EN ISO 580:2005

• Abstract:

  ISO 580:2005 specifies two methods for assessing the effects of heating on injection-moulded thermoplastics pipe fittings -- method A, using an air oven, and method B, using a liquid bath. In case of disagreement, method A is the reference method. ISO 580:2005 is applicable to cement-welded fittings as well as to flanged fittings and fittings incorporating elastomeric seals and to fittings consisting of the assembly of several moulded parts (e.g. union connectors). It is applicable to both pressure and non-pressure fittings.

• Status: Published
• Publication Date: 14-Feb-2005
• ICS: 23.040.45 - Plastics fittings
• Technical Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Drafting Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 15-Oct-2008
• Completion Date: 15-Oct-2008
• Directive: Not Harmonized93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: SIST EN ISO 580:2005 - Plastics piping and ducting systems - Injection-moulded thermoplastics fittings - Methods for visually assessing the effects of heating (ISO 580:2005)

• Replaces: EN 763:1994 - Plastics piping and ducting systems - Injection-moulded thermoplastics fittings - Test method for visually assessing effects of heating
• Effective Date: 22-Dec-2008
• Referred By: EN 50626-2:2023 - Conduit systems buried underground for the protection and management of insulated electrical cables or communication cables - Part 2: Polyethylene (PE), Polypropylene (PP) or Unplasticized poly(vinyl chloride) (PVC-U) conduit systems - Requirements for solid wall conduits, fittings and the system used in special applications
• Effective Date: 09-Feb-2026
• Referred By: EN 1852-1:2018+A1:2022 - Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene (PP) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 13476-2:2018+A1:2020 - Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specifications for pipes and fittings with smooth internal and external surface and the system, Type A
• Effective Date: 28-Jan-2026
• Referred By: EN 1401-1:2019 - Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 1401-1:2009 - Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 17670-2:2023 - Plastics piping systems for non-pressure underground conveyance of surface water - Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specification for road gullies
• Effective Date: 28-Jan-2026
• Referred By: EN 14758-1:2023 - Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene with mineral modifiers (PP-MD) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 1852-1:2018 - Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene (PP) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 1451-1:2017 - Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Polypropylene (PP) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 14758-1:2012 - Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene with mineral modifiers (PP-MD) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Jan-2026
• Referred By: EN 13476-2:2007 - Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specifications for pipes and fittings with smooth internal and external surface and the system, Type A
• Effective Date: 28-Jan-2026
• Referred By: EN 13476-3:2025 - Plastics piping systems for non-pressure underground drains and sewers - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 3: Specifications for pipes and fittings with smooth internal and profiled external surface and the system, Type B
• Effective Date: 28-Jan-2026
• Referred By: EN 13476-1:2025 - Plastics piping systems for non-pressure underground drains and sewers - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 1: General requirements and performance characteristics
• Effective Date: 28-Jan-2026
• Referred By: EN 13476-3:2018+A1:2020 - Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 3: Specifications for pipes and fittings with smooth internal and profiled external surface and the system, Type B
• Effective Date: 28-Jan-2026

Overview

EN ISO 580:2005 specifies standardized test methods for visually assessing the effects of heating on injection-moulded thermoplastics fittings used in plastics piping and ducting systems. Published jointly by CEN and ISO, this standard strengthens quality assurance for both pressure and non-pressure thermoplastics fittings, including cement-welded, flanged, and elastomer-sealed components, as well as fittings composed of multiple moulded parts. The standard outlines two main testing approaches to identify heat-induced physical changes, helping to ensure the long-term reliability of plastic piping systems in various applications.

Key Topics

• Assessment Methods:
  • Method A: Air Oven - Fittings are exposed to elevated temperatures in an air-circulating oven for a specified period based on wall thickness and material.
  • Method B: Liquid Bath - Fittings are placed in a thermostatically controlled liquid bath at a specified temperature.
  • In case of discrepancies, Method A (air oven) is considered the reference approach.
• Visual Inspection:
  • Detection and evaluation of cracks, blisters, delaminations, and fusion line openings.
  • Measurements are expressed as a percentage of the wall thickness.
• Applicability:
  • Relevant for both pressure and non-pressure system fittings.
  • Applies to fittings with diverse construction methods, including those assembled from multiple parts.
  • Suitable for assessing a wide range of thermoplastics such as ABS, PE, PP, PVC-U, and PVC-C.
• Quality Indicators:
  • Identifies manufacturing defects like cold slugs, unfused areas, cavities, porosity, internal stresses, and contamination.
  • Ensures fittings maintain their structural integrity after exposure to elevated temperatures.
• Test Reporting:
  • Clear requirements for documenting the test parameters, observed changes, test liquids (for Method B), and any deviations from the procedure.

Applications

EN ISO 580:2005 provides practical guidance for manufacturers, quality control laboratories, and certification bodies involved in the production and assessment of thermoplastics piping fittings. The standard is applied in various contexts, such as:

• Manufacturing Quality Control: Ensures moulded thermoplastics fittings meet strict defect and durability criteria before distribution.
• Product Development: Assists in evaluating new fitting designs for heat resistance and structural integrity.
• Compliance and Certification: Used by third-party organizations for product validation, standardization, and regulatory requirements.
• Installation Assurance: Helps piping system installers and engineering consultants verify that fittings will perform reliably under expected service temperatures.
• Inspection and Maintenance: Supports ongoing system assessments, particularly for systems exposed to temperature fluctuations.

Adoption of EN ISO 580:2005 minimizes the risk of leakage, failure, and system downtime by detecting hidden defects and confirming heat resistance, thus safeguarding infrastructure investment and user safety in utility, industrial, and building piping installations.

Related Standards

For a comprehensive approach to plastics piping system quality and testing, the following international standards are closely associated or provide complementary procedures:

• EN 763: Previously superseded by EN ISO 580 and provided earlier test methods for assessing heat effects on plastics fittings.
• ISO 3126: Plastics piping systems - Measurement of dimensions.
• ISO 1167: Thermoplastics pipes, fittings, and assemblies - Determination of resistance to internal pressure.
• ISO 9080: Assessment of long-term hydrostatic strength of thermoplastics pipes.
• ISO/TR 4191: Thermoplastics valves - Resistance to internal pressure testing.

Implementing EN ISO 580:2005 within quality frameworks helps organizations meet regulatory compliance, enhance product credibility, and ensure the high performance of plastics piping and ducting systems worldwide.

SLOVENSKI STANDARD
01-julij-2005
1DGRPHãþD
SIST EN 763:1997
Cevni sistemi iz polimernih materialov - Brizgani plastomerni fitingi - Metode za
vizualno oceno vpliva segrevanja (ISO 580:2005)
Plastics piping and ducting systems - Injection-moulded thermoplastics fittings - Methods
for visually assessing the effects of heating (ISO 580:2005)
Kunststoff-Rohrleitungs- und Schutzrohrsysteme- Spritzguss-Formstücke aus
Thermoplasten - Verfahren für die visuelle Beurteilung der Einflüsse durch
Warmlagerung (ISO 580:2005)
Systemes de canalisations et de gaines en plastiques - Raccords thermoplastiques
moulés par injection - Méthodes d'essai pour estimer visuellement les effets de la
chaleur (ISO 580:2005)
Ta slovenski standard je istoveten z: EN ISO 580:2005
ICS:
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 580
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2005
ICS 23.040.45 Supersedes EN 763:1994
English version
Plastics piping and ducting systems - Injection-moulded
thermoplastics fittings - Methods for visually assessing the
effects of heating (ISO 580:2005)
Systèmes de canalisations et de gaines en plastiques - Kunststoff-Rohrleitungs- und Schutzrohrsysteme-
Raccords thermoplastiques moulés par injection - Spritzguss-Formstücke aus Thermoplasten - Verfahren für
Méthodes d'essai pour estimer visuellement les effets de la die visuelle Beurteilung der Einflüsse durch Warmlagerung
chaleur (ISO 580:2005) (ISO 580:2005)
This European Standard was approved by CEN on 21 January 2005.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 580:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 580:2005) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with Technical
Committee CEN/TC 155 "Plastics piping systems and ducting systems", the secretariat of which
is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by August 2005, and conflicting national
standards shall be withdrawn at the latest by August 2005.

This document supersedes EN 763:1994.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 580:2005 has been approved by CEN as EN ISO 580:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 580
Third edition
2005-02-15
Plastics piping and ducting systems —
Injection-moulded thermoplastics
fittings — Methods for visually assessing
the effects of heating
Systèmes de canalisations et de gaines en plastiques — Raccords
thermoplastiques moulés par injection — Méthodes d'essai pour
estimer visuellement les effets de la chaleur

Reference number
ISO 580:2005(E)
©
ISO 2005
ISO 580:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 580:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 580 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and
their accessories — Test methods and basic specifications.
This third edition cancels and replaces the second edition (ISO 580:1990), which has been technically revised.
ISO 580:2005(E)
Introduction
The test for determination of the resistance to heat according to the two test methods specified in this
International Standard is applicable for distinguishing between properly and improperly moulded
thermoplastics pipe fittings.
It can be used to
 determine whether cold slugs (pieces of material that enter the mould at a temperature significantly lower
than the rest of the mass) or unfused areas are present,
 reveal cavities and porosity,
 determine the amount of moulded-in stress produced by the moulding process,
 reveal contamination, and
 show the integrity of the fusion line.
A stress-free part will generally have better properties and higher strength than parts with a higher degree of
residual stress and will generally be less reactive when exposed to chemicals. By placing moulded fittings in a
heated medium (air or liquid) at elevated temperature for a period of time dependant on their wall thickness, it
is possible to detect internal stress.
Since the stresses start to be released as soon as the material passes to the rubbery state, it is only
necessary to maintain the moulded pieces at a higher temperature for a defined period of time.
NOTE Injection-moulded fittings can be made by a number of techniques, whereby the material is injected into the
mould cavity. These include single- or multi-point injection, diaphragm gating and ring gating. The technique used in the
manufacture of mouldings will affect the way in which they are assessed.
iv © ISO 2005 – All rights reserved

INTERNATIONAL STANDARD ISO 580:2005(E)

Plastics piping and ducting systems — Injection-moulded
thermoplastics fittings — Methods for visually assessing the
effects of heating
1 Scope
This International Standard specifies two methods for assessing the effects of heating on injection-moulded
thermoplastics pipe fittings — method A, using an air oven, and method B, using a liquid bath. In case of
disagreement, method A is the reference method.
This International Standard is applicable to cement-welded fittings as well as to flanged fi
...