SR EN 448:2020

District heating pipes - Bonded single pipe systems for directly buried hot water networks - Factory made fitting assemblies of steel service pipes, polyurethane thermal insulation and a casing of polyethylene

This document specifies requirements and test methods for factory made thermally insulated bonded fitting assemblies for hot water networks in accordance with EN 13941 1, comprising a steel service fitting, rigid polyurethane foam thermal insulation and a casing of polyethylene. The fitting assembly could also include the following additional elements: measuring wires, spacers and diffusion barriers. This document covers the following fitting assemblies: bend, tee, reducer, single use compensator and anchor. This document applies to fitting assemblies with a minimum design pressure of 1,6 MPa (overpressure).

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General information

Status : Withdrawn
Approval date : 2/28/2020
Withdrawal date : 9/30/2025
Number of pages : 38
ICS : 23.040.07 Pipelines and its parts for district heat,23.040.40 Metal fittings
Technical Committee : 302 - Space heating appliances, ventilation and room air conditioner

Relations with other standards:

Replaces SR EN 448:2016
Normative reference SR EN 253:2020
Normative reference SR EN 10204:2005
Normative reference SR EN 10216-2+A1:2020
Normative reference SR EN 10217-2:2019
Normative reference SR EN 10217-5:2019
Normative reference SR EN 10253-2:2021
Normative reference SR EN 12814-1:2001
Normative reference SR EN 13018:2016
Normative reference SR EN 13941-1+A1:2022
Normative reference SR EN 13941-2+A1:2022
Normative reference SR EN 14419:2020
Normative reference SR EN 14870-1:2011
Normative reference SR EN 17248:2020
Normative reference SR EN ISO 3452-1:2021
Normative reference SR EN ISO 5579:2014
Normative reference SR EN ISO 5817:2023
Normative reference SR EN ISO 8501-1:2007
Normative reference SR EN ISO 9606-1:2017
Normative reference SR EN ISO 9692-1:2014
Normative reference SR EN ISO 9934-1:2017
Normative reference SR EN ISO 10675-1:2022
Normative reference SR EN ISO 11666:2018
Normative reference SR EN ISO 14732:2014
Normative reference SR EN ISO 15607:2020
Normative reference SR EN ISO 16810:2014
Normative reference SR EN ISO 17636-1:2022
Normative reference SR EN ISO 17636-2:2023
Normative reference SR EN ISO 17637:2017
Normative reference SR EN ISO 17638:2017
Normative reference SR EN ISO 17640:2019
Normative reference SR EN ISO 23277:2015
Normative reference SR EN ISO 23278:2015
Replaced by SR EN 448:2025