Fluidsystem och delar: allmänt

Modifications to EN 14917:2021

This document specifies requirements for four types of wire braid reinforced hoses and hose assemblies of nominal bore from 5 to 76: Types 1SN, 2SN, 1ST and 2ST. They are suitable for use with: - hydraulic fluids in accordance with ISO 6743 4 with the exception of HFD R, HFD S and HFD T at temperatures ranging from −40 °C to +100 °C; - water based fluids at temperatures ranging from −40 °C to +70 °C; - water at temperatures ranging from 0 °C to +70 °C. The hoses are not suitable for use with castor oil based and ester-based fluids. This document does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. NOTE Requirements for hydraulic hoses for underground mining are covered in other documents.

This document specifies requirements for four types of rubber-covered spiral wire reinforced hydraulic hoses and hose assemblies of nominal bore from 6 to 51: Types 4SP, 4SH, R13 and R15. They are suitable for use with: - hydraulic fluids covered in ISO 6743-4 with the exception of HFD R, HFD S and HFD T at temperatures ranging from −40 °C to +100 °C for types 4SP and 4SH and −40 °C to +120 °C for types R13 and R15; - water based fluids at temperatures ranging from −40 °C to 70 °C; - water fluids at temperatures ranging from 0 °C to 70 °C. The hoses are not suitable for use with castor oil based nor ester-based fluids. This document does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. NOTE Requirements for hydraulic hoses for underground mining are covered in a different document.

This document specifies requirements for two types of wire braid reinforced compact hoses and hose assemblies of nominal bore from 6 to 76, types 1SC and 2SC. They are suitable for use with: - hydraulic fluids in accordance with ISO 6743-4 with the exception of HFD R, HFD S and HFD T at temperatures ranging from −40 °C to +100 °C; - water based fluids at temperatures ranging from −40 °C to +70 °C; - water at temperatures ranging from 0 °C to +70 °C. The hoses are not suitable for use with castor oil based nor phosphoric ester-based fluids. This document does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. NOTE Requirements for hydraulic hoses for underground mining are covered in other documents.

This document specifies requirements for three types of textile reinforced rubber hoses and hose assemblies of nominal bore from 5 to 100. The types are defined in Clause 4. They are suitable for use with: - hydraulic fluids in accordance with ISO 6743-4 with the exception of HRD R, HFD S and HFD at temperatures ranging from −40 °C to 100 °C; - water-based fluids at temperatures ranging from −40 °C to +70 °C; - water at temperature ranging from 0 °C to +70 °C. The hoses are not suitable for use with castor oil based and ester-based fluids. The document does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. NOTE Requirements for hydraulic hoses for underground mining are covered in other documents.

This document specifies an automatic particle counting procedure for determining the number and sizes of particles present in hydraulic-fluid bottle samples of clear, homogeneous, single-phase liquids using an automatic particle counter (APC) that works on the light-extinction principle.

This document is applicable to the monitoring of:

a)      the cleanliness level of fluids circulating in hydraulic systems;

b)      the progress of a flushing operation;

c)       the cleanliness level of support equipment and test rigs;

d)      the cleanliness level of packaged stock fluid.

NOTE           Measurements can be made with particles suspended in the original liquid or in a sample of the liquid diluted with a compatible liquid when APC coincidence error limits are exceeded.

This document specifies a bubble-point test method applicable to filter elements used in hydraulic fluid power systems. It can be used both to verify the fabrication integrity of a filter element (by checking the absence of bubbles) and to permit the localization of the largest pore of the filter element by determining the first bubble point.

NOTE Verification of fabrication integrity is used to define the acceptability of the filter elements for further use or testing.

The first bubble point is established through continuation of the fabrication integrity test. It is under no circumstances a functional characteristic of a filter element; in particular, it cannot be used to estimate filtration rating, efficiency or retention capacity and is intended to be used for information only.

This document specifies a method to normalise fabrication integrity and bubble point data to a standard value of surface tension when test fluids other than 2-propanol are used.

This document specifies procedures for the following:

a) primary particle-sizing calibration for particle sizes 1 µm(c) and larger, sensor resolution and counting performance of liquid automatic particle counters that are capable of analysing bottle samples;

b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC;

c) establishing acceptable operation and performance limits;

d) verifying particle sensor performance using a test dust;

e) determining coincidence and flow rate limits.

This document is applicable for use with hydraulic fluids, aviation and diesel fuels, engine oil and other petroleum-based fluids. This document is not applicable to particle-sizing calibration using NIST SRM 2806b primary calibration suspensions.

This document describes the following:

—   a multi-pass filtration performance test with continuous contaminant injection for hydraulic fluid power filter elements;

NOTE 1  For the background interlaboratory study used to verify the test methodology, see Annex D.

—   a procedure for determining the contaminant capacity, particulate removal and differential pressure characteristics;

—   a test currently applicable to hydraulic fluid power filter elements that exhibit an average filtration ratio greater than or equal to 75 for particle sizes ≥ 25 µm(c), and a final reservoir gravimetric level of less than 200 mg/L;

NOTE 2  It is necessary to determine by validation the range of flow rates and the lower particle size limit that can be used in test facilities.

—   a test using ISO medium test dust (ISO MTD) contaminant and a test fluid in accordance with Annex A.

This document is intended to provide a test procedure that yields reproducible test data for appraising the filtration performance of a hydraulic fluid power filter element without influence of electrostatic charge.

This document applies to three test conditions:

—   test condition 1, with a base upstream gravimetric level of 3 mg/L;

—   test condition 2, with a base upstream gravimetric level of 10 mg/L;

—   test condition 3, with a base upstream gravimetric level of 15 mg/L.

This document specifies the requirements for two types of rubber hoses and rubber hose assemblies for loading and discharge of liquid hydrocarbon fuels with a maximum working pressure of 10 bar (1,0 MPa). Both types of hose are designed for: a) use with hydrocarbon fuels, having an aromatic hydrocarbon content not exceeding 50 % by volume and containing oxygenated compounds up to 15 %; b) operation within the temperature range of −30 °C to +70 °C, undamaged by climatic conditions of −50 °C to 70 °C when stored in static conditions. This document is not applicable to hoses and hose assemblies for LPG, aviation fuel systems, fuel station systems and marine applications.

This document specifies procedures suitable for the analysis of data which, when converted into logarithms of the values, have either a normal or a skewed distribution. It is intended for use with test methods and referring standards for glass-reinforced thermosetting plastics (GRP) pipes or fittings for the analysis of properties as a function of time. However, it can also be used for the analysis of other data. Two methods are specified, which are used depending on the nature of the data. Extrapolation using these techniques typically extends a trend from data gathered over a period of approximately 10 000 h to a prediction of the property at 50 years, which is the typical maximum extrapolation time. This document only addresses the analysis of data. The test procedures for collecting the data, the number of samples required and the time period over which data are collected are covered by the referring standards and/ or test methods. Clause 6 discusses how the data analysis methods are applied to product testing and design.