New Specification for
Installers
A new standard to provide CORGI-registered
gas installers with information they need to know about and apply
to their work has just been published by the British Standards
Institution (BSI).
BS 6400-2:2006 Specification for the installation,
exchange, relocation and removal of gas meters with a maximum
capacity
not exceeding 6 m_/h – medium pressure (2nd family gases)
specifies requirements for the installation, exchange, relocation
and removal of primary gas meters with a maximum capacity not
exceeding 6 m_/h. It is applicable to installations that incorporate
credit or prepayment diaphragm and electronic meters. Installation
includes the design, inspection and commissioning, which are
often performed by the same person.
BS 6400 is a series of three
standards. BS 6400-3:2006 is due for publication later in 2006.
This part of BS 6400 supersedes
BS 6400-1:2002, which is withdrawn.
BS 6400-2 is applicable to primary meter installations:
- Supplied
with second family gases from medium pressure gas distribution
systems operating with a maximum operating pressure
exceeding 75 mbar, but not exceeding 2 bar, and with
a design maximum incidental pressure of 2.7 bar
- Only fitted downstream
of the emergency control valve
- That utilise a pressure control
and protection system contained within a regulator-assembly
that is downstream of the emergency
control valve
- Where all gas fittings subjected to medium
pressure have been preassembled and where strength and
gas tightness testing has
been undertaken on the regulator assembly at the
factory
- Where the operating pressure at the outlet
of the meter is nominally 21 mbar. BS 6400-2:2006 partially
supersedes BS 6400:1997, which will be withdrawn when all three
parts of BS
6400 have been published.
Contact the British Standards Institution
on 0208 996 9001
www.bsonline.bsi-global.com
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