gillnumil ® 28-Сен-2018 11:03

An Introduction to the Design and Maintenance of Cargo System Pressure Relief Valves on Board Gas Carriers


Year: 1998
Language: english
Author: SIGTTO
Genre: Guide
Publisher: Witherby Publishing Group Ltd
Edition: 2nd
ISBN: 1856091635
Format: PDF
Quality: Scanned pages
Pages count: 34
Description: This book was written following an incident in 1992 that involved failure of a relief valve when a semi-pressurised LPG carrier was being loaded. The cargo being loaded was propane, and the pressure relief valves PRVs were set to operate at 11 bar gauge. During the final stages of loading at a pressure of 7 bar gauge, one of the pressure relief valves fitted to a cargo tank failed.
There were no guidelines available on board or at the terminal to provide any assistance in the emergency methods for closing the valve. The valve was eventually blanked off with the tank pressure reduced to 0.02 bar gauge, but by this time a large amount of the product had been lost into the atmosphere. The investigation that followed discovered that there was a failure of the pilot valve diaphragm, possibly due to the diaphragms being in service for too long.
Additional info:The book advises on PRV maintenance and testing, emergency closure, and operating problems and faults. It is a general guide for the ship’s staff and is not designed to replace the manufacturers’ instruction manuals.
The purpose of SIGTTO is to promote shipping and terminal operations for liquefied gases which are safe, environmentally responsible and reliable. To fulfil this mission it will:
-Proactively develop best operating practices and guideline
-Sustain a learning environment by sharing lessons learned
-Promote training and development of all within the industry
-Foster mutually beneficial relationships with regulatory authorities and other stakeholders
-Conduct its business with professionalism and integrity

Contents

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Оценка: 5 / 5 (Голосов: 14)
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