IS 1784:............. Doc MTD 32 (5079)W

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Indian Standard

SCREWED CLOSURES FOR DRUMS SPECIFICATION (Third Revision)

Not to be reproduced without permission Last date of receipt Of 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 alloy closures 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 below were valid. All the standards are subject to revision, and parties to agreement based on this standard are encouraged to investigate the possibility applying the most recent edition of the standard.

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 for 1975 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 used for the manufacture of different components of steel closures shall be as given in 4.1, 4.2, 4.3 and 4.4. Supply of capseal and tag ring with closures is optional and as agreed between the 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 EDD of IS 513 or IS 1079. Other metals and/or configurations may be as agreed between the manufacturer 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 of elastomer and/or configuration may be as agreed between the manufacturer and the purchaser. 4.2 Bung and Bung Washer

4.2.1 Bungs shall be made from low carbon steel sheet conforming to grade DD or EDD of IS 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 the bungs shall be 1.1 to 1.3 mm. Nominal sheet thickness for 50 mm and 20 mm insert shall be 1.6 mm and 2 mm respectively.

4.2.2 Bung gaskets shall be made from elastomer or Thermoplastic. The specific types of elastomer, Thermoplastic and/or configuration may be as agreed between the manufacturer and purchaser. 4.2.3 Capseal

4.2.4 Capseals shall be made from tinplate or blackplate conforming to IS 1993. Other materials and/or configurations may be as agreed between the manufacturer and the purchaser. 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 for ensuring leak proofness. 4.2.6 Tag Ring

Tag ring shall be made from low carbon steel sheet conforming to IS 513. other materials and/or configuration may be as agreed between supplier and purchaser. Nominal sheet thickness shall be 0.30 mm. 5 MANUFACTURE

5.1 Bungs Steel bungs shall be deep-drawn, thread rolled and shall have a wrenching insert projection welded 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 diagonally opposite 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 the purchaser. 8 TESTS 8.1 Interchangeability All flanges and bungs of the same size shall be interchangeable throughout the consignment. 8.2 Air Pressure Test

The bung, bung washer and flange should be assembled on a suitable test fixture. Bung should be tightened to a torque specified below. Bung Size Minimum Torque Value 50 mm 30 to 35 N.m 20 mm 15 to 20 N.m The assembly shall be subjected to an internal air pressure of 4.0 kg/cm Sq. there shall not be 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, the torque values specified below: Bung Size Minimum Torque Value

50 mm 220 N.m 20 mm 70 N.m

8.3.2 The collar of the bung shall not show any distortion up to the application of torque values specified below: Bung Size Minimum Torque Value 50 mm 80 N.m 20 mm 40 N.m

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All dimensions in millimetres

Nominal Dimensions Size 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 – See IS 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 Dimensions Size 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 NOTES 1 See IS 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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All dimensions in millimetres Nominal Size of Capseal 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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All dimensions in millimetres Normal Size of Tag 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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All dimensions in millimetres Nominal Size Dimensions of Zinc Bung d1 d2 d3 p1 p2 0.80 0.80 0.40 0.40 (1) (2) (3) (4) (5) (6) 50 57.63 to 58.13 61.00 56.00 14.80 3.00 20 24.68 to 25.13 28.00 22.50 13.50 3.00 NOTES 1 See IS 2643 (Part 1) for thread profile only.

FIG.6 DIMENSIONS OF ZINC BUNG

8.4 Curling Test for Flanges

The curling test shall be performed on 1 in 1000 flanges and shall be done on a fixture similar to the flange insertion die. The flange shall not show any crack/leak during curling through 160 .

9 MARKING

9.1 Each bung and flange shall be marked legibly and indelibly with the markings as agreed to between the manufacturer and the purchaser. 9.2 BIS Certification Marking

The product may also be marked with the standard Mark.9.2.1 The use of the Standard Mark is governed by the provision of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made there under. The details of conditions under which the licence for the use

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of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. Metal Containers Sectional Committee, MTD 32 FOREWORD This standard was first published in 1971 and subsequently revised in 1977, 1984 and 1998. 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 being followed by the Indian and overseas country. In this revision following modification have been proposed .

REVISION PROPOSAL FOR IS-1784:1998

EXISTING CLAUSE NO.

SPEC. AS PER ISO-15750

PROPOSED REVISION

REASON

Clause 2 References IS-1993 Clause 4.3.1

ISO 11950 : Cold reduced electrolytic chromium/chromium oxide-coated steel

To include IS-12591 standard for Cold reduced Tin free steel in sheet form

Tin free steel is suitable and is currently being used to manufacture capseals .

Clause 4.1.1 Clause A.2.2. material and configuration – Flanges shall be made from either mild steel according to ISO 3573 of ISO 1079, or any other material suitable for this intended use.

Grade DD or EDD may be removed. Nominal sheet thickness minimum to be revised to 2.00 mm.

If Flange conforms to the test parameters and dimensional specification, thickness and grade of material becomes immaterial and also clause mentions ‘other material and/or other configurations may be agreed’

Clause 4.1.2 Clause 3.3 Thermoplastics

Thermoplastic may be added

Thermoplastic is being used by some customers.

2” FLANGE Fig. 2 Dimensions Dim. d3 60.30±0.7 mm

Table A.1 – dim. 60.4±0.3mm

60.4±0.3mm To be at par with international standard

Fig. 2 Dimensions Dim. h1 19.00±0.4 mm

Fig. 2 Dimensions of Flange and flange gasket - dimension h1- ISO-15750 mentions height from top of the base to top of the neck instead of overall height. ‘ h1 = 15.80±0.5mm

Dimension shall be shown from top of the neck to top of base. ‘h1 shall be 15.80±0.5mm

This dimension is more critical and relevant for manufacture of the flange and for insertion to the drum top. In IS-1784 this critical dimension has to be derived from the total height and base thickness, which leads to possibilities of variation 15.40 to 17.0 mm In the ISO-15750 the critical neck height is specified as 15.8±0.5. This gives a variation of 15.30mm to 16.30mm, which is desired. However, the dimension of 15.3 is lower than 15.40 as new technologies allow for lower thickness of material. To promote this saving of material, we

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EXISTING CLAUSE NO.

SPEC. AS PER ISO-15750

PROPOSED REVISION

REASON

recommend that BIS also incorporate 15.30 as the lower limit. Since our revision is subsequent to the ISO revision, we could consider reduction of base thickness t1 from max. 3.2 to 3.0mm.

Fig. 2 Dimensions Dim. t1 2.80±0.4 mm

2.80±0.4mm 2.70±0.30mm As explained above

¾” FLANGE Fig. 2 Dimensions Dim. d3 27.00±0.7 mm

Table A.1 – dim. 27.20±0.3mm

27.20±0.3mm To be at par with international standard

Fig. 2 Dimensions Dim. h1 16.00±0.4 mm

Fig. 2 Dimensions of Flange and flange gasket - dimension h1- ISO-15750 mentions height from top of the base to top of the neck instead of overall height. ‘ h1 = 12.90±0.5mm

Dimension shall be shown from top of the neck to top of base. ‘h1 shall be 12.90±0.5mm

As in 2" Flange the critical neck height should be indicated. Since most of the major drum manufacturers are using tandem die set for insertion & the critical neck height of 2" flange is reduced by 0.9mm, the same shall apply to 3/4" Flange. Thus neck height shall be 12.90±0.5mm as in ISO-15750.

2” PLUGS Fig 3 Dimensions of Plugs as Plug gaskets – 2½ threads min.

ISO-15750 is silent on no. of threads.

The requirement may be removed.

Since from closure point of view it could even be just one threads all the necessary force is taken by one thread.

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, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 `Rules for rounding off numerical values (revised), the number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

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