# Gas Safety (Management) Regulations 1996, Paragraph 1

Extent: E+W+S

The content and characteristics of the gas shall be in accordance with the values specified in the following table.
Content or characteristic
Value
hydrogen sulphide content
≤5 mg/m3;
total sulphur content (including H2S)
≤50 mg/m3;
hydrogen content
≤0.1% (molar);
oxygen content
≤1.0% (molar), where the gas is conveyed in a pipe operated at a pressure of ≤38 barg, and ≤0.2% molar, where the gas is conveyed in a pipe operated at a pressure of >38 barg;
impurities
shall not contain solid or liquid material which may interfere with the integrity or operation of pipes or any gas appliance (within the meaning of regulation 2(1) of the 1998 Regulations) which a consumer could reasonably be expected to operate;
hydrocarbon dewpoint and water dewpoint
shall be at such levels that they do not interfere with the integrity or operation of pipes or any gas appliance (within the meaning of regulation 2(1) of the 1998 Regulations) which a consumer could reasonably be expected to operate;
RD
≤0.700
WN
(i) ≤51.41 MJ/m3, and
(ii) ≥46.50 MJ/m3;
...
...
...
...

---
Source: https://www.legislation.gov.uk/uksi/1996/551/schedule/3/part/I/paragraph/1 (the official version)
Page: https://openlegislation.uk/gas-safety-management-regulations-1996/schedule-3/part-I/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.