Epoxy Application Procedures Technical Bulletin

Transcription

1 Technical Bulletin MANUFACTURER Raven Lining Systems E. 61 st Street, Suite A Broken Arrow, OK (918) DESCRIPTION The following is a brief outline of the procedures for the installation of Raven epoxy coatings. The details contained herein are not inclusive of all aspects of application and modifications to such may be necessary depending upon the application conditions, the coating and substrate. Equipment for Installation Coating manufacturer approved heated plural component airless spray system Operational, clean equipment with proper maintenance performed Ancillary support equipment (generator, air compressor, pressure washer, etc.) as required Pre-Construction Review Review and clarification of project specifications Certification/Qualification submittals for Contractor with specified materials and equipment Review and confirm compatibility requirements for various materials (patching materials, grouts, flexible sealants, coatings, etc.) Specify and review safety requirements Define responsibilities and authorities of the coating contractor, general contractor, project inspector, Engineer, owner, etc. Initial Inspection Safety Assessment Site Control Structure Environment Flow Control Bypass, Plugging, and Diversion Substrate Inspection: Examine for contaminates which may need to be removed Chemical or mechanical cleaning Ambient/Environmental conditions Examine for conditions that may affect application of coating Examine for structural deficiencies which may require additional repairs Examine for infiltration that will need to be corrected Examine for interfacing materials such as existing coatings, liners, piping, fixtures, or other materials that may require special surface preparation

2 Surface Preparation Ambient conditions to be monitored: Temperature of substrate and air Potential airborne contaminants Rain events Direct sunlight or other heat sources Existing coatings or other materials that may need to be removed or may require special surface preparation Existing contaminants such as oils, greases, hydrocarbons that will need to be removed Prepare Substrate: Typically using high-pressure water cleaning (minimum 5000 GPM) using a zero degree rotary nozzle on the preparation of a cement structure is sufficient to expose a surface profile of a minimum CSP 3, but sand injection water blasting, abrasive blasting, vapor blasting, or mechanically tooling the surface maybe required. Thoroughly clean surfaces to remove laitance, debris, dirt, etc. to create a sound, clean substrate with sufficient porosity and profile to promote coating adhesion. Utilize industry standard practices of key ways and termination groves around inlets, outlets, and coating terminations Rinse surfaces with low pressure water to wash off debris Remove access water and remaining debris from the structure Repairs and Infiltration Control Repair surface defects, irregularities, honeycombs, bug holes, etc. using a high early strength cement approved by the coating manufacturer, as necessary Mix, apply and cure repair materials according to manufacturer s recommendations Repair points of infiltration using hydraulic cement or pressure grouting Final Surface Preparation Allow for proper cure of repair materials Prepare repaired areas to remove laitance and contaminants and to expose a minimum CSP 3 surface profile Remove access water and remaining debris from the structure Coating Application Trained and certified personnel on site Equipment in proper working order Proper (specified) materials to be applied Epoxy Application Quality Control Proper Mix and Ratio: Verified by observing system outlet pressure gauges for even pumping pressure and consistent color from the spray gun Coating thickness verification using wet film thickness gauge Proper sealing of pipes and joints Monolithic coverage ensuring filling of all surface defects and repair of coating holidays as necessary.

3 Testing Visual inspection for coating defects or discontinuities Holiday detection using high voltage spark testing Adhesion testing (if required) Touch-up Mark defects with compatible marking device Removal of contaminants with a solvent wipe or potable water wipe Profiling of surface when needed using abrasive media (sandpaper, abrasive blast, etc.) Ensure proper ratio and mixing of touch-up materials to be hand applied using brush or trowel Retest repaired areas as required

4 Sample Equipment & Supply List Description Notes Qty Spray Guns Graco Flex 2 Tips Graco RAC V 535, 531, Guards Graco RAC V 4 Whip hose 1/4" x 10' to 40 2 Static Mixer Raven Mixing Tubes or similar (1/4" mixer x 12" minimum) 4 Coating Application Inspection, Testing & Repairs Confined Space Entry Adapter Fittings WFT Mil gauge Raven WFT Gauge 4 Spray buckets for waste 5 gallon pails for waste 4 Solvent 5 gallon can of MEK or Acetone 2 Epoxy coating Raven 405 or other Epoxy primer Raven 155, 171, 171FS for new or dense concrete Drum Blanket heaters For 30 or 55 gallon drum 2 Spray System Hydra Cat, XP 50, or XP 70 1 Compressed air supply Min psi 1 Electrical supply Min 15KW, 240V/Single Phase 1 Waste containers For epoxy and solvent 2 High voltage holiday tester Tinker & Razor AP/W 1 Marker Black 2 Sand paper (60-80 grit) 1 pkg Mixing cups oz. plastic 24 Plastic spoons 24 Disposable paint brushes 2" 24 Scale or proportioning cups Adhesion testing equipment Deflesko PosiTest or Elcometer 106 DFT testing equipment magnetic/eddy or ultrasonic Repair/Touch Up Material Inspection Log/Documentation CSE Program/Procedures Entry log/permits Gas detector Tripod/winch Harness Lanyard Blower Blower Duct

5 Sample Equipment & Supply List Personal Protective Equipment (PPE) Surface Preparation Misc. Description Notes Qty Safety Glasses Each personnel plus extras 12 Rubber Gloves For general duties 12 Solvent Gloves MEK resistant gloves for cleaning parts 12 Half Face Respirator For each personnel that will be around spray Full Face Respirator For each personnel that will be actually spraying Full Face Peel Offs For each personnel that will be actually spraying 12 Respirator Cartridges Recommend HEPA/Methyl Amine Tyvek Suits Full suit with hood 12 Rain Suits For water blasting Rubber Boots/Steel Toe Work Boots/Steel Toe Face Shield For water blasting 1 Hard Hat Spray Sock For spraying 12 Ear Plugs box Respirator Wipes For respirator cleaning box Harness/Fall Protection Pressure Washer Check working condition, maintenance, etc 1 PW Hose Need sufficient length to reach structure Pressure washer gun/lance 1 Zero Degree Rotating Tip For pressure washer 1 Fuel/Fuel can For pressure washer Water source For pressure washer Water supply hose For pressure washer Shop vac For debris removal Shovel For debris removal Brooms For debris removal Trash buckets For debris removal Cement Approved/Compatible high early strength cement for repairs Cement tools Mixing and application tools (containers, mixer, drill, trowels, etc) Rags Box of disposable rags 1 Trash can 1 Trash can liners box Generator fuel Generator/Air Compressor Check working condition, maintenance, etc