AS 4186-1994 pdf free.Screwcap bottles for microbiological use (McCartney bottles).
AS 4186 specifies the requirements for screwcap glass bottles suitable for use in microbiological laboratories as culture bottles.
NOTES:
1 Clause 6 specifies type tests that are performed to assess compliance of finished product with this Standard. However, it may also be convenient for product manufacturers to use these tests for quality control purposes.
2 Alternative methods for determining compliance of a lot with this Standard are given in Appendix A.
3 DEFINITIONS For the purpose of this Standard, the definitions below apply.
3.1 Nominal capacity-volume of liquid which a bottle will contain when filled to the base of the neck.
3.2 Seal-the system which enables the contents of the bottle to be isolated from the external environment.
3.3 Transition zone-curved part of the bottle where a change in direction occurs in the linear outline of the bottle, for example between base and sidewall or sidewall and neck.
4 MATERIALS
4.1 Bottle The bottle shall be made from clear, colourless glass free of particulate matter and having thermal properties which meet the requirements of the test outlined in Appendix B.
4.2 Cap The cap shall be made of material which is resistant to the conditions of normal use, including washing and sterilization procedures
The cap shall be sufficiently strong and rigid so as not to crack or distort when being screwed onto the bottle.
4.3 Insert The insert shall be made of an elastic material which is chemically inert and retains its shape under normal conditions of use.
NOTE: Sealing inserts may be moulded into the cap.
DESIGN REQUIR EMENTS
5.1 Bottle
5.1.1 Shape The shape of the bottle shall be similar to those illustrated in Figure 1, and shall be such that the capacity to the brim is approximately 15 percent greater than the nominal capacity. The walls may be slightly tapered. The base of the bottle shall have a radius which provides a smooth transition between the base and the wall, similarly the shoulder shall have a radius which provides a smooth transition between the wall and the neck.
NOTE: Internal stresses are most likely to occur in the transition zone of the bottle.AS 4186 pdf download.