ISO 13924-2000 PDF

Full title and description

ISO 13924:2000 — Plastics pipes and fittings — Bending-tensile cycle test for PE/metal transition fittings, PE tapping tees and PE branch saddles. This International Standard specifies a laboratory test method to assess the flexural fatigue (bending–tensile cycle) resistance of assembled fittings used on polyethylene (PE) piping systems.

Abstract

This standard specifies a method for testing the flexural fatigue resistance of piping assemblies under pressure. It is applicable to polyethylene (PE) tapping tees, PE/metal transition fittings and PE branch saddles intended for use with PE pipes having a nominal outside diameter de ≤ 63 mm. The test simulates combined bending and tensile stresses typical of buried piping networks at ambient temperature and is accelerated by magnifying displacements observed in practice.

General information

• Status: Published (International Standard — confirmed in review cycles).
• Publication date: March 2000 (Edition 1, 2000-03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.040.45 (Plastics fittings).
• Edition / version: Edition 1 (2000); standard was reviewed and confirmed in 2021.
• Number of pages: 5.

Scope

Provides a standardized bending–tensile cycle (flexural fatigue) test procedure to evaluate the durability of assemblies comprising PE tapping tees, PE/metal transition fittings and PE branch saddles when installed on PE pipes (nominal outside diameter up to 63 mm). The scope covers simulation of field stresses for buried networks (combined bending and tensile loading) at ambient temperature and uses accelerated displacement magnification to reproduce long-term effects in a shortened test period.

Key topics and requirements

• Definition of test specimen types: PE tapping tees, PE/metal transition fittings and PE branch saddles for PE pipe systems (de ≤ 63 mm).
• Description of test apparatus and cycling protocol to apply combined bending and tensile loading under internal pressure.
• Procedures for accelerating fatigue by magnifying displacements to simulate long-term in‑service stresses.
• Criteria for evaluating failure or degradation of the assembly (performance/failure observation during or after cycling).
• Applicability limits and test conditions (ambient temperature, pipe size limitations).

Typical use and users

Used by standards laboratories, manufacturers of polyethylene fittings and transition fittings, quality and R&D departments, test houses, certification bodies and engineers responsible for water/gas distribution and buried PE piping systems. It supports product verification, type-testing, product development and conformity assessment for fittings expected to experience combined bending and tensile loading in service.

Related standards

ISO 13924 sits within the ISO/TC 138/SC 5 set of test methods for plastics pipes and fittings. Closely related standards include other PE tapping-tee and saddle test methods (for example ISO 13957 for impact resistance, ISO 13955 for electrofusion assembly decohesion tests) and additional thermoplastics fittings test standards published under ISO/TC 138/SC 5. These companion standards address complementary mechanical tests and joint/fitting evaluations used together with ISO 13924 for comprehensive assessment of PE fittings.

Keywords

PE tapping tee, branch saddle, PE/metal transition fitting, bending–tensile cycle test, flexural fatigue, polyethylene fittings, buried piping, test method, ISO 13924.

FAQ

Q: What is this standard?

A: ISO 13924:2000 is an ISO International Standard that specifies a bending–tensile cycle (flexural fatigue) test method for polyethylene (PE) tapping tees, PE/metal transition fittings and PE branch saddles used on PE pipes.

Q: What does it cover?

A: It covers the laboratory procedure to simulate combined bending and tensile stresses (as found in buried networks) on fitting assemblies under internal pressure, using accelerated displacement magnification to reproduce long-term fatigue effects. Applicable to assemblies for PE pipes with nominal outside diameter up to 63 mm.

Q: Who typically uses it?

A: Manufacturers, testing and certification labs, R&D and quality personnel, and engineering teams responsible for design, selection and qualification of PE fittings in water, gas and other buried piping applications.

Q: Is it current or superseded?

A: The edition is ISO 13924:2000 (Edition 1). The ISO record shows the publication in March 2000 and indicates the document was reviewed and confirmed (most recently confirmed in 2021), so this version remains current as of the last formal ISO review. Users should check national adoption status or ISO store notices for any later revisions.

Q: Is it part of a series?

A: Yes — it is part of the ISO/TC 138 family of standards for plastics pipes, fittings and test methods (other related test-method standards for PE fittings and joints include ISO 13957, ISO 13955 and related ISO/TC 138/SC 5 publications). These standards are commonly used together for comprehensive evaluation of PE piping components.

Q: What are the key keywords?

A: Keywords include bending–tensile cycle, flexural fatigue, PE tapping tee, branch saddle, PE/metal transition fitting, test method, buried piping, polyethylene fittings, ISO 13924.