ABB Triguard SC300E Safety Manual

Also see for Triguard SC300E: User manual

Contents

ABB Triguard SC300E Safety Manual Manual pdf 39 page image

Issue 5 - September 2006 Page 39 of 657 De-Commissioning7.1 IntroductionAll process plants eventually arrive at the end of their useful operational economic life.Hazardous plants that normally would have a Triguard SC300E Safety Controller in operationsafeguarding the plant must be de-commissioned in a safe and environmentally friendlymanner.Before de-commissioning or disposal activity can occur, an impact analysis shall be carried outto assess the impact on the functional safety of the Triguard SC300E System and any adjacentplant or processes that may still be in operation. The de-commissioning plan must fully take intoaccount the results of this analysis.7.2 Final Process ShutdownThe operation and maintenance of the plant must be fully and professionally manned andmanaged through the de-commissioning period.The final process shutdown initially would emulate all previous major maintenance shutdowns inthe sequence of shutdown operation.Once the plant is in its final safe state, all inflammable and hazardous material must be removedfrom the plant safely and environmentally correctly disposed of or recycled into other operatingplants.A full clean purge sequence must then be operated and the plant must be certified as fully safeby the appropriate authority before power is finally removed from the safety system.7.3 Dismantling and RemovalBefore the dismantling and removal operation can occur the Triguard SC300E System and itsrelated field equipment must be fully electrically isolated.7.3.1 Electronic and Electrical ModulesAll electronic and electrical modules should be removed from the system and the parts removedfrom the site by electrical and electronic disposals/recycling specialists.7.3.2 Mechanical ItemsThe majority of mechanical items will be manufactured of steel and aluminium. These itemsshould be separated and disposed of through the appropriate recycling agency.7.3.3 Safety PrecautionsOn no account should any Triguard SC300E Products or wiring be locally incinerated.