Valve repaired on-line
A
Furmanite International product story
Edited by the Engineeringtalk editorial team
Oct 22, 2007
Furmanite applied its Trevitest technology to adjust the spring tension and reseat the PSV valve, after which the valve reverted to normal opening and closing functions..
Furmanite has helped Saudi Yanbu Petrochemical company to avoid downtime when a safety relief valve began malfunctioning.
Furmanite was called in by Yanpet when the PSV valve on a turbine extraction line header was found to have popped at 2280kPa and was not closing properly, despite dropping the line pressure.
In conjunction with Yanpet, Furmanite carried out a job safety analysis, identifying potential causes of the problem (including incorrect blowdown settings, a trapped particle between disc and seat and a loss of spring tension) and discussing and recording the necessary courses of action and corresponding safety measures for each scenario in detail.
An isolation method to enable this steam line PSV valve to be replaced would have taken time, with the valve remaining open in the meantime, resulting in high noise pollution, loss of production and a risk of damage to other parts due to the excessive vibration caused.
Instead, Furmanite's Trevitest on-line valve testing was used.
Following trials to confirm the problem, Furmanite applied its Trevitest technology to adjust the spring tension and reseat the PSV valve, after which the valve reverted to normal opening and closing functions.
A final on-line test using Trevitest was undertaken for certification.
Yanpet Instrument Engineer (Core Maintenance) Suchithran Makutty said: "We appreciate the safe and successful job execution at Yanpet".
"The experience and expertise of the Furmanite team enabled us to avoid an unnecessary unit shutdown".
Furmanite Middle East Manager Khairy Ahmed added: "This is typical of the advantages we're able to offer through our range of on-line and on-site services and technologies, backed by high technical and safety standards, to help operators maximise asset uptime and keep their assets earning and operating efficiently".
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