BS/EN 17177-2019 pdf download.Glass packaging – Crown cap-26 mm diameter , 6 mm height crown cap.
This BS/EN 17177 specifies the dimensional requirements for the 26 mm diameter. 6 mm height crown cap. lined with a plastic gasket and designed to seal bottles with neck finishes foreseen for pry-off or twist-crown applications.
It specifies the dimensional requirements that are of direct importance to the customer/bottler and recommendations for cap application.
The gasket material and profile are not specified as a number of different profiles are available depending on the end use and supplier specific technology. The requirement placed on the gasket profile design is that it needs to be fit for purpose used in conjunction with glass finishes in reference.
2 Normative references
The following documents are 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.
EN 10202. Cold reduced tinmill products — Electrolytic tin plate and electrolytic chromium/chromium oxide coated steel
3 Term and definition
For the purposes of this document, the following term and definition applies.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia. available at http://wwieciropei.a&rgJ
— ISO Online browsing platform: available at httpjJwwwiso.org/obp
3.1
6 mm height crown cap
crown cap with an overall height of 6 mm before application
4 Dimensions
The cap dimensions are specified in TabLe 1 and Figure 1.
5 Material
The shell is normally made from TP (Tinplate) or ECCS (Electrolytic Coated Chromium Steel) as specified by EfLW2D2. with mechanical properties TS/T1I 230 up to 620. Further classes of steel in terms of mechanical properties may be considered in agreement between the cap manufacturer and the filler. in particular if lower steel thickness is considered.
6 Requirements and recommendations for cap application
6.1 Due to the wide range of performance requirements associated with this type of closure it is strongly recommended that fillers carry out appropriate qualification tests of the closure for a given application before commercial production.
6.2 Crowns made from steel with metal thicknesses below 0,22 mm require specific liner profiles and/or liner materials as well as specific filling/closing control parameters (e.g. crowner settings). Steel thickness down-gauging shall be agreed between fillers and suppliers of caps and bottles.
6.3 Taking into account the respective tolerances, the differences between the geometry of the crown and the bottle neck finish have to be evaluated for the required seal performance. Double or single lip liner profiles are available.
6.4 Application and implementation of crowns caps according to the current document has to be performed in accordance with the cap supplier requirements.
6.5 The conformity of the final product Is to be evaluated after the complete bottling process.
6.6 Crown-cap performance evaluation of caps on dummy steel neck finishes to be agreed between user and manufacturer.
6.7 Stacking and pallet handling of capped products should be carried out with due care so as not produce harmful degradation of the closure. Any modifications to stacking and handling conditions shall be subject of the relevant analysis to ensure the absence of negative impact.
6.8 Degradation related to crown application may be at the origin of the development corrosion in the presence of moisture. The usual recommendations on rinsing / drying shall be followed to prevent these phenomena.BS/EN 17177-2019 pdf download.