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BS 3636:1963

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Methods for proving the gas tightness of vacuum or pressurized plant

Available format(s)

Hardcopy , PDF

Superseded date

15-05-2001

Language(s)

English

Published date

12-08-1963

Co-operating organizations
Foreword
Introduction
      Gas tightness
      Units
      Symbols
      Definitions
      Designation of proving methods
      Review of proving methods
      Gas tightness of test apparatus
      Leak location
      Comparison of proving methods
Vacuum methods
V.1 Pumping
V.2 Pressure rise
VS.1 Infra-red absorption (plant evacuated)
VS.2 Halide diode
VS.3 Mass spectrometer
VS.4 Thermal conductivity vacuum gauge
      A. Fitted to plant
      B. Specially adapted for leakage probing
VS.5 Ionization vacuum gauge
VS.6 Ionization vacuum gauge with palladium barrier
VS.7 Thermionic cathode diode vacuum gauge
Pressure methods
Precautions against rupture of pressurized plant
P.1 Flow rate
P.2 Pressure drop
      A. With constant temperature
      B. With varying temperature
PS.1 Infra-red absorption, flow measurement
      A. Plant pressurized
      B. Hood pressurized
PS.2 Infra-red absorption, accumulation
      A. Plant pressurized
      B. Hood presurized
Appendices
A Design of plant bearing in mind the need for
      proving
B Recommendations relating to contracts
C Blockage of capillary leaks
D Comparison of leak rates of different fluids
E Method V.2 pressure rise: time saving techniques
      in the presence of outgassing
F Method V.2 pressure rise: check for leakage across
      the isolating valve
G Search gas methods: pumping systems
H Search gas methods: best pumping speed
J Reference leaks
K The refrigerated trap
L The chemical trap
M The charcoal trap
N Worked examples
O Leak location
P Safety precautions
Q Bibliography
R Conversion factors
Index

Ten methods for application to evacuated plant, seven to pressurized plant. Five involve direct measurement of quantities but are insensitive or lengthy. Others use search gas and detectors sensitive to such gas. Four use vacuum gauges which may be able to serve another purpose on plant. Each method describes apparatus, special precautions, procedure, interpretation of results, working principles, sensitivity. Design of plant; contracts; blockage of capillary leaks; leak rates of different fluids; worked examples; safety precautions; bibliography; methods of leak location.

Committee
WEE/46
DocumentType
Standard
Pages
120
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

BS 1756-4:1977 Methods for sampling and analysis of flue gases Miscellaneous analyses
PD 5500:2000 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
ISO 14644-7:2004 Cleanrooms and associated controlled environments — Part 7: Separative devices (clean air hoods, gloveboxes, isolators and mini-environments)
01/121101 DC : DRAFT MAR 2001 BS EN ISO 14644-7 - CLEANROOMS AND ASSOCIATED CONTROLLED ENVIRONMENTS - PART 7: SEPARATIVE ENCLOSURES (CLEAN AIR HOODS, GLOVEBOXES, ISOLATORS, MINI-ENVIRONMENTS)
BS 3895:1976 Guide to the design, testing and use of packaging for the safe transport of radioactive materials
BS EN ISO 14644-7:2004 Cleanrooms and associated controlled environments Separative devices (clean air hoods, gloveboxes, isolators and mini-environments)
BS EN 12298:1998 Biotechnology. Equipment. Guidance on testing procedures for leaktightness
EN ISO 14644-7:2004 Cleanrooms and associated controlled environments - Part 7: Separative devices (clean air hoods, gloveboxes, isolators and mini-environments) (ISO 14644-7:2004)
EN 12298:1998 Biotechnology - Equipment - Guidance on testing procedures for leaktightness
BS 3351:1971 Specification for piping systems for petroleum refineries and petrochemical plants
DIN EN ISO 14644-7:2005-01 Cleanrooms and associated controlled environments - Part 7: Separative devices (clean air hoods, gloveboxes, isolators and mini-environments) (ISO 14644-7:2004); German version EN ISO 14644-7:2004

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