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Detalles Bibliográficos
Autor principal:	Oswaldo Adame
Formato:	Artículo científico
Lenguaje:	es
Publicado:	Universidad Libre 2009
Materias:	Ingeniería falla ECDA región
Acceso en línea:	https://www.redalyc.org/articulo.oa?id=757979588003
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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METODOLOGÍA PARA EVALUACIÓN DE OLEODUCTOS APLICADO A CORROSIÓN EXTERNA Oswaldo Adame Enrique Vera Ingeniería falla falla falla ECDA región ECDA región Se presenta una metodología para evaluación y valoración del riesgo por corrosión en oleoductos aplicada al aseguramiento de la corrosión externa. Para asegurar una operación segura en este tipo de tuberías se desarrolló un módulo en una herramienta computacional que facilita la administración, análisis y evaluación de toda la información de la tubería para determinar la probabilidad de fallas y sus posibles consecuencias. Como primera etapa se evalúa el riesgo procesando la información existente y mediante una metodología de probada eficacia se establecen índices de riesgo y consecuencia de falla, cuyo resultado para ser claramente es representado en una matriz de riesgo. Seguidamente y con el fin de conocer la severidad de la corrosión externa, se valora la integridad de la tubería utilizando el modelo de aseguramiento de la corrosión externa ECDA. Para validar la metodología y la herramienta desarrollada, se realizó la evaluación del riesgo por corrosión externa al Oleoducto del Alto Magdalena (OAM). 2009 artículo científico 2619-6581 https://www.redalyc.org/articulo.oa?id=757979588003 es http://www.redalyc.org/revista.oa?id=7579 Avances application/pdf Universidad Libre Avances (Colombia) Num.11 Vol.1

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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