Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ” PC
PFS “Surgil field complex costruction with valuable
components retrieval”
5 POSSIBLE EMERGENCY SITUATIONS ANALYSIS
Emergency is understood as a situation on the industrial enterprise at which raw
materials, intermediate products, production of the enterprise and the production wastes,
installed process equipment on industrial area, being involved in emergency process create
strike factors for the personnel, population, environment and industrial enterprise.
There are possible during emergencies and damages of the process equipment and
pipelines:
- fire hazard;
- explosion;
- electrical shock.
Sources of fire hazard and explosion are formed explosive air-gas mixes.
One of the basic substances participating in technological process (extraction, main
transport and processing) is natural gas. Natural gas is explosive and fire-hazardous
substance and can have toxic impact on a human organism at the raised concentrations
(more than 10 %), have no color and a smell.
There can escape gas condensate from gas in process of drying and processing. Gas
condensate concerns to inflammable liquids with wide fluctuations of the hydrocarbonic
components content.
Except of the specified substances, there is used turbine oil in technological process,
which is combustible, fire-hazardous liquid of oil origin.
Table 21 – Substances explosive and toxic features
Substance Characteristic * ) Inflammability limit in Temperature, о С
mix with air, t.%
lower upper flashes inflammation
Natural gas EX 3.8-5.0 155.0 - 535
Hydrocarbon
condensate
EX
Are defined by actual composition
Turbine oil FH - - 193 390
*)
EX - explosive fire-hazardous substance, FH – fire-hazardous
Origin of the emergencies is possible because of various failure modes:
- technological failure caused by breakdown of manufacture technological
mode or separate technological process;
- mechanical failures caused by partial or full destruction, or deterioration of
the process equipment or separate details;
- technical-organizationalfailures caused by stopping delivery of raw
materials, electric power, personnel errors, etc.;
Volume 2. Part 1. EIS Project for Surgil field construction
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