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PPG-Hi-Temp-1027-Booklet高清.pdf

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1、HI-TEMPHeat-resistant coatings for highly demanding industrial environmentsPPG HI-TEMP 1027Prevents CUI with superior protection for extreme temperature conditions?Resistant to extreme temperature range from-185C to 650C(-300F to 1,200F)while providing superior corrosion resistance?Can be applied di

2、rectly to hot substrates up to 316C(600F)?Prevents corrosion under insulation(CUI)?Prevents chloride-induced external stress corrosion cracking of insulated austenitic stainless steel?Ideal for cryogenic service?Excellent UV stability to prevent corrosion of non-insulated surfaces subject to atmosph

3、eric exposure?Simple to use:one-component,surface tolerant and open recoat window?Proven worldwide track record with excellent resultsProven,long-lasting protection The PPG HI-TEMP 1027 coating prevents corrosion in insulated-and non-insulated services for carbon and stainless steels over an extreme

4、 temperature range from 185C to 650C(300F to 1,200F)even in thermal cycle-and thermal shock conditions.The ability to apply the coating to hot steel can reduce plant shutdowns and therefore lower potential revenue losses.Corrosion under insulation(CUI)is one of the industrys major concerns leading t

5、o high costs to refineries and petrochemical facilities.CUI can result in accidental facility shutdowns and potentially cause environmental issues,personal injuries and negatively affect company reputations.There are a number of key properties that a coating must have in order to be effective.Resist

6、ance to boiling waterThe PPG HI-TEMP 1027 coating is resistant to intermittent immersion in boiling water.Designed to resist the severe real world conditions of a continually changing harsh environment,it can withstand the repeated cycle of heat,then thermal shock,then immersion in boiling water,the

7、n back to heat,and so on.Heat and thermal shock resistanceThermal shock can be a significant cause of CUI.Thermal shock can cause cracking,fracturing and delamination.This allows water to come into contact withthe insulated steel,leading to CUI.The PPG HI-TEMP 1027heat-resistant coating is able to w

8、ithstand severe cyclic conditions in the cryogenic temperature range through to an elevated temperature of 650C(1,200F)without any effect to the coating.Direct application to hot steel up to 316C(600F)The problem of direct application to hot steel is a main issue for preventing CUI.Chemical plants a

9、nd refineries affected by CUI often cannot,or will not,shut down the equipment.To deal with this situation,the PPG HI-TEMP 1027 coating can be applied to hot operating equipment and surface application temperatures up to 316C(600F).This reduces plant shutdowns and the potential revenue losses.Excell

10、ent choice for maintenance easy for touch-up and repairFormulated for easy application,the PPG HI-TEMP 1027 coating is surface tolerant,and can be applied to tightly adhering rust in maintenance and repair situations.In addition,it has an unlimited recoat window to ease future touch-up and repair ta

11、sks.Simple to useSince most generic CUI systems are epoxy based and therefore contain at least two components,they are inherently more difficult to work with.The PPG HI-TEMP 1027 coating is a single-component material,which can be applied by spray,brush and roller,and dries by air,so no heat cure is

12、 required.Established worldwide track record withexcellent resultsTop-class international refineries and petrochemical facilities have used the PPG HI-TEMP 1027 coating for over a decade.The list of clients and case studies can be made available upon request.Please contact your local PPG sales repre

13、sentatives for more details.PPG Protective&Marine Coatings|P.O.Box 58034|1040 HA Amsterdam|The Netherlands|Tel+31(0)20 407 5050|Fax+31(0)20 407 5059Email pmc|Website|601639-GLOB|Created March 2014No rights can be derived from the content of this publication.Unless otherwise agreed upon in writing,al

14、l products and technical advice are subject to our terms of sale,available on our website.All rights reserved.The PPG logo is a registered trademark.Bringing innovation to the surface.Is a trademarks of PPG Industries Ohio,Inc.PPG HI-TEMP and HI-TEMP 1027 are trademarks of PPG Coatings Europe B.V.PP

15、G HI-TEMP 1027Prevents CUI with superior protection for extreme temperature conditionsSolution to SCCCase StudyPrevention of Chloride Induced ExternalStress Corrosion Cracking of InsulatedAustenitic Stainless Steel Solution to SCCCryogenicCase StudyPrevention of Chloride Induced ExternalStress Corro

16、sion Cracking of InsulatedAustenitic Stainless Steel-CryogenicConditionsSolution to CUICase StudyPrevention of Corrosion UnderInsulation(CUI)Solution to CUICase StudyPrevention of Corrosion Under Insulation(CUI)and Prevention of Corrosion fromAtmospheric ExposureSolution to CUICase StudyPrevention o

17、f Corrosion under Insulation(CUI)Prevention of Corrosion from Atmospheric ExposureHot Application of CoatingsSolution to CUICase StudyPrevention of Corrosion Under Insulation(CUI)Prevention of Corrosion from Atmospheric ExposureHot Application of Coatings1Safety Considerations forApplication of Spec

18、ialty High-Temperature Coatings to Hot SurfacesDaniel P.Adley,CIH,CSPKTA-Tator,Inc.BackgroundKTA-Tator,Inc.was retained by Hi-Temp Coatings Technology,to address occupational safety and health issues associated with the use of specialty coating systems specifically designed for direct application to

19、 hot surfaces for preventing corrosion-under-insulation and corrosion in atmospheric(non-insulated)service environments.While specialty high temperature coatings have reportedly been applied directly to hot surfaces safely and successfully for many years,several factors must be considered.This white

20、 paper addresses key safety and health precautions that should be considered.Special NoteWorker safety should be addressed when working on any project involving application of coatings to both ambient temperature and hot surfaces.The employer and the employers Environmental,Health and Safety staff h

21、ave responsibility for all aspects of worker safety.Any project involving surface preparation and coating of both ambient temperature and hot surfaces should be properly planned and executed by competent,experienced personnel with approval of and supervision by safety representatives for the contrac

22、tor and facility owner.INTRODUCTIONManagers of petrochemical,refining,power,offshore,petrochemical,pulp and paper,and other facilities with extensive hot processes and piping systems are frequently challenged with performing all the necessary coatings maintenance work only during periods of outages.

23、Outages are required so that process equipment can be properly maintained and repaired including:cleaning of pipelines and vessels,maintenance and replacement of pumps,motors and valves,maintenance coating operations,and other work that can only be accomplished when the operations are shut down.When

24、 coatings work has to get done on areas where elevated temperatures are involved,many think that the facility has to be shut down.This may not be the case.A question frequently posed by facility managers is,“Can I do maintenance painting work while the plant is operating?”As described below,the answ

25、er is,“Yes you can,but there are safety and health issues that must be considered.”2SAFETY AND HEALTH CONSIDERATIONSThere is a range of safety and health hazards that must be considered on every industrial maintenance painting project,whether the coating material is being applied to hot steel or not

26、.Some of these include proper material handling and storage,fall protection,control of fire and explosion hazards,and exposure to noise,heavy metals,solvents and other health risks.These risks must be properly evaluated and controlled on every industrial maintenance painting project,regardless of wh

27、en or where the work is performed.While present on any job,when applying specialty coatings to hot surfaces,some safety and health issues should receive additional consideration.Fire SafetyAs illustrated in Figure 1,fuel,oxygen,a source of ignition and a chemical chain of reaction must all combine i

28、n order for a fire to occur.The elements of the fire tetrahedron that we can control during coating application are fuel and source of ignition.That is,displacing oxygen in the work area with an inert gas such as nitrogen or disrupting the complex chemical reaction of a fire with a halide suppressio

29、n system are simply not practical fire prevention strategies during maintenance painting.The fuel element of the fire tetrahedron is provided by flammable solvents and/or combustible materials in the coating system.A commonly recognized definition of flammable and combustible liquids in the United S

30、tates is found in the National Fire Protection Associations(NFPA)30,Flammable andCombustible Liquids Code:Flammable Liquid Any liquid having a closed-cup flash point below 100F(37.8C)and having vapor pressure not exceeding 40 psia(276 kPA)at 100F.Combustible Liquid Any liquid with a flash point at o

31、r above 100oF(37.8C),but below 200F(93C).The internationally recognized Globally Harmonized System of Classification and Labeling of Chemicals(GHS)uses a slightly different definition.Under the GHS system,both flammable and combustible liquids under NFPA terms are considered flammable(i.e.,GHS defin

32、es a flammable liquid as having a flash point of not more than 93C).Substances or mixtures of this hazard class(flammable)are assigned to one of four hazard categories on the basis of the flash point and boiling point:Table 1:GHS Definition of Flammable LiquidsCategory Criteria12Flash point 35C(95F)

33、343Note that in the United States,the federal Occupational Safety and Health Administration(OSHA)modified the existing Hazard Communication standard,including adopting these hazard categories and selected other aspects of the GHS(Federal Register-March 26,2012).The first portions of the revised stan

34、dard are enforceable on December 1,2013,while full implementation is required by June 1,2016.Flammable and combustible liquids in many coatings(i.e.,solvents)can vaporize and form flammable mixtures in the air,especially when atomized(e.g.,during spray application)or heated.The degree of hazard depe

35、nds on the following:1.The auto ignition temperature(AIT):The AIT of the coating material is the single most importantissue when applying coatings to hot operating equipment.AIT is defined(by the National Safety Council publication Accident Prevention Manual For Business and Industry:Engineering&Tec

36、hnology)as“the minimum temperature at which a flammable gas-air or vapor-air mixture will ignite from its own heat source or contact with a heated surface without the presence of an open spark or flame.”As will be described in greater detail below,the coating must have an auto ignition temperature g

37、reater than that of the hot surface on which it will be applied.2.The flash point of the liquid.The concept of flash point as defined by NFPA 30 is“the minimum temperature of a liquid at which sufficient vapor is given off to form an ignitable mixture with the air,near the surface of the liquid”In o

38、ther words,the flash point describes the temperature of the liquid that is high enough to generate enough vapor to create a flame if a source of ignition were introduced.The flash points of many flammable solvents are(well)below 32?F/0?C.Which means that even when temperatures are below freezing,the

39、 solvent is still giving off enough vapor to ignite.As a result,solvent-borne industrial coatings are routinely applied at temperatures above the flash point ofthe respective solvents(even at ambient temperatures),with proper precautions.3.The concentration of vapors in the air.For vapors of flammab

40、le liquids,there is a minimum concentration below which the spread of the flame does not occur when in contact with a source of ignition.This is the Lower Flammable Limit(LFL).There is maximum concentration of vapor in the air above which the spread of the flame does not occur.This is the Upper Flam

41、mable Limit(UFL).The flammable range is between the LFL and the UFL,when the concentration of vapors can support combustion.4.The source of ignition.That is,something with enough energy or heat to cause the air/vapor mixture to burst into flame.The source of ignition could include sparks,static elec

42、tricity or open flames,or a heat source that heats the flammable liquid above its auto-ignition temperature.As described more fully later,in hot-work environments,a potential source of ignition is created by the temperature of the surfaces being painted.Applying coatings to hot surfaces increases th

43、e rate at which the solvents are driven off.When applying solvent-borne coatings to hot surfaces it must be assumed that the concentration of vapors in the air could exceed the LFL(at least for a short time after application).As with coating application to ambient temperature steel,controls must be

44、implemented.4While the LFL is likely to be achieved over a shorter period of time during hot application of coatings than coatings work performed at ambient conditions,the resulting fire hazard exists in both applications.That is,the fire hazard and associated controls must be considered for the app

45、lication of any solvent-borne flammable coating system,regardless of the work environment.It must be recognized that the fuel component of the fire tetrahedron will be present in both hot and ambient environments and basic steps must be taken to minimize unnecessary solvent vapors in the work area.I

46、n addition,as outlined later,attention must also be directed to eliminating the remaining element of the tetrahedron,the source of ignition.Control of Flammable Vapors(Fuel)Reduce the fuel element(e.g.,flammable vapors)of the fire tetrahedron by implementing basic controls such as:1.Handle and store

47、 flammable liquids in approved,self-closing containers.2.Keep the number of flammable liquids containers in the work area and in storage areas to the minimum necessary and within allowable(regulatory)limits.3.Store flammable and combustible materials in approved storage areas,away from sources of ig

48、nition or heat sources.4.Clean up spills immediately.5.Follow good housekeeping practices in order to reduce the amount of combustible material(e.g.,paper,lumber,etc.)available to provide additional fuel in the event of a fire.6.Substitute alkaline detergents(e.g.,tri-sodium phosphate)followed by su

49、rface washing with fresh water or steam cleaning and pH testing of surface,or non-combustible solvents(e.g.,1,1,1 trichloroethane)for pre-surface preparation solvent cleaning(note:use only non-chlorinated solvents for stainless steel to avoid chloride-induced stress corrosion cracking).If substituti

50、ons are made,verify that they meet SSPC SP1 and/or the product data sheet.Combustible gas indicators should be used to verify that the concentration of flammable vapors is below the LFL.Combustible gas indicators must be calibrated in accordance with manufacturersrecommendations and must be approved

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