DIN: Plastics piping systems for floor heating and radiator connecting systems

Overworked certifications scheme for plastics piping systems for warm water surface heating systems and radiator connecting systems.

Copper or steel pipes have been used predominantly in the past in heating technology. The sector has since learnt to appreciate the benefits of plastic piping systems. Light weight and high flexibility ensure simple and fast laying.

This is why plastic pipes are used mainly when laying underfloor heating in Germany. There are also a variety of systems available for the application as radiator connecting pipes. The following materials are used:

  • PE-X         Crosslinked polyethylene (PE-Xa, PE-Xb, PE-Xc)
  • PP             Polypropylene
  • PB             Polybutylene
  • PE-RT      Polyethylene with higher temperature resistance
  • PVC-C      Post chlorinated polyvinyl chloride
  • PE-MDX   Medium density crosslinked polyethylene
  • MVR         Multilayer composite pipes

As oxygen entering the heating system can result in problems with corrosion to the iron parts (heating boiler, radiators) and therefore has a significant impact upon the life of the system, all the plastic pipe systems have to be oxygen-tight to DIN 4726.

With the accredited and independent certification mark “DIN-Geprüft”, DIN CERTCO enables the manufacturer to convince their customers of the quality of their products and provide the customer with assistance in his purchase decision; as our mark stands for trust!

There is a half-yearly inspection (standard inspection) of products and of the quality assurance system (QA system).

The “DIN-Geprüft” mark is only granted to those pipe systems that are able to prove that they comply with the standards by completing a successful test in a test laboratory recognized by DIN CERTCO and a subsequent independent assessment. After a positive assessment, DIN CERTCO issues a certificate that is valid indefinitely. The registration number that clearly identifies the certificate is made up as follows: 3Vxxx “type of plastic”.

Basis of Testing: The DIN CERTCO certification scheme “DIN-Geprüft plastic pipe systems for warm water underfloor heating and radiator connection” is the basis on which the mark is awarded. The scheme is based on a number of standards.

List of valid standards, on which the DIN CERTCO certification scheme “DIN-Geprüft plastic pipe systems for warm water underfloor heating and radiator connection” is based.

KWD-SHK, 01.07.2011. The DIN CERTCO certification scheme “DIN-Geprüft plastic pipe systems for warm water underfloor heating and radiator connection” is the basis on which the mark is awarded.

The scheme is based on the following standards:

  • DIN 4726 “Warm water underfloor heating and radiator connections – plastic pipe systems”
  • DIN EN 15015 “Plastics piping systems – Hot and cold water piping components – Requirements and test/assessment methods for pipes and fittings”
  • ISO 10508 “Plastics piping systems for hot and cold water installations — Guidance for classification and design”
  • DIN EN ISO 9001 “Quality management systems – Requirements “

As well as on the following material-specific standards:

PP pipes

  • DIN EN ISO 15874-1 “Plastics piping systems for hot and cold water installations – Polypropylene (PP) – Part 1: General”
  • DIN EN ISO 15874-2 “Plastics piping systems for hot and cold water installations – Polypropylene (PP) – Part 2: Pipes”
  • DIN EN ISO 15874-3 “Plastics piping systems for hot and cold water installations – Polypropylene (PP) – Part 3: Fittings”
  • DIN EN ISO 15875-5 “Plastics piping systems for hot and cold water installations – Polypropylene (PP) – Part 5: Fitness for purpose of the system”

PE-X pipes

  • DIN EN ISO 15875-1 “Plastics piping systems for hot and cold water installations – Crosslinked polyethylene (PE-X) – Part 1: General”
  • DIN EN ISO 15875-2 “Plastics piping systems for hot and cold water installations – Crosslinked polyethylene (PE-X) – Part 2: Pipes”
  • DIN EN ISO 15875-3 “Plastics piping systems for hot and cold water installations – Crosslinked polyethylene (PE-X) – Part 3: Fittings”
  • DIN EN ISO 15875-5 “Plastics piping systems for hot and cold water installations – Crosslinked polyethylene (PE-X) – Part 5: Fitness for purpose of the system”

PB pipes

  • DIN EN ISO 15876-1 Plastics piping systems for hot and cold water installations – Polybutylene (PB) – Part 1: General”
  • DIN EN ISO 15876-2 “Plastics piping systems for hot and cold water installations – Polybutylene (PB) – Part 2: Pipes”
  • DIN EN ISO 15876-3 “Plastics piping systems for hot and cold water installations – Polybutylene (PB) – Part 3: Fittings”
  • DIN EN ISO 15876-5 “Plastics piping systems for hot and cold water installations – Polybutylene (PB) – Part 5: Fitness for purpose of the system”

PE-RT pipes

  • DIN 16833 “Polyethylene pipes of raised temperature resistance (PE-RT) – General quality requirements, testing”
  • DIN 4721 “Plastic piping systems for warm water floor heating systems and radiator connecting – Polyethylene of raised temperature resistance (PE-RT)”
  • DIN EN ISO 22391 “Plastics piping systems for hot and cold water installations – Polyethylene with higher temperature resistance (PE-RT)” part 1, 2, 3 and 5

PE-MDX pipes

  • DIN 16894 “Pipes of crosslinked medium density polyethylene (PE-MDX) – General quality requirements and testing”
  • DIN 16895 ” Pipes of crosslinked medium density polyethylene (PE-MDX) – Dimensions”
  • DIN 4724 “Plastic piping systems for warm water floor heating systems and radiator pipe connecting – Crosslinked polyethylene of medium density (PE-MDX)”

Multilayer composite pipes

  • DIN EN ISO 21003 “Multilayer piping systems for hot and cold water installations inside buildings”
  • DIN ISO/TS 21003-7 “Multilayer piping systems for hot and cold water installations inside buildings – Part 7: Guidance for the assessment of conformity”
  • DVGW W 542 “Multilayer pipes for drinking water installation systems – Requirements and testing”

These test standards define the requirements and test procedures for pipes, fittings (joints) and systems in terms of dimensions, bend radius and oxygen-tightness:

  • Dimensions
  • Homogeneity
  • Bend radii
  • Oxygen tightness
  • Compatibility with heating water additives
  • Surface quality
  • Strength properties
  • Level of crosslinkage
  • Longitudinal shrinkage
  • Behaviour under changes in temperature
  • Behaviour under changes in pressure
  • Identification
  • Completeness of the information and directions for use

Following quality criteria are also the object of the test:

  • Homogeneity (flaws)
  • Bend radius
  • Oxygen-tightness
  • Compatibility with heating water additives
  • Completeness of the information and directions for use
  • Inspection of the production documentation

The “DIN-Geprüft” mark is only granted to those pipe systems that are able to prove that they comply with the standards by completing a successful test in a test laboratory recognized by DIN CERTCO and a subsequent independent assessment.

source: DIN CERTCO, Berlin, Germany, info@dincertco.de, www.dincertco.de.

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