UGANDA STANDARD  
  DUS 2240 
First  Edition  
2020 -03-03 
 
 
 Reference number  
DUS 2240:2020  
© UNBS 2020   
  
Metallic crown caps — Specification  
 DUS 2240:2020  
ii © UNBS 2020  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct appl ication  
© UNBS 2020   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission fr om UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2240:2020  
© UNBS 2020  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Material  ................................ ................................ ................................ ................................ ...................  1 
5 Dimensions  ................................ ................................ ................................ ................................ ............  1 
5.1 Crown cork specifications  ................................ ................................ ................................ ....................  2 
5.2 Pry off crown profiles ................................ ................................ ................................ ............................  2 
5.3 Twist off / Universal crown profiles  ................................ ................................ ................................ ..... 3 
6 Packaging and storage  ................................ ................................ ................................ .........................  3 
7 Marking ................................ ................................ ................................ ................................ ...................  4 
Bibliography  ................................ ................................ ................................ ................................ ........................  5 
 DUS 2240:2020  
iv © UNBS 2020  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under  Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food S tandards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given  field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general p ublic for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 19, Packaging and packaging 
products . DUS 2240:2020  
© UNBS 2020  – All rights reserved  v 
 Introduction  
Metal crown caps are well known because of their strict association with glass bottles. In fact, crowns are 
generally connected to carbonated soft-drinks and  alcoholic beverages . 
Efficient packaging is of g reat importance for the distribution and the protection of goods  to ensure food 
safety . Insufficient or inappropriate packaging can lead to damage or wastage of the contents of the pack.  
 DRAFT UGANDA STANDARD  DUS 2240:2020  
 
© UNBS 2020 – All rights reserved  1 
 Metallic crown caps — Specification  
1 Scope   
This draft Uganda standard specifies  requirements for metallic crown caps designed to secure seal in capping 
applications with glass and aluminium bottles in the brewing and beverage industry.  
2 Normative references   
The following referenced documents referred to in the text in  such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
ISO 119 50, Cold-reduced tinmill products — Electrolytic chromium/chromium oxide -coated steel  
ISO 11949, Cold-reduced tinmill products — Electrolytic tinplate  
3 Terms and definitions   
No terms and definitions are listed in this document.  
ISO and IEC maintain term inological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Material  
4.1 Metal crown caps shall be made from Tin Free Steel (TFS) conforming to ISO 11950. or Electrolytic  
Tinplate conforming to ISO 11949 . 
4.2 Liners shall be made of Thermoplastic Elastomers (TPE), such as Polyolefin Elastomers. They shall be 
made from food grade materials conforming to US 1659 with proper sealing ability . 
4.3 The crown cap shall have eithe r a stone finish or matt finish . 
5 Dimensions  
Dimensions of crown caps shall be as given in Figures 1, 2, 3 and 4.  DUS 2240: 2020  
2 © UNBS 2020  – All rights reserved  
 5.1 Crown cork specifications  
 
 
Figure 1 — Dimensions of crown cork  
 
5.2 Pry off crown profiles  
 
Figure 2 — Dimensions of pry off crown caps  (Profile 916)  DUS 2240 : 2020  
© UNBS 2020  – All rights reserved  3 
 
 
Figure 3 — Dimensions of  pry off crown caps (Profile 923 ) 
5.3 Twist off / Universal crown profiles  
 
Figure 4 — Dimensions of t wist off /  Universal crown profiles  (profile 917)  
6 Packaging and storage  
6.1 Crown caps shall be packaged in one of the following;  
a) strong carton boxes with inner polyethylene bag for protection;  
b) one way strong bulk octabins; or  DUS 2240: 2020  
4 © UNBS 2020  – All rights reserved  
 c) one way heat treated and fumigative p allets.  
6.2 All pallets shall be wrapped with stretch film for protection  of the crown caps . 
6.3 All packaging materials shall be  recycl able. 
6.4 Crown caps shall be packaged, stored and transported in a clean and dry environment , away from 
direct sunlight  and at temperatures not exceeding more than 40 °C. 
7 Marking  
The bulk package of the crown caps shall be marked with the following information;  
a) Name and /or trade mark of the manufacturer and physical address ; 
b) Sealing  force  for twist off crowns ; 
c) Opening t orque  for twist off crowns ; 
d) Shelf life ; 
e) Batch number  
f) Storage instructions ; and  
g) Reference number of this standard  DUS 2240 : 2020  
© UNBS 2020  – All rights reserved  5 
 Bibliography  
TP-101.2 :2010 , crown cork specifications  
 DUS 2240 : 2020  
© UNBS 2020 – All rights reserved  7 
 Certification marking  
Products that conform to Uganda standards may be marked with Ugan da National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certi fication mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of  that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further pa rticulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 2240: 2020    
 
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