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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 10238 : 1997 The Eu
2、ropean Standard EN 10238 : 1996 has the status of a British Standard ICS 77.140.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Automatically blast cleaned and automatically primed structural steel products BS EN 10238 : 1997 This British Standard, having been prepared unde
3、r the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference ISE/12 Draft for comment 93/30941 DC ISBN 0 580 26888 8 Amendm
4、ents issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ISE/12, Steel wire, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Ass
5、ociation Ltd. British Railways Board British Iron and Steel Producers Association Department of Transport Institution of Structural Engineers Lloyds Register of Shipping National Association of Steel Stockholders Railway Industry Association of Great Britain Society of Motor Manufacturers and Trader
6、s Ltd. Steel Construction Institute Welding Institute BS EN 10238 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 102383 ii BSI 1997 BS EN 10238 : 1997 National foreword This British Standard has been prepared by Technical Committee IS
7、E/12 and is the English language version of EN 10238 : 1996, Automatically blast cleaned and automatically primed structural steel products, published by the European Committee for Standardization (CEN). Cross-references Publication referred toCorresponding British Standard EN 10021 : 1993BS EN 1002
8、1 : 1993 General technical delivery conditions EN 10204 : 1991BS EN 10204 : 1991 Metallic products. Types of inspection documents ISO 8501-1 : 1988BS 7079 : Group AVisual assessment of surface cleanliness Part A1 : 1989 Specification for rust grades and preparation grades of uncoated steel substrate
9、s and of steel substrates after overall removal of previous coatings ISO 8503-3 : 1988BS 7079 : Group C Surface roughness characteristics of blast-cleaned steel substrates Part C2 : 1989 Method for the grading of surface profile of abrasively blast-cleaned steel using a comparator Compliance with a
10、British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. CEN European Committee for Standardization Comite Europe
11、en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to all CEN members. Ref. No. EN 10238 : 1996 E EUROPEAN STANDARDEN 10238 NORME EUROPE ENNE EUROPA ISCHE NORM September 1996 ICS 77.140.10 Descriptors: Iron and stee
12、l products, shot blasted painted products, steels, prefabrication primers, designation, characteristics, manufacturing, preparation grade, thickness, welding, storage, marking, information English version Automatically blast-cleaned and automatically prefabrication primed structural steel products P
13、roduits en aciers de construction grenaille s et pre peints par traitement automatique Automatisch gestrahlte und automatisch fertigungsbeschichtete Erzeugnisse aus Bausta hlen This European Standard was approved by CEN on 1996-03-19. CEN members are bound to comply with the CEN/CENELEC Internal Reg
14、ulations which stipulate the conditions for giving this European 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
15、European Standard exists in three official versions (English, 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
16、national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 10238 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical
17、Committee ECISS/TC 10, Structural steels Qualities, of which the secretariat is held by NNI. 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 March 1997, and conflicting national standards shall be
18、 withdrawn at the latest by March 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
19、Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 3.1automatic blast cleaning3 3.2automatic priming3 3.3prefabrication primer3 4Information to be supplied by the purchaser3 4.1Mandatory information3
20、4.2Additional optional information3 5Designation4 6Manufacture4 7Preparation grade4 8Surface roughness4 9Prefabrication primers4 9.1Types of prefabrication primers4 9.2Measurement of primer thickness4 10Flame cutting and weldability5 11Handling and storage5 11.1 Handling5 11.2 Storage5 12Inspection
21、and testing5 13Marking5 Annex A (normative) Positions of test pieces for measuring the primer thickness6 Annex B (normative) Flame cutting welding7 Page 3 EN 10238 : 1996 BSI 1997 1 Scope This European Standard specifies requirements for automatically blast-cleaned and automatically prefabrication p
22、rimed structural steel products. This European Standard does not cover manual blast cleaning and/or manual spray painting. NOTE. Where the steel is less than 5 mm thick, care should be exercised to ensure it is not deformed by blast cleaning. 2 Normative references This European Standard incorporate
23、s by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place in the text and the publications listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standa
24、rd only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 10021Iron and steel products General technical delivery conditions EN 10025Hot-rolled products of non alloy structural steels Technical delivery conditions E
25、N 10113-2Hot-rolled products in weldable fine grain structural steels Delivery conditions for normalized/normalized rolled steels EN 10204Metallic products Types of inspection documents EN ISO 8503-2Preparation of steel substrates before application of paints and related products Surface roughness c
26、haracteristics of blast cleaned steel substrates Part 2: Method for the grading of surface profile of abrasive blast cleaned steel Comparator procedure ISO 2808Paints and varnishes Determination of film thickness ISO 8501-1Preparation of steel substrates before application of paints and related prod
27、ucts Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings 3 Definitions For the purposes of this standard the following definitions apply. 3.1 automatic blast cleaning The u
28、se of mechanical plant where the product being blast cleaned is passed through a machine where turbines are used to project the abrasive onto the steel in a uniform manner. 3.2 automatic priming After automatic blast cleaning, the product is primed by passing through a paint booth where reciprocatin
29、g paint guns apply a continuous coating to the required thickness. 3.3 prefabrication primer Prefabrication primer is a thin coating which is automatically applied to blast cleaned steel and serves to provide temporary corrosion protection for steel components during their processing, transport and
30、storage. 4 Information to be supplied by the purchaser 4.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: designation of the steel; type of prefabrication primer (see 9.1 and table 1); type of inspection document (clause 12). 4.2
31、Additional optional information preparation grade if different from Sa 2 (clause 7); surface roughness if specified (clause 8); dry film thickness if different from that given in 9.1; information on the manufacturing process (clause 6); flame cutting and weldability characteristics of prefabrication
32、 primers (clause 10); special requirements for marking (clause 13). position of test pieces (annex A). In the event that the purchaser does not indicate a wish to implement any of the additional information, the manufacturer shall supply the blast cleaned and primed product in accordance with the ba
33、sic specification. Page 4 EN 10238 : 1996 BSI 1997 5 Designation The products covered by this European Standard shall be designated as follows, in the order given: type of product (plate, beam, etc.); number of this European Standard (EN 10238); preparation grade (see clause 7); if the surface rough
34、ness is specified at the time of order, the agreed surface roughness; type of prefabrication primer (see 9.1); nominal prefabrication dry film thickness if it differs from that specified in this standard (see 9.1); designation of the steel following the appropriate standard. EXAMPLE 1: Designation o
35、f H heavy section made of steel S275N (or 1.0486) in accordance with EN 10113-2, with preparation grade Sa 2 coated with epoxy-zinc (EPZ). H heavy section EN 10238-Sa 2-EPZ 2 EN 10113-2 2 S275N; or H heavy section EN 10238-SA 2-EPZ 2 EN 10113-2 2 1.0486. EXAMPLE 2: Designation of a nominal dry film
36、thickness different from that specified in this standard and agreed at the time of enquiry and order and with a roughness also agreed at the time of order. Sheet made of steel S275JR (or 1.0044) in accordance with EN 10025 with preparation grade Sa 2 with roughness F, coated on both sides with polyv
37、inyl butyral-iron oxide (PVBF), with nominal thickness 15 mm: Sheet EN 10238-Sa 2-F-PVBF15 2 EN 10025 2 S275JR; or Sheet EN 10238-Sa 2-F-PVBF15 2 EN 10025 2 1.0044. 6 Manufacture The surface treatment process and application of prefabrication primer shall be at the manufacturers discretion. If speci
38、fied at the time of enquiry and order, this shall be provided to the purchaser. At the end of the production line, repairs to any damaged areas of the primer shall be undertaken to ensure they meet the requirements of this European Standard. 7 Preparation grade Unless otherwise agreed at the time of
39、 enquiry and order, the preparation grade, as specified in accordance with ISO 8501-1, shall be Sa 2 minimum. Appearance variations resulting from: the steel grade; surface condition of the steel; thickness of the steel; consequences of the heat treatment; marks from the fabrication of the steel sha
40、ll be deemed acceptable provided they do not affect the preparation grade. 8 Surface roughness At the time of enquiry and order, a surface roughness class may be specified, in which case it shall be given in the product designation using the symbols F for fine, M for medium and C for coarse. The mea
41、surement method shall be in accordance with ISO 8503-2. 9 Prefabrication primers 9.1 Types of prefabrication primers Table 1 lists the most commonly used groups of primers. The most usual nominal thickness specified is 20 mm 5 mm. In the case of sections, greater dry film thicknesses in single regio
42、ns are permitted. Table 1: Prefabrication primers Basic characteristicSymbol BinderPigmentation Epoxy (EP)Iron oxide (F)EPF Polyvinyl butyral (PVC)Iron oxide (F)PVBF Alkyd (AK)Iron oxide (F)AKF Acrylic (AY)Iron oxide (F)AYF Epoxy (EP)Zinc dust (Z)EPZ Ethyl-silicate (ESI)Zinc dust (Z)ESIZ Other nomin
43、al dry film thickness ranges and/or other types of prefabrication primer shall be applied if agreed at the time of enquiry and order. 9.2 Measurement of primer thickness The thickness of the dry film shall be measured according to ISO 2808, method 3 (dial gauge method). The test piece for measuring
44、the dry film thickness shall be perfectly smooth. Glass plates or thin steel sheets are the most commonly used type of test pieces. The test pieces shall be attached to the products at the end of the blast cleaning process and shall be primed at the same time as the product. Annex A (normative) spec
45、ifies the position(s) of test pieces for measuring the primer thickness for different products. Following the removal of the thickness test pieces, the unpainted area shall be primed with the same primer as used for the initial coating. The test pieces for the thickness control of the dry primer fil
46、m shall be stored by the manufacturer for at least one year. Page 5 EN 10238 : 1996 BSI 1997 10 Flame cutting and weldability If required at the time of enquiry and order, the flame cutting and weldability characteristics of prefabrication primers shall be measured according to one of the procedures
47、 specified in annex B. It is the responsibility of the purchaser to obtain, from the manufacturer, the results of these tests. 11 Handling and storage 11.1 Handling The following precautions shall be taken when handling primed products: avoid excessive rubbing of lifting appliances against the produ
48、cts; avoid friction of products against each other; avoid impact to the products; avoid dragging products over any surfaces. 11.2 Storage It is recommended that blast-cleaned and primed products be stored indoors as it allows optimum conservation. The following elementary precautions shall be taken
49、by the manufacturer when storing the products: isolate products from ground moisture by appropriate means (e.g. gravel and beams, etc.); store the products on a slightly inclined slope to avoid water stagnation; keep primed and untreated products separate; prevent personnel from walking on the treated products. NOTE. The purchaser should take the same precautions as the manufacturer. 12 Inspection and testing The products can be supplied with inspection and testing with respect t
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