ISO 9854-1:2023

Overview

ISO 9854-1:2023 specifies a general Charpy impact test method for thermoplastics pipes for the transport of fluids. It defines two complementary procedures:

• Method A (unnotched) for unnotched specimens cut from pipes.
• Method B (notched) for specimens into which a notch has been machined.

This part gives the general test method, required apparatus, specimen preparation, conditioning, test procedure and reporting. It is intended for materials testing, scientific research or situations where the reference pipe impact method cannot be used; it is not the primary reference test for pipe impact strength (see ISO 3127).

Keywords: ISO 9854-1:2023, Charpy impact, thermoplastics pipes, impact testing, pendulum impact-testing machine.

Key Topics and Requirements

• Scope: Applies to unnotched and notched Charpy specimens cut from thermoplastic pipes; choice of Method A or B is determined by product standards.
• Apparatus: Pendulum impact-testing machine compliant with ISO 13802; optional temperature control for the pendulum.
  • Method A: impact velocity 3.8 m/s; pendulums with maximum energies of 15 J and 50 J, tapered tip 30° ±1°, tip radius 2.0 mm ±0.5 mm.
  • Method B: impact velocity 2.9 m/s; absorbed energy must be 10–80% of available energy; use highest-energy suitable pendulum.
• Specimen preparation: Follow ISO 2818; surfaces contacting anvils/pendulum must be smooth and burr-free; no chamfering.
• Measurements & accuracy: Micrometres/gauges accurate to 0.02 mm; notch tip measurement requires specialized spindle profile. Temperature measuring accuracy ±0.5 °C.
• Test temperatures: Tests can be carried out at −20 °C, 0 °C or 23 °C, depending on material/size and ISO 9854-2 parameters.
• Applicability: Suitable for isolated batches or continuous production; data comparability depends on specimen dimensions.

Applications and Users

• Manufacturers of thermoplastic piping systems for quality control and production monitoring.
• Independent testing laboratories and certification bodies performing Charpy impact property assessments.
• R&D and materials scientists studying fracture behaviour of thermoplastics.
• Standards committees and product designers referencing appropriate method (A or B) in product standards. Practical uses include comparative material screening, production batch checks, and failure analysis when ISO 3127 testing is not feasible.

Related Standards

• ISO 9854-2 - provides specific test parameters for various pipe materials (complements this document).
• ISO 3127 - reference method for impact strength of pipes (falling mass).
• ISO 13802 - verification of pendulum impact-testing machines.
• ISO 2818 - specimen preparation by machining.

This summary helps engineers, lab managers and procurement specialists locate and apply ISO 9854-1:2023 for Charpy impact testing of thermoplastic pipes.