ISO 11673:2005 PDF

Name: ISO 11673:2005 — Unplasticized poly(vinyl chloride) (PVC-U) pressure pipes — Determination of the fracture toughness properties
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Unplasticized poly(vinyl chloride) (PVC-U) pressure pipes — Determination of the fracture toughness properties

Название (английский):

ISO 11673:2005

Unplasticized poly(vinyl chloride) (PVC-U) pressure pipes — Determination of the fracture toughness properties

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 11 апреля 2005 г.
Издание:: ISO IS 11673 edition 1 version 1
ICS:: 23.040.20

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Описание (английский):

ISO 11673:2005 specifies a method for determining the minimum fracture toughness, after a specified loading time, of unplasticized poly(vinyl chloride) (PVC-U) pressure pipes. It also makes provision for measuring alternative levels of fracture toughness.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 11673:2005 - Unplasticized poly(vinyl chloride) (PVC-U) pressure pipes - Determination of the fracture toughness properties - specifies a laboratory test method to determine the minimum fracture toughness of PVC‑U pressure pipes. The method locates the pipe circumference region most susceptible to solvent attack (using dichloromethane), extracts a C‑ring test piece from that location, introduces a controlled notch and subjects the C‑ring to a sustained flexural stress to measure fracture behavior after a specified loading time. The standard also provides procedures for measuring alternative fracture toughness levels.

Key topics and technical requirements

Preliminary dichloromethane (DCM) immersion test to identify the point of minimum gelation/maximum attack around the pipe circumference (tests at 15 °C or 20 °C with defined immersion times).

Use of a C‑ring (ring section ≈ 30 ± 3 mm wide) cut perpendicular to the pipe axis for fracture testing.

Notch preparation requirements: included angle ~45° (±2°), notch-tip radius ≤ 0.025 mm, uniform notch depth and tight thickness tolerances.

Test apparatus and setup: rigid support clamps matching pipe radius, loading device to apply and maintain a controlled bending moment, timing accuracy and mass measurement requirements.

Measurement and expression of results in terms of stress intensity factor (K), critical stress intensity factor (Kc) and plain-strain fracture toughness (KIC) where applicable. The standard references the geometric correction factor, yield stress and notch depth in K calculations.

Reporting requirements and annexed mathematical calculations, conditioning and yield strength determination guidance.

Practical applications

Quality control and production acceptance testing for PVC‑U pressure pipes used in water, drainage and fluid transport systems.

Verification of material resistance to brittle fracture originating from small flaws or localized gelation variations.

Design validation and safety assessment where fracture toughness is a requirement in product standards or project specifications.

Failure analysis and materials comparison during R&D or when selecting PVC‑U formulations and processing conditions.

Who should use this standard

Pipe manufacturers and materials engineers developing or qualifying PVC‑U pressure pipe products.

Independent testing laboratories performing mechanical and fracture toughness testing.

Product standards committees, specifiers and regulatory bodies that reference fracture toughness criteria for compliance.

Quality assurance teams responsible for batch testing and certification.

Related standards

ISO 9852 - PVC‑U pipes - Dichloromethane resistance test (DCMT)

ISO 6259‑2 - Thermoplastics pipes - Tensile properties - Part 2: PVC‑U and related materials

Keywords: ISO 11673:2005, PVC‑U fracture toughness, C‑ring test, dichloromethane, pressure pipes, stress intensity factor, fracture toughness test.

ISO 11673:2005 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Технические детали

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