ISO 19893:2011 PDF

Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test method for the resistance of mounted assemblies to temperature cycling

Название (английский):

ISO 19893:2011

Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test method for the resistance of mounted assemblies to temperature cycling

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 14 декабря 2011 г.
Издание:: ISO IS 19893 edition 1 version 1
ICS:: 23.040.20

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Описание (английский):

ISO 19893:2011 specifies a method for testing the resistance to temperature cycling of joints for piping systems with rigid or flexible thermoplastics pipes. It is applicable to thermoplastics piping systems intended to be used in hot and cold water pressure applications.

Технические детали

Технический комитет: 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 19893:2011

Abstract

Overview

ISO 19893:2011 specifies a standardized test method for the resistance of mounted assemblies to temperature cycling for thermoplastics piping systems used in hot and cold water pressure applications. The method evaluates the behaviour of joints, pipes and fittings (rigid or flexible) when subjected to alternating hot and cold water under pressure while parts of the assembly are held under tensile stress and/or flexural strain.

Keywords: ISO 19893:2011, temperature cycling test, thermoplastics pipes, joints and fittings, hot and cold water piping systems.

Key Topics and Requirements

Test principle: A pipe-and-fitting assembly is subjected to repeated cycles of hot and cold water while being monitored for leakage and deformation.
Test assembly configuration: Typical arrangement includes three branches:
- Branch A - prestressed (anchored) straight section;
- Branch B - free-to-move straight section;
- Branch C - bent section to impose flexural strain.
Preconditioning and prestress: Components are preconditioned per manufacturer recommendations; branch A is prestressed to a tensile stress defined by the reference product standard.
Equipment: Cold and hot water reservoirs, alternation equipment (to switch inlet temperature within 1 minute), balancing valves, pressure gauges, thermostats, supporting brackets and a tensioning device.
Control and acceptance criteria:
- Test parameters (temperatures, cycle durations, pressure, tensile stress, bending radius and total number of cycles) are defined by the reference product standard that invokes ISO 19893.
- Default settings (unless otherwise specified) for diameters <63 mm: 30-minute cycles (15 min cold / 15 min hot), total 5 000 cycles. For diameters >63 mm: 60-minute cycles, total 2 500 cycles.
- During the first five cycles, balancing valves and joints are adjusted so the temperature drop between inlet and outlet is

Overview

Keywords: ISO 19893:2011, temperature cycling test, thermoplastics pipes, joints and fittings, hot and cold water piping systems.

Key Topics and Requirements

Test principle: A pipe-and-fitting assembly is subjected to repeated cycles of hot and cold water while being monitored for leakage and deformation.
Test assembly configuration: Typical arrangement includes three branches:
- Branch A - prestressed (anchored) straight section;
- Branch B - free-to-move straight section;
- Branch C - bent section to impose flexural strain.
Preconditioning and prestress: Components are preconditioned per manufacturer recommendations; branch A is prestressed to a tensile stress defined by the reference product standard.
Equipment: Cold and hot water reservoirs, alternation equipment (to switch inlet temperature within 1 minute), balancing valves, pressure gauges, thermostats, supporting brackets and a tensioning device.
Control and acceptance criteria:
- Test parameters (temperatures, cycle durations, pressure, tensile stress, bending radius and total number of cycles) are defined by the reference product standard that invokes ISO 19893.
- Default settings (unless otherwise specified) for diameters <63 mm: 30-minute cycles (15 min cold / 15 min hot), total 5 000 cycles. For diameters >63 mm: 60-minute cycles, total 2 500 cycles.
- During the first five cycles, balancing valves and joints are adjusted so the temperature drop between inlet and outlet is

ISO 19893:2011 PDF

Технические детали

Abstract

Overview

Key Topics and Requirements

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Abstract

Overview

Key Topics and Requirements

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