Technology saves Saudi petrochem plant shutdown
Posted: 18 October 2007
Specialist expertise and experience from Furmanite helped Saudi Yanbu Petrochemical Company (Yanpet) – one of the world’s largest petrochemical facilities – avoid a unit shutdown.
A malfunctioning safety relief valve was successfully repaired on-line, without disrupting production.
Furmanite was awarded a certificate of appreciation for its performance and quality of service.
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.
"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," said Khairy Ahmed, Furmanite Middle East manager.
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.
"We appreciate the safe and successful job execution at Yanpet," said Yanpet instrument engineer (core maintenance) Suchithran Makutty.
"The experience and expertise of the Furmanite team enabled us to avoid an unnecessary unit shutdown. Furmanite’s commitment to safety, professionalism and commitment were evident throughout the execution of the project and we look forward to working with the company again in future."
The Yanpet petrochemical complex in Madinat Yanbu Al-Sinaiyah, Saudi Arabia, is a 50-50 joint venture between Sabic and ExxonMobil. It produces more than 1.6 million tonnes of ethylene and more than 2 million tonnes of derivative products annually.