- Latest available (Revised)
- Original (As made)
This is the original version (as it was originally made). This item of legislation is currently only available in its original format.
7.—(1) A pressure relief valve which is fitted to a part of a gas system (including a gas container) shall—
(a)be made entirely of suitable metal and so constructed and fitted as to ensure that the cooling effect of the gas during discharge shall not prevent its effective operation,
(b)be capable, under the most extreme temperatures likely to be met (including exposure to fire), of a discharge rate which prevents the pressure of the contents of the gas system from exceeding its design pressure,
(c)have a maximum discharge pressure not greater than the design pressure of the gas container,
(d)be so designed and constructed as to prevent unauthorised interference with the relief pressure setting during service, and
(e)have outlets which are—
(i)so sited that so far as is reasonably practicable in the event of an accident the valve and its outlets are protected from damage and the free discharge from such outlets is not impaired, and
(ii)so designed and constructed as to prevent the collection of moisture and other foreign matter which could adversely affect their performance.
(2) The pressure at which a pressure relief valve is designed to start lifting shall be clearly and permanently marked on such valve.
(3) A pressure relief valve which is fitted to a gas container shall communicate with the vapour space in the gas container and not with any liquefied gas.
The Whole Rule you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
The Whole Rule you have selected contains over 200 provisions and might take some time to download.
Would you like to continue?
The Whole Rule you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area.
Original (As Enacted or Made): The original version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.
Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:
Use this menu to access essential accompanying documents and information for this legislation item. Dependent on the legislation item being viewed this may include:
Click 'View More' or select 'More Resources' tab for additional information including: