Fluid transfer is a common industrial operation. However, the incorrect positioning of transfer circuit during such operations, also referred to as poor alignment, is the cause of many accidents. This study, based on 372 events in the ARIA database, presents their characteristics and lessons learnt.
Mobile acetylene cylinders are present in all sectors of activity owing to their common use on welding machines. Even if they look like risk free, these cylinders are real hazard potential ! Five major accidents in France since the beginning of 2018 drive us to remind to users and owners the risks associated to these cylinders.
A degraded situation is merely an initial phase that could lead to an accident with serious consequences. “Operating in a degraded mode” refers to a condition during which operations are ongoing despite there being no access to all necessary or normally expected functional resources upon completion of the corresponding risk analysis, whether such resources are organisational or technical.
This fact sheet describes the main lessons learnt in pursuit of effectively evaluating risks under degraded operating conditions.
Repair, maintenance shutdown, adjustment of phase, often require the shutdown and restart of gas-powered installations. This procedure is frequently time consuming to implement, depending on the type of equipment considered (superheater, steam generator), and it can generate accidents. The following fact sheet analyzes some notable incidents in order to draw lessons from them.
Date of the document: November 2011
This fact sheet is the analysis of some accidents that illustrate the risks associated with the operation of installations in degraded mode (unavailability of equipment, utility, personnel ...). These degraded operating situations can arise from material failures, but also from organizational and human failures. In order to avoid accidents, and in the absence of being able to avoid degraded operation by appropriate arrangements, a specific road plan must be defined to carry on operations under a safety level equivalent to the reference.
The accidentology during phases of work, be it maintenance, modification, installation or even dismantling of installations have been regularly mentioned and studied. This is due to the seriousness of this type of events, particularly in terms of human consequences. Focus on some relevant events.
Date of the document: June 2013.
We need to pay special attention to the circumstances under which accidents in silos storing plant products take place. Experience shows that the frequency of accidents is far higher during the working phase including the preventive or curative maintenance, change, assembly or disassembly of facilities. This is also true for both staff technicians carrying out operations in the silo and subcontractors working in a sector where the risks are often underestimated.