Polyurethane Coating
Specifications for
Ductile Iron Pipe and Fittings for
Potable Water
CORROPIPE II PW
THE PRODUCT AND ITS USES
Corropipe II PW is a two component, quick setting, 100% solids polyurethane developed
to protect potable water pipes from internal corrosion and abrasion. Corropipe II PW cures
to form a tough, durable non-toxic polyurethane solid that is holiday-free and resistant
to chemicals, corrosion and abrasion. Corropipe II PW will not impart any taste to the
contents of the pipe. For non-potable service, Corropipe II PW resists many common
chemicals but in aggressive environments and at elevated temperatures, refer to the
technical data sheet for Corropipe II PW and Madison's Chemical Resistance Bulletin.
Corropipe II PW can be sprayed to any desired thickness in a single coat application at
any ambient temperature to enable fast and trouble-free application. Using Corropipe II PW
cuts costs by improving productivity and increasing throughput. Corropipe II PW is
certified by NSF International (formerly National Sanitation Foundation) to meet ANSI/NSF
Standard 61 and exceeds all major international standards.
| TECHNICAL INFORMATION |
|
|
| PROPERTY |
TEST DESCRIPTION |
RESULTS |
Application Temperatures
|
N/A |
-40° C/-40° F to
65° C/150° F |
Initial Setting Time
|
@ 70° F/20° C |
3 minutes |
Curing Time Before Handling
|
@ 70° F/20° C |
5 to 8 minutes |
Ultimate Cure
|
@ 70° F/20° C |
48 hours |
Recoat Time (over itself)
|
@ 70° F/20° C |
up to 45 minutes |
Recoat Time (over PW Touch-Up)
|
@ 70° F/20° C |
up to 24 hours |
Solids Content
|
Conversion to solids by volume |
100% |
Volatile Organic Compounds (VOCs)
|
|
0% |
Theoretical coverage
|
|
1604ft2
/ US gal/ mil; 40 / litre per 25 microns |
Adhesion (to seel)
|
ASTM D4541 |
2000+ p.s.i. |
Adhesion (to concrete)
|
ASTM D4541 |
> cohesive
strength of concrete |
Hardness
|
ASTM D-2240 Shore “D” |
70 to 80 |
Flexibility
|
ASTM D-522 |
180° @ 15 mils
over 3/4” mandril |
Abrasion Resistance
|
ASTM D-4060 (Taber CS-17) |
52 mg @ 1 kg per
1000 cycles |
Permeability
|
ASTM E-96 (@ 15 mils) |
1.6 x 10-3
perm In. |
Resistance to Cathodic Disbondment
|
ASTM G8-72 (STP, 28 days) |
Excellent (<10 mm radius) |
|
ASTM G8-72 (@65C, 28 days) |
Excellent (<15
mm radius) |
Chemical Resistance
|
ASTM D-543 |
see Chemical
Resistance Chart |
Water Absorption
|
ASTM D-471 |
<3% (no
absorption below surface) |
Impact Resistance
|
ASTM D2794 |
Very Good (>40
in. lbs.) |
Service Temperature (wet)
|
ASTM D-870 |
wet, up to 65° C;
dry, up to 90° C |
Color Availability
|
|
off-white, gray |
APPLICATION INSTRUCTIONS
FOR DETAILED INSTRUCTIONS ON APPLICATION OF COATINGS, CONTACT YOUR MADISON
REPRESENTATIVE.
A. SURFACE PREPARATION
1) Ensure that surface is clean, dry and uncontaminated. Do not
proceed if temperature is near dew point or relative humidity exceeds 85%.
2) Blast with sand or steel grit, using an angular medium to a Near White Blast
(SSPC-SP10; NACE 2; SA 2.5 standards) with a minimum 2.5 mil (65 microns) profile.
B. APPLICATION OF COATING
1) Roll or agitate individual components thoroughly before use to
disperse pigments and assure homogeneity. Do not thin. Do not mix "A" and
"B" together.
2) Spray apply coating using a two component, 1:1 mix ratio, heated airless spray unit.
3) Unlimited film thickness can be obtained in a single coat, multi-pass application,
using one of several techniques.
4) A second coat may be applied over the first, so long as it si within the recoat
time. Otherwise, roughening of the surface will be necessary to ensure good intercoat
adhesion.
5) Let coating reach full cure before putting into service; then follow pipe
decontamination procedure to remove any dirt and debris.
C. CLEAN-UP AND STORAGE
1) Corropipe II PW will react with humidity and moisture. Keep
containers tightly sealed; store upside down. For clean-up, use Madison VR-1 Viscosity
Reducer, M.E.K. or a 50:50 blend of M.E.K. and Xylol. Other solvents may react with
Corropipe II PW.
2) Store between 500F (100C) and 800F (270C).
DO NOT FREEZE. Use product within 6 months of receiving.
HEALTH AND SAFETY
Corropipe II PW is intended for industrial use only. It contains no monomeric
isocyanate but may nevertheless cause respiratory distress in some people. Provide ample
ventilation. Wear a fresh air respirator when using in confined areas or when spraying. If
swallowed, do NOT induce vomiting as this will cause additional throat irritation; contact
physician. If splashed on skin, remove immediately with rubbing alcohol and then wash with
soap and water. If splashed in eyes, wash liberally with clean water and contact
physician; temporary irritation of eyes may last several days. Contains no known or
suspected carcinogens or mutagens. Applicators should wear rubber gloves, safety goggles
and protective clothing. See MSDS for more information. The finished product is totally
inert and harmless.
LIMITED TWO YEAR WARRANTY
Madison will replace any product which, in service for which it is suitable, fails to
meet specifications within two years of sale and which is proven to be defective when
applied in a professional manner according to instructions. Madison accepts no
responsibility or liability for consequential damage, injury or expense in contract or
negligence. This product replacement warranty is in lieu of any other right, warranty,
guarantee or condition, statutory or otherwise, expressed or implied. whether as to
fitness for a particular purpose or as to merchantable quality or otherwise.
The information contained herein is believed to be accurate as of the date of
publication. Madison reserves the right to change product specifications without notice. |
