BS EN ISO 801-3-1995 Pulps Determination of saleable mass in lots Unitized bales《纸浆 成批销售质量的测定 按统一规格打包》.pdf

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1、BRITISH STANDARD BS EN ISO 801-3:1997 Incorporating Amendment No. 1 to BS 4747-3:1995 (renumbers BS as BS EN ISO 801-3:1997) Pulps Determination of saleable mass in lots Part 3: Unitized bales The European Standard EN ISO 801-3:1996 has the status of a British Standard ICS 85.040BSENISO801-3:1997 Th

2、is British Standard, having been prepared under the directionof the Materials and Chemicals Sector Board (I/-), waspublished under the authorityof the StandardsBoardand comes intoeffect on 15 January 1995 BSI 10-1999 The following BSI references relate to the work on this standard: Committee referen

3、ce PAI/11 Draft for comment 91/45547 DC ISBN 0 580 23647 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PAI/11, upon which the following bodies were represented: British Carton Association British Fibreboard Packaging

4、Association British Printing Industries Federation British Textile Confederation Envelope Makers and Manufacturing Stationers Association Her Majestys Stationery Office Institute of Paper Conservation Paper Federation of Great Britain Pira International Post Office University of Manchester (Institut

5、e of Science and Technology) Coopted members Amendments issued since publication Amd. No. Date Comments 9411 March 1997 Indicated by a sideline in the marginBSENISO801-3:1997 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Definitions

6、 3 3 Principle 3 4 Apparatus 4 5 Sample units 4 6 Procedure 5 7 Expression of results 7 8 Test report 8 Annex A (informative) Example of a full certificate of analysis and related calculations 9 Annex B (informative) Equipment for marking the position of the specimen sheets in sample bales 11 Figure

7、 1 Diagram indicating the position from which specimen sheets shall be taken 5 Figure 2 Diagram illustrating the numbering of the bales in the sample units 6 Figure 3 Diagram illustrating how test pieces with constant angle at the apex are to be cut from specimen sheets selected according to the dia

8、gram given in Figure 1 6 Table 1 Number of sample units to be taken 4 Table B.1 Distance of specimen sheet from uppermost graduation line 12BSENISO801-3:1997 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee PAI/11 and is the English language version of

9、ENISO801-3:1996 Pulps Determination of saleable mass in lots Part3: Unitized bales, published by the European Committee for Standardization (CEN). It is identical with ISO801-3:1994, published by the International Committee for Standardization (ISO). It supersedes BS4747-3:1995which is withdrawn. EN

10、 ISO801-3:1996was produced as a result of international discussions in which the United Kingdom took an active part. EN ISO801-3:1996has been approved by CEN member bodies under the weighted voting procedures introduced in1988to coincide with the introduction of “New Approach” Directives from the Co

11、mmission of the European Community. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summa

12、ry of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 12 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside f

13、ront cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 801-3 September 1996 ICS 85.040 Descriptors: Paper pulps, bales, tests, determination, dry matter, commercial mass, mass measurement English version Pulps Determination of saleable mass in lots Part 3: Unitized bales (ISO 801-3:1994

14、) Ptes Dtermination de la masse marchande des lots Partie 3: Ballots (ISO 801-3:1994) Zellstoffe Bestimmung des Handelsgewichtes von Lieferposten Teil 3: Groballen (ISO 801-3:1994) This European Standard was approved by CEN on1996-08-25. CEN members are bound to comply with the CEN/CENELEC Internal

15、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 references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. Th

16、is 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 t

17、he national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komite

18、e fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN ISO 801-3:1996 EENISO801-3:1996 BSI 10-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC6, Paper, board and pulps of the International Organiz

19、ation for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC172, Pulp, paper and board, 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 or by endor

20、sement, at the latest by March1997, and conflicting national standards shall be withdrawn at the latest by March1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, De

21、nmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.ENISO801-3:1996 BSI 10-1999 3 1 Scope This part of ISO801specifies a method for determining the dryness of a lot of pulp baled in sheet form

22、and shipped as unitized bales, and for calculating its saleable mass. This method is applicable to all kinds of pulp baled in sheet form and shipped as unitized bales. It does not apply to pulp baled in lots in slab form or to pulp shipped as single bales. An example of a full certificate of analysi

23、s and related calculations is given in Annex A. Annex B gives details of equipment for marking the position of specimen sheets in sample bales. 2 Definitions For the purposes of this part of ISO801, the following definitions apply. 2.1 lot the total number of unitized bales of the same sort of pulp

24、of specific characteristics the number of unitized bales comprising a lot is indicated by the invoice or by agreement between the interested parties a lot of unitized bales of pulp is said to be “with specification” if it is accompanied by a certificate of origin stating for each bale unit either it

25、s gross mass (2.4) and its absolute dryness(2.6), or its saleable mass (2.9). 2.2 unit a set of bales strapped together. Usually a unit (unitized bale) consists of eight individual bales, each having its own wrappings and wires, strapped together with steel bands to facilitate shipping and handling

26、2.3 bale an individually strapped package of pulp sheets 2.4 gross mass the total mass of a bale, a unit, a part of a lot or a lot comprising contents; wrappers (pulp paper); packaging wires or strappings of individual bales. 2.5 oven-dry mass the mass obtained on drying pulp at105 C 2 C, until cons

27、tant mass is reached 2.6 absolute dryness the ratio of the oven-dry mass (2.5) of the pulp to its initial mass, expressed as a percentage 2.7 air-dry mass the mass of the pulp when its moisture content is in equilibrium with the ambient atmosphere 2.8 theoretical commercial dryness a conventional eq

28、uilibrium value of88% or90% according to the country and/or commercial agreements 1) 2.9 saleable mass the gross mass (2.4) multiplied by the absolute dryness (2.6) divided by the theoretical commercial dryness (2.8). Usually, it approximates to the air-dry mass (2.7) 2.10 invoiced mass the saleable

29、 mass (2.9) indicated by the vendor on the invoice 3 Principle From the lot, sample units are taken in number which is a function of the total number of units in the complete lot. The bales in the sample units are weighed 2)and collected so that the bales of each unit from one group. Five specimen s

30、heet are selected from each sample bale under defined conditions. From each specimens sheet, a test piece is cut in the from of a triangle, as indicated in clause6. The test pieces are weighed and dried to constant mass to determine their oven-dry mass (2.5). The saleable mass (2.9) of the lot is th

31、en calculated. 1) If the air dryness is90%, the pulp contains90parts by mass of absolutely dry fibres and10parts by mass of water. For an air dryness of88%, the corresponding figures are88and12. 2) The mean of the gross mass of the sample units is considered as being the mean of the gross mass of al

32、l the units in the lot.ENISO801-3:1996 4 BSI 10-1999 4 Apparatus 4.1 Scale, suitable for weighing the bales to an accuracy of at least 1/1000. 4.2 Balance, of sensitivity suitable for weighing the test pieces to an accuracy of at least 1/5000. The balance shall have a capacity ofat least 5 kg and a

33、sensitivity of 0,1g. Its weighing pan (or weighing table) shall be wide enough to accommodate the test pieces so that they do not protrude outside the rim of the pan. NOTE 1As the test pieces are weighed when still hot they cause an upstream flow of air around the weighing pan and, in consequence, a

34、 negative error in the balance reading. This error is minimized if the pan is wide enough so that no part of the test pieces protrudes outside the rim of the pan. 4.3 Equipment, for marking the position of the specimen sheets to be selected (seeAnnex B) and the test pieces in these sheets, as well a

35、s for cutting them. 4.4 Equipment, for storing at least40test pieces to prevent them from gaining or losing mass before weighing. 4.5 Drying oven, with good ventilation, and capable of being controlled at105 C 2 C. 5 Sample units All the sample units shall be representative of the lot and for this p

36、urpose, so far as possible, these units should be selected at random from all parts of the lot. In the absence of any other agreement between the interested parties, the available part of the lot to be examined shall be not less than half the complete lot at the time of examination. If the units or

37、bales in the units have identification numbers relating to several series, the sample units shall be selected as far as possible in proportion to the size of each of these series. The sample units shall be intact and as little damaged as possible, and shall not include bales showing signs of definit

38、e drying or wetting, as may happen with bales situated on the external faces of a stack; bales or wrappings of bales having deteriorated, or showing clear signs of accidental localized wetting or loss; bales carrying traces of previous sampling; bales whose number is illegible or is not contained in

39、 the specification, if this is a lot specified unit by unit. The number of sample units, n, to be taken is, up to a lot size of650units, determined by the formula where N is the total number of units in the lot. For lots exceeding650units, the number of sample units is25plus one additional sample un

40、it for each additional100units in the lot. The number of sample units to be taken is given inTable 1. For frozen pulp, the sampling shall be postponed until the bales have thawed, so that satisfactory test pieces can be cut from the sheets. NOTE 2If the number of sample units is determined as stated

41、 above, the number of sample bales will be of the same order as the maximum number of sample bales in ISO801-1for a similar lot. Practice has shown that the minimum number of bales as stated in ISO801-1very seldom is enough for a satisfactory accuracy. One reason for this is that nowadays the gross

42、masses of the bales are not always adjusted to200kg but can vary by almost10%. Table 1 Number of sample units to be taken nN = Total number of units in lot Number of sample units Up to 12 3 13 to 20 4 21 to 30 5 31 to 40 6 41 to 55 7 56 to 70 8 71 to 90 9 91 to 110 10 111 to 130 11 131 to 155 12 156

43、 to 180 13 181 to 210 14 211 to 240 15 241 to 270 16 271 to 305 17 306 to 340 18 341 to 380 19 381 to 420 20 421 to 460 21 461 to 505 22 506 to 550 23 551 to 600 24 601 to 650 25 651 to 750 26 751 to 850 27 851 to 950 28 etc.ENISO801-3:1996 BSI 10-1999 5 6 Procedure 6.1 Weighing of sample bales Dete

44、rmine the gross mass of each sample bale in each sample unit separately and report the results to an accuracy between1/500and1/1000; report, if possible, their marks and references in the order of their weighing; from the results, calculate the gross mass of each sample unit. Check the scale (4.1) b

45、efore the weighings and during the course of the operation. If the moisture content of the sheets of pulp serving as wrappers obviously differs from that of the rest of the bale, or if the wrappers are invoiced separately, test them separately in accordance with7.2. NOTE 3The sample units can be wei

46、ghed as such, if there is a scale suitable for weighing the units to an accuracy of at least1/1000. In this case, the strappings (steel bands) holding the unit together are weighed separately and their mass is subtracted from the gross mass of the unit. 6.2 Selection of specimen sheets Select five s

47、pecimen sheets from each sample bale, as specified below, as soon as possible after weighing. Draw five sheets from each sample bale, the distance between the sheets being constant and equal to one-fifth of the total thickness of the bale (see the note). Do not take the sheets from the same position

48、s in each bale, but select them according to the procedure specified below and illustrated in Figure 1. if the number of bales in the units deviates from eight, give the bales a running number starting from sample unit1, sample bale1 and take the sample sheets according to the diagram inFigure 1. Th

49、us, in the sample bale No.1, the first sheet is taken1cm from the extreme top, and the last sheet (the fifth) will be one-fifth of the thickness of the bale from the bottom. In sample bales Nos. II, III, IV, V and VI, VII and VIII, each sheet is taken from a slightly lower position (actually1/70of the thickness of the bale) than the corresponding sheet of the preceding bale; thus, in sample bale No. VIII, the first sheet will be taken1/10of the height of the bale from the top, and the last sheet will be1