source.

LPG is a readily available product in towns and cities in Nigeria, it is produced by

NNPC owned refineries and distributed to bottlers and dispensers in tanks,

eventually sold in small cylinders to consumers. Though the use of LPG in Nigeria is

rivalled by that of kerosene, LPG has consistently proven to be a safer and more

easily harnessed cooking energy source. Adulteration of LPG is less probable

compared to kerosene. When stored and used as specified it presents practically no

harm to its users and the environment.

As a step in improving the safety of use of LPG in domestic facilities, LPG storage

should be as remote as reasonable and centralised while only the gas vapours; which

are of lower energy content, are distributed to end users through an engineered pipe

network. Domestic gas consumer reticulation systems have been in use in developed

countries for more than 200 hundred years. Domestic gas networking and

distribution improves on the availability of gas to end users and also improves on

safety and aesthetics of end user facilities as unsightly LPG cylinders are eliminated

from use. Robust safety instrumentation and piping systems are essentials features

built in LPG reticulation systems which serve to prevent unintentional discharge of

gas to the environment or end user facility.

SYSTEM DESCRIPTION

LPG reticulation systems offer the following features:

1. Remote Central Storage2. Leakage detection and management systems3. Localised end user metering; post-paid or prepaid4. Pressure assurance and overpressure protection systems


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The illustration above provides some detail into the minimum an LPG reticulation

system should offer. LPG reticulation has consistently enhanced the service

experience of domestic/residential/commercial facility owners and users as it places

emphasis on quality of service received and not procurement planning or supply

chain of service.

BENEFITS OF LPG RETICULATION SYSTEMS

Some obvious benefits to having a centralised LPG storage system include the

following:

Remote siting of inflammable liquids far from possible sources of ignition Safe and rapid dissipation of explosive atmospheres if accidentally created due

to damage in gas piping

Delivery of gas to consumer locations and not highly volatile flammableliquids. LPG has a higher energy density compared to either gaseous propane

or butane, it also gasifies very rapidly filling drains and low lying areas

The risk of additional damage to property in the event of a fire is eliminated asfuel source is kept out of reach

The aesthetics of buildings/facilities is enhanced as unappealing cylinders,indoors or outdoors, and protection for such from theft are eliminated

Quality control of gas used within an estate is made easier further protectinglives of end users. Burden of identifying and procuring LPG meeting


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appropriate specification is transferred to dedicated estate management

personnel

Centralisation enhances control of movement of flammable and explosivesubstances within estate or facilities.

SCOPE DEFINITION AND DEVELOPMENT

To develop an LPG reticulation system it is required that as-is data of estate/facility

are acquired and studied. LPG reticulation systems are engineered using the most

rigorous engineering procedures and designs are governed by stringent process andsafety codes of engineering practice.

Full cooperation and involvement of all stakeholders in the development of a

customer facility is required; LPG reticulation systems are best suited to residential

estates, high-rise buildings, hotels, catering facilities, laboratory complexes, field

bases, school/college/university facilities, and smaller buildings where safety and/or

aesthetics are of concern.

At the incipient stages of developing an LPG reticulation system for a client, data

under the general headings following will be sought;

Site survey data Basic building plan Architectural drawings Road network design drawings Potable water distribution design drawings User density estimate for entire site Consumption scenarios and consumption estimates Plot plan showing land use plan for entire location Waste management plan or design for site (liquids and solids)


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REFERENCES

For more information on LPG/Gas reticulation systems, their impact on facilities,

and end user experiences, the clients listed below may be consulted1. Santos Field Logistics Base, Roma, Queensland, Australia2. Singapore Parallel Train staff accommodation, Jurong Island, Singapore3. Fawley Refinery Utilities, Fawley, Hampshire, UK

(Projects delivered while working with Foster Wheeler Energy Ltd, Reading)

LPG Technical Proposal

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