IGEM/SR/4 Edition 3
Variable Volume Gasholders Storing Lighter than Air Gases
IGEM has long history of publishing articles, guidance and
Standards on Gasholders, with the first official "Recommendations"
published in 1986.
IGEM/SR/4 Edition 3 has now been published as an Industry
Standard (May 2011) which is the result of a review of Edition 2
(1996) which is now obsolete.
Primarily, the Standard aims to highlight aspects which may put
the gasholder or persons working on the gasholder, or members of
the public, at risk.
It covers gases which are lighter than air however, many of the
requirements will also apply for gasholders storing heavier than
New Edition - What has
To start with the title of both this Standard
and IGEM/SR/14 were altered to remove the reference to high and low
pressure. In addition the definitions of the different types of
gasholder have been updated (see IGEM/G/4).
In Edition 2, limited advice was given on
purging, as it required readers to be conversant with IGE/SR/22
(Purging Operations). Whilst IGE/SR/22 is still the relevant
Standard to work to, this Edition now gives an appreciation of the
requirements given in IGE/SR/22.
With regard to Control Systems, terminology has
now been aligned with the recently revised Edition of IGEM/SR/15.
More significantly, practical advice has been included such as,
information on the emptying and filling of multi-gasholder
Edition 3 now has a Section on Demolition. This
specialist activity is governed by numerous Acts and Legislation,
but is principally subject to the Management of Health and Safety
at Work Regulations and Construction (Design and Management)
Regulations. The key aim of the Legislation is to ensure that
employers adequately assess the risks associated with their work
and to integrate health and safety into the planning and management
of projects by the early identification of hazards. Once the
hazards are identified, they can be eliminated or reduced where
possible at the design or planning stages and thereafter remaining
risks can be appropriately managed and controlled during the
construction, operation and demolition phases.