Incident Summary
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lyondellbasell.com 1 Incident Summary Two contractors were fatally injured while reinjecting sealant into a leak box on the bonnet-to-body flange of a 16 inch motorized valve in high pressure boiler feedwater service when suddenly the studs of the flange failed. The bonnet was launched into the process area, and landed at a 25 m (82ft) distance. The root causes are not yet known however an investigation is in progress. This incident serves as a grave reminder of the potential hazards when working on live pressurized equipment. More information and reference materials are included on page 2 of this Alert. Description Key Points of Consideration for Your Site: Stop: Whenever working on live pressurized equipment take the time to ensure appropriate personnel have assessed all plausible failure modes and other inherent process and occupational risks. Although the OE work process for working on live equipment does not currently address leak containment devices, it does provide good examples of the necessary considerations. Caution: If there is a need to re-inject a full encirclement leak containment device on a set of flanges, evaluate the safety risks that may result from leakage or total separation. There are several options for external clamping to prevent total separation. Go: Ensure that your site is tracking the installation, modification and removal of all leak containment devices (including valve bonnet flanges) that records at least their location, date of installation, type of device and service. Additional guidance is being developed and will be provided once sufficient details are available from the investigation. Location: Total Refinery, Antwerpen Incident Classification: Level 5 Date: Nov. 19, 2013 IMPACT No. N/A Incident Alert: Failed Leak Containment Device Valve Body with missing Bonnet
description
Incident Alert: Failed Leak Containment Device. Incident Summary. Description. Key Points of Consideration for Your Site:. - PowerPoint PPT Presentation
Transcript of Incident Summary
lyondellbasell.com 1
Incident Summary
Two contractors were fatally injured while reinjecting sealant into a leak box on the bonnet-to-body flange of a 16 inch motorized valve in high pressure boiler feedwater service when suddenly the studs of the flange failed. The bonnet was launched into the process area, and landed at a 25 m (82ft) distance. The root causes are not yet known however an investigation is in progress.
This incident serves as a grave reminder of the potential hazards when working on live pressurized equipment.
More information and reference materials are included on page 2 of this Alert.
Description Key Points of Consideration for Your Site:Stop: Whenever working on live pressurized equipment take the time to ensure appropriate personnel have assessed all plausible failure modes and other inherent process and occupational risks. Although the OE work process for working on live equipment does not currently address leak containment devices, it does provide good examples of the necessary considerations.
Caution: If there is a need to re-inject a full encirclement leak containment device on a set of flanges, evaluate the safety risks that may result from leakage or total separation. There are several options for external clamping to prevent total separation.
Go: Ensure that your site is tracking the installation, modification and removal of all leak containment devices (including valve bonnet flanges) that records at least their location, date of installation, type of device and service.
Additional guidance is being developed and will be provided once sufficient details are available from the investigation.
Location: Total Refinery, Antwerpen
Incident Classification:
Level 5
Date: Nov. 19, 2013
IMPACT No. N/A
Incident Alert: Failed Leak Containment Device
Valve Body with missing Bonnet
lyondellbasell.com 2
Additional Information and Reference Materials
The preceding information is being shared in the normal course of business for general informational purposes only, and represents a non-comprehensive overview of potentially relevant concerns and/or hazards related to the topic presented. The information provided does not alter any legal requirements, is not intended to replace sound engineering analysis or judgment, and may or may not be relevant to your operations. If you have any questions regarding the information provided, please contact the LyondellBasell Operational Excellence and Process Safety Team.
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Incident Description
