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BS EN 88:1991

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Pressure governors for gas appliances for inlet pressures up to 200 mbar

Available format(s)

Hardcopy , PDF

Superseded date

31-12-2007

Language(s)

English

Published date

29-11-1991

Cooperating organizations
National foreword
Foreword
1. General
1.1 Object and field of application
1.2 References
1.3 Definitions
1.4 Classification
1.5 Measuring ratio
2. Construction requirements
2.1 General
2.2 Materials
2.3 Connections
2.4 Seals for glands for moving parts
2.5 Pressure test nipples
3. Performance requirements
3.1 General
3.2 Putting the governor out of action
3.3 External leak-tightness
3.4 Torsion and bending
3.5 Durability
3.6 Governor performance
3.7 text deleted
3.8 Durability of performance
3.9 Lock-up pressure
4. Test methods
4.1 General
4.2 Putting the governor out of action
4.3 External leak-tightness
4.4 Torsion and bending
4.5 Durability
4.6 Governor performance
4.7 text deleted
4.8 Durability of performance
4.9 Lock-up pressure
5. Marking, installation and operating instructions
5.1 Marking
5.2 Installation, operating and servicing instructions
5.3 Warning notice
Annexes
A. Characteristics of combustible gases
B. Typical governors and governor parts
C. Use of ISO 7-1: 1982 and ISO 228-1: 1982 threads
      for gas connections
D. Leak-tightness test - volumetric method
E. Leak-tightness test - pressure loss method
F. Conversion of pressure loss into leakage rate
G. Summary of requirements and test conditions
Tables
1. Connection sizes
2. Maximum external leakage rates
3. Torque and bending moment
4. Gas pressure at inlet to the governor
5. Outlet pressure variation from the outlet setting
      pressure
6. Sequence of testing
7. Tightening torque for flange bolts to ISO 7005-2:
      1988
Figures
1. Arrangement for torsion test
2. Arrangement for bending test
3. Paint scratch test apparatus
4. Governor performance test rig
5. Graph of performance using inlet pressure variation
6. Graph of performance using flow rate variation
7. Types of constant pressure governor (diagrammatic)
8. Apparatus for testing leak-tightness (volumetric
      method)
9. Apparatus for testing leak-tightness (pressure loss
      method)

Requirements and methods of test for pressure governors for use with gas appliances for nominal size up to and including DN 50. Does not cover governors connected directly to mains pipework or for installation out of doors and exposed to the environment.

Committee
GSE/22
DevelopmentNote
Supersedes 77/73411 DC and BS 6448-1(1987) (09/2005)
DocumentType
Standard
Pages
34
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

BS 7977-2:2003 Specification for safety and rational use of energy of domestic gas appliances Combined appliances. Gas fire/back boiler
BS EN 297:1994 Gas-fired central heating boilers. Type B<sub>11</sub> and B<sub>11BS</sub> boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW
BS 5991:2006 Specification for indirect gas fired forced convection air heaters with rated heat inputs greater than 330 kW but not exceeding 2 MW for industrial and commercial space heating. Safety and performance requirements (excluding electrical requirements) (2nd family gases)
BS 6644(2005) : 2005 SPECIFICATION FOR INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70 KW (NET) AND 1.8 MW (NET) (2ND AND 3RD FAMILY GASES)
BS 5990:2006 Specification for direct gas-fired forced convection air heaters with rated heat inputs greater than 330 kW but not exceeding 2 MW for industrial and commercial space heating. Safety and performance requirements (excluding electrical requirements) (2nd family gases)
BS 6644:2011 Specification for the installation and maintenance of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases)
11/30229801 DC : 0 BS 6644 - SPECIFICATION FOR THE INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70 KW (NET) AND 1.8 MW (NET) (2ND AND 3RD FAMILY GASES)
EN 297:1994/A2:1996/AC:2006 GAS-FIRED CENTRAL HEATING BOILERS - TYPE B[11] AND B[11BS] BOILERS FITTED WITH ATMOSPHERIC BURNERS OF NOMINAL HEAT INPUT NOT EXCEEDING 70 KW
BS 7977-1:2002 Specification for safety and rational use of energy of domestic gas appliances Radiant/convectors
03/310868 DC : DRAFT JUNE 2003 BS 6644 - SPECIFICATION FOR INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70KW (NET) AND 2MW (GROSS) (2ND AND 3RD FAMILY GASES)

ISO 7005-2:1988 Metallic flanges — Part 2: Cast iron flanges
ISO 274:1975 Copper tubes of circular section — Dimensions
BS 3643-1:1981 ISO metric screw threads Principles and basic data
ISO 6708:1995 Pipework components Definition and selection of DN (nominal size)
BS 1387:1985 Specification for screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads
ISO 301:2006 Zinc alloy ingots intended for castings
IEC 60730-1:2013+AMD1:2015 CSV Automatic electrical controls - Part 1: General requirements

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