Inerting of pipelines containing vapors of complex hydrocarbon mixtures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00007064%3AK02__%2F18%3AN0000037" target="_blank" >RIV/00007064:K02__/18:N0000037 - isvavai.cz</a>

Result on the web

<a href="http://www.ishpmie2018.com" target="_blank" >http://www.ishpmie2018.com</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Inerting of pipelines containing vapors of complex hydrocarbon mixtures

Original language description

Purging of pipelines using air before repairs and maintenance work presents a major risk as a mixture of hydrocarbons with air is created. Determination of dangerous hydrocarbon concentration range is straightforward for simple mixtures of gaseous hydrocarbons, e.g. natural gas, with air. To determine the explosive concentration range for complicated mixtures of volatile hydrocarbons such as vapors of crude oil or petroleum products present a challenging task. If flammable vapors are formed by evaporation of liquid, the actual flammable mixture composition is based on vapor-liquid equilibrium and thus depends on temperature and pressure, as well as on initial gas – liquid ratio. To avoid fire hazard in case of purging pipelines used for transportation of flammable liquids, inert gases are used instead of air. Pure nitrogen can be used, however a gas mixture with high content of nitrogen represents an advantageous option from the economic point of view. Such mixtures can be prepared on site and thus transportation and production cost of the inert gas can be cut. The safe residual concentration of air (or oxygen) in an inerting mixture should be determined. To determine the content of nitrogen in an inerting media, at which the formation of flammable mixture with hydrocarbon vapors is avoided, set of explosion tests were carried out using 10 L spherical steel vessel at varied pressure and volatile hydrocarbon concentrations. Based on the results, the efficiency of the on-site inert gas generators was assessed using the residual amount of oxygen in the inert gas as the main parameter.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the Twelfth International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (XII ISHPMIE), Kansas City, MO, August 12‐17, 2018

ISBN

978-1-5323-8443-1

ISSN

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e-ISSN

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Number of pages

11

Pages from-to

1025-1035

Publisher name

Published by Fike Corporation

Place of publication

Blue Springs, MO, USA

Event location

Kansas City USA

Event date

Aug 12, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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