I.S. 820:2010

Declaration
Foreword
1 Scope
2 References
3 Definitions
4 Design
5 Construction
6 Testing of pipework
7 Pipework commissioning
8 Admission of gas
9 Declaration of conformance
10 Use and maintenance
11 Appliances
Annex A (Informative) Gas characteristics
Annex B (Normative) Gas supply systems
Annex C (Informative) Open flue appliances, flue design
        considerations
Annex D (informative) Declarations and notices
Annex E (Normative) Safety inspections of existing non-domestic
        installations
Annex F (Informative) Examples of pipework configurations
Annex G (Informative) (Excerpt from) The Gas Appliance Directive
        (GAD)
Annex H (Normative) Service shaft ventilation
Annex I (normative) Educational establishments - requirements
Annex J (informative) Guidelines for the construction of joints
Annex K (informative) Guidelines for the construction of welded,
        brazed, soldered joints and polyethylene fusion joints
Annex L (informative) Guidelines for the construction of pressed
        joints
Annex M (informative) Guidelines for the construction of stainless
        steel pliable corrugated pipework systems
Annex N (informative) Environment checklist
Bibliography

Defines the requirements for natural gas and LPG installations in commercial and public access buildings at maximum operating pressures not exceeding 5 bar and industrial gas installations at maximum operating pressures not exceeding 0,5 bar, from the point of delivery up to and including the appliance(s) in non-domestic premises.