1 Scope
2 Normative references
3 Terms and definitions
4 Dimensions, materials and finish
5 Design and construction
5.1 Flanges
5.2 Plugs
5.3 Capseals and overseals
5.4 Label rings and protection rings
Annex A (normative) - Octagonal base closure system
(type A closure)
Annex B (normative) - Serrated base closure system
(type B closure)
Annex C (normative) - Octagonal(G 2)/hexagonal (G 3/4)
base closure system (type C closure)
Annex D (informative) - Plug wrench adaptors
Annex E (informative) - Closing torques
Bibliography