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Enforcement Policy for the replacement of iron gas mains 2006 - 2013 - December 2005

Background

Legal requirements

Industry structure

30 year replacement programmes

Replacement performance since April 2002

30/30 iron mains to be decommissioned (km)
Jan 2002 - March 2003* April 2003 - March 2004 April 2004 - March 2005
Baseline + 10% target 2575 2549 2882
Actual 2846 2673 2847

* The period January 2002 - March 2003 was a 15-month period following publication of HSE's enforcement policy and included 1411 km of medium pressure ductile iron mains [MPDI] which completed removal of 2800km of MPDI to comply with an earlier Improvement Notice.

HSE's iron mains replacement policy

Medium pressure ductile iron [MPDI] mains

Prioritising mains replacement

Monitoring performance

ANNEX 1 - Iron mains requiring decommissioning within 30m of buildings:

  2002/03 2003/04 2004/05 2005/06 2007/07 TOTAL
Baseline 2043 2317 2620 2956 3193 13 128
Baseline +10% 2247 2549 2882 3252 3512 14 442

Table 1 - 30/30 Baseline profile - 91 000 km

chart of km by year baseline

Table 2 - Plan (April 2005) based on replacing 91 000 km

chart of km by year baseline + 10%

Table 3 - Potential profiles for replacing 101 800 km

chart of km by year baseline + 10% + extra

2020-12-15