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Atex Introductie

Atex Introductie. Clemens Duyvesteijn ExxonMobil Chemical / Refining. electrical equipment. In zone 0 + 1 check marking. Unchanged area classification. VVI issued after inspection. review mainte-nance manage ment system (all zones). Δ H A C (substantial modi fication ATEX 137).

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Atex Introductie

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  1. Atex Introductie Clemens Duyvesteijn ExxonMobil Chemical / Refining

  2. electrical equipment In zone 0 + 1 check marking Unchanged area classification VVI issued after inspection review mainte-nance manage ment system (all zones) Δ H A C (substantial modi fication ATEX 137) New classified areas (NGG zone) Review against CENELEC / ATEX 95 standards Substantial modification V V I s In zone 0,1 resp 20,21 immediate replacement areas w/changed classification (zone, T, group) modifications possible V V I s In zone 2, 22 immediate check

  3. zone 0 + 1 zone 20 + 21 FMEAs based on EN 1127 and failure mode heuristic V V I s H A C FMEA for IIC Immediate Check V V I s zone 2 zone 22 Generic IHAs for II A,B + T6 Check during maintenance V V I s Non-electrical equipment

  4. z o n e 0 becomes a temporary workplace J S A + foreseeable malfunctions no V V I ATEX Expert I Temporary EPD A V I z o n e 1 + 2 review of spec + working / maintenance instructions against intended use by an Expert I no V V I E P D Portable equipment

  5. Ignition Sources Hot surfaces Flames and hot gases Mechanically generated sparks Stray Electrical currents Static electricity Lightning Radio frequency (RF) Ignition Ultrasonic Adiabatic compression and shock waves Exothermic reactions (incl. self ignition of dusts) ATEX 137

  6. Apparatuur indeling volgens OREDA • Machinerie • Elektrische apparatuur • Mechanische apparatuur • Instrumentatie en beveiliging

  7. Generiek Machinerie volgens OREDA (zone 2) • Soort ExxonMobil typical % • Compressoren Reciprocating 45 • Gasturbines Stoomturbine 99 • Pompen Centifugaal 66 • Verbrandingsmotoren Gas 91 • Turbo expanders

  8. Generiek Mechanische Apparatuur (zone 2) • Warmtewisselaars • Leidingen • Filters • Reactoren • Destilatiekolommen • Tanks

  9. Generieke overige apparatuur (zone 2) • Afsluiters • Mixers • Centrifuges • Hulpsystemen (voor pompen, compressoren etc)

  10. Belangrijkste resultaten voor zone 2 equipment • Nader onderzoek voor hete oppervlakken • Confirm that diesel driven pumps are located in a Non Hazardous Area • Anti static belts used to replace current belts. Confirm all belts are alredy replaced by anti-static type. • LP steam used for tracing. Electrical tracing is Ex certified

  11. Specific Ignition Hazard Assessment • ROP 4 Items • RAP 8 Items • RAF 25 Items • Mainly pumps in confined spaces(Waste Water Treatment Plant)

  12. Specific IHA Procedure • Collect data (BOM)

  13. Identify Ignition sources

  14. Identify Faulures

  15. Evaluate Likelihood and Duration

  16. Determine suitable zone

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