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Indian Standard

SCREWED CLOSURES FOR DRUMSSPECIFICATION( Th i rd Rev i s i on )

Not to be reproduced w ithout permission Last date of receiptOf BIS or used as a STANDARD comments is 15 June 2011

1 SCOPE

1.1 This standard prescribes the requirements and methods of tests for steel and zinc alloyclosures used on drums of nominal capacity of 200 litres with fixed ends [see IS 1783 ( Part 1 ) :1993 Drums, large, fixed ends: Part 1 Grade A drums ( third revision ) and IS 1783 ( Part 2 ) :1988 Drum, large, fixed ends: Part 2 Grade B Drums ( third revision) ] .

1.2 Two nominal sizes of closures, 50 mm and 20 mm have been covered in this standard.

2 REFERENCES

2.1 The following Indian Standards contain provisions, which through reference in this text,constitute provisions of this standard. At the time of the publication, the editions indicated belowwere valid. All the standards are subject to revision, and parties to agreement based on thisstandard are encouraged to investigate the possibility applying the most recent edition of thestandard.

IS No. Title

513:1994 Cold rolled low carbon steel sheets and strips (fourth revision)742:1981 Zinc base alloy die castings (second revision)

1079:1994 Hot rolled carbon steel sheet and strip (fifth revision)1394:1984 Glossary of terms relating to metal containers ( third revision)2643 (Part 1): Dimension for pipe threads for1975 Fastening purposes: part 1 Basic profile and dimensions(first

revision)IS 12591:2006 Cold reduced electrolytic chromium/chromium oxide coated steel

/ISO 11950:1995

3 TERMINOLOGY

For the purpose of this standard, the definitions given in IS 1394 shall apply.

4 MATERIALS

The various components of the screwed closure assembly are shown in Fig. 1. Materials usedfor the manufacture of different components of steel closures shall be as given in 4.1, 4.2,4.3 and 4.4. Supply of capsealand tag ring with closures is optional and as agreed betweenthe supplier and purchaser.

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4.1 Flange and Flange Gasket(washer)

4.1.1 Flanges shall be made from low carbon Steel sheet conforming to grade DD or EDDof IS 513 or IS 1079. Other metals and/or configurations may be as agreed between themanufacturer and purchaser-.Minimum thicknes of shall be 2.00 mm.

4.1.2 Flange gaskets shall be made from elastomer or Thermoplastics. The specific type ofelastomer and/or configuration may be as agreed between the manufacturer and thepurchaser.

4.2 Bung and Bung Washer

4.2.1 Bungs shall be made from low carbon steel sheet conforming to grade DD or EDD ofIS 513 or IS 1079 or zinc alloy conforming to IS 742. Any other material and/or configuration

may be as agreed between the manufacturer and purchaser. Nominal sheet thickness for thebungs shall be 1.1 to 1.3 mm. Nominal sheet thickness for 50 mm and 20 mm insert shall be1.6 mm and 2 mm respectively.

4.2.2 Bung gaskets shall be made from elastomer or Thermoplastic. The specific types ofelastomer, Thermoplastic and/or configuration may be as agreed between the manufacturerand purchaser.

4.2.3 Capseal

4.2.4 Capseals shall be made from tinplate or blackplate conforming to IS 1993. Othermaterials and/or configurations may be as agreed between the manufacturer and thepurchaser. The minimum sheet nominal thickness shall be 0.30 mm. The capseals may be

plain or printed.

4.2.5 PVC or any other suitable material shall be flowed- in to form capseal gasket forensuring leak proofness.

4.2.6 Tag Ring

Tag ring shall be made from low carbon steel sheet conforming to IS 513. other materialsand/or configuration may be as agreed between supplier and purchaser. Nominal sheetthickness shall be 0.30 mm.

5 MANUFACTURE

5.1 Bungs

Steel bungs shall be deep-drawn, thread rolled and shall have a wrenching insert projectionwelded to the bottom sump of the bung, as shown in fig.3.

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5.1.1 The closures shall fit Go Gauge dimensions conforming to IS 2643 ( part 1 ).

5.1.2 Zinc alloy bungs shall be pressure die-cast and shall conform to Fig.6. Two diagonallyopposite apertures for sealing purposes shall be provided.

5.2 Flange

The flange shall be pressed and machined.

5.3 Capseal

The capseal shall be pressed to the shape.

5.3.1 Tag Ring

The Tag Ring shall be pressed to the required shape.

6 DIMENSIONS AND TOLERANCES

The dimensions of the closures shall be according to Fig.2 to Fig.6.

6.1 For thread: The closures shall fit Go Gauge dimensions conforming to IS 2643 (part 1).

7 FINISHES

The nature of the external and internal finish shall be as agreed between the supplier and thepurchaser.

8 TESTS

8.1 Interchangeability

All flanges and bungs of the same size shall be interchangeable throughout the consignment.

8.2Air P ressure Test

The bung, bung washer and flange should be assembled on a suitable test fixture. Bungshould be tightened to a torque specified below.

Bung Size Minimum Torque Value

50 mm 30 to 35 N.m20 mm 15 to 20 N.m

The assembly shall be subjected to an internal air pressure of 4.0 kg/cm Sq. there shall notbe any drop of pressure or leakage.

8.3 Torque Test for Steel Bungs

8.3.1 The wrenching insert and threads of bung shall withstand, without breakage, thetorque values specified below:


50 mm 220 N.m20 mm 70 N.m

8.3.2 The collar of the bung shall not show any distortion up to the application of torquevalues specified below:


50 mm 80 N.m20 mm 40 N.m

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All dimensions in millimetres

Nominal DimensionsSize of

Flange Steel Flange Flange Gasket

Pitch dia. d1 d2 d3 d4 h1 s1 t1 wd ww wt(Nominal)

0.30 0.30 0.50 0.50 0.30 0.30 1.00 0.50 0.50

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)

50 58.13 62.40 60.40 57.10 15.80 77.90 2.70 60.50 3.25 2.60

20 25.28 29.00 27.20 24.50 12.90 43.70 2.50 27.20 2.40 2.60

NOTE SeeIS 2643 (Part 1) for Go Gauge dimension only.

NOTE See IS 2643 (Part 1) for Go Gauge dimension only.

FIG.2 DIMENSIONS OF FLANGE AND FLANGE GASKET

h1

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`

Nominal DimensionsSize of

Bung Steel Bung Bung Gasket

Pitch dia. d1 p1 p2 p3 wd ww wt(Nominal)

0.50 0.70 0.70 1.00 0.50 0.50

(1) (2) (3) (4) (5) (6) (7) (8)

50 58.13 61.30 53.60 15.50 50.50 2.75 2.70

20 25.13 28.10 20.50 13.70 20.30 2.60 2.50

NOTES1 SeeIS 2543 (Part 1) for Go Gauge dimension only.

2 Dimensions p3 is 13.50 0.50 for 1.25 mm thick sheet.

3 Dimensions p3 is 15.30 0.80 for 1.50 mm thick sheet

FIG.3 DIMENSIONS OF BUNG AND BUNG GASKET

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Nominal

Size ofCapseal Dimensions

d1 d2 h1 h2 w1

(1) (2) (3) (4) (5) (6)

50 69.80 0.50 61.50 1.60 11.50 0.60 09.50 0.60 12.00 1.60

20 35.10 0.50 29.00 0.80 8.30 0.60 6.800.60 10.00 1.60

FIG.4 DIMENSIONS OF CAPSEALS

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NormalSize ofTag Ring Dimensions

d1 d2 d3 d4 d5 h1

(1) (2) (3) (4) (5) (6) ( 7)

50 67.00 1.60 63.50 0.40 86.00 2.60 76.00 1.60 5.00 0.40 6.00 0.40

20 32.00 1.00 31.00 0.40 46.00 1.50 41.00 1.50 5.00 0.40 5.00 0.40

FIG.5 DIMENSIONS OF TAG RING

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of Standard Mark may be granted to manufacturers or producers may be obtained from theBureau of Indian Standards.

Metal Containers Sectional Committee, MTD 32

FOREWORD

This standard was first published in 1971 and subsequently revised in 1977, 1984 and1998. While reviewing the standard in the light of experience gained during these years,the committee decided to revise it to bring in line with the present practices beingfollowed by the Indian and overseas country.

In this revision following modification have been proposed .

REVISION PROPOSAL FOR IS-1784:1998

EXISTINGCLAUSE NO.

SPEC. AS PER ISO-15750

PROPOSEDREVISION

REASON

Clause 2ReferencesIS-1993Clause 4.3.1

ISO 11950 : Coldreduced electrolyticchromium/chromiumoxide-coated steel

To include IS-12591 standardfor Cold reducedTin free steel insheet form

Tin free steel is suitable and iscurrently being used to manufacturecapseals .

Clause 4.1.1 Clause A.2.2. materialand configuration Flanges shall be made

from either mild steelaccording to ISO 3573of ISO 1079, or anyother material suitablefor this intended use.

Grade DD or EDDmay be removed.Nominal sheet

thicknessminimum to berevised to 2.00mm.

If Flange conforms to the testparameters and dimensionalspecification, thickness and grade of

material becomes immaterial and alsoclause mentions other materialand/or other configurations may beagreed

Clause 4.1.2 Clause 3.3Thermoplastics

Thermoplasticmay be added

Thermoplastic is being used by somecustomers.

2 FLANGEFig. 2DimensionsDim. d360.300.7

mm

Table A.1 dim.60.40.3mm

60.40.3mm To be at par with internationalstandard

Fig. 2DimensionsDim. h119.000.4mm

Fig. 2 Dimensions ofFlange and flangegasket - dimension h1-ISO-15750 mentionsheight from top of thebase to top of the neckinstead of overallheight.

h1 = 15.800.5mm

Dimension shall beshown from top ofthe neck to top ofbase.

h1 shall be15.800.5mm

This dimension is more critical andrelevant for manufacture of the flangeand for insertion to the drum top. InIS-1784 this critical dimension has tobe derived from the total height andbase thickness, which leads topossibilities of variation 15.40 to 17.0mmIn the ISO-15750 the critical neckheight is specified as 15.80.5. Thisgives a variation of 15.30mm to

16.30mm, which is desired. However,the dimension of 15.3 is lower than15.40 as new technologies allow forlower thickness of material. Topromote this saving of material, we

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EXISTINGCLAUSE NO.

SPEC. AS PER ISO-15750

PROPOSEDREVISION

REASON

recommend that BIS also incorporate15.30 as the lower limit. Since ourrevision is subsequent to the ISOrevision, we could consider reductionof base thickness t1 from max. 3.2 to3.0mm.

Fig. 2DimensionsDim. t12.800.4mm

2.800.4mm 2.700.30mm As explained above

FLANGEFig. 2Dimensions

Dim. d327.000.7mm

Table A.1 dim.27.200.3mm

27.200.3mm To be at par with internationalstandard

Fig. 2DimensionsDim. h116.000.4mm

Fig. 2 Dimensions ofFlange and flangegasket - dimension h1-ISO-15750 mentionsheight from top of thebase to top of the neckinstead of overallheight.

h1 = 12.900.5mm

Dimension shall beshown from top ofthe neck to top ofbase.

h1 shall be12.900.5mm

As in 2" Flange the critical neck heightshould be indicated. Since most of themajor drum manufacturers are usingtandem die set for insertion & thecritical neck height of 2" flange isreduced by 0.9mm, the same shallapply to 3/4" Flange. Thus neckheight shall be 12.900.5mm as inISO-15750.

2 P LUGSFig 3Dimensionsof Plugs asPlug gaskets 2threads min.

ISO-15750 is silent onno. of threads.

The requirementmay be removed.

Since from closure point of view itcould even be just one threads all thenecessary force is taken by onethread.

This standard has been issued in two parts, the other part in the series is:

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded offin accordance with IS 2:1960 `Rules for rounding off numerical values ( revised), the number ofsignificant places retained in the rounded off value should be the same as that of the specifiedvalue in this standard.

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FORMAT FOR SENDING COMMENTS ON BIS DOCUMENTS

(Please use A4 size sheet of paper only and type within fields indicated. Comments on eachclause/subclause/table/fig etc. be started on a fresh box. Information in column 3 should includereasons for the comments and suggestions for modified working of the clauses when the existingtext is found not acceptable. Adherence to this format facilitates Secretariats work)

NAME OF THE COMMENTATOR/ ORGANIZATION:

DOC. NUMBER AND TITLE:

Sl. No.

(1)

ClauseSubclausePara No.

Commented(2)

Comments/ suggestions

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