SIST EN ISO 801-3:1997

SLOVENSKI STANDARD
SIST EN ISO 801-3:1997
01-september-1997
9ODNQLQH'RORþDQMHSURGDMQHPDVHYEDODKGHO3RHQRWHQMHEDO
Pulps - Determination of saleable mass in lots - Part 3: Unitized bales (ISO 801-3:1994)
Zellstoffe - Bestimmung des Handelsgewichtes von Lieferposten - Teil 3: Großballen
(ISO 801-3:1994)
Pâtes - Détermination de la masse marchande des lots - Partie 3: Ballots (ISO 801-
3:1994)
Ta slovenski standard je istoveten z: EN ISO 801-3:1996
ICS:
85.040 Vlaknine Pulps
SIST EN ISO 801-3:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 801-3:1997

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SIST EN ISO 801-3:1997

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SIST EN ISO 801-3:1997

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SIST EN ISO 801-3:1997
INTERNATIONAL
Is0
STANDARD
801-3
First edition
1994-08-o 1
Corrected and reprinted
1996-06-I 5
Pulps - Determination of saleable mass in
lots -
Part 3:
Unitized bales
PS tes - D&termination de la masse marchande des lots -
Par-tie 3: Ballots
Reference number
IS0 801-3:1994(E)

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SIST EN ISO 801-3:1997
IS0 801=3:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 801-3 was prepared by Technical Committee
lSO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods
and quality specifications for pulp.
IS0 801 consists of the following parts, under the general title Pulps -
De termina Con of saleable mass in lots:
- Part 7: Pulp baled in sheet form
- Part 2: Pulps (such as flash-dried pulps) baled in slabs
- Part 3: Unitized bales
Annexes A and B of this part of IS0 801 are for information only.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopyrng and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST EN ISO 801-3:1997
INTERNATIONAL STANDARD 0 ISO IS0 801=3:1994(E)
Pulps - Determination of saleable mass in lots -
Part 3:
Unitized bales
- its gross mass (2.4) and its absolute dryness
1 Scope
(2.6),
This part of IS0 801 specifies a method for deter-
or
mining the dryness of a lot of pulp baled in sheet form
and shipped as unitized bales, and for calculating its
- its saleable mass (2.9).
saleable mass.
2.2 unit: A set of bales strapped together. Usually
This method is applicable to all kinds of pulp baled in
a unit (unitized bale) consists of eight individual bales,
sheet form and shipped as unitized bales. It does not
each having its own wrappings and wires, strapped
apply to pulp baled in lots in slab form or to pulp
together with steel bands to facilitate shipping and
shipped as single bales.
handling.
An example of a full certificate of analysis and related
2.3 bale: An individually strapped package of pulp
calculations is given in annex A. Annex B gives de-
sheets.
tails of equipment for marking the position of speci-
men sheets in sample bales.
2.4 gross mass: The total mass of a bale, a unit, a
part of a lot or a lot comprising
- contents;
2 Definitions
- wrappers (pulp - paper);
For the purposes of this part of IS0 801, the following
- packaging wires or strappings of individual bales.
definitions apply.
2.5 oven-dry mass: The mass obtained on drying
2.1 lot: The total number of unitized bales of the
pulp at 105 “C + 2 “C, until constant mass is reached.
-
same sort of pulp of specific characteristics.
2.6 absolute dryness: The ratio of the oven-dry
The number of unitized bales comprising a lot is indi-
mass (2.5) of the pulp to its initial mass, expressed
cated by the invoice or by agreement between the
as a percentage.
interested parties.
A lot of unitized bales of pulp is said to be “with 2.7 air-dry mass: The mass of the pulp when its
specification ” if it is accompanied by a certificate of moisture content is in equilibrium with the ambient
origin stating for each bale unit either
atmosphere.

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SIST EN ISO 801-3:1997
@z/J IS0
IS0 801-3:1994(E)
4.3 Equipment, for marking the position of the
2.8 theoretical commercial dryness: A conven-
specimen sheets to be selected (see annex B) and
tional equilibrium value of 88 % or 90 % according to
the country and/or commercial agreements? the test pieces in these sheets, as well as for cutting
them.
2.9 saleable mass: The gross mass (2.4) multiplied
by the absolute dryness (2.6) divided by the theoreti-
4.4 Equipment, for storing at least 40 test pieces
cal commercial dryness (2.8). Usually, it approximates
to prevent them from gaining or losing mass before
to the air-dry mass (2.7).
weighing.
2.10 invoiced mass: The saleable mass (2.9) indi-
cated by the vendor on the invoice.
4.5 Drying oven, with good ventilation, and capable
of being controlled at 105 “C + 2 “C.
-
3 Principle
From the lot, sample units are taken in number which
5 Sample units
is a function of the total number of units in the com-
plete lot. The bales in the sample units are weighed21
All the sample units shall be representative of the lot
and collected so that the bales of each unit form one
and for this purpose, so far as possible, these units
group.
should be selected at random from all parts of the lot.
In the absence of any other agreement between the
Five specimen sheets are selected from each sample
interested parties, the available part of the lot to be
bale under defined conditions.
examined shall be not less than half the complete lot
at the time of examination.
From each specimen sheet, a test piece is cut in the
form of a triangle, as indicated in clause 6.
If the units or bales in the units have identification
numbers relating to several series, the sample units
The test pieces are weighed and dried to constant
shall be selected as far as possible in proportion to the
mass to determi ne t heir oven-dry mass (2.5)
size of each of these series.
The saleable mass (2.9) of the lot is then calculated.
The samp le un its shal I be intact an d as little damaged
as possi bl e, an d shall not include
4 Apparatus
- bales showing signs of definite drying or wetting,
as may happen with bales situated on the external
faces of a stack;
4.1 Scale, suitable for weighing the bales to an ac-
curacy of at least 1 /I 000.
- bales or wrappings of bales having deteriorated,
or showing clear signs of accidental localized wet-
4.2 Balance, of sensitivity suitable for weighing the
ting or loss;
test pieces to an accuracy of at least l/5 000. The
- bales carrying traces of previous sampling;
balance shall have a capacity of at least 5 kg and a
sensitivity of 0,l g. Its weighing pan (or weighing ta-
- bales whose number is illegible or is not contained
ble) shall be wide enough to accommodate the test
in the specification, if this is a lot specified unit by
pieces so that they do not protrude outside the rim
unit.
of the pan.
The number of sample units, ~1, to be taken is, up to
NOTE 1 As the test pieces are weighed when still hot
they cause an upstream flow of air around the weighing pan a lot size of 650 units, determined by the formula
and, in consequence, a negative error in the balance read-
n= N
ing. This error is minimized if the pan is wide enough so that J-
no part of the test pieces protrudes outside the rim of the
pan. where N is the total number of units in the lot.
1) If the air dryness is 90 %, the pulp contains 90 parts by mass of absolutely dry fibres and 10 parts by mass of water. For
an air dryness of 88 %, the corresponding figures are 88 and 12.
2) The mean of the gross mass of the sample units is considered as being the mean of the gross mass of all the units in the
lot.
2

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SIST EN ISO 801-3:1997
IS0 801=3:1994(E)
0 IS0
possible, their marks and references in the order of
For lots exceeding 650 units, the number of sample
their weighing; from the results, calculate the gross
units is 25 plus one additional sample unit for each
mass of each sample unit. Check the scale (4.1) be-
additional 100 units in the lot.
fore the weighings and during the course of the op-
The number of sample units to be taken is given in
eration.
table 1.
If the moisture content of the sheets of pulp serving
For frozen pulp, the sampling shall be postponed until
as wrappers obviously differs from that of the rest of
the bales have thawed, so that satisfactory test
the bale, or if the wrappers are invoiced separately,
pieces can be cut from the sheets.
test them separately in accordance with 7.2.
If the number of sample units is determined as
NOTE 2
NOTE 3 The sample units can be weighed as such, if
stated above, the number of sample bales will be of the
there is a scale suitable for weighing the units to an accu-
same order as the maximum number of sample bales in
racy of at least 1 /I 000. In this case, the strappings (steel
IS0 801-I for a similar lot. Practice has shown that the
bands) holding the unit together are weighed separately and
minimum number of bales as stated in IS0 801-I very sel-
their mass is subtracted from the gross mass of the unit.
dom is enough for a satisfactory accuracy. One reason for
this is that nowadays the’gross masses of the bales are not
6.2 Selection of specimen sheets
always adjusted to 200 kg but can vary by almost 10 %.
Select five specimen sheets from each sample bale,
as specified below, as soon as possible after weigh-
Table 1 - Number of sample units to be taken
ing.
Total number of units in
Number of sample units
lot
Draw five sheets from each sample bale, the distance
between the sheets being constant and equal to
up to 12 3
one-fifth of the total thickness of the bale. Do not take
13to 20 4
21 to 30 5 the sheets from the same positions in each bale, but
31 to 40 6
select them according to the procedure specified be-
41 to 55 7
low and illustrated in figure 1. If the number of bales
56 to 70 8
in the units deviates from eight, give the bales a run-
7-l to 90 9
ning number starting from sample unit 1, sample
91 to 110 10
bale 1 and take the sample sheets according to the
111to130 11
diagram in figure 1. Thus, in the sample bale No. I, the
131 to 155 12
first sheet is taken 1 cm from the extreme top, and
156 to 180 13
the last sheet (the fifth) will be one-fifth of the thick-
181 to 210 14
211 to 240 15 ness of the bale from the bottom. In sample bales
241 to 270 16
Nos. II, Ill, IV, V and VI, VII and VIII, each sheet is
271 to 305 17
taken from a slightly lower position (actually l/70 of
306 to 340 18
the thickness of the bale) than the corresponding
341 to 380 19
sheet of the preceding bale; thus, in sample bale
381 to 420 20
No. VIII, the first sheet will be taken l/IO of the
421 to 460 21
height of the bale from the top, and the last sheet
461 to 505 22
will be I/IO of the height of the bale from the bottom.
506 to 550 23
The sample bale No. IX will recommence the cycle
551 to 600 24
601 to 650 25 and be treated in the same way as the sample bale
651 to 750 26
No. I, etc.
751 to 850 27
851 to 950 28 Select all specimen sheets very carefully, especially
etc.
those within about 5 cm from the top and the bottom
of the bale.
6 Procedure
The specimen sheets can be selected easily with the
aid of an appropriately graduated measuring rod (see
annex B). Place the rod in an inclined position against
6.1 Weighing of sample bales
the side of the bale, so that its lower end is at the
Determine the gross mass of each sample bale in level of its top. The faces on the rod correspond to the
each sample unit separately and report the results to cycle of eight bales and the lines correspond to the
an accuracy between l/500 and l/l 000; report, if five specimen sheets in the table.

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SIST EN ISO 801-3:1997
IS0 801=3:1994(E)
Bale Nos.
Bale Nos. Bale Nos. Bale Nos. Bale Nos. Bale Nos. Bale Nos. Bale Nos.
v, XIII, VI, XIV,
I, IX, 11, x, III, XI, IV, XII, VII, xv, VIII, XVI,
XXI, etc. XXII, etc. XXIII, etc. XXIV, etc.
XVII
...