Pipeline Coatings for New Pipelines
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Transcript of Pipeline Coatings for New Pipelines
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PIPELINE COATINGS FOR NEW PIPELINES
Coal Tar Enamel Coating
3 Layer Polyethylene Coating
3 Layer Polypropylene Coating
Fusion Bonded Epoxy
PIPELINE COATINGS
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PIPE LINE COATINGS
3 LPE (2 to 3.5mm thk)
DFBE (0.7mm thk)FBE (0.45mm thk)
3 LPP (2 to 3.5mm thk)
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PIPELINE COATINGSTEMP RATING
FACTORY APPLIED
COATING
PICTORIAL VIEW MAXIMUM
TEMPERATURE RATING
Coal Tar Enamel 60C
3 Layer Polypropylene 140C
Dual Layer Fusion Bonded
Epoxy
120C
3 Layer Polyethylene 80C
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THOUGH PIPELINE COATINGS ARE DESIGNED
TO REMAIN BONDED TO STEEL FOR DESIGN LIFEOF PIPELINE --- IN REAL LIFE COATINGS TENDS TO
FAIL PREMATURELY OR AFTER THE DESIGN LIFE
THE PIPELINE OPERATOR STILL WANTS TO OPERATE
THE PIPELINE AND WOULD REQUIRE RE-COATING
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PIPELINE COATINGS FAILURES
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FAILURE OF COATINGS LEAD TO CORROSION
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CONSEQUESESOF
CORROSION
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PIPE RUPTURE
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SEVERE CORROSION
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PIPE RUPTURE
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FAILURE FROM THE SEAM
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WHY DO COATINGS FAIL
?
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WHY DO COATINGS FAIL
IMPROPER COATING SELECTION
IMPROPER COATING APPLICATION
LAYING DAMAGES
PREMATURE FAILURE OF COATING MATERIAL
IMPROPER CATHODIC PROTECTION
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WHEN COATINGS START TO
FAIL WHAT STEPS ARE TO
BE TAKEN
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ENHANCE CATHODIC
PROTECTION
RECONDITION / RECOAT
REPLACE THE PIPE LINE
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RECONDITION /
RECOAT
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VARIOUS TECHNOLOGIES OF
RECOATING
COAL TAR OVER THE DITCH
HOT APPLIED COAL TAR TAPE
COLD APPLIED TAPE VISCO ELASTIC TAPE
LIQUID EPOXY
LIQUID POLURETHANE LIQUID TAR POLYURETHANE
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RECONDITIONING / PRMING
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reconditioning
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THANK YOU !