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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 !