ISO 10146:2019 PDF

Crosslinked polyethylene (PE-X) and crosslinked medium density polyethylene (PE-MDX) — Effect of time and temperature on expected strength

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Title (English):

ISO 10146:2019

Crosslinked polyethylene (PE-X) and crosslinked medium density polyethylene (PE-MDX) — Effect of time and temperature on expected strength

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: February 26, 2019
Edition:: ISO IS 10146 edition 2 version 1
ICS:: 23.040.20

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Description (English):

This document specifies the minimum values for expected strength as a function of time and temperature in the form of reference lines, for use in calculations on crosslinked polyethylene (PE-X) pipes and crosslinked medium density polyethylene (PE-MDX) pipes. NOTE 1 This document is applicable for pipes with the minimum level of crosslinking after production in accordance with Clause 4. NOTE 2 The density range for medium density polyethylene is 926 kg/m3 to 940 kg/m3 in accordance with ISO 17855-1:2014[2].

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 10146:2019

Abstract

Overview

ISO 10146:2019 defines how to determine the expected strength of pipes made from crosslinked polyethylene (PE‑X) and crosslinked medium density polyethylene (PE‑MDX) as a function of time and temperature. The standard supplies reference lines (mathematical equations, graphs and tables) giving minimum long‑term hydrostatic strength for use in design calculations and lifetime assessments of PE‑X and PE‑MDX piping systems. It applies to pipes meeting the minimum degree of crosslinking specified in Clause 4 and to PE‑MDX within the density range 926–940 kg/m3 (per ISO 17855‑1:2014).

Key topics and technical requirements

Reference lines and formulae: The standard provides analytical reference lines for temperatures between 20 °C and 95 °C and separate expressions for 110 °C. These describe log(time) as a function of temperature (K) and hoop stress (MPa), enabling interpolation and controlled extrapolation.
Degree of crosslinking: Minimum crosslinking after production is required and quantified by gel content (ISO 10147). Typical minimums: peroxide and UV processes ≥70%, silane ≥65%, electron beam ≥60%.
Extrapolation and activation energy: Temperature dependence is based on an Arrhenius approach with an activation energy of 110 kJ/mol. The standard lists extrapolation factors (k) to convert life at 110 °C to lower temperatures (e.g., k ≈ 4 at ≤95 °C, k ≈ 18 at ≤80 °C, k ≈ 50 at ≤70 °C, k ≈ 100 for

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Reference lines and formulae: The standard provides analytical reference lines for temperatures between 20 °C and 95 °C and separate expressions for 110 °C. These describe log(time) as a function of temperature (K) and hoop stress (MPa), enabling interpolation and controlled extrapolation.
Degree of crosslinking: Minimum crosslinking after production is required and quantified by gel content (ISO 10147). Typical minimums: peroxide and UV processes ≥70%, silane ≥65%, electron beam ≥60%.
Extrapolation and activation energy: Temperature dependence is based on an Arrhenius approach with an activation energy of 110 kJ/mol. The standard lists extrapolation factors (k) to convert life at 110 °C to lower temperatures (e.g., k ≈ 4 at ≤95 °C, k ≈ 18 at ≤80 °C, k ≈ 50 at ≤70 °C, k ≈ 100 for

ISO 10146:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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