Polyglass Pipe Grade
Product reference: : 2/12
Product title: Polyglass Pipe Grade
Valid from: 12th April 2004
Last reviewed: May 2019
A polyester glass flake pipe coating, specifically for application using centrifugal pipe rolling techniques.
Internal pipe coating for use in hydrocarbons, aqueous, marine and corrosive chemical service environments below 185°F (85°C).
Not suitable for protection against polar solvents, demineralized water and where pH conditions are below 1 or above 12. Refer to Chemical resistance chart.
Health & safety
Before handling or using this product, the material safetydata sheet should be read, and all precautions observed.
Metals: Grit blast to SSPC-SP10 (ISO standard 8501-1 Sa 2½) or equivalent. (For full details refer to CorrocoatSurface PreparationSP1.)Concrete: refer to Corrocoat data sheet SP5.
Specialist pipe rolling equipment.
Is dependent on intended service but Polyglass Pipe Grade is normally applied in a single wet film at between 40-78 mils (1000-2000 microns). Primer is not normally used. Forfurther details obtain Corrocoat Pipe Rolling instructions or refer to the CC training manual.
Base 12 months, hardener (catalyst) 6 months stored at temperatures below 75°F (24°C) and away from heatsources and direct sunlight. Frequent temperature cycling will shorten storage life.
Off white as standard.
Theoretical spreading rate
54 sf per gal at 30 mils (1.33m2/litre at 750 microns).
This material contains volatile liquid convertible to solids. Volume solids obtained will vary dependent upon polymerization conditions. Nominally 99.% of the contents are convertible to solid.
Practical spreading rate
40 sf per gal at 30 mils (1.0m2/litre at 750 microns). NOTE: This information is given in good faith, but rate may vary significantly dependent upon environmental conditions, the geometry and nature of work undertaken and the skill and care of application. Corrocoat accepts no responsibility for any deviation from these values.
Polyglass PG base: 0.04lbs/cubic inch (1.19 gms/cc) Hardener: 0.03lbs/ cubic inch (1.07 gms/cc)
Without inhibitor, tack free 6 hours, full cure 3-4 days at 68°F (20°C), but may be immersed in many environments after 12 hours. Low level through pipe ventilation should be maintained during cure.
Methyl Ethyl Ketone, Methyl Iso Butyl Ketone – before gel.
30 mils (750 microns) in marine conditions and up to 98 mils (2500 microns) in highly corrosive conditions, chemical or abrasive environments.
Methyl Ethyl Ketone Peroxide type P2.
Mixing ratio / mixing
98:2 base to hardener. For mixing instructions and inhibitor use refer to Polyglass Data Sheet 6.20A. Do not use inhibitor unless necessary and add before catalyst when used.
Typically, 25-30 minutes at 68°F (20°C). May be adjusted with inhibitor or manufactured specifically to suit specific requirements.
The performance of Polyglass Pipe Grade is adversely affected by the addition of solvent thinners and their use is prohibited. Thinning may be achieved by addition of not more than 5% styrene monomer to PPG by volume i.e. 0.25 gallons (1.00 litre) styrene per 5.25 gallons (20 litres) PPG.
1 Gallon and 5 Gallon Kits
3700 psi (25.5 N/mm2)
Elongation at break
1.3% in aqueous immersion
Thermal coefficient of linear expansion
13.968 x 10-6 /°C.
18 – 25 x 103 V/mm.
185°F (85°C) immersed. 248°F (120°C) non-immersed. No known lower limit.
Normally applied as a single coat but where necessary it should take place as soon as the previous coat has gelled and while still tacky. Maximum overcoating time is 48 hours at 68°F (20°C).