SS-EN-489 District heating pipes - Preinsulated bonded pipe systems for direcly buried hot water networks - Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

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This European Standard specifies requirements for joints made under field conditions between adjacent preinsulated pipes and/or fittings in district heating networks. The specified general requirements are also valid for field-made T-branches, bends, reducers, caps, etc. This European Standard covers jointing of steel service pipes by means of fusion welding, the connecting of casing ends with joint casings and the thermal insulation with poured rigid PUR foam or prefabricated PUR-foam insulation. This European Standard specifies methods for type tests of complete joints and PUR-foam for joints under laboratory conditions. The requirements of this European Standard can also be applied to casing pipe weldings/connections of on site made fittings. The requirements of this European Standard aim to obtain a technical life of the joints of at least 30 years.

To find similar documents by classification:

23.040.01 (Pipeline components and pipelines in general)

23.040.07 (Pipelines and its parts for district heat)

23.040.10 (Iron and steel pipes Steel pipes and tubes for specific use, see 77.140.75)

23.040.20 (Plastics pipes)

23.040.45 (Plastics fittings)

23.040.60 (Flanges, couplings and joints)

23.040.99 (Other pipeline components)

27.010 (Energy and heat transfer engineering in general)

27.220 (Heat recovery. Thermal insulation This group includes standards for general use Thermal insulation of buildings, see 91.120.10)

91.140.10 (Central heating systems Including burners and boilers for central heating systems Heating appliances, see 97.100)

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Designation Name

SS-EN 489:2009

Revision Level




Publication Date

March 13, 2009



Page Count


International Equivalent

EN 489:2009(IDT)