prestressed concrete cylinder pipe (pccp) · pdf fileprestressed concrete cylinder pipe...
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HANSON PRESSURE PIPE Steve Smith
January 16,2014
PRESTRESSED CONCRETE CYLINDER PIPE (PCCP)
Chesapeake Section – AWWA
Symposium
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Slide 2 - 06.August 2007 Hanson sample slides – Group Comm & IR
Interpace Projects with Problems
INTERPACE – 45 MILLION FEET – 11,500 PROJECTS
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AWWA C-301 Key Improvements to Manufacturing
SUMMARY OF KEY IMPROVEMENTS TO PCCP
(to AWWA C301 since 1984)
MORTAR COATING
• Increased mortar coating thickness • Added cement slurry coating prior to prestressing and coating • Increased the minimum moisture content, which reduces absorption
making the coating less permeable • Required minimum compressive strength • Required a nondestructive thickness check on every pipe prior to removal
from the coating machine • Required a soundness check on the cured coating on every pipe
PRESTRESSING WIRE
• Increased the minimum size wire to 6 gauge, allowing better “keying” of
mortar to wire • Eliminated the possibility of using Class IV wire • Added a maximum temperature limit of 360º during wire drawing, which
eliminates the sensitivity of overheated wire to hydrogen embrittlement • Decreased the allowable fluctuation in wire wrapping tensile stress • Added tests to ensure high quality wire; i.e. Torsion, Bolt Cutter, Reduction of
Area, with testing required on every coil • ASTM A648 Supplementary HE Qualification Testing Requirement mandatory
CYLINDER STEEL
• Eliminated Grade E cold rolled steel • Eliminated 18 gauge thickness; minimum is 16 gauge • Required testing of weld strengths
CONCRETE
• Added minimum quality limits and testing frequencies for aggregates • Added limitation on allowable longitudinal cracks in core
OTHER
• Required qualification of welders • Added requirement for test equipment calibration • Improved quality control of gaskets • Added allowable design stresses and minimum cylinder thicknesses for
fittings
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Slide 4 - June 2009 Toronto and Ottawa Ontario Canada Seminars
AWWA C301
Prestressed Concrete Pressure Pipe, Steel Cylinder Type
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Slide 5 - June 2009 Toronto and Ottawa Ontario Canada Seminars
The New Hanson Pressure Pipe Manufacturing Locations
Lubbock, TX
Grand Prairie, TX
Victoria, TX
Palatka, FL
St. Eustache, QC, Canada
Hattiesburg, MS
Bakewell, TN
South Beloit, IL
Stouffville, ON, Canada
Uxbridge, ON, Canada
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PCCP History First Installation (LCP) - 1942
First AWWA Standard (Tentative) - 1949
First Installation (ECP) – 1953
Used in 90 of 100 Largest U.S. Municipalities
107,000,000 Feet (20,300 Miles), in U.S. and Canada
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STEEL CYLINDER FABRICATION
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JOINT RING ATTACHMENT
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CYLINDER HYDRO TEST
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APPLYING CONCRETE CORE – LCP & BWP
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ECP – VERTICAL CASTING
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HORIZONTAL PRESTRESSING
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VERTICAL PRESTRESSING
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MORTAR COATING
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Slide 15 - June 2009 Toronto and Ottawa Ontario Canada Seminars
MORTAR COATING
VERTICAL COATING
MACHINE FOR ECP
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MORTAR CURING
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CONCRETE CURING
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Slide 18 - June 2009 Toronto and Ottawa Ontario Canada Seminars
STEEL PLATE FABRICATION
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Slide 19 - June 2009 Toronto and Ottawa Ontario Canada Seminars
RAW FITTING
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Slide 20 - June 2009 Toronto and Ottawa Ontario Canada Seminars
MORTAR APPLICATION
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ECP vs LCP
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Field Services – Emergency Repair
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CPP Emergency Repair Questionnaire
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Slide 24 - 10 October 2012 VC Summer Nuclear Plant Seminar
Emergency Repair Program
Hanson Pressure Pipe has established an emergency repair program for all concrete pressure pipe products
Customers can contact a Hanson employee 24/7 in the event of a pipeline emergency
Pipe repair material is stocked in all manufacturing plants and ready for immediate shipment
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PCCP Emergency Repair Kit
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PCCP Closures
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Closure Installation – Squareness Top and Bottom
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Closure Installation – Squareness Top and Bottom
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Closure Installation – Squareness Side to Side
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Closures – Squareness Side to Side
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Closure Cutting
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Field Weld Closure
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Field Weld Closure
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Field Weld Closure
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Closure – Using Come Along to Pull Joint Home
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Closure – Hydraulic Jacking Bell
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FOLLOWER RING CLOSURE
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Slide 38 - 10 October 2012 VC Summer Nuclear Plant Seminar
Repair Saddle Assembly
Repair Saddle Assembly can be used to address localized problems on the pipe barrel – Broken prestressing wires – Punctured steel cylinder
Damage must be far enough away from the joint to allow the saddle assembly to be seated onto the pipe barrel
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Concrete Pressure Pipe Repair Saddle
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MECHANICAL JOINT SPIGOT AND MECHANICAL JOINT BELL ADAPTERS
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Slide 41 - 10 October 2012 VC Summer Nuclear Plant Seminar
Field Welding
Leaking joints can be welded for repair – Lined Cylinder Pipe joints can be welded on the exterior – Embedded Cylinder Pipe joint usually will need to be welded on the
interior
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STANDARD JOINT
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SNAP RINGJOINT
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SNAP RING JOINT
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ASSEMBLED SNAP RING JOINT
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HARNESS CLAMP JOINT - ECP
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HARNESS CLAMP JOINT
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Tapping Saddles
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Tapping PCCP
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Grouting with Diaper
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Questions
and Answers
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Tapping Saddle – Removing Prestress Wire
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PCCP
is a
Rigid
Pipe