Corrosion Control in Distribution Pipes - Ohiowater.org
Corrosion Control in Distribution Pipes - Ohiowater.org Corrosion Control in Distribution Pipes - Ohiowater.org
Investigative Structure (Existing)Corrosion Assessment• Review of General Characteristicsof Water System- Age- Material Type- Wall Thickness- Construction Practices• Review Break / Leak History• Field Survey- Soil Conditions (Resistivity,Moisture Content, ChemicalAnalysis)- Electrical Test• Data Analysis & Risk Management• Priority Index (Identification ofOpportunities to ReduceReplacement / Repair Costs)
Insituform
- Page 8: Water(Electrolyte)Anodic Area(Corro
- Page 11 and 12: Cast (Grey) IronFailuresGraphitizat
- Page 13 and 14: Ductile IronPitting (concentrated)c
- Page 15 and 16: PRACTICAL GALVANIC SERIESMaterialPo
- Page 17 and 18: Copper Service Connections
- Page 19 and 20: Water Wells
- Page 21 and 22: Gate Valve Corrosion
- Page 23 and 24: Corrosion Caused by DifferentialAer
- Page 25 and 26: Impressed Current CP System on Oil/
- Page 27 and 28: Stray Current
- Page 29 and 30: Computerized Potential Logging Surv
- Page 31 and 32: Polyethylene Encasement- Follow man
- Page 33 and 34: Galvanic Anode on PolyethyleneEncas
- Page 35 and 36: Cathode(Protected)Anode
- Page 37 and 38: Thermit Weld to Pipe
- Page 39 and 40: Access to Pipe
- Page 41 and 42: Temporary Fix ?
- Page 43 and 44: Water Leak Repair KitIncludes:Insta
- Page 45 and 46: Cathodic Protection of Metallic Fit
- Page 47 and 48: Meter Vaults(Keep dry if possible)
- Page 49 and 50: For New or Refurbished Tanks
- Page 51 and 52: Horizontally Submerged Cathodic Pro
- Page 53 and 54: Corrosion of Clarifier Center Well
- Page 55: Depleted & Refurbished CathodicProt
- Page 60 and 61: TrafficDisruptionsWater LossFirePro
- Page 62 and 63: Design Decision ModelFor Ductile Ir
- Page 64 and 65: Computerized Potential Logging Surv
- Page 66 and 67: Vertically Suspended High Silicon C
- Page 68: Design Decision ModelFor Ductile Ir
- Page 71 and 72: The estimated annual cost to repair
- Page 73 and 74: New PipingPHASE I- Obtain drawings
- Page 75 and 76: Lower Stress Area(Cathode)PipeThrea
- Page 77 and 78: Insituform
- Page 80 and 81: Factory Installed Cathodic Protecti
- Page 82 and 83: Corrosion Control for WaterSystem P
- Page 84 and 85: Annual Cathodic Protection Survey
- Page 87 and 88: Corrosion is the leading contributo
- Page 89 and 90: Inspection of CP System
- Page 91 and 92: Structures- Piping (Distribution/Tr
- Page 96 and 97: History of Iron PipeCast Iron- Intr
- Page 98 and 99: CARBON ROD(CATHODE)+0.30mVWIRE(COND
- Page 100 and 101: Corrosion of iron when coupled to c
- Page 102 and 103: Dissimilar Surface ConditionsPipe(C
- Page 105 and 106: CP Benefits: - Triple life of coati
- Page 107 and 108: Coating Flaws (Holidays)
Investigative Structure (Exist<strong>in</strong>g)<strong>Corrosion</strong> Assessment• Review of General Characteristicsof Water System- Age- Material Type- Wall Thickness- Construction Practices• Review Break / Leak History• Field Survey- Soil Conditions (Resistivity,Moisture Content, ChemicalAnalysis)- Electrical Test• Data Analysis & Risk Management• Priority Index (Identification ofOpportunities to ReduceReplacement / Repair Costs)
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