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Standard Specification of Woven Wire Test Sieve Cloth and Test Sieves
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0% found this document useful (0 votes)
895 views12 pagesAstm E11 17
Standard Specification of Woven Wire Test Sieve Cloth and Test Sieves
Uploaded by
Akash PatrasCopyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
/ 12
This itrnationstsandard was developed in accordance with intrnainally recog peacipes ow standart eben the Des rt
Deveopment of Interatonal Standards Gates and Rccomencitons ised bythe Word Trade Organization Technical Barces to Trade TT) Commies
Designation: E11 - 17
Standard Specification for
Prac
Woven Wire Test Sieve Cloth and Test Sieves'
“This stand iss under he ied designation EI; the mur mediately folowing the designation nticts the yeu of ginal
slop or inte case of evo, the year xt ein. A pumber parentheses lets the Year fast Feapgroval A SURE.
‘ln (ends n etapa chan sine the ast rvinion o eappeol
This standard hasbeen approved for use By agencies ofthe US. Deparment of Defense
1. Seope*
1.1 This document specifies the technical requirements for:
the woven wire test sieve cloth (sieve cloth) used in test sieves,
the construction of test sieves, standard and non-standard test
sieve frame sizes, and test procedures used t0 inspect sieve
cloth and the tes sieves This speification applies to test sieves
manufactured with sieve cloth having a nominal apcrtre size
ranging from 125 millimetres (mm) dawn to 20 micrometres
(um)
1.2. Additional reference information can be found in Spe’
fications E161, E323, E2016, and in Test Methods €430 and
E27,
1.3 The values stated in SI units shall be considered
standard forthe dimensions of the sieve cloth openings andthe
wire dismeters used in the sieve cloth, The values stated in
inch-pound wits shall be considered standard with regard 10
the sieve frames, pans, and covers.
14 This standard does not purport to address all of the
safety concerns, if any, assoctated with its use. It 1s the
responsibilty of the user ofthis standard to establish appro
priare safery and health practices and determine the applica
bility of regulatory limitations prior to ase.
15 This international stendard was developed in accor
dance with internationally recognized principles on stondard
ication established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Commitee
2, Referenced Documents
2.1 ASTM Standards:*
"his pxiieation is unre jurissiction of ASTM Commits 29 oa Pathe
and Spey Characterization and isthe dict sparsity of Subeomonites EB
‘on Sieve, Sieving Meth. and Serer Mea.
Crem eiion approved. Apel. 2017, Published Apil 2017, Origin
approved in 1925, Last previous con approved in 2016 a5 Bil ~ 16, DOL
TOU S2UMBOOKI-17
"or sofrenced ASTM sandans, visit tbe ASTM website, wu asin 0
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3.1.4 firmness—a subjective term referting to the planar
ity of sieve cloth (as a roll good, not mounted in a test
sieve frame), established by the tensile strength of the material,
the relationship of the mesh to wire diameters, the type of
‘weave, and amount of crimp in the wires. The absence of
firmness in sieve cloth is termed sleaziness.
3.1.5 marched test sieve—a test sieve that reproduces the
performance results of another test sieve within user defined
limits for a designated material (for information only and may
‘not be in compliance with this specification),
3.1.6 mesh—the number of wires or openings per linear inch
(25.4 mm) counted from the center of any wire t a point
exactly | in, (25.4 mm) distant, including the fractional
distance between either thereof.
3.1.7 pllain weave—sieve cloth in which the warp wires and
shute wires pass over one and under one in both directions.
3.1.8 shute wires—the wires running the short way of, or
‘across the cloth as woven (also referred to as the shoot, fill, or
weft wires)
3.1.9 sieve—an apparatus for the purpose of sieving, con-
sisting of a separating media mounted in a frame.
3.1.10 sieve cloth—woven wire cloth conforming to this
specification
3.1L test sieve (wire clotk}—a sieve manufactured by
‘mounting sieve cloth in a frame, designed for use in particle
size analysis by sieving
3.1111 compliance rest sieve—a test sieve manufactured
using sieve cloth which has been inspected prior to being
‘mounted in the sieve frame; and that meets the requirements of
‘Table | in part based on the standard deviation of the required
‘number of sample openings per 100 square feet of sieve cloth
(Column 7) not exceeding the maximum allowable for a
confidence level of 66 % (Column 8).
3.1.11.2 inspection test sieve—a test sieve manufactured
using sieve cloth which has been inspected after being mounted
in the sieve frame; and that meets the requirements of Table |
in part based on the standard deviation of the required cumber
‘of sample openings in the test sieve (Column 9) not exceeding,
the maximum allowable for a confidence level of 99%
(Column 10)
3.1.11.3 calibration test sieve—a wst sieve manufactured
using sieve cloth which has been inspected after being mounted
in the sieve frame; and that meets the requirements of Tabe |
in part based on the standard deviation of the required number
‘of sample openings in the test sieve (Column 11) not exceeding.
the maximum allowable for a confidence level of 99.73 %
(Column 12).
3.1.11.3.1 Discussion—Calibration sieves have had at least
as many openings measured as Inspection sieves.
3.1.12 twill weave—sieve cloth in which the warp wires and
shute wires pass over two and under two wires in both
directions,
3.1.13 awarp wires—the wires running the long way of the
cloth as woven,
4. Ordering Information
4.1. Orders for items under this specification should include
the following information as required
ALLL Description of item(s) (Test Sieve or Sieve Cloth),
4.1.2 ASTM B11 designation and year of issue,
4.1.3 Quantity of each item, and
ALLA Sieve designation (Table 1, Standard Column 1, Ab.
temate Column 2)
4.1.4.1 Test sieves can be supplied based on different levels,
‘of confidence as Compliance Sieves, Inspection Sieves, and
Calibration Sieves
4.2 Test sieves in standard circular or nonstandard frame:
4.2.1 Nominal sieve frame diameter (see Table 2), and
4.2.2 Nominal sieve frame height (sce Table 2)
43 Description of nonstandard sieve.
5, Sieve Cloth Requirements
S.1 The sieve cloth used in test sieves shall meet the
requirements of Table | and shall be designated Specification
EL! Sieve Cloth, The number of inspected apertures shall be in
accordance with Table | (Column 7). Sieve cloth conforming
to this specification shall be woven from stainless steel, brass,
or bronze. Sieve cloth with openings greater than or equal to 75
‘mieromettes shall be woven using a plain weave. For sieve
cloth with openings equal to or less than 71 micrometres the
sieve cloth may be supplied using a twill weave, The sieve
cloth shall not be coated or plated.
5.2 All measurements of openings and wire diameters shall
be made along the midpoints of the openings as shown in Fis.
Ul
5.3 There shall be no punctures or obvious defects in the
sieve cloth.
TABLE 2 Dimensions of Standard Frame:
Tena DareterTowence in fom) Typ Faa™
Sart era Hor
in Inside at Too? —_
3 3K + 0080-0000 Tes)
(7e2 6070-000) 380)
. 000+ 0,090-0000 eats)
(Gsee eo76-000) "1a54) HH
° ‘5000 +0.090-0000 208) 94
(eas2 076-000) sa) Hi
10 1n920-+ 9600-0900 37024
‘ext 078-00 e063
2 12000 + 0080-0000 eos eH
(eons -076-000) 20a
veeranre
“Frama algh reagured om lp af Fame top of seve cath
easuted 0.2 in (5m) blow te op of he ame.
EA= fl eight: HH = hal eight IH = ntrmedate height a
pete fly E11 - 17
Key
Mheommese HY HY
dis the wire dameter z ee
isthe pitch (+a) >
FIG. 1 Aperture Size
6. ‘Technical Requirements
6.1 Opening Sizes, Tolerances, and Standard Deviation:
6.1.1 Four tolerances shall be applied: the variation for
average opening (¥), the maximum variation (3), the maximum,
standard deviation and the average wire diameter. The opening,
tolerances apply to the opening sizes, measured on the mid-
point of the opening (sce Fig. |), and applied separately in both
the warp and shute directions.
6.1.2 The average opening size shall not exceed the sieve
designation by more than +¥ (Table L, Column 4):
wo
where ¥ and w are expressed in micrometres.
6.1.3 The maximum opening size measured shall not exceed
the nominal opening size w (Table 1, Column 1), by more than
X (Table 1, Column 5):
@
where X and w are expressed in micrometres.
6.14 The intermediate value Z shall be stated as follows:
xtY
z
8)
6.1.5 The maximum standard deviation is calculated based
‘on the Gaussian normal distribution curve, truncated atthe lft
fend at 0 and atthe right end at w + X. The area under the curve
to the maximum value w +X minus the area under the curve to
the intermediate value Z, is equal (o this critical area between
(v+Z) and (+X) not exceeding more than 5 % of the
‘openings (see Appendix X2). The tolerances for sigma are then
caleulated based on:
-a()-9(5)
oF) -o( =)
and the results are given in Table { for
cloth (Column 8),
105 (see Appendix X4}
6.1.5.1 In order to increase the probability or acceptance
confidence evel from 66 % at one-sigms to Xo, specifically
99 4 (2.580) and 99.73 % (30) for Inspection and Calibration
sieves respectively, these maximum standard deviation values
are determined by dividing sigma by a correction or K-factor,
‘These K-factors are determined based on approximation to
Chi-square distribution for the sample variance as follows:
K= 1X2" 0) “
6.1.5.2 The applicable resulting K-factors (see Appendix
X3) are then applied and the maximum standard deviation
tolerances are determined as follows:
snk 3
6.1.5.3 The resulting tolerances are given in Table 1 for
Inspection Sieves (Column 10) and for Calibration Sieves
(Column 12), and are presented for convenience based on the
K-factors per the required minimum number of openings.
6.1.6 The actual standard deviation of the openings in the
warp and weft directions, when taken separately, shall not
exceed the values shown in Table | for each type. Ifthe number
‘of sample openings is less than 15, the maximum standard
deviation is not evaluated. IF more than the minimum number
of openings are measured, the maximum standard deviation
shall be calculated (see Eq 5) based on the corresponding
K-factor calculation (see Eq 4).
6.1.6.1 The population standard deviation o is obtained by
‘measuring all of the full openings WV found in the test sieve and
is calculated from the following equation;
wk os
6.1.6.2 The sample standard deviation s is calculated from
the measurement of the number of apertures, m as listed in
Table | (Column 8 for Sieve Cloth, Column 10 for Inspection
Sieves, and Column 12 for Calibration Sieve), using the
following equation:
fa
Va
6.2 Wire Diameters:
6.2.1 The wire diameters given in Table 1, Column 13 are
ypical.
6.2.2 The average wire diameter in a testsieve or sieve cloth
shall fall between the tolerance (d min and d max ) given in
Table 1, Column 14 and 15, respectively. It is recognized that
mechanical deformation of the wire occurs during weaving,
and therefore the diameter measured after weaving may be
different than the wire diameter before weaving, The average
‘wire diameter shall be calculated based on the same number of
sample apertures measured in accordance with Table 1.
6.2.3 The wires shall be crimped in such a manner that the
cloth exhibits firmness, as agreed between the user and the
supplier, as applied to roll goods.
a
63 Test Sieve Frames
6.3.1 General Requirements—Frames for test sieves shall be.
constructed in such a manner to be rigid. The sieve cloth shall
be mounted on a frame without distortion, looseness, or ‘waviness, The method used to attach the sieve cloth to the
frame shall be done so the material being sieved will not
become caught in the joint between the sieve cloth and the
frame,
6.3.2 Standard Frames—Sieve frames shall be circular.
‘Typical frame sizes are 3 in,, 6 in., 8 in., 10 in,, and 12 in.
diameter (or 76, 152, 203, 254, or 305 mm), Tolerances for
dimensions of test sieve Irames are given in Table 2. Frames
shall be made of a noncotrosive material such as brass or
stainless steel, The bottom of the frame shall be constructed so
as to provide an easy sliding or nesting fit with any sieve frame
Of the same nominal diameter conforming to the specified
dimensions,
6.3.3 The joint or fillet atthe point where the sieve cloth and
frame meet will provide a minimum clear sieving surface with
diameter equal to the nominal diameter, less 0.5 in. (13 mm)
‘on up to and including 8 in. frames, and 1.0 in. (25 mm) on
greater than 8 in. frames.
64 Nonstandand Sieves:
64.1 Nonstandard Frames—Other sieve frames may be
square, rectangular, circular, or non-metal. ‘The frame may
hhave the sieve cloth permanently attached, or it may be
designed so the sieve cloth is replaceable, The provisions of
6.3.1 apply. Nonstandard test sieves may be certified in
accordance with Section 7.
6.4.2 Sieves with Backing Cloth—Backing cloth specifica-
tions can vary in accordance with the test sieve manufacturer
‘The use of a backing cloth will affect the sieve performance.
‘Test sieves with a backing cloth can only be supplied as
Compliance Sieves.
7. Test Sieve and Sieve Cloth Documentation and
Certification
7.1 Documentation of the measurement of the openings in
the sieve cloth must assure that the test sieve is traceable and
certifiable. All test sieve certificates must be traceable by the
{est sieve serial number. Inspection and Calibration sieves must
fly ett - 17
also include the date, name and signature of the person
certifying to the test sieve quality,
7.2 Test sieves may be supplied as Compliance, Inspection,
ot Calibration Sieves,
7.2.1 A Compliance sieve certificate shall state that the test
sieve has been manufactured with sieve cloth that has been
inspected and found to be in compliance with the requirements
of Specification Ell, The Certificate does not require any
statistical documentation,
7.2.2 An Inspection sieve certificate shall state at a mini-
‘mum the value for the average aperture size, separately in both
the warp and shute direction of the sieve cloth. A Certificate
with this inspection data must be supplied.
7.2.3 A Calibration sieve certificate shall state at a minimum
the number of apertures and wire diameters measured, the
average aperture size, standard deviation and average wire
diameter, separately in both the warp and shute directions of
the sieve cloth. A Certificate with this inspection data must be
supplied.
8. Marking or Labeling of Test Sieves
8.1 Each test sieve supplied shall bear a label marked with
8.1.2 The “ASTM EIL” designation,
8.1.3 Name of the manufacturer or distributor,
8.1.4 Test sieve designation from Table |, Column t, and
8.1.5 Alternate test sieve designation from Table |, Column
2 (optional)
8.1.6 Each test sieve shall have a unique serial number
permanently marked onto the sieve frame, skirt, or nameplate.
8.17 The test sieve may also be labeled with the Grade
designation.
9. Keywords
9.1 aperture; calibration sieve; compliance sieve; inspection
sieve: opening; particle size; sieve: sieve analysis; sieve cloth;
sieve designation; test sieve: woven wire test sieve clolh
SUPPLEMENTARY REQUIREMENTS
‘The following supplementary requirements shall apply only when specified by the purchaser in the
contract or order.
SI. Responsibility for Inspection
Sl.1 Unless otherwise specified in the contract or purchase
‘order, the producer is responsible for the performance of all
inspection and test requirements specitied herein, Except as
otherwise specified in the contract or order, the producer may
use his own or any other suitable facilities for the performance
fof the inspections and tests requirements specified herein,
unless disapproved by the purchaser. The-purchaser shall have
the right to perform any of the inspections and tests set forth in
this specification where such inspections are deemed necessary
to ensure that materials meet the specification.
S2. Government Procurement
2.1 Unless otherwise specified in the contract, the material
shall be in packaged in accordance with the suppliers” standard
Practice that will be acceptable to the carrier at lowest rates.
Containers and packing shall comply with the Uniform Freight
Classification rules or National Motor Classification rales.
Marking for shipment of such materials shall be in accordance
with Fe. St No, 128 for evil agencies, and MIL-STD- [29
for military agencies, (Mandatory Information)
Al, PROCEDURE FOR INSPECTING SIEVE CLOTH AND TEST SIEVES
AL Every opening in the sieve cloth or test sieve shall
have the same probability of being inspected for compliance
with the requirements shown in Tuble I, For sieve cloth and
test sieves having 15 openings or less, measure all full
‘openings (see Fi 1) For sieve cloth and test sieves having
more than 15 openings, carry out the inspection using the
following three procedures:
ALI Visually inspect the condition of the sieve cloth
against a uniformly illuminated background. If obvious devi
tions from uniformity of appearance are found (weaving
fects, ereases, wrinkles, etc.) the sieve cloth or test sieve, oF
both, is unacceptable,
AL.L.2 Inspect for oversize openings per tolerance X given
in Table | (Column 5); carefully and methodically examine the
appearance of all openings in order to detect oversize openings,
for subsequent measurements. Openings in fine mesh sieves
are best viewed when magnified optically. In the optical
‘method, the minimum number of apertures examined shall be
in accordance with Table 1 (Columns 9 or 11) for sieves and
(Column 7) for sieve cloth, The magnifications listed in Table
Al. may be used. If any opening is found to be oversize by
‘more than tolerance X, the sieve cloth or test sieve is unac-
ceptable.
AL.1.3 Determine the average opening size (w in
millimetres), and for apertures less than one millimetre, in
micrometres, the standard deviation and wise diameter. The
‘measured openings shall be spaced over the full diameter of the
test sieve. Figs. Al. 1 and .\1.2 indicate options to measure the
individual openings in an 8 in. (203 mm) diameter test sieve
‘The minimum number of openings to be measured, in both the
warp and shute direction, in an 8 in. diameter test sieve for
Inspection and Calibration grades are shown in Table |,
Columns 9 of 11 respectively, For test sieve sizes other than the
8 in. diameter, the values shown in this table should be
modified in proportion to the sieving area, For sieves greater
than 8-in. diameter with designations 25 mm and larger, a
maximum of, 25 apertures shall be measured for Inspection
sieves and 50 apertures for Calibration sieves. Determine the
average opening along the center line of the sieve cloth
separately in two directions, parallel 10 the warp and shute
wires respectively (see Figs. A}.2 and 1.2), Ifthe sieve eloth
is a twill weave (openings less than or equal to 71 micrometre),
the configuration shall be as shown in Fig, Alt and the
‘measurements shall be made vertically, to the wire
Al.L4 To determine the average opening in sieve cloth
refer f0 Table | for the minimum number of sample openings
10 be measured. Calculate the standard deviation as in accor-
dance with 6.1.6.2. If the wire diameter is measured separately,
‘not at the same time the opening is measured, the number of
samples shall be the same as the sample openings,
~~
FIG. A1.1 All Full Apertures Measure up to 18 Apertures:
a
Po Bex: 200 / §
= [Nore I Apertures shall be randomly selected, spaced over the full,
sieve diameter at imegular intervals, messurement for warp and shute