BS EN 723-1996 Copper and copper alloys Combustion method for determination of carbon on the inner surface of copper tubes or fittings.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 723 : 1996 The Euro
2、pean Standard EN 723 : 1996 has the status of a British Standard ICS 77.120.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Copper and copper alloys Combustion method for determination of carbon on the inner surface of copper tubes or fittings This British Standard, having
3、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 December 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reference NFE/34/7 Draft for comment 92/39749 DC
4、ISBN 0 580 26715 6 BS EN 723 : 1996 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee NFE/34, Copper and copper alloys, to Subcommittee NFE/34/7, Copper and copp
5、er alloy tubes, upon which the following bodies were represented: British Non-ferrous Metals Federation British Plumbing Fittings Manufacturers Association British Refrigeration Association Copper Development Association National Association of Plumbing, Heating and Mechanical Services Contractors N
6、on-Ferrous Metal Stockists Power Generation Contractors Association (PGCA)(BEAMA Ltd.) BS EN 723 : 1996 BSI 1996i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 7233 ii BSI 1996 BS EN 723 : 1996 National foreword This British Standard has been prepare
7、d by Subcommittee NFE/34/7 and is the English language version of EN 723 : 1996 Copper and copper alloys Combustion method for determination of carbon on the inner surface of copper tubes or fittings, published by the European Committee for Standardization (CEN). Cross-reference Publication referred
8、 toCorresponding British Standard EN 1057 : 1996BS EN 1057 : 1996 Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating applications Compliance with a British Standard does not of itself confer immunity from legal obligations. CEN European Committee for Stan
9、dardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 723 : 1996 E EUROPEAN STANDARDEN 723 NORME EUROPE ENNE EUROPA ISCHE NORM August 1996 ICS 77.120.30 Descriptors:
10、 Copper tubes, rolled products, copper, chemical analysis, determination of content, carbon, chemical residues, combustion analysis, resistivity, infrared spectroscopy English version Copper and copper alloys Combustion method for determination of carbon on the inner surface of copper tubes or fitti
11、ngs Cuivre et alliages de cuivre Me thode de de termination par combustion de la teneur en carbone a la surface interne des tubes ou des raccords en cuivre Kupfer und Kupferlegierungen Verfahren zur Bestimmung des Kohlenstoffs auf der Innenoberfla che von Kupferrohren oder Fittings durch Verbrennen
12、This European Standard was approved by CEN on 1996-04-08. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical referenc
13、es 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 (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into
14、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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swit
15、zerland and United Kingdom. Page 2 EN 723 : 1996 BSI 1996 Foreword This European Standard has been prepared by CEN/TC 133, Copper and copper alloys, of which the Secretariat is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical
16、 text or by endorsement, at the latest by February 1997, and conflicting national standards shall be withdrawn at the latest by February 1997. Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 3, Copper tubes, to prepare the following standard: EN 723Copper and cop
17、per alloys Combustion method for determination of carbon on the inner surface of copper tubes or fittings According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Finland, Franc
18、e, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 3.1residual carbon3 3.2potential carbon3 3.3total carbon3 4General principle3 5Preparation o
19、f samples3 5.1General3 5.2Selection of samples3 5.3Cleaning of inner surface of sample3 5.4Cleaning of outer surface of sample4 5.5Cutting of test pieces4 6Combustion method for carbon-containing products5 7Methods for carbon content determination5 7.1General5 7.2Method using tetrabutylammonium hydr
20、oxide (HTBA)5 7.3Method of determination by measurement of differential electrical conductivity5 7.4Method of determination of infrared absorption spectrometry6 7.5Determination of blank value6 8Expression of results6 9Calibration6 10Test report6 Page 3 EN 723 : 1996 BSI 1996 1 Scope This European S
21、tandard specifies a combustion method for determining the carbon content, if any, on the inner surface of copper tubes or copper fittings. This standard applies only to round copper tubes as specified in EN 1057 or copper fittings as specified in prEN 1254-1 and prEN 1254-5. 2 Normative references T
22、his European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publ
23、ications 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. EN 1057Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating applications prEN 1
24、254-1 Copper and copper alloys Plumbing fittings Part 1. Fittings with ends for capillary soldering or capillary brazing to copper tubes prEN 1254-5 Copper and copper alloys Plumbing fittings Part 5. Fittings with short ends for capillary brazing to copper tubes 3 Definitions For the purposes of thi
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