project | Field-applied coating
Denso secures major Indian rehabilitation contract
Denso wins contract to supply 2.4m square metres of corrosion protection products for Indian Oil Corporation’s pipeline rehabilitation programme
Indian Oil Coporation (IOCL) – the largest pipeline operator in India – has selected tape-based coating technology from Germany’s Denso as part of the ongoing rehabilitation of its more than 11,000km network of oil, petrochemical and gas pipelines. Denso is to supply coating
materials to protect more than 2.4m m2
of IOCL pipelines,
which will be rehabilitated while in operation. The system tendered by the German company comprises its Densolen AS39P/R20HT combination of a three-ply inner and a two-ply outer polyethyl- ene/butyl tape, which is claimed to offer very good technical performance and easy application in the field. Parts of ICOL’s pipeline
network have been in continu- ous operation for more than 40 years. Denso Germany says it has previously supplied more than 2.6m m2
of the Densolen
AS39P/R20HT Tape System to IOCL for rehabilitation operations. This latest 2.4m m2 contract will be fulfilled in batches over the period from 2014 and 2015 and will be used to rehabilitate around 320km of oil pipeline. IOCL’s requirement for
pipeline rehabilitation is that the coating should provide
protection from corrosion for at least a further 40 years. The company’s technical commit- tee is convinced the three-ply/ two-ply polyethylene/butyl tape system technology can deliver this performance, according to Denso. Denso says its Densolen
corrosion protection tapes and tape systems been used successfully in many pipeline projects worldwide and are protecting more than 100m m2 of pipelines. The Densolen AS39P/ R20HT system is a two-tape coating solution comprising a self-amalgamating inner wrap applied over a layer of Densolen primer. Denso says it is capable of continuous operating temperatures of up to 50˚C and carries a C-50 stress class rating. The system comprises two layers of inner
28 PIPELINE COATING | May 2014
wrap tapes and two layers of outer wrap tapes, which results in a total protective layer thickness of 2.6mm. IOCL is India’s largest
company reporting total revenues of more than INR4,700bn (around €58bn) for the 2012/13 financial year. It is the highest ranked Indian company in the Fortune Global 500 listing, ranked in 88th position (just ahead of Procter & Gamble). IOCL’s 11,214km of pipelines carries more than 200,000 tonnes of oil and 10m metric standard cubic metres of gas each day. The company has 14 new pipeline projects under development represent- ing a total investment value of INR6.7bn ($830m). Altogether, these projects will expand its transport capacity by a further 16m tonnes a year.
Planned projects include the 700km Paradip-Haldia- Budge Budge-Kalyani-Dur- gapur and 400km Ennore- Trichy-Pondicherry LPG pipelines, the 295km Sangan- er-Bijwasan naptha pipeline, and the 120km Cauvery Basin Refinery to Trichy pipeline. Germany-based Denso has been manufacturing corrosion prevention and sealing technology products since 1922. Since the introduction of its first passive corrosion prevention for pipelines – the petrolatum-based Denso-Tape – in 1927 the company has developed a wide product range including Densolid liquid coatings, Densit sealing tapes, Dekotec heat shrinkable sleeves and Densolen polyethylene/butyl tape systems. ❙
www.denso.de
Application of DENSOLEN AS39 P/ R20HT at IOCL in India
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