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I IN,0 1 8 I 1,IN 10 RPCM Technology Overview Measurement Operation 7 Sample 2 3 Reference 6 4 6 4 5 5 7 Ring Pair Data 1 8 2 Sector Metal Loss 3 (nm) I OUT,0 I 1,OUT • Sample and Reference Rings are in series with one another and a controlled current source. • Each Ring Pair operates independently from other Ring Pairs (allows redundancy). • For each measurement cycle, current is injected in Mode 0 (4sec), then switched to Mode 1 (4 sec). • Total measurement cycle is approximately 10 seconds. • Real time calculation of Metal Loss per sector 1 2 3 4 5 6 7 8 Average Ref Temp (degC)
RPCM Technology Overview Ring Pair Configurations Ring Pair Type Corrosion Type General Welded “Uniform”, TOL, Mesa, Pitting Preferential Weld CRA (e.g. Duplex) Pre-Pitted High Sensitivity Redundant Pitting Pitting / Crevice All All • Corrosion mechanisms measured by changing geometry and ring material • 2-4 RPs is the ‘standard’ configuration but more possible. • Typical Config: 4 RPs, 2 General, 2 Welded 11
Page 1 and 2: Measuring Circumferential Metal Los
Page 3 and 4: Introduction to Corrosion Monitorin
Page 5 and 6: RPCM Technology Overview Electrical
Page 7 and 8: RPCM Technology Overview Key Attrib
Page 9: RPCM Technology Overview Ring Pair
Page 13 and 14: Measurement Performance The Importa
Page 15 and 16: Case Study CoP Judy Jade North Sea
Page 17 and 18: Conclusions • RPCMs have extensiv

Teledyne - Subsea UK

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