corrosion inspection & repair solutions for water systems
TRANSCRIPT
![Page 1: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/1.jpg)
Corrosion Inspection & Repair Solutions for Water Systems
®
Presented By:Presented By:James T LaryJames T LaryCorrpro Corrpro 1055 W. Smith Road1055 W. Smith RoadMedina, OH 44256Medina, OH 44256Tel. 330Tel. 330--241241--66156615email: email: [email protected]@corrpro.comhttp://http://www.corrpro.comwww.corrpro.com
![Page 2: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/2.jpg)
CorrosionCorrosion
![Page 3: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/3.jpg)
Temporary Fix ?Temporary Fix ?
![Page 4: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/4.jpg)
IRON OXIDE REFINING MILLING
IRON,STEEL,PCCP CORROSION IRON OXIDE
Corrosion - A Natural Process
![Page 5: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/5.jpg)
CorrosionCorrosion ofof MetallicMetallic StructureStructure
![Page 6: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/6.jpg)
History of Iron Pipe
Cast Iron - Introduced to North America
during the 1800’s.- Statically cast process produced
a thick walled, heavy pipe.
Ductile Iron- Introduced in 1955 as an improvement to cast iron.
- Centrifugal casting process produces a thinner walled, lighter pipe which is stronger and more ductile than cast iron.
![Page 7: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/7.jpg)
Actual size of AWWA Specification Thickness Reductions for 36-inch Diameter Cast and Ductile Iron Pipe - 1908 to Present (150 PSI Operating pressure)
1.58 in.
1908 1952 1957 1957 1976 1985 1991 LessCLD CL 150 CL 23 CL 22 CL 3 CL 50 CL 150 TolerancesCI CI 18/40 21/45 DI DI DI
CI CI
1.22 in.0.94 in.
0.87 in.0.58 in.
0.43 in.0.38 in.
0.21 in.
![Page 8: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/8.jpg)
Cast (Grey) Iron Failures
Graphitization leaves pipe brittle and weakened.
![Page 9: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/9.jpg)
Ductile Iron
Pitting (concentrated) corrosion attack on ductile iron pipe.
![Page 10: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/10.jpg)
Adverse Conditions for Metallic PipeAdverse Conditions for Metallic Pipe
-- High Chlorides High Chlorides -- Low Soil/Water ResistivityLow Soil/Water Resistivity-- High SulfatesHigh Sulfates-- Acidic SoilsAcidic Soils-- Wet/Dry FluctuationsWet/Dry Fluctuations-- Bimetallic CouplingsBimetallic Couplings-- Stray Current Interference Stray Current Interference
![Page 11: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/11.jpg)
Cathodic Protection Rectifier
Anode Groundbed
Gas Pipeline
Water Pipeline
(-)
(+)
Current Discharge(Corrosion)
Current Discharge(Corrosion)
Stray Current Due to Impressed Current Cathodic Protection System
![Page 12: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/12.jpg)
Impressed Current CP System on Oil/Gas Lines can Impressed Current CP System on Oil/Gas Lines can Create Stray Current Problem on Water LinesCreate Stray Current Problem on Water Lines
![Page 13: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/13.jpg)
Stray Current
![Page 14: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/14.jpg)
Bonding Across a Bell and Spigot or Slip-joint
Copper wire with direct burial insulation
Thermite brazed connection coated with bitumous compound
![Page 15: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/15.jpg)
Polyethylene EncasementPolyethylene Encasement
-- Follow manufactureFollow manufacture’’s and AWWA recommendations to s and AWWA recommendations to insure proper installation of polyethylene insure proper installation of polyethylene encasement.encasement.
-- In extremely corrosive areas, additional methods (bonding In extremely corrosive areas, additional methods (bonding of joints, of joints, cathodiccathodic protection, may be required).protection, may be required).
![Page 16: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/16.jpg)
Inspector name_________ Date____ Address of pipeline inspection ________________ Leak? Yes____ No____ File Number:_____________
1) Type of Pipe: cast iron_____ ductile iron____ carbon steel___ copper______ carbon steel_____ non metallic_____ other____
2) Diameter of pipe _____” Pipeline Name_________ Service Type: Water____ Wastewater____ Estimated date of pipe installation______ Depth of pipe______’
3) Type of Pipe: Distribution____ Transmission____ Service_____ Hydrant _____ Mechanical joint_____ Fasteners_____ Other____ Unknown____
4) Type of Coating: Polyethylene Encased____ Shop applied coating___ No Coating____ Tape Wrap____ Unable to determine____
5) External Pipe Condition: Very Good____ Good____ Poor____ comments:____________________________________________________________________
___________________________________________________________________________________________________________________________________________
6) Is corrosion pitting evident? ____ Yes ____ No Number of Pits______ Typical Size of Pits______ Quantity of pits:______
7) Is graphitization evident (longitudinal or circumferential breaks) ____Yes ____ No
8) Is the pipe installed in (check off appropriate items): Industrial area____ Residential area____ Rural area____ Near street or road ____ Near creek or waterway ____ In reclaimed land___ Near oil or gas pipelines____ Near high voltage lines ____.
8) Describe soil conditions where inspection occurred: wet____ dry____ clay soil ____ rocky soil____ cinders ____ other____________________
9) Where soil samples obtained, sealed and analyzed for chlorides, moisture content, pH, sulfides, resistivity? If yes results were: _____________________________
10) Were previous repairs made on the pipeline (leak clamps, etc) Yes____ No ____. Was new pipe installed____ Yes ____ No.
11) Was a repair clamp installed on the pipe during inspection ___ Yes ___ No
12) Was a galvanic anode installed as part of the inspection process? ___ Yes ___ No, if yes size and quantity
13) Digital Photos
Pipeline Inspection ReportPipeline Inspection Report
![Page 17: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/17.jpg)
Investigative Structure (Existing)Corrosion Assessment
Review of General Characteristics of Water System
- Age- Material Type- Wall Thickness- Construction Practices
Review Break / Leak HistoryField Survey
- Soil Conditions (Resistivity, Moisture Content, Chemical Analysis)
- Electrical TestData Analysis & Risk ManagementPriority Index (Identification of Opportunities to Reduce Replacement / Repair Costs)
![Page 18: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/18.jpg)
PRACTICAL GALVANIC SERIESMaterial Potential*
Pure Magnesium -1.75 Corrosive
Zinc -1.10
Aluminum Alloy -1.00
Cadmium -0.80
Mild Steel (New) -0.70
Mild Steel (Old) -0.50
Cast/Ductile Iron -0.50
Stainless Steel -0.50 to + 0.10
Copper, Brass, Bronze -0.20
Gold +0.20
Carbon, Graphite, Coke +0.30 Less Corrosive
* Potentials With Respect to Saturated Cu-CuSO4 Electrode
![Page 19: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/19.jpg)
Coupling to Dissimilar MetalsCopper service (Cathode)- 300mV
Iron pipe (Anode) - 500mV
Metallic Connection
![Page 20: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/20.jpg)
Anode Installation Prevents Corrosion on Anode Installation Prevents Corrosion on Copper Service LineCopper Service Line
AnodeAnode
Anode Connection to Line Anode Connection to Line
Non metallic orNon metallic orPolyethylene EncasedPolyethylene EncasedDuctile Iron MainDuctile Iron Main
![Page 21: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/21.jpg)
Meter Vaults
(Keep dry if possible)(Keep dry if possible)
![Page 22: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/22.jpg)
Gate Valve Corrosion
![Page 23: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/23.jpg)
Water WellsWater Wells
![Page 24: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/24.jpg)
Stainless Steel Bowl
Shaft
Bronze Shaft
Spacers(Cathode)
Mild Steel Column
Pipe(Anode -
Corrodes)
Bowl Shaft(Stainless Steel)
Cathode
Crown (Steel) Anode
Crown Bearing (Bronze) Cathode Discharge
Case (Cast Iron) Anode
Impeller (Bronze) Cathode
Bowls (Cast Iron) Anode
Suction Case (Cast Iron) Anode
![Page 25: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/25.jpg)
Water(Electrolyte)
Current Flow
Tank Wall
Anodic Area(Corrodes)
Cathodic Area(Protected)
Metallic Return Path
![Page 26: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/26.jpg)
![Page 27: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/27.jpg)
Anode
Cathode(Protected)
![Page 28: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/28.jpg)
CP for New or Refurbished Tanks
![Page 29: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/29.jpg)
CP Benefits: CP Benefits: -- Triple life of coatingTriple life of coating-- Reduce maintenance costReduce maintenance cost
![Page 30: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/30.jpg)
Structure
Magnesium
Anode
Current Flow
Galvanic Anode
![Page 31: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/31.jpg)
Thermit Weld to Pipe
![Page 32: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/32.jpg)
Augered hole
Connection to piping
Galvanic anode
Anode Installation
![Page 33: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/33.jpg)
0
5
10
15
20
Num
ber o
f Bre
aks
74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Year
94 Breaks Prior to Cathodic Protection 1 Breaks After Cathodic Protection
Break Records for Water Mains Cathodically Protected
Cathodic Protection ResultsLength Protected = 55,360 feet
![Page 34: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/34.jpg)
Repair of Break ShouldRepair of Break Should Include Anode InstallationInclude Anode Installation
IncompleteIncomplete CompleteComplete
![Page 35: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/35.jpg)
Water Leak Repair KitWater Leak Repair Kit
Includes:Includes:
Installation instructions.Installation instructions.
One day onsite technical One day onsite technical assistance.assistance.
CathodicCathodic protection protection components/connection materials components/connection materials suitable for 10 repairs.suitable for 10 repairs.
![Page 36: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/36.jpg)
Pipe
Metallic Coupling
Lower Stress Area(Cathode)
Threaded BoltHigher Stress Area
(Anode)
Stress Corrosion
![Page 37: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/37.jpg)
Pipe
Metallic Coupling
Galvanic Anode
Anode Lead Wire Connection
Cathodic Protection of Metallic Fitting
![Page 38: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/38.jpg)
Anode Installed on Metallic Fitting
![Page 39: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/39.jpg)
Pumping StationsPumping Stations
CORRPROC O M P A N I E S I N C
![Page 40: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/40.jpg)
Depleted & Refurbished Cathodic Protection for Lift Stations
![Page 41: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/41.jpg)
![Page 42: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/42.jpg)
Corrosion of Clarifier Center Well Corrosion of Clarifier Center Well
![Page 43: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/43.jpg)
AC MitigationAC Mitigation
![Page 44: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/44.jpg)
Internal Corrosionof Force Mains….
Solids Solids BuildupBuildup
H2SH2S
![Page 45: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/45.jpg)
24” Ductile Iron Force Main
• Internal failure following loss of internal mortar lining
• Failure was along top of pipe due to formation of hydrogen sulfide gas
![Page 46: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/46.jpg)
InsituformInsituform
![Page 47: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/47.jpg)
Traffic Disruptions Water Loss
Fire Protection
Legal &Environmental Claims
Damages
![Page 48: Corrosion Inspection & Repair Solutions for Water Systems](https://reader035.vdocuments.site/reader035/viewer/2022071602/613d5ddd736caf36b75c7b9d/html5/thumbnails/48.jpg)
QUESTIONS ?QUESTIONS ?
James T LaryJames T LaryCorrpro Companies, Inc.Corrpro Companies, Inc.1055 West Smith Road1055 West Smith Road
Medina, Ohio 44256Medina, Ohio 44256330330--241241--66156615
email email [email protected]@corrpro.com