1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 10240:1998 The Euro
2、pean Standard EN 10240 : 1997 has the status of a British Standard ICS 23.040.10; 25.220.40; 77.140.75 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Internal and/or external protective coatings for steel tubes Specification for hot dip galvanized coatings applied in automati
3、c plantsThis British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1998 BSI 1998 The following BSI references relate to the work on this standard: Committee reference ISE/
4、16 Draft for comment 94/340829 DC ISBN 0 580 29525 7 BS EN 10240:1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 10240:1997. The UK participation in its preparation was entrusted to Technical Committee
5、 ISE/16, Protective coatings and linings of metal pipes and fittings, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related
6、 international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Whilst this standard refers to hot dip galvanized coatings applied in automatic plants the definition given in 3.9 does not exclu
7、de hot dip galvanizing produced in plants where tubes are hot dip galvanized and handled individually at withdrawal from the hot dip galvanizing bath using mechanical devices such as tongs. Cross-references The British Standards which implement international or European publications referred to in t
8、his document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. User
9、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover.CEN Euro
10、pean Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10240 : 1997 E EU
11、ROPEAN STANDARD EN 10240 NORME EUROPE ENNE EUROPA ISCHE NORM December 1997 ICS 23.040.10; 25.220.40; 77.140.75 Descriptors: Metal coatings, galvanizing, hot dip galvanizing, steel tubes, specifications, quality, thickness, adhesion, area, inspection, tests, marking English version Internal and/or ex
12、ternal protective coatings for steel tubes Specification for hot dip galvanized coatings applied in automatic plants Reve tements inte rieur et/ou exte rieur des tubes en acier Spe cifications pour reve tements de galvanisation a chaud sur des lignes automatiques Innere und/oder a uere Schutzu berzu
13、 ge fu r Stahlrohre Festlegungen fu r durch Schmelztauchverzinken in automatisierten Anlagen hergestellte U berzu ge This European Standard was approved by CEN on 9 August 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
14、uropean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (Engl
15、ish, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Repu
16、blic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 10240:1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee ECISS/TC 29, Steel tubes and fitti
17、ngs for steel tubes, the secretariat of which is held by UNI. This 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 June 1998, and conflicting national standards shall be withdrawn at the latest by June
18、 1998. The European Committee for Iron and Steel Standardization (ECISS) instructed the Technical Committee ECISS/TC 29 to draw up a European Standard for hot dip galvanized coatings for steel tubes. This task has been undertaken by the subcommittee ECISS/TC 29/SC 4, the secretariat of which is held
19、 by the Association Franaise de Normalisation (AFNOR). The subcommittee has recognized that the quality required of a hot dip galvanized coating depends on the intended application of the steel tubes and it must relate to the capabilities of the process by which the coating is applied. Consequently
20、this standard specifies a number of coating qualities each with different coating requirements for hot dip galvanized coatings applied to steel tubes in automatic plants. The purchaser is required to specify one of these coating qualities in his enquiry and order. In respect of potential adverse eff
21、ects on the quality of water intended for human consumption, caused by the product covered by this standard: 1) this standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; 2) it should be noted that, while awaiting th
22、e adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. No EURONORM is replaced by this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the f
23、ollowing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 N
24、ormative references 3 3 Definitions 3 4 Designation of coating quality 4 5 Information to be supplied by the purchaser 4 6 Hot dip galvanizing process 4 7 General requirements of the coating 4 8 Special requirements of the coating 5 9 Inspection 6 10 Sampling 6 11 Inspection and test methods 6 12 Po
25、st galvanizing treatment 7 13 Marking 7 Annex A (normative) Condition of the tube to be coated 7 Annex B (normative) Method of determination of the local coating thickness using the magnetic method (ISO 2178) 8 Annex C (normative) Method of determination of the mass of the coating per unit area usin
26、g the gravimetric method (EN ISO 1460) 8 Annex D (informative) Guidelines for the galvanizers procedure for non-specific inspection and testing of coating quality A.1 in accordance with EN 10021 - Frequency of inspection and testing 8Page 3 EN 10240:1997 BSI 1998 1) In preparation; until this docume
27、nt is published as a European Standard, a corresponding national standard should be agreed at the time of enquiry and order. 1 Scope 1.1 This European Standard specifies the requirements and tests for hot dip galvanized coatings applied to steel tubes hot dip galvanized in automatic plants (see 3.9)
28、 for the following: a) gas and water installations, including water intended for human consumption; b) other applications, e.g. scaffold tubes, structural hollow sections. NOTE 1 Subsequently in this European Standard, the term “tube” includes “hollow section”. NOTE 2 Hot dip galvanized coatings for
29、 steel tubes fabricated (see 3.10) subsequent to manufacture or hot dip galvanized in non-automatic plants are specified in prEN ISO 1461. Hot dip galvanized coatings for steel tube fittings and accessories are within the scope of subcommittee ECISS/TC 29/SC 3. 1.2 In addition to the requirements of
30、 this European Standard the general technical delivery requirements specified in EN 10021 apply. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text an
31、d the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. E
32、N 1179 Zinc and zinc alloys Primary zinc EN 10021 General technical delivery requirements for steel and iron products EN 10204 Metallic products Types of inspection documents (including amendment A1:1995) EN 10232 Metallic materials Tube (in full section) Bend test EN 10233 Metallic materials Tube F
33、lattening test prEN 10266 1) Steel tubes, fittings and structural hollow sections Definitions and symbols for use in product standards EN ISO 1460 Metallic coatings Hot dip galvanized coatings on ferrous materials Gravimetric determination of the mass per unit area prEN ISO 1461 1) Hot dip galvanize
34、d coatings on fabricated ferrous products Specification EN ISO 1463 Metallic and oxide coatings Measurement of coating thickness Microscopical method EN ISO 9001 Quality systems Model for quality assurance in design, development, production, installation and servicing EN ISO 9002 Quality systems Mod
35、el for quality assurance in production, installation and servicing ISO 2178 Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method 3 Definitions For the purpose of this European Standard, the following definitions apply, in addition to those of prEN 10266: 3.1
36、hot dip galvanizing formation of a coating of zinc and/or zinc-iron alloys produced by dipping prepared steel in molten zinc 3.2 hot dip galvanized coating (subsequently referred to as “the coating”) the coating consisting of zinc-iron alloys usually covered by zinc, obtained by hot dip galvanizing
37、3.3 coating mass the total mass of zinc and/or zinc-iron alloys per unit area of surface (expressed in grams per square metre, g/m 2) 3.4 coating thickness the total thickness of zinc and/or zinc-iron alloys (expressed in micrometres,mm) 3.5 local coating thickness the mean value of coating thicknes
38、s obtained from the specified number of measurements within a reference area for a magnetic test or determined from the single value from a gravimetric test 3.6 local coating mass the value of coating mass obtained from a single gravimetric testPage 4 EN 10240:1997 BSI 1998 3.7 significant surface t
39、he whole of the inside and/or outside surfaces of the tube depending upon the application, but excluding the end faces 3.8 reference area an area of significant surface within which a specified number of single measurements of coating thickness is to be made 3.9 automatic plant a plant in which tube
40、s are hot dip galvanized and mechanically handled individually at withdrawal from the hot dip galvanizing bath 3.10 fabricated manipulated, e.g. welded, bent, assembled 4 Designation of coating quality For the coatings specified in this European Standard, the quality designation shall consist of one
41、 of the following to identify the intended application of the tube: a) A for gas and water installations, including water intended for human consumption; b) B for other applications; followed by a full stop and a number to identify the special requirements for that application (see 8.2.1 and table 1
42、), e.g. A.3. 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information, when appropriate, shall be supplied by the purchaser to the galvanizer at the time of enquiry and order: a) the number of this European standard; b) the designation of coating quality (see
43、 clause 4); c) the product standard to which the tubes to be galvanized were manufactured. 5.2 Options A number of options are permitted by this European Standard, and they are listed below with the appropriate clause references. Where the purchaser identifies an option he shall include it in his en
44、quiry and order. In the event that the purchaser does not indicate his wish to implement an option, the galvanizer shall supply in accordance with the base specification: 1) the minimum local coating thickness on the outside surface is specified. This option applies to coating qualities A.1, A.2 and
45、 A.3 only, and the purchaser shall indicate the minimum local coating thickness required (see 8.2.1c); 2) the chemical composition of the coating shall comply with 8.2.1 f). This option applies to coating qualities A.2 and A.3 only; 3) the minimum local coating thickness required is in excess of 55m
46、m. This option applies to coating quality B.1 only and the purchaser shall indicate the minimum coating thickness required (see 8.2.2), e.g. as specified in prEN ISO 1461; 4) the type of post galvanizing treatment is specified. The purchaser shall indicate the type of post galvanizing treatment requ
47、ired (see clause 12); 5) a post galvanizing treatment is precluded (see clause 12). 6 Hot dip galvanizing process 6.1 The galvanizer and the stockist, where products are supplied through a stockist, shall operate a quality system in accordance with EN ISO 9002. NOTE This requirement is also fulfille
48、d by a quality system in accordance with EN ISO 9001. 6.2 The zinc added to the galvanizing bath shall contain a total of impurities (other than iron and tin) specified in EN 1179 not exceeding 1,5 %. 7 General requirements of the coating NOTE The surface quality, thickness and adhesion of the coati
49、ng may be influenced by the surface condition of the tubes to be coated (see annex A). 7.1 Surface The coating on both the inside and outside surfaces shall be continuous, smooth and free from flux residues on the significant surface. NOTE White marks on the surface of the coating (commonly known as “wet storage stain”) are permitted if the requirements for the coating thickness are met. 7.2 Thickness The coating thickness on the significant surface (inside and/or outside as applicable) shall compl
