sieves

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sieves

Sieves are a very ancient tool, at least as old as the open weave baskets usedto separate grain from refuse. A later more sophisticated sieve was the medievalmiller's bolting cloth. Even more precise sieves began to be made during theIndustrial Revolution. In 1800 , for e ample, to e tend the supply of grain during anagricultural crisis the king of England forbade the baking of bread with flour thatwould pass through a sieve with !" wires on each side of a s#uare inch. $%! &eorgeIII c ! , 1800 (

)any occupations are concerned with the si*e of large numbers of smallob+ects, such as grain, seeds or soil particles. If a graded series of sieves is

available, a batch can be shaken through a stack of sieves with increasingly smallerholes. eighing the amount left behind in each sieve gives a series of masseswhich is a si*e distribution for the particles in the batch. In such situations it ismore accurate to describe the si*es of the particles in sieve numbers, rather thanas particle diameters. -or an e ample of how sieve numbers are used to grade acommercial product, see abrasives.

he sieves used in industry and the laboratory are precision products. hesmaller the particle that is not to pass through the sieve, the finer the wires of thesieve/but despite that, the smaller the proportion of the sieve's area which is hole.

Test sieveaperturesISO

(See note 1.)

U.S. Alternate sieve designations,a survival of an older system. Mesh si es are roughly

the num!er of openings per in"h.

Tyler S"reen S"ale#$uivalent

%esignation

!01 mm 1 inches

!2 mm $%.0% inches(

!22 mm % inches

32 mm "4 inches

51 mm " inches

" mm 04 inches

1" mm 0.!0 inches

12 mm 0 inches

%1 mm !6 inches

"5.1 mm !4 inches

"!.1 mm !7 inches

0 .1 mm !.2 inches

01.22 mm ! inch 8

!3.22 mm "9% inch 2.5%0:

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7/21/2019 sieves


! .22 mm 19; inch 2. 0%:

!%.22 mm $2.1" inch(

!".02 mm

!0.12 mm 4 inch 8

!!.02 mm $59! inch(!2.22 mm

3.12 mm "9; inch 2."5!<

3.22 mm

;.22 mm 19! inch 04 mesh

5.!2 mm

.52 mm $2.0 1(

."2 mm 7 inch 8-ine Sieves

1. mm ="4 mesh "4 mesh

1.22 mm

%.51 mm =% %

%.12 mm

%.22 mm =1 1

".11 mm"."1 mm =

".!1 mm

0.;2 mm =5 5

0.12 mm

0." mm =; ;

0.0% mm

0.22 mm =!2 3!.;2 mm

!.52 mm =!0 !2

!. 2 mm

!.%2 mm =!% !0

!.01 mm

!.!; mm =! !%

!.!0 mm!.22 mm =!; !

322 >m

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7/21/2019 sieves


;12 ?m =02 02

;22 ?m

5!2 ?m =01 0%

"2 ?m

22 ?m ="2 0;

1 2 ?m

122 ?m ="1 "0

%12 ?m

%01 ?m =%2 "1

%22 ?m

"11 ?m =%1 %0

"!1 ?m

"22 ?m =12 %;

0;2 ?m

012 ?m = 2 2

00% ?m

0!0 ?m =52 1

022 ?m

!;2 ?m =;2 ;2

! 2 ?m

!12 ?m =!22 !22

!%2 ?m

!01 ?m =!02 !!1

!!0 ?m

!2 ?m =!%2 !12

!22 ?m32 ?m =!52 !52

;2 ?m

51 ?m =022 022

5! ?m

" ?m =0"2 012

1 ?m

1" ?m =052 05212 ?m

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7/21/2019 sieves


%1 ?m ="01 "01

%2 ?m

"; ?m =%22 %22

" ?m 8

"0 ?m =%12 80; ?m 8

01 ?m =122 122

00 ?m 8

02 ?m = "1 01

!1 ?m ;22

!2 ?m !012

1 ?m 0122&otes'

$!( he ratio between ad+acent si*es is the fourth root of 0, so the aperture si*edoubles every 1th si*e. Red lettering identifies si*es in common use in the @nitedStates that are AS ) supplementary values.

StandardsAS ) E !!.

ABSI C0".!.

AASD )30.

-ederal Spec. RR S " b.

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sieves

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