ISO 10146-2019 PDF

Full title and description

ISO 10146:2019 — Crosslinked polyethylene (PE‑X) and crosslinked medium density polyethylene (PE‑MDX) — Effect of time and temperature on expected strength. This International Standard gives reference lines that specify minimum values for expected strength as a function of time and temperature, for use in strength calculations on PE‑X and PE‑MDX pipes.

Abstract

This document specifies minimum expected strength values (presented as reference lines and tabulated values) expressed as a function of temperature and time for crosslinked polyethylene pipe materials (PE‑X) and crosslinked medium density polyethylene (PE‑MDX). It is intended to be used in long‑term strength calculations and design assessments for piping systems made from these materials. Notes in the standard define applicability limits (minimum degree of crosslinking) and the density range for PE‑MDX (926–940 kg/m³ referenced to ISO 17855‑1:2014).

General information

• Status: Published (current edition; under review for revision).
• Publication date: 2019 (Edition 2 — published early 2019; ISO lists the edition as 2019‑03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.040.20 (Plastics pipes).
• Edition / version: Edition 2 (2019).
• Number of pages: 11 pages (document length per ISO catalogue).

Scope

ISO 10146:2019 applies to crosslinked polyethylene (PE‑X) and to crosslinked medium density polyethylene (PE‑MDX) used for pipes. It provides minimum expected strength values as a function of time and temperature in the form of reference lines, tabulated values and guidance for extrapolation limits and graphical representation. The standard is applicable where pipes meet the minimum degree of crosslinking specified in the document and references ISO 17855‑1:2014 for PE‑MDX density classification.

Key topics and requirements

• Definition of expected (survivability) strength reference lines for PE‑X and PE‑MDX as a function of time and temperature.
• Limits and rules for extrapolation of reference lines beyond measured data.
• Tabulated values and graphical representation for design calculations.
• Minimum degree of crosslinking required for the document to apply (specified in Clause 4).
• Reference to density classification for PE‑MDX (926–940 kg/m³) via ISO 17855‑1:2014.
• Annex with normative information to demonstrate conformance of pipes to the reference lines.

Typical use and users

Primary users are standards committees, material and piping system designers, manufacturers of PE‑X and PE‑MDX pipes, test laboratories and regulatory authorities involved in the approval and long‑term performance assessment of plastic piping systems for fluid transport. The standard is used in design calculations, lifetime predictions, qualification testing and to demonstrate conformity of pipe types to long‑term strength expectations.

Related standards

Key related documents include ISO 17855‑1:2014 (Polyethylene designation system and basis for specifications — referenced for density ranges), the withdrawn ISO 10146:1997 (superseded by the 2019 edition), and the draft ISO/DIS 10146 (under development as a future revision). Users should consult national bodies for harmonized versions (e.g., BS ISO editions) where applicable.

Keywords

PE‑X, PE‑MDX, crosslinked polyethylene, expected strength, long‑term strength, reference lines, temperature dependence, time‑temperature superposition, pipe design, ISO 10146.

FAQ

Q: What is this standard?

A: ISO 10146:2019 is an International Standard that specifies minimum expected strength values for crosslinked polyethylene pipe materials (PE‑X and PE‑MDX) as a function of time and temperature, presented as reference lines and tabulated data for use in design and assessment.

Q: What does it cover?

A: It covers methods to express expected long‑term strength versus time and temperature, graphical and tabulated reference lines for use in calculations, limits for extrapolation, applicability conditions (including minimum crosslinking), and normative annex material for demonstrating conformance of pipes to the reference lines.

Q: Who typically uses it?

A: Pipe manufacturers, materials engineers, test laboratories, designers of piping systems, certification bodies and standards committees. It is used to support lifetime and safety assessments of PE‑X and PE‑MDX piping.

Q: Is it current or superseded?

A: ISO 10146:2019 is the current published edition (Edition 2, 2019) and replaced ISO 10146:1997. ISO indicates the document is subject to periodic review and a draft revision (ISO/DIS 10146) has been developed; users should check with their national standards body for the latest status.

Q: Is it part of a series?

A: It sits within the work of ISO/TC 138 (Plastics pipes, fittings and valves for the transport of fluids), and is linked by references to other polyethylene and plastics material standards (for example ISO 17855‑1:2014 for polyethylene designation and density classes). It is not a multi‑part ISO series by itself but is related to other ISO plastics/pipe standards.

Q: What are the key keywords?

A: PE‑X, PE‑MDX, crosslinked polyethylene, expected strength, time‑temperature, reference lines, pipe strength, long‑term performance.