BS 2782-1.135(1993) : 1993 AMD 10349

Superseded

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METHODS OF TEST PLASTICS - THERMAL PROPERTIES - DETERMINATION OF THE TIME-TEMPERATURE LIMITS AFTER PROLONGED EXPOSURE TO HEAT

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Superseded date: 15-05-1999

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Published date: 23-11-2012

Publisher: British Standards Institution

Table of Contents - (Show below) - (Hide below)

National foreword
Committees responsible
Introduction
Method
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Choice of test
6 Choice of end-point
7 Test specimens
8 Exposure temperature
9 Ageing ovens
10 Procedure
11 Evaluation of results
12 Determination of the relative temperature index
13 Test report
Annexes
A (normative) Calculation of the regression line
B (normative) Correlation coefficient
C (informative) Recommended test schedule for primary
     properties
Tables
A.1 Commonly used test temperatures, in degrees
     Celsius, corresponding values in kelvins with their
     reciprocal and reciprocal squared values
A.2 Sample calculation
Figures
1 Determination of the time to reach the end-point at
     each temperature - property variation
2 Thermal endurance graph - temperature index -
     halving interval
3 Thermal endurance graph - relative temperature
     index - halving interval
A.1 Plot of regression line based on sample calculation

Abstract - (Show below) - (Hide below)

Specifies the principles and procedures for evaluating the thermal endurance properties of plastics exposed to elevated temperature for long periods. Coverage includes definitions, exposure temperature, ageing ovens, choice of end-point, and determination of the relative temperature index. Also gives detailed tables, annexes and diagrams. BS AMD 10349 RENUMBERS THIS STD

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Committee	PRM/21
Development Note	Renumbered and superseded by BS EN ISO 2578. Supersedes 90/38737 DC. (10/2005)
Document Type	Standard
ISBN
Pages
Published
Publisher	British Standards Institution
Status	Superseded
Superseded By	BS EN ISO 2578:1999

International Equivalents – Equivalent Standard(s) & Relationship - (Show below) - (Hide below)

Equivalent Standard(s)	Relationship
ISO 2578:1993	Identical

Standards Referenced By This Book - (Show below) - (Hide below)

BS 7825-3.8:1998	Calibration of rubber and plastics test equipment. Calibration schedules Degradation and environmental properties

Standards Referencing This Book - (Show below) - (Hide below)

IEC 60216-4-1:2006	Electrical insulating materials - Thermal endurance properties - Part 4-1: Ageing ovens - Single-chamber ovens
IEC 60216-2:2005	Electrical insulating materials - Thermal endurance properties - Part 2: Determination of thermal endurance properties of electrical insulating materials - Choice of test criteria
ISO 291:2008	Plastics Standard atmospheres for conditioning and testing
IEC 60216-5:2008	Electrical insulating materials - Thermal endurance properties - Part 5: Determination of relative thermal endurance index (RTE) of an insulating material
IEC 60216-3-1:1990	Guide for the determination of thermal endurance properties of electrical insulating materials. Part 3: Instructions for calculating thermal endurance characteristics - Section 1: Calculations using mean values of normally distributed complete data
IEC 60216-1:2013	Electrical insulating materials - Thermal endurance properties - Part 1: Ageing procedures and evaluation of test results

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