ISO 6802:2018 PDF

Name: ISO 6802:2018 — Rubber or plastics hoses and hose assemblies — Hydraulic impulse test with flexing
SKU: ISO 6802:2018
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Rubber or plastics hoses and hose assemblies — Hydraulic impulse test with flexing

Название (английский):

ISO 6802:2018

Rubber or plastics hoses and hose assemblies — Hydraulic impulse test with flexing

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 12 сентября 2018 г.
Издание:: ISO IS 6802 edition 4 version 1
ICS:: 23.040.70

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Описание (английский):

This document describes hose impulse testing, with flexing, of rubber or plastics hydraulic hose assemblies at both high and low impulse pressures. The high-pressure testing is carried out at pressures greater than 3 MPa and the low-pressure testing at pressures from 1,5 MPa to 3 MPa. The test procedure is applicable to hydraulic hose assemblies that are subject to pulsating pressures in service which are included in the product requirements. NOTE Impulse test procedures without flexing can be found in ISO 6803.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 6802:2018 - "Rubber or plastics hoses and hose assemblies - Hydraulic impulse test with flexing" specifies a standardized method for impulse testing hydraulic rubber or plastic hose assemblies while subjecting them to flexing motion. The procedure covers both high-pressure (> 3 MPa) and low-pressure (1.5 MPa to 3 MPa) impulse regimes and is intended for hose assemblies that experience pulsating pressures and movement in service. An optional cool-down leakage test is included (Annex A). Note: impulse tests without flexing are covered by ISO 6803.

Key topics and technical requirements

Test scope: Applies to complete hose assemblies with fittings; typically four unaged samples unless otherwise specified.

Pressure ranges: High-pressure > 3 MPa; low-pressure 1.5–3 MPa.

Flexing methods: Two apparatus layouts - a revolving manifold (Method 1) or a horizontally sliding manifold (Method 2). The movable manifold remains parallel to the stationary manifold.

Flex geometry:

Distance from stationary centreline: l = 1.75·r + d_ext (±2 mm)
Free hose length between couplings: L = 4.14·r + 3.57·d_ext (±15 mm)
r = minimum bend radius; d_ext = external hose diameter

Cycle relationship: Movable manifold cycles per minute = 34–38% of impulse cycles per minute (flex cycles proportional to impulse cycles).

Test fluid: Recommend kinematic viscosity ISO VG 32–100 (32–100 mm²/s at 40 °C, per ISO 3448). Other fluids may be agreed between manufacturer and customer.

Failure and leakage: Leakage less than Class 4 (ISO/TR 11340) is not a failure. Failures near fittings (within 25 mm) are recorded as fitting failures.

Optional cool-down leakage test: Cool to ~30 °C (±10 °C) at 40% ±10% and 90% ±10% of cycles, then resume and observe leakage for 1 000 cycles.

Reporting: Test report must record test method, temperature, pressure, fluid, impulse rate, flex frequency, cycles to failure or completion, failure mode/position, fittings details, and whether cool-down test was used.

Applications and users

Hydraulic hose and hose assembly manufacturers - design verification and product qualification.

Test laboratories and third‑party certification bodies - compliance testing and quality assurance.

OEMs and system integrators - selection and validation of hoses used in mobile and industrial hydraulic systems subject to pulsation and movement.

Maintenance and reliability engineers - failure analysis, lifecycle expectations, and procurement specifications.

Related standards

ISO 6803 - Hydraulic-pressure impulse test without flexing

ISO/TR 11340 - External leakage classification for hydraulic systems

ISO 3448 - Viscosity classification for test fluids

ISO 8330 - Hoses and hose assemblies vocabulary

Keywords: ISO 6802:2018, hydraulic impulse test with flexing, rubber hoses, plastics hoses, hose assemblies, flex test rig, cool down leakage test, ISO VG 32-100.

ISO 6802:2018 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 6803:2017

Rubber or plastics hoses and hose assemblies - Hydraulic-pressure impulse test without flexing (ISO 6803:2017)

ISO 3448:1975

Industrial liquid lubricants — ISO viscosity classification

ISO/TR 11340:1994

Rubber and rubber products — Hydraulic hose assemblies — External leakage classification for hydraulic systems

SIST EN ISO 8330:2022

Rubber and plastics hoses and hose assemblies - Vocabulary (ISO 8330:2022)