GRP tanks and vessels for use above ground - Part 2: Composite materials - Chemical resistance

This European Standard gives requirements for chemical resistance of composite materials used for GRP tanks and vessels for storage or processing of fluids, for use above ground. The tanks or vessels may be factory made or site built, with or without lining.

Oberirdische GFK-Tanks und -Behälter - Teil 2: Verbundwerkstoffe - Chemische Widerstandsfähigkeit

Diese Europäische Norm enthält die Bedingungen für die Berücksichtigung der chemischen Widerstandsfähigkeit der Verbundwerkstoffe bei der Bemessung oberirdischer GFK-Tanks und -Behälter zur Lagerung und Behandlung von Fluiden (Flüssigkeiten, Dämpfe, Gase). Die Tanks bzw. Behälter werden mit oder ohne Auskleidung im Werk oder auf der Baustelle hergestellt.

Réservoirs et récipients en PRV pour utilisation hors sol - Partie 2: Matériaux composites - Résistance chimique

La présente Norme européenne donne des exigences relatives a la résistance chimique des matériaux composites utilisés pour les réservoirs et récipients en PRV pour le stockage ou le traitement de fluides pour applications hors sol. Les réservoirs ou récipients peuvent etre fabriqués en usine ou construits sur site, avec ou sans revetement.

Nadzemni rezervoarji iz armiranega poliestra – 2. del: Kompozitni materiali – Kemijska obstojnost

General Information

Status
Published
Publication Date
31-May-2004
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jun-2004
Due Date
01-Jun-2004
Completion Date
01-Jun-2004

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.GRP tanks and vessels for use above ground - Part 2: Composite materials - Chemical resistanceNadzemni rezervoarji iz armiranega poliestra – 2. del: Kompozitni materiali – Kemijska obstojnostRéservoirs et récipients en PRV pour utilisation hors sol - Partie 2: Matériaux composites - Résistance chimiqueOberirdische GFK-Tanks und -Behälter - Teil 2: Verbundwerkstoffe - Chemische WiderstandsfähigkeitTa slovenski standard je istoveten z:EN 13121-2:2003SIST EN 13121-2:2004en23.020.10ICS:SLOVENSKI

STANDARDSIST EN 13121-2:200401-junij-2004

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13121-2October 2003ICS 23.020.10English versionGRP tanks and vessels for use above ground - Part 2:Composite materials - Chemical resistanceRéservoirs et récipients en PRV pour utilisation hors sol -Partie 2: Matériaux composites - Résistance chimiqueOberirdische GFK-Tanks und -Behälter - Teil 2:Verbundwerkstoffe - Chemische WiderstandsfähigkeitThis European Standard was approved by CEN on 26 June 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13121-2:2003 E

EN 13121-2:2003 (E)2ContentsPageForeword......................................................................................................................................................................3Introduction.................................................................................................................................................................41Scope..............................................................................................................................................................52Normative references....................................................................................................................................53Definitions.......................................................................................................................................................54Protective layers............................................................................................................................................65Determination of partial design factor, A2...................................................................................................7Annex A (normative)

Determination of partial design factor, A2, in accordance with media lists....................12Annex B (normative)

Determination of partial design factor, A2, by service experience...................................21Annex C (informative)

Evaluation of partial design factor, A2, by testing in situ or by laboratory testing......22Annex Z (informative)

Relationship between this European Standard .............................................................31Annex ZA and the

Essential requirements of EU Directive 97/23/EC (PED)......................................................31

EN 13121-2:2003 (E)3ForewordThis document (EN 13121-2:2003) has been prepared by Technical Committee CEN/TC 210 “GRP tanks andvessels”, the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by April 2004, and conflicting national standards shall be withdrawn at the latest byApril 2004.This European Standard has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association and supports essential requirements of EU Directive 97/23/EC.For relationship with this European Directive see informative Annex ZA, which is an integral part of this standard.This standard is Part 2 of EN 13121 which in total covers materials, design, manufacture, inspection, delivery,installation and maintenance of GRP tanks and vessels for use above ground. This Part 2 specifies requirementsfor chemical resistance of composite materials used for GRP tanks and vessels for the storage or processing offluids, for use above ground. The tanks and vessels may be factory made or site built, with or without lining.Annexes A and B are normative. Annex C is informative.This document includes a bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.

EN 13121-2:2003 (E)4IntroductionEuropean Standard EN 13121 consists of the following parts under the general title "GRP tanks and vessels for useabove ground":Part 1 — Raw materials — Specification conditions and acceptance conditionsPart 2 — Composite materials - Chemical resistancePart 3 — Design and workmanshipPart 4 — Delivery, installation and maintenanceThese four parts together define the responsibilities of the tank or vessel manufacturer, the materials manufacturersor suppliers and the purchaser.The design and manufacture of GRP tanks and vessels involve a number of different materials such as resins,thermoplastics and reinforcing fibres and a number of different manufacturing methods. It is implicit that tanks andvessels conforming to this Standard should be made only by manufacturers who are competent and suitably equippedto fulfil all requirements, using materials manufactured by competent and experienced material manufacturers.EN 13121-1 gives the requirements necessary to establish that the GRP material and any thermoplastic lining willhave the required chemical and thermal resistance to the service conditions.

EN 13121-1 specifies the requirementsfor the specification conditions and acceptance conditions for GRP and thermoplastic materials, which are necessaryin order to establish the chemical resistance properties of these materials in accordance with this Part of the standard.EN 13121-2 gives the requirements necessary to establish that the GRP material and any thermoplastic lining willlhave sufficient chemical and thermal resistance to service conditions. Part 2 defines the requirements for theprotective layer and the structural laminate as well as defining methods for proof of suitability to meet thechemical/thermal effects caused by the fluids and of determination of the partial design factor, A2, as required fordesign in accordance with prEN 13121-3. Five methods are described — use of Media Lists, use of resinmanufacturers data, use of thermoplastics manufacturers data, service experience and sample testing. Themanufacturer of the tank or vessel may choose any one of these methods subject to here being sufficient dataavailable in that method for the particular application.Together with the requirements and acceptance conditions for the raw materials determined in EN 13121-1, thedesign and workmanship requirements as determined in prEN 13121-3 and the delivery, handling, installation andmaintenance recommendations given in EN 13121-4, EN 13121-2 completes the total standard's requirements.

EN 13121-2:2003 (E)51 ScopeThis European Standard gives requirements for chemical resistance of composite materials used for GRP tanks andvessels for storage or processing of fluids, for use above ground. The tanks or vessels may be factory made or sitebuilt, with or without lining.2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. For datedreferences, subsequent amendments to or revisions of any of these publications apply to this European Standard onlywhen incorporated in it by amendment or revision. For undated references, the latest edition of the publicationreferred to applies.EN 59, Glass reinforced plastics — Measurement of hardness by means of a Barcol impressor.EN 590, Automotive fuels — Diesel - Requirements and test methods..EN 13121-1:2003, GRP tanks and vessels for use above ground — Part 1: Raw materials — Specificationconditions and acceptance conditions.prEN 13121-3, GRP tanks and vessels for use above ground — Part 3: Design and workmanship.EN 13121-4, GRP tanks and vessels for use above ground — Part 4: Delivery, installation and maintenance.EN ISO 4599, Plastics — Determination of resistance to environmental stress cracking (ESC) — Bent strip method(ISO 4599:1986).EN ISO 6252, Plastics — Determination of Environmental Stress Cracking (ESC) — Constant-tensile-stressmethod (ISO 6252:1992).EN ISO 14125:1998, Fibre-reinforced plastic composites — Determination of flexural properties (ISO 14125:1998).ISO 1172, Textile-glass-reinforced plastics. Prepregs, moulding compounds and laminates — Determination of thetextile-glass and mineral-filler content — Calcination methods.ISO 4433-1, Thermoplastics pipes — Resistance to liquid chemicals — Classification – Part 1: Immersion testmethod.ISO 4433-2, Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 2: Polyolefin pipes.ISO 4433-3, Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 3: Unplasticizedpoly(vinyl chloride) (PVC-U), high-impact poly(vinyl chloride) (PVC-HI) and chlorinated poly(vinyl chloride) (PVC-C)pipes.ISO 4433-4, Thermoplastics pipes — Resistance to liquid chemicals — Classification — Part 4: Poly(vinylidenefluoride) (PVDF) pipes.3 DefinitionsFor the purposes of this standard in addition to the definitions given in EN 13121-1:2003, the following definitionsapply:3.1resin layer (RL)a layer of resin with or without additives in accordance with clause 7 of EN 13121-1:2003, but without nonwovensor any other fibre

EN 13121-2:2003 (E)63.2veil layer (VL)a layer of resin with or without additives in accordance with clause 7 of EN 13121-1:2003, with one or two surfacenonwovens3.3single protective layer (SPL)a protective layer of resin with or without surface nonwovens to meet slight or less significant effects caused byservice conditions3.4chemical resistant layer (CRL)a protective layer of resin with or without surface nonwovens to meet more significant or major effects caused byservice conditions.3.5thermoplastic lining (TPL)a protective using thermoplastic materials as a lining to meet effects caused by service conditions3.6samplea piece of laminate or thermoplastic sheet for purposes of testing3.7specimena piece of a sample prepared for purposes of testing3.8test piecea piece of a specimen for purposes of mechanical testing only3.9maximum temperature Tmtemperature given by the resin manufacturer or the thermoplastics manufacturer referring to a specified fluid3.10maximum design temperature Tdmaximum temperature for determination of the partial design factor, A2, by different methods of this standard.4 Protective layers4.1 General requirementsThe inner surface of all laminates shall consist of a protective layer. The protective layer shall be either a singleprotective layer (SPL) or a chemical resistant layer (CRL) or a thermoplastic lining (TPL).The type of protective layer shall be selected on the basis of the ability to prevent, or limit to an acceptable level,chemical attack on the laminate. In order to do this, it shall be chemically resistant to the service conditions, allowlimited diffusion of service fluids and shall not suffer environmental stress cracking. The TPL may require stressrelief to prevent environmental stress cracking, see prEN 13121-3.The required thickness of the protective layer shall be in accordance with Table 1.When required, flammability and/or electrical conductivity shall be taken into account and/or the protective layershall be selected on the basis of its ability to maintain the purity of the service fluids.The requirements for workmanship of the protective layer are defined in prEN 13121-3.For application in contact with foodstuffs the relevant regulations shall be considered.

EN 13121-2:2003 (E)7Table 1 — Required thicknesses of protective layersProtective layer Required thicknessmmSPL0,4 to 0,6CRL2,5 to 4,0PVC-U3,0 to 4,5PP-H, -B, -R3,0 to 6,0PVDF2,4 to 4,0E-CTFE, FEP, PFA1,7 to 4,04.2 Single protective layer (SPL)The single protective layer SPL) shall be either a veil layer (VL) or a resin layer (RL).4.3 Chemical resistant layer (CRL)The chemical resistant layer (CRL) shall be a single or double veil layer (VL) followed by a layer or layers of eitherchopped strand mat or sprayed fibres with a total mass per unit area greater than or equal to 900 g/m2. The fibrecontent shall be between 25 % and 35 % by mass.Following the veil layer (VL), the subsequent chopped strand mats or sprayed fibres shall be applied before cure.4.4 Thermoplastic lining (TPL)All parts of the lining shall be manufactured from the same or compatible grade of material.Linings of PVC-U are to be treated initially using a solvent based primer or the initial contact layer shall be appliedusing a specific bonding resin. Linings of PP, PVDF, E-CTFE, FEP or PFA shall have a glass or synthetic fibrefabric backing — branches up to 100 mm diameter may use chemically etched E-CTFE or PVDF linings.The initial contact layer applied directly to the thermoplastic lining shall be reinforced with chopped strand mat with300 g/m2 to 450 g/m2. The minimum bond strength of the reinforcement to the lining shall be in accordance withprEN 13121-3.Subsequent to any forming or machining, the specified thickness shall be maintained. This may require initial use ofa thicker lining material.5 Determination of partial design factor, A25.1 GeneralThis clause defines the methods for determining the partial design factor, A2, used for establishing the design factor Kand the design factor F in accordance with prEN 13121-3.Five methods are described and are summarised in Table 2; together with the maximum design temperature, Td,applicable to each particular method.The methods listed provide for situations where there are common material-/media lists given in annex A ormanufacturers' data for resins or thermoplastics are available, and where there is documented service experienceavailable in annex B or testing is required. Testing may be carried out in a laboratory and/or in-situ in an existing plantitem by procedures given in annex C.An overall view of handling these methods is given in figure 1.

EN 13121-2:2003 (E)8service conditions (media / temperatures)clause 5.2media listsmediacateg. 1table A.1mediacateg. 2table A.3mediacateg. 3table A.5SPLCRLTPLSPLCRLCRLtable A.6TPLtable A.8table A.2table 4table A.4table A.7table 4manufacturer'sdataclause 5.5serviceexperienceclause 5.6test proceduresclause 5.3SPL, CRLclause 5.4TPLannex Bannex Ctable 3table 4Figure 1 — Determination of partial design factor, A2

EN 13121-2:2003 (E)9It will often be possible to specify the partial design factor, A2, by more than one of the above methods. In such casesit is permissible to choose the method which gives the lowest value of A2.The absence of data for a particular method is not indicative that a resin or TPL is unsuitable, it usually implies onlythat the service condition has not been studied using that particular method. This is especially so for the media listswhich only give data for temperatures as shown in Table 2, for higher service temperatures, other methods may beused.With regard to the service conditions, three possible situations can arise:a) The service conditions can be considered identical to those for which data already exists. In this case themethods listed can be used directly.b) The service conditions are sufficiently similar to those for which data already exists to allow direct use of theexisting data. In this case a judgement on degree of similarity and use of existing data is required.c) The service conditions are significantly different to any previously encountered and only those methodspertaining to the evaluation of test laminates shall be used.It is particularly important that the chemical resistance is verified for the full range of service conditions, including anytrace impurities e. g. organics or fluorides, and transient temperatures. In some cases there will be a need to take intoaccount that the protective layer may be exposed to different phases of the service fluids, e. g. gas and liquid, and thephase boundary between them.Table 2 — Maximum design temperature, Td, used for determination of thepartial design factor, A2Maximum design temperature, TdMethod of determination bySPLCRLPVC-UPP-HPP-BPP-RPVDFE-CTFEFEPPFAlists of media— of category 1 (see Table A.1)40 °C100 °C60 °C100 °C100 °C— of category 2 (see Table A.4)40 °C

80 °C60 °C
80 °C
80 °C— of category 3 (see Tables A.5 and A.8)n. a.
60 °C60 °C
60 °C

60 °Cresin manufacturer's data 40 °C120 °Cn. a.n. a.n. a.thermoplastics manufacturer's datan. a.n. a.60 °C100 °C120 °Cservice experience40 °C120 °C80 °C100 °C120 °Ctesting in laboratory/in-situ40 °C120 °C80 °C100 °C120 °C

n. a. = not applicable5.2 Determination of partial design factor, A2 by using media listsThe media lists when used with protective layers in accordance with clause 4, at different temperatures andconcentrations, are given in annex A.Use of media lists is only applicable when considering use of a resin described in the resin groups in accordance withEN 13121-1. For other polyester, vinyl ester, furance and phenolic resins which are not in a resin group in accordancewith EN 13121-1, then methods 5.3, 5.5 or 5.6 shall be used.The list of media given in Annex A is not a comprehensive list of all media for which this Standard may be used.Additional data may be found using methods 5.3, 5.4 or 5.5

EN 13121-2:2003 (E)10The lists do not apply for temperatures above 100 °C for category 1 media, not above 80 °C for category 2 media, notabove 60 °C for category 3 media and for mixtures of media.The lists apply to parts which have been either post-cured or not post cured in accordance with the recommendationsof the resin manufacturer. By post cure is meant that the laminate shall be maintained for a minimum of 4 h at aminimum temperature of 80 °C or the HDT of the resin or in accordance with the recommendation of the resinmanufacturer.The partial design factor, A2, is determined by taking account of the category of media, temperature, type of protectivelayer and resin group in accordance with the Table 2 of EN 13121-1:2003, type of fibre and post curing.5.3 Determination of partial design factor, A2 using resin manufacturer's data5.3.1 Chemical resistance information supplied by resin manufacturersThe chemical resistance information supplied by resin manufacturers shall include details related to the cure of thematerial from which maximum temperatures, Tm, for different service conditions were determined; for example timeand temperature of cure including post cure and heat deflection temperature (HDT).5.3.2 Minimum HDTThe HDT of the cured resin of the tank or vessel shall be at least 20 °C higher than the maximum designtemperature, Td.The maximum temperature, Tm, shall only be used by the manufacturer if the resin manufacturer's

recommendedconditions of cure and post cure will be followed during manufacture.5.3.3 Partial design factor A2The partial design factor, A2, using SPL or CRL, shall be determined in relation to the resin manufacturer'smaximum temperature, Tm, for the service conditions and the maximum design temperature, Td.The interpretation of resin manufacturer's maximum temperature, Tm, data in terms of A2, is given in Table 3.Table 3 — Partial design factor, A2, relating to the maximum designtemperature, Td, and the maximum temperature, TmMaximum design temperature, Td°CA2post curedaTd = Tm1,4Td = Tm – 101,4Td = Tm – 201,3Td = Tm – 301,3Td = Tm – 401,2Td = Tm – 501,2Td = Tm – 601,1Td = Tm – 701,1aConditions as given in 5.2 or subject to agreement with the resin manufacturer.

EN 13121-2:2003 (E)115.4 Thermoplastics manufacturer's dataUse of chemical resistance data published by the manufacturer of the thermoplastic material or the manufacturer ofthe thermoplastic lining shall be restricted to data on materials which meet the characteristic properties of EN 13121-1.Direct use of the above data shall be restricted to those service conditions for which the material or lining manufac-turer gives a recommendation of suitability in the manufacturer's highest category.In some cases, referring to the manufacturer of the thermoplastic material or lining, environmental stress crackingshall be considered by a sufficiently low stress level in production and service.When the service fluids include organic media or their mixtures, diffusion may occur that is detrimental to the TPLbond to the structural laminate. Reference shall be made to service experience or test data for such media before finalacceptance.Table 4 gives the minimum values for the partial design factor, A2, to be used at different design temperatures.Table 4 — Partial design factor, A2, relating to the maximum design temperature, Td, for TPLMaximum design temperature, Td°CTPL MaterialA2 = 1,1A2 = 1,2 PVC-U60— PP-H, PP-B, PP-R80100 PVDF, E-CTFE, FEP, PFA80120aaSubject to relevant service experience; see 5.5 and 5.6.5.5 Service experienceThis method takes account of situations where equipment is already in use containing the same or a similar serviceconditions. The equipment shall be in the form of an existing tank or vessel or as a pipe conveying the fluid.The partial design factor, A2, shall be evaluated by procedures given in annex B.In all cases, the value of the partial design factor, A2, shall be applicable to the same resin or lining as originallyspecified.5.6 Test procedures Test procedures, given in Annex C, define the requirements for testing and assessment of laminates with SPL,CRL or TPL in order to determine their suitability and to evaluate the partial design factor, A2. Testing should becarried out by exposing specimen or samples of the material to the service fluid at the design temperature forspecified times.In testing the material may be exposed with stress or without stress and the material may be one side exposed tothe test fluid or fully immersed.Consideration is given, whether the material may might suffer environmental stress cracking in service. When thisis considered possible, the suitability of the material should be qualified by testing with stress.As a first result of tests, materials may be rejected as "unsuitable" or accepted as "suitable". Following qualificationof the material as "suitable", the method given in C.3 then enables the determination of the partial design factor, A2.

EN 13121-2:2003 (E)12Annex A(normative)Determination of partial design factor, A2, in accordance with media listsA.1 Category 1 mediaCategory 1 media are listed in Table A.1.For maximum design temperature40 °C, the protective layer shall be a SPL or a CRL or TPL. For maximum designtemperatures > 40 °C but100 °C, the protective layer shall be a CRL or a TPL.The value of the partial design factor A2 for TPL shall be in accordance with Table 4. The value of the partial designfactor A2 for SPL and CRL protective layers shall be in accordance with Table A.2.Table A.1 — Category 1 mediaMediumMediumMediumMedium Ammonium Bromate, aq Nickel Sulphate, aqSodium Nitrate, aq Ammonium Bromide, aq Paraffin Wax Sodium Phosphate, aq Ammonium Chloride, aq Potassium Aluminium Sulphate, aq Sodium Sulphate, aq Ammonium Nitrate, aq Fatty acids (> 12 C-atoms), e.g. Oleic acid

Palmitic acid Stearic acid Potassium Bromate, aq Sodium Sulfite, aq Ammonium Phosphate, aq Potassium Bromide, aq Sodium Thiosulphate, aq Ammonium Sulphate, aq Potassium Chlorate, aq Starch, aq (5pH8) Barium Chloride, aq Potassium Chloride, aq Barium Nitrate, aq Fruit syrups (3pH8), e.g. Beet syrup Raspberry syrup Starch syrup Potassium Chromate, aq Brine, aq, sat Magnesium Chloride, aq Potassium Ferric Cyanide, aq Calcium Chloride, aq Magnesium Nitrate, aq Potassium Ferrous Cyanide, aq Calcium Nitrate, aq Magnesium Sulphate, aq Potassium Iodide, aq Sugar, e.g. GalactoseGlucose, SorbitolFructoseMannose, Mannitol Calcium Sulphate, aq Manganese-II-Chloride, aq Potassium Nitrate, aq Cobalt Chloride, aq Manganese-II-Nitrate, aq Potassium Nitrite, aq Cobalt Nitrate, aq Manganese-II-Sulphate, aq Potassium Phosphate, aq Copper-I-Chloride, aq Mercury Potassium Sulphate, aq Copper-II-Chloride, aq Mercuric-I-Chloride Seawater (3pH8) Vegetable Oil, e.g. castor oilcotton seed oilsoya oilwheat germ oil Copper-II-Nitrate, aq Mercuric-II-Chloride Silicon Oil/Grease Copper-I-Sulphate, aq Mercuric-II-Nitrate Sodium Bromate, aq Copper-II-Sulphate, aq Molasses (3pH8) Sodium Bromide, aq Diesel Oil, fuel oil (EN 590) Nickel Chloride, aq Sodium Chlorate, aq (no aromatics, no methanol) Nickel Nitrate, aq Sodium Chloride, aqNOTEFor higher temperatures other methods may be used; see 5.5 and 5.6.

EN 13121-2:2003 (E)13Table A.2 gives the type of protective layer required for the category 1 media at various design temperatures. Inaddition, the corresponding A2-factors for post cured laminates are given.Table A.2 defines also the resin groups in accordance with Table 2 of EN 13121-1:2003, which shall be used for themedia of category 1 at various design temperatures.At temperatures up to 60 °C the resin used for the structural laminate may be different from the resin used for the SPLor CRL. At temperatures above 60 °C a change of the resin shall only be permitted if relevant data of service, test orof the resin manufacturer are available.NOTEWhen using different resins the thickness of the SPL or CRL may be required to be increased.Table A.2 — Resin groups to be used for protective layers and structural laminates in contact with media ofcategory 1 and partial design factors, A2, for category 1 media at maximum design temperatures TdResin groupsMaximum designtemperature, TdSPLCRLStructuralLaminateA2post curedaTd

30 °C1A-81A-81A-81,130 °C < Td
40 °C1B-81B-81A-81,240 °C < Td
60 °C use other
methods3-83-81,360 °C < Td
80 °C use other
methods4-84-81,480 °C < Td 100 °C use other

methods6-86-81,4NOTE 1Resin groups 1A-8 see Table 2 of EN 13121-1:2003.NOTE 2For higher temperatures other methods may be used; see 5.5 and 5.6.aConditions as given in 5.2 or subject to agreement with the resin manufacturer.A.2 Category 2 mediaCategory 2 media are listed in Table A.3.For maximum design temperatures, Td, 40 °C, the protective layer shall be a SPL or a CRL or a TPL. Formaximum design temperatures Td, > 40 °C but80 °C, the protective layer shall be a CRL or a TPL. The value ofthe partial design factor, A2, for SPL and CRL shall be in accordance with Table A.4. The value of the partial designfactor, A2, for TPL protective layer shall be in accordance with 5.4, Table 4 taking into account the maximum designtemperature, Td, for each lining material given in Table A.3.

EN 13121-2:2003 (E)14Table A.3 — Maximum design temperature, Td, for category 2 mediaCRLPVC-UPP-H,PVDF,FEP,PP-B,E-CTFEPFAPP-RTdTdTdTdTdMedium°C°C°C°C°C Adipic Acid, aq8045802580 Alcohols (2 to 10 C-atoms),20 % aqa e.g.Ethanol6040606060Isobutanol40———80Isodecanol60———80Isopropanol5025606080Propanol6025606080 Benzoic Acid, aq8040808080 Boric Acid, aq8040808080 Citric Acid, aq ( 50 %)8040808080 Glycols e.g.Butanediol 1,28025256080Butanediol 1,380———80Butanediol 1,48025606080Diethylene Glycol80———80Dipropylene Glycol80———80Ethylene Glycol8060808080Glycerin8060808080Neopentyl Glycol65———801,2-Propylene Glycol80———80Triethylene Glycol80———80Tripropylene Glycol65———80 Hydrocarbons (5 to 10 C-atoms) e.g.Pentanes/Pentenes ( 50 °C)7025258080Hexanes/Hexenes ( 50 °C)7025—8080Heptanes/Heptenes80——8080Octanes/Octenes80——8080Nonanes/Nonenes80——8080Decanes/Decenes80——8080 Lactic Acid, aq ( 10 %)8025802580 Phosphoric Acid, aq ( 80 %)8060808080 Phthalic Acid(s)8025608080 Phthalates/Phthalic ester6530303080 Potassium Fluoride, aqb6060808080 Sodium Acetate, aq8060808080 Sodium Bicarbonate, aq8060808080 Sodium Fluoride, aqb6065808080 Sodium Tetraborate (Borax), aq8040808080 Succinic Acid, aq8060606080 Tartaric Acid, aq8025606080 Urea, aq (5pH8)6060606080 Water, not deionised or destilled8060808080ahigher concentration see Table A.5, media class VIII.bsynthetic or carbon veils/nonwovens shall be usedNOTEFor higher temperatures see other methods; see 5.5 and 5.6.

EN 13121-2:2003 (E)15Table A.4 gives the type of protective layer which shall be used for the media of category 2 at the various tempera-tures. In addition, the A2-factors for post cured laminates are given.Table A.4 defines the resin groups in accordance with Table 2 of EN 13121-1:2003, which shall be used for the mediaof category 2 at the various temperatures.With the exception of phosphoric aci

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