Temet for Risk Consultant

Temet is the technology leader and manufacturer of blast protection products. Let us know your worries and we will see if we can support you in solving your customer´s problems in an innovative way. Besides giving you reliable consultation on the products, your needs and challenges work as a guiding light in our work to offer new products and services.

Simulation programs e.g. BEAST and SDBES and designing manuals e.g. UFC and ASME focus on structural engineering. Little or no guidance is given for product choices in blast protection. Products are still needed to protect openings such as ventilation openings. Openings easily become the weak point compromising the integrity of blast proof building if not enough attention is given or false product criteria is utilized.

  • Temet secures right execution of the outcome of your risk analysis. The analysis work doesn´t go to waste. Ask Temet for joint consultation visits during analysis phase to supplement your customer service.

Credibility to Layers of Protection Analysis

For a given scenario, only one layer must work successfully for the consequence to be prevented. However, since no layer is perfectly effective, as seen for example in Buncefield Oil Storage Terminal explosion in United Kingdom in 2005, additional protection layers must be provided to render the tolerable risk.

Blast proofing of a building can be one effective passive safety layer. When conducted using high performance blast protection products, it can allow lower requirements for other safety layers resulting in cost savings. High explosion overpressure, long impulse duration and multiple explosions resistance give safety and minimal risk of failure in nearly all possible scenarios.

LOPA method states following.  In order to be considered an independent protection layer (IPL), a device, system, or action must be:

  • effective in preventing the consequence when functioning as designed
  • independent of the initiating event and the components of any other IPL already claimed by the same scenario
  • auditable; the assumed effectiveness in terms of consequence prevention and probability of failure on demand (PFD) must be capable of validation (by documentation, review, testing, etc.)

The key to verify the function of blast proofing as IPL is validation of products by testing with correct criteria. If inadequate protective products for ventilation openings and other openings are chosen, the independent safety layer is not preventing the consequence as originally planned and evaluated.

Benefits and Possibilities of High Performance

Solutions have been available to make the walls and other structural elements to withstand high long duration blast overpressures. Often the limiting factor has been the blast proofing of the openings. Lack of products able to fill the requirements mentioned earlier and offer protection for peak values of over 0.3 bar (4.4 Psi) with long duration have led designers and risk consultants to try and cope with blast overpressure risk by layout modifications and other mitigation methods. Common approach is to locate the critical buildings as far away as possible from potential source of explosion. There are downsides to this and other mitigation methods. Sometimes most suitable and cost effective solution would be to blast proof the building for over 0.3 bar overpressures.

High performance blast protection yields benefits and opens new possibilities

  • It increases flexibility in plant layout design. No longer is there designing limitation of 0.3 bar accidental blast overpressure dictating layout design. It also yields cost savings. Focus can be put on designing the daily work easier at the plant. Cost of wiring, piping and other connecting elements as well as cost of land is lower as buildings can be build closer to each other and potential explosion source.
  • Estimation risk can be minimized. Estimation of gas explosion overpressures is difficult due to large number of variables affecting its original strength and propagation and reflection patterns. Safety studies give an estimation but uncertainty remains. Product choices exceeding minimum requirements decrease the risk involved in accuracy of estimation.
  • Protection against reflections and multiple explosions makes possible constructing buildings close to each other as reflections are no longer a risk. Functions are also safe even in major incidents where domino effect of multiple explosions often happens.
  • High performance blast protection prevents escalation by giving possibility to adequately blast proof a critical function e.g. supply of power or emergency function that needs to be in immediate proximity of potential explosion source. 
  • With good blast proofing restricted access areas can be smaller as personnel is safe and possibilities for different evacuation and emergency procedures increase.