indian standard vacuum flanges

8/14/2019 Indian Standard Vacuum Flanges

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IS 6076 : 1990IS0 1609 : 1986

Indian StandardVACUUM TECHNOLOGY-FLANGE DIME-NSIONS

First Revision)

UDC 621.643.412-l 66

0 BIS 1990BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002September 1990 Price Group 5

( Reaffirmed 2006 )


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IS 6076 : 1990IS0 1609 : 1986

Indian StandardVACUUM TECHNOLOGY-FLANGE DIMENSIONS

First Revision)NATIONAL FOREWORDThis Indian~Standard (First Revision) which is identical with IS0 1609 : 1986 Vacuum technology-Flange dimensions: issued by the International Organization for Standardkzation (ISO), ~has beenadopted by the Bureau of Indian Standards on 26 March 1990 on the recommendation of the ChemicalEngineering Plants and Related Equipment Sectional Committee (HMD 17) and approval of the HeavyMechanical Engineering Division Council.This standard was first issued in 1971 as Dimensions for vacuum flanges. Consequent upon thepublication of IS0 1609 : 1986, this standard (including its title) has been revised by adoptingIS0 1609 : 1986, to bring it in complete alignment with international practices.The text of IS0 standard hasbeen approved as suitable for publication as Indian Standard withoutdeviations. Certain conventions are,however, not identical tothose used in Indian Standards. Attentionis particularly drawn to the following :

a) Wherever the words International Standard appear referring tothis standard,theyshouldbe read as Indian Standard.b) Comma ,) has been used as a decimal marker inthelnternationalStandardwhile in Indian

Standards, the current practice is to use point (.)~as the decimal marker.CROSS REFERENCESIn this Indian Standard, the following international standards are referredto. Read intheir respectiveplaces the following :

International StandardIS0 3 Preferred numbers-Seriesof preferred numbers

IS0 273 Fasteners -Clearanteholes for bolts and screws

IS0 286 IS0 system of limits andfits

IS0 2861 /l Vacuum technology-Quick release couplings _ Di-~mensions - Part 1 :Clamped type

Indian StandardIS 1076 (Part 1) : 1985 Preferrednumbers : Part 1 Series, ofpreferred numbers second revi-sion)IS 1821 : 1987 Dimensions.for ,clearance holes for bolts andscrews third revision)IS 919 (Part 1) : 1963 Recommen-dations for limits and fits forengineering:Part 1 General engi-neering first revision)IS 8262 (Part 2) : 1976 Quickrelease couplings for vacuum pipelines : Part 2 Clamped type

Degree ofCorrespondenceIdentical

Identical

Technicallyequivalent

Technicallyequivalent


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IS 6076 : 1990IS0 1609 : 1986

The technical committee responsible for the preparation of this standard has reviewed the provisionsof the following IS0 standards and has decided that they are acceptable for use in conjunction withthis standard :

IS0 887 Plain washers for metric bolts, screws and nuts -General planIS0 1127 Stainless steel tubes - Dimensions, tolerances and conventional masses per unitlengthIS0 4200 Plain end steel tubes, welded and seamless-General tables of dimensions andmasses per unit length _


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IS 6076 : 1990IS0 1609 : 1986

1 Scope and field of applicationThis International Standard specifies the dimensions for flangesand collars usedin vacuum technology.

The dimensions ensure interchangeability between bolted,clamped and rotatable flanges,a) whether the assembly be homogeneous (for example,bolted flenges or clamped flanges) or heterogeneous (forexample, bolted flanges assembled with clamped flangeseither by means of bolts or clamps or by means of bolts androtatable flanges) ;b) whether the sealing rings used with the flanges beelastomer O-rings or metal sealing rings, provided that theyare compatible with the linear sealing loads given inannex 4.

2 ReferencesIS0 3, Referred num bers - Series of preferred num bers.IS0 273, Fasteners - Clearance holes for bolts end screws.IS0 286, IS0 system of imits and fi ts.1~IS0 887. Uain washers for metr ic bol ts> screws and nu ts -Ganeral plan.IS0 1127. Stainless steel tubes - Dimensio ns, tolerances andconvent ional masses per uni t ength.

IS0 286111, Vacuum technology - Quick-re lease coupl ings -Dimensio ns - Part 1: Clamped type.IS0 4200, plain end steel tubes, welded end seamless -,Genera l tab les of dimensions end masses per uni t ength.

3 Dimensions

3.1 General

3.1.1 The dimensions of the flanges or collars shall conformto those specified in tables 1,2 and 3 and shown in figures 12and 3. These dimensions are for finished products and do notinclude allowance for machining. Flanges or collars withnominal bores of 10 to 40 inclusive, given in tables 1, 2 and 3,accept the corresponding quick-release couplings specified in1803861/l. Relevant dimensions and tolerances are specifiedin annex 3.

3.1.2 The selection of materials shall be compatiblewith therequirements ~for flanges and collars used in vacuumtechnology and with the dimensions given in tables 1, 2 and 3.

3.1.3 In order to ensure the interchangeability of vacuumcomponents, the flanges shall be aligned so that the bolt holesare spaced equidistantly about and off the symmetrical plane ofthe component.

1) At present-at he stage of draft. (Revision of ISOlR 2W1 362.)


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IS 6076 : 1990IS0 1609 : 1~986

3.2 Nominal bore 3.5.2 Limits3.2.1 The tables provide a series of values of nominal boresintended to identify the flanges or collars.

The minimum mating face is defined by diameter E in table 1and S in table 2, and by diameter F in tables 1 and~2.

3.2.2 These values follow the progression of the RlO series ofpreferred numbers (see IS0 3) from which only the term 12.5has been eliminated.

3.5.3 ProfileThe flange sealing face shall be flat and no part of the flangeshall project in relation to this plane.

3.2.3 The values of nominal bore belonging to the R5 series ofpreferred numbers (see IS0 3) are as follows: 10, 16, 25, 40,63, 100, 160, 250, 400, 630 and 1000. They correspond tovalues intended to permit, in the long term, the adoption of areduced series of nominal bores.

3.6 Width of the collar onto which the clamphooks, GThe value for the width depends on the system of clamps usedand should not be greater than 2.5 mm.

3.2.4 The nominal bores 63 and 160 given in tables 1, 2 and 3correspond to practical diameters of 70 mm (or 65 mm) and153 mm respectively. 3.7 Outside diameter of bolted and rotatableflanges,3.3 Diameter of bolt holes, CThe values for the diameter of bolt holes, C, are derived fromthe bolt diameters, D, in accordance with IS0 273 - mediumseries.

The dimensions given for the outside diameter are compatiblewith the requirement that the bolt washers (IS0 667 - smallseries) shall not project beyond the outer circumference of theflange.

3.4 Bolt diameter, D 3.8 Number of bolt hates, n

For a flange of given nominal bore, the bolt diameter, D, is thesame for both bolted and rotatable flanges.

The linear sealing loads tabulated in annex A for a given boltstress are derived from the values of the number of boltholes, n.

3.5 Mating face3.5.1 Definition

,3.9 Inner diameter for the contact areaof clamps, U

The matinq face of the flange is the area in the form of a ring,the surface finish and-the flatness of which make the sealing ofthe joint possible.

So as to take into account the diversity of the Clampingsystems which may be used, for example on collars withwelding necks, the maximum inner diameter of the annulusresewed for contact with the clamps is defined by diameter I/.

4


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IS 6076 : l-990IS0 1609 : 1986

rFigure 1 - Bolted flange

Table 1 - Dimensions of bolted flanges.Dimensions in millimetres

Nominalbore*

?16 m26.32

40.6063+lio100.126

160.266

260:320

466:600

630loo0 Y

E

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1090

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l- Boltsr D E

0.6 6 4 300.6 6 4 350.6 6 4 400.6 6 4 451 8 4 551 0 4 651 8 4 751 6 4 951 8 8 1101 8 E 1301 10 0 1551 10 8 1801 10 12 2401 10 12 2902 12 12 3702 12 16 4502 12 16 5502 12 m 6902 12 24 -0602 12 32 1060

F

12.2 5517.2 6022.2 6526.2 7034.2 9041.2 10052.2 11070 13083 145

102 165127 203153 225213 285261 335318 425400 510501 610651 750800 920

loo0 1 m

Mjs16

a8088

12121212121616161620m20242424

See 3.2. It should be noted that the nominal bores recommended above 1000 are: 1 250, 1 600, 2~000 and2500.

* See 3.5.2.

5


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IS 6076 : 1990IS0 1609 : 1986

Dimensions in millimetres

G 2.5 max.Figure 2 - Collar for clamped or rotatable flanges

Table 2 - Dimensions of collars for clamped or rotatable flanges-PNominal F .P S c/ Wbore* js16 H14 60 hll hll---P 12.2 6 3 1 30 15 29l6 - 17,2 6 3 1 35 20 3325-20 22.2 6 3 1 40 25 36-32 25.2 6 3 1 45 30 43NJ- 34,2 6 3 1 55 40 53~-60 41.2 10 5 1.5 65 50 6263: 52,2 10 5 1.5 75 60 7270 10 5 1.5 95 60 92-w 63 10 5 1.5 110 95 107w- 102 10 5 1.5 130 115 127

160- 126 127 10 5 2.5 155 140 150=a

153 10 5 2.5 180 165 175213 10 5 2,5 240 225 235

=- 261 10 5 2.5 290 275 265400- 320 316 15 7.5 2.5 370 355 365

-500400 15 7.5 4 450 435 442

630- 501 15 7.5 4 550 635 542651 20 10 5 690 660 680---See 3.2. It should be noted that the nominal bores recommended above 630 ere: 600,l CM, 1250.1 600,

2KOand2500.See 3.5.2.

* see 3.9.

Dimensions in millimetres

6


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IS 6076 : 1990IS0 1609 : 1986

NOTE - The diameter of the retaining ring shall be compatible with dimension V.

Y D v K Q )** THll

11246-

10 0.5 6 4 2 3 30.10.6 6 4 2 3 35.10.6 6 4 2 3 40.10.5 6 4 2 3 45,l1 8 4 2 3 55.51 8 4 3 5,5 65.51 8 4 3 5.5 75.51 8 4 3 5.5 95,51 8 8 3 5.5 110.51 8 8 3 5.5 130.51 10 8 5 6.5 155.71 10 8 5 6.5 180.71 10 12 5 8.5 240.71 10 12 5 6.5 290.72 12 12 5 8.5 370.82 12 16 8 10 450.82 12 16 8 10 550.82 12 20 10 12 891

See 3.2. It should be noted that the nominal bores recommended above 630 are: 800, 1000, 1 250, 1 600. 2 COOand 2 500

40455055708090

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H136.6

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Nominalbore

Figure 3 - Rotatable flange with retaining ring

Table 3 - Dimensions of rotatable flanges with retaining rings

BBolts T Dimensions in millimetres

VH1432,l37.142.147.157,568.578,598.5

113.5133.5160.7185.7245.7295.7375,8458,8558.8701

BiO111111.51.51.51.51.52,52.52.52.52.5445

* In the absence of a standard for the drawn wire used for the rings, the following tolerances are suggested: to.02 mm for K=2 mmpp.025 mm for K=3 and 5 mmf 0.03 mm for K = 8 mm

** In no case should the surface of the rotatable flange protrude past the collar face when assembled.

7


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Annex ALinear sealing loads

(This annex forms an integral part of the standard.)

The values given in table 4 have been calculated for each bolted flange under the foilowing conditions of use:cr is the resulting linear load, in newtons per millimetre, exerted on a unit length of anelastomer O-ring by the uniform tighteningof n bolts to a stress of 200 N/mm? the mean diameter of the sealing ring, before compression, being equal to (d, +d2) mm.

Hence200 nr4= xfd, + d2)

whereF is the cross-sectional area of the core of the bolt, in square millimetres;dl is the inside diameter of the sealing ring, in millimetres;dz is the cross-sectional diameter of the sealing ring before compression, in millimetres.

Table 4 - Linear sealing loadsNominal boremm

Typical valuesof dN/mm

Figure 4 - Detail of a boltassembly with-o-ring

P 1851541321161771461249664

162 179146159144156I J

:8


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IS 6076 : 1990IS0 1609 : 1986

Annex B

Bores for vacuum flanges and required outside tube diameters(This annex forms an integral part of the standard.)

This annex gives both the boresfor the vacuum flanges defined in this International Standard and the outside diameters for tubes tobe used with these flanges.

Table 5 - Bores for vacuum flangesDimensions in millimetres

Nominal bore10$6 \26 26

324063: 66

Vlo: 60,,:,:mm:320

6on630

660loo0

4101621243441517063

10212716321-3261318400501651800

1ciJo* Dimension 4 is given for guidance only anddepends on the tube and the method of welding.

Table 6 - Flange recessDimensions in millimc_- Nominal bore 41

1.0 12.216-25----m40>32-6017,222.226.234,241.257 7

Tolerance for 4, : +i* mmThis recess permits the use of centrally locked seal-ing ring carriers.

I/ II

IFigure 5 - Bores for vacuum flanges

p= 2.5mm I II A I

tIFigure 6 - Bore for vacuum flanges with recess


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6076 : 199 O1609 : 1986

given in table 7 are taken from IS0 ll D or, far diameters greetet then 8& mm, from IS0 4xX).

table 7 - tubw for vaouum flange8Dimensions in millimetres

Flangenominal bore1.0

Tub. out&Id.dlematat*E26283644.56778.199891oB

133lb219,12S7**323.94@3,490899Q4912,B

1016

lubethIcknear*2222223.23,23,23.23,23.23,23-23,23.23.956.39

The values of the outside diameters and thickness of the tube areincluded for guidance only.Although this value is not mentioned in IS0 1127, it was adopted

instea of 273 with a view toallowing the seal positioning.


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Amendments Issued Since PoblicationAmend No. Date of Issue Text Affected

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indian standard vacuum flanges

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