ISO 2507-1:1995 PDF

Thermoplastics pipes and fittings — Vicat softening temperature — Part 1: General test method

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Title (English):

ISO 2507-1:1995

Thermoplastics pipes and fittings — Vicat softening temperature — Part 1: General test method

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: February 2, 1995
Edition:: ISO IS 2507 edition 1 version 1
ICS:: 23.040.20

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Description (English):

The method specified is based on determining the temperature at which a standard indenter, under a force of 50 N ± 1 N, penetrates 1 mm into the surface of a test piece cut from the wall of a pipe or fitting while the temperature is raised at a constant rate. Is applicable only to thermoplastics materials for which it is possible to measure the temperature at which the rate of softening becomes rapid. Is based on ISO 306:1994 which, however, applies to materials in the form of sheets.

Technical details

Technical committee: ISO/TC 138/SC 5 - General properties of pipes, fittings and valves of plastic materials and their accessories -- Test methods and basic specifications
SKU: ISO 2507-1:1995

Abstract

Overview

ISO 2507-1:1995 specifies a general test method for determining the Vicat softening temperature (VST) of thermoplastics pipes and fittings. It adapts method B of ISO 306 for components in tubular form rather than sheets, defining how to measure the temperature at which a standard indenter under a force of 50 N ± 1 N penetrates 1 mm into a test piece while temperature increases at a controlled rate. The standard applies only to thermoplastic materials for which a rapid softening point can be observed and is not suitable for crystalline or semi‑crystalline polymers.

Key Topics and Requirements

Principle: Measure the temperature at which the indenter reaches 1.00 mm ± 0.01 mm penetration; this temperature is reported as the VST in °C.
Load and indenter: Standard indenter (cylindrical cross‑section ≈ 1 mm²) with total thrust 50 N ± 1 N.
Heating rate: Temperature rise in the heating medium controlled at 50 °C/h ± 5 °C/h; uniformity checked at 6‑minute intervals.
Apparatus: Rigid frame and rod, load‑carrying plate, micrometer dial gauge (0.01 mm resolution), immersion heating bath or air circulation oven, thermometer (±0.5 °C accuracy).
Test piece preparation:
- Segments of pipe/fitting rings with width 10–20 mm and length ≈ 50 mm (or specified socket lengths for fittings).
- Wall thickness >6 mm: machine outer surface to 4 mm; 2.4–6 mm: test as is;

Related standards

Mentioned in the description and other ISO standards

Overview

Key Topics and Requirements

Principle: Measure the temperature at which the indenter reaches 1.00 mm ± 0.01 mm penetration; this temperature is reported as the VST in °C.
Load and indenter: Standard indenter (cylindrical cross‑section ≈ 1 mm²) with total thrust 50 N ± 1 N.
Heating rate: Temperature rise in the heating medium controlled at 50 °C/h ± 5 °C/h; uniformity checked at 6‑minute intervals.
Apparatus: Rigid frame and rod, load‑carrying plate, micrometer dial gauge (0.01 mm resolution), immersion heating bath or air circulation oven, thermometer (±0.5 °C accuracy).
Test piece preparation:
- Segments of pipe/fitting rings with width 10–20 mm and length ≈ 50 mm (or specified socket lengths for fittings).
- Wall thickness >6 mm: machine outer surface to 4 mm; 2.4–6 mm: test as is;

ISO 2507-1:1995 PDF

Technical details

Abstract

Overview

Key Topics and Requirements

Related standards

Abstract

Overview

Key Topics and Requirements

Related standards

Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST) (ISO 306:2022)

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