anomaly criteria

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QG ANOMALY C Anomaly Code Description AW Anode Wastage BM Bare Metal Exposed BP Buried Pipe CC Corrosion Coat Damage CW Weight Coat Damage CL Clearance CPL Low Cathodic Potential CPH High Cathodic Potential CRG Corrosion General CRP Corrosion Pitting DM Debris – Metallic DN Debris – Non Metallic FS Free Span LK Leak MG Marine Growth on Riser PD Physical Damage RM Relative Movement LI Lack of Integrity OA Other Anomaly OFT Off Track PM Parent Metal Damage VL Variation from last Survey VS WT Wall Thickness Loss Variation from (As Built) Specification

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DESCRIPTION

Anomaly

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Sheet1QG ANOMALY CODE LISTINGAnomaly CodeDescriptionLimitsAWAnode WastageDepletion >50%BMBare Metal ExposedAnyBPBuried Pipe>5m in lengthCCCorrosion Coat DamageAnyCWWeight Coat DamageAnyCLClearanceAny between riser & clamp or pipeline & supportsCPLLow Cathodic PotentialAny < -850mVCPHHigh Cathodic PotentialAny > -1100mVCRGCorrosion GeneralAnyCRPCorrosion PittingDMDebris MetallicAny large, unsecured, abrasive, metallic or hazardousDNDebris Non MetallicFSFree Span>46m (38in PL7)>46m (38in PL8)>40m (42in CCSL)LKLeakAnyMGMarine Growth on RiserAny >50mmPDPhysical DamageAnyRMRelative MovementAnyLILack of IntegrityAnyOAOther AnomalyAny

OFTOff Track>5mPMParent Metal DamageAnyVLVariation from last SurveyAnyVSVariation from (As Built) SpecificationAnyWTWall Thickness LossAny sign of wasting

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