TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Possibilities of Estimating the Amounts of Gas Dissipated in Transport Pipelines
(Posibilităţi de estimare a cantităţilor de gaze disipate din conductele de transport)
Vol LVIII • No. 2/2006
Ion Creţu*, Eugen Mihai Ionescu*, Gheorghe Cristolovean**, Corina Teodorescu***
* Universitatea Petrol ? Gaze din Ploieşti, Bd. Bucureşti 39, Ploieşti
e-mail: ionescu_em@yahoo.com
** Transgaz S.A. Mediaş, Regionala Braşov, Str. Grigore Ureche 12A, Braşov
e-mail: cristolovean.gh@transgaz.ro
*** Universitatea Ovidius, Bd. Mamaia 124, Constanţa, e-mail: cteo@univ-ovidius.ro

 Keywords   hydrocarbon pipelines, fluid losses, flow rate, pipeline inspection.

 Abstract
The fluid losses from the hydrocarbon pipelines ? that occur as a consequence of the fissures or corrosion perforations of the pipe wall ? can be detected by a rigorous balance of the inflows and outflows. This paper deals mainly with an algorithm relative to the calculation of the gas flow rate lost by a fissure situated at a known distance from the pipeline's initial section. For this purpose, the equation governing the gas flow from a tank through an orifice is solved. The case study included here proves that our calculation method is a reasonable procedure for solving this problem.

 Rezumat
Detectarea pierderilor de fluide din conductele de hidrocarburi este posibilă prin ţinerea unei evidenţe stricte a cantităţilor de fluide intrate respectiv ieşite din acestea, utilizând contoare de mare precizie. În lucrarea de faţă este preconizat, în principal, un algoritm relativ la calculul debitului de gaze scurse printr-o fisură a unei conducte de transport, situată la o anumită distanţă faţă de secţiunea iniţială a conductei. În acest scop, se apelează la soluţionarea ecuaţiilor scurgerii gazelor dintr-un recipient printr-un orificiu. Studiul de caz inclus în lucrare atestă faptul că metoda de calcul propusă reprezintă o procedură rezonabilă pentru rezolvarea acestei probleme.



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