Working with TLV Ltd, TWI undertook an RBI study on a naphtha hydrotreating unit. The objectives of the study were to optimise equipment inspection plans and identify suitable mitigation measures to reduce the risk of failure. The RISKWISE TM model converts failure likelihood to a remaining life indicator (RLI) which is the basis for an inspection interval.
The results of the NMOC study demonstrated the potential for incremental run length extension after selected equipment modifications. It also highlighted the scope for reduced shutdown inspection effort on a significant number of items, as well as suitable and cost-effective risk mitigation actions.
The software is very easy to use, so special training is not required. It demonstrates the integrity of the plant using an advanced maintenance system. RISKWISE TM addresses not just those damage mechanisms known to be dominant in causing failure but also other damage mechanisms which may become active.
The key features of RISKWISE TM include its:
- user-friendly implementation process (relative to other RBI systems)
- unique reliability-rule based evaluation to derive safe inspection intervals
- risk mitigation module which allows users to assess a range of risk management actions to meet inspection interval targets
TLV Co. Ltd is TWI's RBI technology partner in Japan. For more information about RISKWISE TM , please contact TWI at: riskwise@twi.co.uk