This standard BS 2797:1976 Specification for leathers for gas meter diaphragms is classified in these ICS categories:
75.200 Petroleum products and natural gas handling equipment
This British Standard specifies requirements for finished leathers for use in diaphragms of gas meters intended for use with natural gas. Two types of leather are specified.
Type 1. E.I. sheepskin leather, manufactured as described in outline in Appendix A.
Type 2. Split hide leather, manufactured as described in outline in Appendix B.
Two types - E.1. sheepskin leather and split hide leather. Requirements, methods