Food Service FDA Title 21 CFR

Transcription

1 1.0 Scope 1.1 This recommendation covers the requirements for the surface preparation, application of primers and finish coats of resin linings to the interior surfaces of carbon/stainless steel vessels. 1.2 The lining materials covered in this installation guide are FDA: Title 21 CFR tested and approved for food service. Products covered, but not limited to, ProPrime 4809 Vinyl Ester Primer, ProLine 4855T Food Grade Vinyl Ester and ProLine 4811S Food Grade Gel Coat. 1.3 This installation guide is not intended to supersede any specification. It is intended as assistance to the specifying source, the installation contractor and the field inspector. 1.4 This is only a guide and field conditions may warrant the alterations of some procedures. Check with the owner, or the owner s representative, or the material supplier when in doubt. 2.0 Surface Preparation 2.1 All stainless steel and carbon steel interior surfaces to be lined shall be abrasive blasted with an iron free angular abrasive to achieve a blast profile of 3.0 mils, (minimum). Carbon steel substrates shall be cleaned to an SSPC-SP 5, White Metal Blast. 2.2 This blast quality must be maintained throughout the lining project. Options for air-conditioning and descant equipment, timing of priming and other precautionary measures to maintain and SP5 shall be employed. In the event of flash-rusting or other surface contaminants, substrate shall be re-cleaned and an SP5 abrasive blast quality shall be restored. 2.3 All blasted surfaces are to be blown down with clean compressed air and/or vacuumed removing all traces of abrasive, dust and debris from surfaces, pockets and corners. 3.0 Chloride Removal 3.1 Upon the completion of the abrasive blast the tanks interior shall be decontaminated with Chlor-Rid to remove free Chloride ions on the stainless steel or carbon steel surface. Follow Chlor-Rid manufacturer s application instructions. PROLINE 4855T/4811S Page 1

2 3.2 Upon the completion of the Chlor-Rid application, multiple tests should be performed on the surface in different locations to assure the level of free Chloride ions is 3 ppm or less. If any of the test results indicate a level higher than 3 ppm then a second application of Chlor-Rid shall be done. Retest after this application. If the second test indicates a level higher than 3 ppm, contact a PROPOLYMER Coatings Coating representative before proceeding. 4.0 Materials 4.1 For this project the lining materials selected are to be solely sourced from the PROPOLYMER Coatings Company (St. Louis, MO). All primers, thinners, additives shall be from the manufacturer in new and unopened containers. Primer ProPrime 4805 Vinyl Ester Primer - Two Component Vinyl Ester Primer. Herein, referred to as ProPrime Applied at mils DFT. (DFT= Dry Film Thickness Flake Glass Lining ProLine 4855T Food Grade Vinyl Ester - Flake Glass Filled Vinyl Ester Herein, referred to at ProLine 4855T. - Two coats, trowel applied at mdft per coat for no less than 90.0 mils DFT Gelcoat ProLine 4811S Food Grade Gel Coat- Vinyl Ester Gel Coat. Herein referred to at ProLine 4811S. - Applied at mils DFT 5.0 Application Parameter & Details 5.1 All manufacturers mixing application, finishing and safety instructions must be strictly followed through all phases of the lining application. 5.2 When any of the following conditions exist, no blasting, priming or any other part of the lining system application shall be attempted without written waiver from the lining manufacturer. A. The relative humidity in the work area is greater than 90 percent. B. The surface temperature is less than 5 F above the dew point of the air in the work area. C. The temperature of the steel surface, lining materials or the air in the work area is higher than 110 F or less than 50 F. PROLINE 4855T/4811S Page 2

3 6.0 ProPrime 4805 Application and Scratch Coat Application 6.1 Apply ProPrime 4805 by spray, brush or roller. Prime all surfaces to be lined. 6.2 Mix ProPrime 4805 and PROPOLYMER Coatings LavaThix 9111 Bulking Additive to make a dry-wall mud consistent mixture. Scratch this material onto the surface using trowels to push material into pits and voids. Remove excess from surface. 7.0 ProLine 4855T 810-White Basecoat Application 7.1 The primer and scratch coat must be sufficiently cured prior to the basecoat application. If the primer remains uncoated more than 48 hours at 75 F or as directed by the manufacturer, the primed surfaces must be completely styrene wiped prior to the application of the basecoat. 7.2 If the primed surface remains uncoated for more than 5 days at 75 F, the primer must be tested for styrene sensitivity in several locations. Styrene sensitivity indicates the capability of the primer to soften and chemically bond to the basecoat. If the primer is not styrene sensitive, the areas of insensitivity must be lightly abraded by abrasive blasting and re-primed. 7.3 Remove any dirt, dust or other contamination prior to the application of the basecoat. 7.4 Application of the lining material shall always be by trowel (with a minimum thickness of 35 mils at any place). Wet film thickness readings should be taken during application to ensure proper film build. The basecoat and topcoat shall be finished by rolling the surface with styrene liquid. ProLine 4855T color 810 White shall be the first coat. 7.5 Visually inspect the coated surfaces for irregularities, voids and other imperfections. Random (1 or 2 per 100 ft.) dry film thickness readings must be taken to identify extreme highs and lows. PROLINE 4855T/4811S Page 3

4 8.0 ProLine 4855T 840-Lavender Topcoat Application 8.1 Prior to the application of the trowel applied topcoat (with a minimum thickness of 35 mils at any place), the surfaces of the previous applied basecoat must be clean, sufficiently cured and within the manufacturers recoat window. If beyond the recoat window, specific manufacturer s instructions for this situation must be followed. 8.2 The topcoat shall be ProLine 4855T color 840-Lavender. 8.3 Mix and apply the topcoat in accordance with the manufacturer's instructions, measuring the wet film thickness during application to ensure proper film thickness. 8.4 The topcoat shall be finished by rolling the surface with PROPOLYMER Coating s ProSlick 4809 Smoothing Liquid to align the glass flakes and achieve a relatively smooth and uniform surface. All other manufacturer application instructions must be strictly followed. 9.0 Spark Testing 9.1 Contractor shall spark test the entire lined surface (every square foot) using a variable voltage spark tester at 100 volts/mils, or at other voltage specified in the manufacturer s published literature, prior to the application of the gel coat. NOTE: The spark testing must be witnessed by PROPOLYMER COATINGS COMPANY or owner approved Inspector, who must sign off on the Contractor s inspection data sheet providing verification of the stated results. 9.2 After completion of the spark testing and repair of all pinholes and voids, only the repaired areas shall be spark tested again and again repaired if necessary. PROLINE 4855T/4811S Page 4

5 10.0 ProLine 4811S 810-White Gel Coat Application 10.1 Prior to the application of the gel coat, the surface of the previously applied material must be clean, tack-free and within the manufacturer s recoat window. If beyond the recoat window, specific manufacturer s instructions must be followed Mix and apply the gel coat in accordance with the manufacturer s instructions to all internal surfaces, measuring the wet film thickness during the application to ensure proper film thickness. Total ProLine 4811S thicknesses shall be mils DFT Door Gasket Area/Flange Face Application ProLine 4811S - Total 3 Coats 11.1 Mix and apply the three, (3), coats of ProLine 4811S material in accordance with the manufacturer s instructions on the gasket area of the door. Apply at a rate of mils dft per coat. Between applications of the ProLine 4811S sand the previous coat. Total ProLine 4811S thickness, (3 coats), shall be mils dft Curing Schedule 12.1 Lining shall be force cured using fresh potable water elevated to 180 F. Water temperature shall be raised no more than 50F every 15-minutes. Once at 180F, the duration time shall be 2-hours Reference PROPOLYMER Coating s product data sheets for appropriate cure schedules or consult a PROPOLYMER Coatings representative Interior of tank shall be thoroughly washed prior to placing into service. PROLINE 4855T/4811S Page 5

6 13.0 Quality Control Documentation 13.1 Upon completion of the lining, all daily quality control documents must be submitted to the owner Daily documentation shall include but not limited to the following: Environmental, surface cleanliness, profile measurement, start/stop times, material temperature, blast media used, material batch numbers, dry film thickness readings, holiday test results, people present on jobsite. END SPECIFICATION Reviewed and approved by PROPOLYMER Coatings 8460 Watson Road, Ste. 205 St. Louis, MO Signature Date PROLINE 4855T/4811S Page 6

7 SUPPORTIVE DOCUMENTS SSPC-SP 5/NACE NO. 1 White Metal Blast Cleaning standard ASTM D Holiday Testing -standard ProPrime 4805 Vinyl Ester Primer -pds ProLine 4855T Food Grade Trowel Lining -pds ProLine 4811S Food Grade Gel Coat -pds ProSlick 4809 Smoothing Liquid pds LavaThix 9111 Bulking Additive PROLINE 4855T/4811S Page 7