Safety engineering is, as a major part of our planning services, is essential for the, in terms of working conditions, safety and coincidence prevention, long-range success of our projects.
Preventive fire precautions do not only reduces the risk of fire in a plant but also has a considerable impact on the success of the fire brigade in case of fire. In the course of the VEXAT document, which is the Austrian regulation on potentially explosive atmospheres, an alarm plan and a fire emergency plan, which states the precise instructions in case of fire, have to be posted visible at every facility. Those plans are also discussed with the local fire brigade in order to prevent misunderstandings.
The VEXAT, which was enacted due to $5 of the Labour protection act states that an employer is obligated to identify and evaluate explosion risks, to document these risks in an explosion protection document and to update this document regularly. For instance operators of sewage purification and biogas plants have to prepare a VEXAT document. After the collection of necessary data of a plant the author of the VEXAT document identifies and states the Ex-zones in an Ex-zone plan, which is added to the VEXAT document.
Additionally the operators of plants receive instructions for the VEXAT document. Also the defects of a plant are discussed during this instruction and an optimal solution for these defects is retained.
With the help of a safety analysis all relevant risks coming from a facility site can be detected. For smaller plants there is the possibility of using a checklist method whereas for larger plants according to their risk potential it can be necessary to apply the PAAG method.
Safety analysis with the help of checklists
When applying this method the facility site is first separated into plant sections which are divided in relevant or not relevant under the aspect of safety. For every relevant plant section significant risks are determined based on field-tested checklists with general sources of danger.
Safety analysis with the help of PAAG method
For specifying procedural plants the PAAG method, which has been developed for chemical plants, is more adequate. Its method was developed by the Chemistry of the International Social Security Association (ISSA) for Germany based on the English HAZOP technique, which stands for Hazard and operability studies. PAAG being a German method means it is a German abbreviation.
The plant sections have to be united to PAAG compatible sub-systems to be able to carry out the PAAG safety analysis. For these sub-systems it is necessary to define reference values and to evaluate the security relevance.