BS 6891:2005+A2:2008
$167.15
Installation of low pressure gas pipework of up to 35 mm (R1 1/4)in domestic premises (2nd family gas). Specification
| Published By | Publication Date | Number of Pages |
| BSI | 2008 | 44 |
The Standard specifies the design, installation and commissioning criteria for steel, copper or corrugated stainless steel semi-rigid pipe, in sizes not exceeding BS 1387 for steel and DN 32 for corrugated stainless steel or copper, low pressure gas installation pipework. This standard applies to gas pipework for the supply of 2nd family gas from the meter to appliances in domestic premises where the nominal working operating pressure is 21 mbar. Those likely to have an interest in the standard will be architects, builders, surveyors, building inspectors, consulting engineers, gas transporters and gas installers. Complying with this standard will ensure a correctly designed, installed and commissioned system that will operate safely in the domestic housing environment.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references |
| 7 | 3 Terms and definitions control valves emergency control valve (ECV) additional emergency control valve (AECV) ducts and voids duct void installation pipework, meters and fittings installation pipework meter installation |
| 8 | meter installation inlet valve primary meter sleeve termination point protected shaft service (pipe) |
| 9 | Typical installation 4 Competence 4.1 Persons carrying out the installation shall be competent. 4.2 The installation work shall be carried out by a business or self-employed person who is a “member of a class of persons approved for the time being by the Health and Safety Executive” (HSE). 4.3 Persons who design the system or installation shall have a knowledge and understanding of the standards and regulations that apply to ensure that the completed work will produce a safe and satisfactory installation. |
| 10 | 5 Design and planning 5.1 Exchange of information and time schedule 5.2 Pipe sizing |
| 11 | Discharge in a straight horizontal pipe with a 1.0 mbar differential pressure between the ends for the gas of relative density 0.6 (air = 1) 6 Materials 6.1 General 6.2 Steel 6.3 Malleable iron |
| 12 | 6.4 Copper 6.5 Polyethylene 6.6 Thread sealing 7 Fittings 7.1 Valves 7.2 Capillary fittings 7.3 Compression fittings 7.4 Push-fit fittings 7.5 Union joints |
| 13 | 7.6 Screwed joints Thread wrapping method 8 Installation 8.1 General 8.2 Connection to the meter installation |
| 14 | 8.3 Jointing 8.4 Safety precautions 8.5 Installation of PE pipework |
| 15 | 8.6 Connection and disconnection of pipes and fittings Use of temporary continuity bond |
| 16 | 8.7 Pipes laid in joisted floors Maximum interval between pipe supports |
| 17 | Limits for notching and drilling of solid timber floor joists |
| 18 | 8.8 Pipes buried in concrete ground floors 8.9 Pipes in walls |
| 20 | Typical examples of buried pipe |
| 21 | Typical examples of buried pipe |
| 22 | Typical examples of buried pipe |
| 23 | Typical examples of pipes in masonry and timber frame walls |
| 24 | Typical examples of pipes in masonry and timber frame walls |
| 25 | Typical examples of pipes in masonry and timber frame walls |
| 26 | Typical examples of pipes in masonry and timber frame walls |
| 27 | 8.10 Sleeves 8.11 Pipework in ducts Free area of ventilation openings |
| 28 | 8.12 Multi-dwelling buildings |
| 29 | Typical installation pipework in multi-storey buildings containing flats or maisonettes |
| 30 | Typical installation pipework in multi-storey buildings containing flats or maisonettes |
| 31 | 8.13 Gas pipework inside a protected shaft containing a stair and/or lift or other protected fire escape route 8.14 Pipe supports and fixings 8.15 Exterior pipework Buried external pipework |
| 32 | Typical exterior pipework 8.16 Interrelation with other services |
| 34 | Position of main equipotential bonding connection Typical notification where main equipotential bonding is found not to be present 8.17 Valves |
| 35 | 9 Prevention of corrosion and degradation 9.1 General |
| 36 | 9.2 Buried pipework 10 Gas tightness testing and purging |
| 37 | (informative) Guide for sizing gas supplies (informative) Guide for sizing gas supplies |
| 38 | Example of a pipe-sizing calculation |
| 39 | Sizing results |
| 40 | Example of a pipe-sizing calculation |
| 41 | Sizing results |
