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Network Innovation Allowance (NIA) – Project APPEAL
Environmentally Acceptable Wood Pole Pre-treatment Alternatives to Creosote: Review of Potential Products and Initial Efficacy Tests
With a potential ban on the use of creosote in the UK, several UK Power Companies and The UK National Grid, commissioned an extended, independent decay and associated strength testing from 2017 on a range of creosote alternatives.
The new test report published by Freedom, part of NG Bailey and a provider of technical engineering and maintenance services, shows that preservative-treated samples all suffered loss of strength after decay testing, whilst the preservative-treated samples protected with Polesaver sleeves did not lose strength. This clearly demonstrates the effectiveness of Polesaver Total Ground-line Barrier Sleeves.
The study had been commissioned to examine the best Creosote alternatives for wood post-preservation in light of the Creosote ban coming into effect in Europe.
Approved for funding by Ofgem under the Network Innovation Allowance Scheme, the test is an extended, accelerated, fungal decay test which generally has good correlation with real life performance.
In the study, three commercially available wood preservative options are compared. All were tested with & without, partial and total barrier sleeves:
The results of the test showed that treating the stakes with wood preservative and applying a Polesaver total ground line barrier sleeve prevented loss of strength over time.
The results of The APPEAL test report have recently been published on the UK Energy Network Association [ENA] website. Download the PDF here: 2023 – APPEAL POLESAVER report
Summary of Key Data
In this independent, accelerated test, preservative-treated samples were compared with preservative-treated samples fitted with both partial & total ground line barrier sleeves and untreated control samples.
After 48 months the samples were subjected to mechanical break testing to establish the modulus of rupture (strength) of the samples. Most utilities allow for a maximum loss of strength of up to 50% when sizing poles with poles normally being replaced at this point.
The table below shows the comparison of the strength of preservative-treated wood after 48 weeks of accelerated decay testing.
These results clearly demonstrate the effectiveness of Polesaver total ground line barrier technology in preventing decay and loss of strength over time.
Polesaver protected poles have been successfully used by UK distribution network operators since 2013 as an alternative to Creosote preservative treatment.
Polesaver manufactures and supplies guaranteed products that are proven to increase the life of utility poles. With millions of sleeves supplied to date, our patented ground-line barrier sleeves have been proven in volume use since 1994.
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*Polesaver uses long term independent test data on the effectiveness of barrier sleeves and fire protection fabric to reach all the conclusions given on this website (test data available on request). Based on this data, Polesaver believes longer life, maintenance of strength over time, improved safety and reliability, extended inspection periods and reduced maintenance requirements are reasonable claims. This is subject to Polesaver products being correctly applied as per our instructions and used on correctly preservative treated (for long term in-ground use - use class 4 or higher) wooden utility poles that are free of decay at the time of sleeve application. The claims made, real or implied are not warranties. It is the responsibility of the user to evaluate and satisfy themselves that the performance of the product meets their specific safety, reliability, extended inspection, repair and any other performance or cost-benefit criteria before using Polesaver sleeves or fire protection fabric.