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P i p e W r a p CT & BT

P i p e W r a p CT & BT. www.stpltd.com. PROVEN PROTECTION AGAINST CORROSION THAT LASTS ON AND ON…………. www.stpltd.com. PIPELINE PROTECTION SYSTEMS with a difference. www.stpltd.com. Coal tar basics. Coke (75%). Coal. Town Gas. Heat 1000-1200 deg C for 14-20 hrs.

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P i p e W r a p CT & BT

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  1. P • i • p • e • W • r • a • p • CT • & • BT www.stpltd.com PROVEN PROTECTION AGAINST CORROSION THAT LASTS ON AND ON………….

  2. www.stpltd.com PIPELINE PROTECTION SYSTEMS with a difference

  3. www.stpltd.com Coal tar basics Coke (75%) Coal Town Gas Heat 1000-1200 deg C for 14-20 hrs Benzol/Toluol Ammonia Water Coal Tar (3.5%)

  4. Destructive Distillation of Coal Tar www.stpltd.com Coal Tar Pitch 53% (polycyclic aromatic compounds) Anthracene Tar Oil Creosetes Napthalene

  5. www.stpltd.com Bitumen Bitumen is the last fraction that is left after the fractional distillation of crude oil .Unlike coal tar concentration of polycyclic aromatics is lesser with a high concentration of aliphatic or straight –chain compounds (CH2-CH2-CH2-CH2-CH2-CH2-CH2)-

  6. Tape anatomy (CT) www.stpltd.com Inner core of high tensile strength glass fibre fabric sandwiched by a coating of coal tar modulate followed by a layer of polythene film which peels off at the time of coating PE FILM COAL TAR GLASS FIBRE FABRIC COAL TAR PE FILM CONFORMS TO AWWA C203/2002 AND IS:15337/2003 STANDARS

  7. Tape anatomy (bT) www.stpltd.com Inner core of high tensile strength glass fibre fabric sandwiched by a coating of bitumen followed by a layer of high density polythethylene film on both sides for thermofusability HMHDPE BITUMEN GLASS FIBRE FABRIC BITUMEN HMHDPE CONFORMS TO IS:10221 APPENDIX B

  8. www.stpltd.com Application METHODOLOGY

  9. www.stpltd.com Surface preparation ….WHY?

  10. www.stpltd.com surface preparation

  11. www.stpltd.com PRIMER APPLICATION PipeWrap BT PipeWrap CT TOUCH DRY 20-30 MIN ShaliPrime (FD) @200 ml/sqm Dry Film Thickness 30 microns ShaliPrime PW CT @100-120 ml/sqm

  12. www.stpltd.com TAPE APPLICATION (ct)

  13. www.stpltd.com taPE APPLICATION(bt)

  14. www.stpltd.com packaging PIPEWRAP CT PIPEWRAP BT • STD ROLL LENGTH 1*10 MTR • STD WIDTHS 250/500/1000 MM THICKNESS 2/3/4MM THICKNESS 2/3/4MM 2/3 MM AVAILABLE IN 1*20M ROLLS

  15. www.stpltd.com IMPORTANT FIELD TESTS Two parallel incisions are made on the pipe coating reaching up to the primer coating (150mm*50mm) to generate a slice of tissue fibre which is pulled in a direction perpendicular to the pipe.A peel off area not exceeding 5mm*50 mm indicates good adhesion and bonding characteristics ADHESION/PEEL OFF STRENGTH 150/50MM TAPE SURFACE

  16. www.stpltd.com IMPORTANT FIELD TESTS A high voltage(15KV) is applied across the coating to test its uniformity and absence of pores. Porosity causes a current to travel through the metal surface with a spark & crackling sound .Such areas need to be re-worked before service HOLIDAY TEST 10/12/15 KV For 2/3/4mm respectively Metal surface PipeWrap

  17. www.stpltd.com precautions 1.Use goggles ,mask & nose cover 2.Wash hands with warm soap water after app 3.Store rolls in shed away from heat

  18. www.stpltd.com Make the right choice …..Choose STP and feel the difference

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