1、BRITISH STANDARDBS EN 14832:2005Petroleum and related products Determination of the oxidation stabilityand corrosivity offire-resistantphosphate ester fluidsThe European Standard EN 14832:2005 has the status of a British StandardICS 75.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g
2、44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14832:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 July 2005 BSI 28 July 2005ISBN 0 580
3、 46408 3National forewordThis British Standard is the official English language version of EN 14832:2005.The UK participation in its preparation was entrusted to Technical Committee PTI/13, Petroleum testing and terminology, which has the responsibility to: aid enquirers to understand the text; pres
4、ent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be
5、 obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence Index”, or by using the “Search” facilit
6、y of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Sum
7、mary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME
8、 EUROPENNEEUROPISCHE NORMEN 14832June 2005ICS 75.080English versionPetroleum and related products - Determination of the oxidationstability and corrosivity of fire-resistant phosphate ester fluidsPtrole et produits connexes - Dtermination de la stabilit loxydation et de la corrosivit des fluides dif
9、ficilementinflammables base desters phosphatesMinerallerzeugnisse und verwandte Produkte -Bestimmung der Oxidationsbestndigkeit und derEinwirkung auf Metallwerkstoffe von schwerentflammbarenFlssigkeiten auf der Basis von PhosphorsureesternThis European Standard was approved by CEN on 25 May 2005.CEN
10、 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 applic
11、ation to the Central Secretariat 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 Central Secretariat has the
12、same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Sl
13、ovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN na
14、tional Members.Ref. No. EN 14832:2005: EEN 14832:2005 (E) 2ContentsPage Foreword 31 Scope .42 Normative references .43 Terms and definitions.44 Principle.55 Reagents and materials56 Apparatus 67 Samples and sampling .98 Preparation of glassware99 Preparation of metal test pieces 910 Procedure 1011 C
15、alculation.1012 Expression of results1113 Precision1114 Test report .12Bibliography.13EN 14832:2005 (E)3Foreword This European Standard (EN 14832:2005) has been prepared by Technical Committee CEN/TC 19 “Petroleum products, lubricants and related products”, the secretariat of which is held by NEN. T
16、his European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. According to the CEN/CENELEC Internal Regulation
17、s, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
18、 Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14832:2005 (E)41 Scope This European Standard specifies a method for assessing the oxidation stability of phosphate ester hydraulic fluids. These products fall into category HFDR of EN ISO 6743-4 2 and into cate
19、gories TSD, TGD and TCD of ISO 6743-5 3. The amount of acid developed during the test and the mass changes of the metal specimens are used to assess the level of oxidation stability. The precision of the test method applies to changes in acid number up to 3,0 mg KOH/g and changes in mass of up to 3
20、mg per test piece. The change of acidity is determined using one of the test methods ISO 6618, ISO 6619, or ISO 7537. Results from two different test methods are not necessarily compatible and direct comparison needs caution. NOTE This test method may also be applied to other non-aqueous fire-resist
21、ant fluids, such as those falling into category HFDU of EN ISO 6743-4 2. WARNING The use of this European Standard may involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the
22、user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition
23、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10277-2, Bright steel products Technical delivery conditions Part 2: Steels for general engineering purposes EN ISO 2160, Petroleum products Corrosiveness to copper Copper stri
24、p test (ISO 2160:1998)EN ISO 3170, Petroleum liquids Manual sampling (ISO 3170:2004)EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987) ISO 6618, Petroleum products and lubricants Determination of acid or base number Colour-indicator titration method ISO 6
25、619, Petroleum products and lubricants Neutralization number Potentiometric titration methodISO 7537, Petroleum products Determination of acid number Semi-micro colour-indicator titration method3 Terms and definitions For the purposes of this European Standard, the following terms and definitions ap
26、ply. 3.1 oxidation stability sum of the changes in acid number of the fire-resistant fluid and of water in the absorption vessel when subjected to the accelerated oxidizing conditions specified in this document 3.2 corrosivity change in mass of specified metal test pieces subjected to the accelerate
27、d oxidizing conditions specified in this document EN 14832:2005 (E)54 Principle A test portion of fluid, of known acid number, is placed in a test vessel, which contains cleaned and weighed copper and steel test pieces. The fluid and test pieces are then subjected to a temperature of 120 C under an
28、oxygen flow rate of 1 l/h for 164 h. The exhausted gaseous acidic products of the oxidation are absorbed in water, and the acid number of this phase is determined. The acid number of the test portion and the mass of the test pieces are determined at the end of the test period, and the results are ca
29、lculated as the sum of the changes in acid number, and/or the change in mass of the individual test pieces. 5 Reagents and materials Unless otherwise specified, reagents shall be of recognized analytical grade. 5.1 Water, conforming to the requirements of grade 3 of EN ISO 3696.5.2 Oxygen, Minimum p
30、urity 99,4 %. 5.3 Phenolphthalein, 1 g/l ethanolic solution. 5.4 Potassium hydroxide, 0,1 mol/l ethanolic solution. 5.5 Wash solvent, use either 2,2,4-trimethylpentane or petroleum spirit with a boiling range of 60 C to 80 C for the metal test pieces. 5.6 Acetone.CAUTION Acetone is a flammable liqui
31、d and should be handled with appropriate care. 5.7 Strong oxidizing cleaning solution.The reference oxidizing cleaning solution, on which precision was based, is chromsulfuric acid (see the warning statement below), but alternative non-chromium containing solutions, such as ammonium persulfate in co
32、ncentrated sulfuric acid (8 g/l) have also been found to give satisfactory cleanliness. Other non-alkaline laboratory cleaning agents that are demonstrated to give equivalent cleanliness to chromsulfuric acid, may be used for routine analysis. CAUTION Chromsulfuric acid is a health hazard. It is tox
33、ic, a recognized carcinogen as it contains Cr-VI compounds, highly corrosive and potentially hazardous in contact with organic materials. When using chromsulfuric acid cleaning solution, eye protection and protective clothing are essential. Never pipette the cleaning solution by mouth. After use, do
34、 not pour cleaning solution down the drain, but neutralize it with great care owing to the concentrated sulfuric acid present, and dispose of it in accordance with standard procedures for toxic waste (chromium is highly dangerous to the environment). Non-chromium containing, strong oxidizing acid cl
35、eaning solutions are also highly corrosive and potentially hazardous in contact with organic materials, but do not contain chromium which has special disposal problems.5.8 Abrasives, silicon carbide paper or cloth of 65 m (grade 240) and of 30 m (grade 600) grit size. 5.9 Drying agent, molecular sie
36、ve with a pore size of 4 x 10-4m or other equivalent means for drying the oxygen (5.2). EN 14832:2005 (E)66 Apparatus 6.1 Heating block or heating bath Consisting of an aluminium block (see Figure 1) or an oil bath (see Figure 2), capable of maintaining a temperature in the test portion of 120 C 0,5
37、 C. It shall be fitted with an outer cover of non-asbestos thermal insulating material such that the surface temperature does not exceed 60 C. The design of the bath and test vessel supports shall ensure that the test vessel is heated over a length of 150 mm. In the case of an aluminium heating bloc
38、k, there shall not be a gap between the test vessel and the thermal insulation. In the case of an oil bath, the test vessel shall be immersed to a depth of 137 mm, and the distance from the bottom of the test vessel to the underside of the bath cover shall be 150 mm 2 mm. The gap between test vessel
39、 and bath cover shall be sealed by means of an O-ring. Key1 Aluminium block 2 Thermal insulation 3 Test vessel 4 O-ring Figure 1 Heating block EN 14832:2005 (E)7Key 1 Oil 2 Bath cover 3 Test vessel 4 O-ring 5 Test vessel support 6 Bottom heating bath Figure 2 Oil bath 6.2 Test vessels Constructed of
40、 borosilicate glass, of length 210 mm 2 mm, outer diameter 28 mm 0,5 mm, wall thickness 2 mm 0,2 mm, and fitted with a female tapered ground-glass joint of either 24/29 or 24/39 size. A second test vessel is used as the absorption vessel. 6.3 InsertsConstructed of borosilicate glass, with a male tap
41、ered ground-glass joint to fit into the test vessel and absorption vessel. They are equivalent to a wash-bottle insert, carrying a glass inlet tube of outside diameter 5 mm 0,4 mm and a wall thickness of 0,8 mm 0,1 mm, with the bottom tip bevelled at 30. The distance between the tip of the inlet tub
42、e and the bottom of the test vessel shall be 2,5 mm 0,5 mm when fitted. The inserts shall be fitted with a joint connector of suitable gas-tight design, such that two inserts fitted together give a horizontal distance of 100 mm to 200 mm between the test vessel and absorption vessel. Other joint con
43、nectors or connections like PTFE tubing may be used if they fulfil the requirements of this clause. The general arrangement is illustrated in Figure 3. EN 14832:2005 (E)8Key1 Oxygen inlet 2 Joint connector 3 Insert 4 Female tapered ground glass joint 5 Test vessel 6 Absorption vessel Figure 3 Genera
44、l arrangement of apparatus 6.4 Flowmeter, capable of measuring a flow rate of 1 l/h to the nearest 0,1 l/h. NOTE A suitable soap bubble flowmeter is illustrated in Figure 4. 6.5 Analytical balance, capable of weighing to the nearest 0,1 mg or better. 6.6 Copper test pieces, constructed from the copp
45、er specified in EN ISO 2160, of dimensions 60 mm 10 mm 2 mm. 6.7 Steel test pieces, manufactured from carbon steel of quality EN 10277-2 or equivalent, of dimensions 60 mm 10 mm 2 mm. 6.8 Cotton wool6.9 Cleaning brushes, small, hard and nylon-bristled. NOTE A toothbrush is suitable. 6.10 Oven, capab
46、le of being controlled at 100 C 2 C. EN 14832:2005 (E)9Figure 4 Soap bubble flowmeter 7 Samples and sampling 7.1 Unless otherwise specified samples shall be taken as described in EN ISO 3170 and/or in accordance with the requirements of national standards or regulations for the sampling of the produ
47、ct under test. 7.2 Laboratory samples shall be mixed thoroughly by shaking vigorously for 30 s before taking the test portion. The test portion shall not be filtered. 8 Preparation of glassware 8.1 The pre-cleaned test vessels shall be stored for at least 6 h in cleaning solution (5.7). 8.2 Rinse th
48、oroughly in tap water, followed by water (5.1). 8.3 Dry for 30 min in the oven (6.10), and cool to room temperature before weighing. 9 Preparation of metal test pieces 9.1 Carefully segregate the polishing materials and solvent to ensure that there is no transfer of removed material between the two
49、metals. Wear gloves or use forceps for all handling of the test pieces. 9.2 Polish the metal surfaces and edges with 65 m silicon carbide paper or cloth (5.8) until there is no more significant roughness and a fresh metal surface is exposed. 9.3 Polish the metal surfaces and edges with 30 m silicon carbide paper or cloth (5.8) until they are smooth and even. Use a new piece of paper or cloth for the final polish. EN 14832:2005 (E)109.4 Rub the surface with cotton wool (6.8) soa
