AVKO

PRE-INSULATED PIPE SYSTEMS FOR DISTRICT HEATING NETWORKS


Quality control

In order to provide high and reliable quality for its production, in 1996 AVKO JSC was certified according the series of standards ISO 9000. This system spreads across all processes of our products life cycle. Quality control is integrated technological procedure and the intention is to be regulated entire processes, not just separate products.

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In our production and development of new products, we implement the basic European norms in this field:

- EN 253 – District heating pipes – Pre-insulated bonded pipe systems for directly buried hot water networks – Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene

- EN 448 – District heating pipes – Pre-insulated bonded pipe systems for directly buried hot water networks – Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

- EN 488 – District heating pipes – Pre-insulated bonded pipe systems for directly buried hot water networks – Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

- EN 489 – District heating pipes – Pre-insulated bonded pipe systems for directly buried hot water networks – Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing

of polyethylene

AVKO’s pre-insulated piping systems have been tested and found to conform to the base standards and have confirmed technical characteristics as a building material.

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Proof of our products’ quality is the Certificate issued by Fernwarme Forschungsinstitut in Hanover E.V. showing their full conformity to the norm regulating pre-insulated elbows and fittings, EN 448.

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Latest test carried out at the Science and Research Institute for Building Materials, Sofia, demonstrated excellent results for one crucial parameter for our products – heat conductivity coefficient λ. It was established that at  50оС that coefficient is 0,0265 W/mK.

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At the 56th International Technical Fair in Plovdiv, 2000, the pre-insulated products manufactured by AVKO jsc were awarded Gold medal, Gold Certificate and a Diploma.

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