ISO 8434-2 PDFJune 16, 2020
ISO INTERNATIONAL. STANDARD. ISO. Second edition. Metallic tube connections for fluid power and general use —. Part 2. 37° flare couplings to ISO comprise a body. (1), pressure sleeve (2) and securing nut (3). By exchanging the pressure sleeve, the same coupling can be. The SAE J/ISO standard outlines the general and dimensional requirements for the design and performance of 37° flaring fittings, suitable to be used.
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Metallic tube connections for fluid power. Reference number ISO A Test data form. A Applicable tests for various fitting and stud end standards. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by.
The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.
International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. These test methods have been included in several International Standards, but because of their generic application to ports, studs and tube connections for both metric and inch connections, it was agreed that a separate standard should be established.
Additional tests are being considered. ISO consists of the following parts, under the general title Metallic tube connections for fluid power and general use: O-ring face seal fittings.
Test methods for threaded hydraulic fluid power connections.
SAE Single-Part Flanges and SAE Counterflanges
Annex A forms an integral part of this part of ISO Annexes A and N are for information only. In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Components must be designed to meet these requirements under varying conditions. Testing of components to meet performance requirements provides a basis of assurance for determining design application and for checking component compliance with the stated requirements.
This part of ISO specifies uniform methods for the testing and performance evaluation of threaded metallic tube connections and stud ends of ports for hydraulic fluid power. Tests outlined in this part of ISO are independent of each other and document the method to follow for each test; see the appropriate component International Standard for the test requirements and performance criteria.
The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO At the time of publication, the editions indicated were valid.
All standards are subject to revision, and parties to agreements based on this part of ISO are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. All components tested shall be tested in the final form as the customer receives the partincluding annealing as required for brazing.
Test results and test conditions shall be reported on the test data form given in annex A. Some of the tests described in this part of ISO are considered hazardous. It is therefore essential that, in conducting these tests, all appropriate safety precautions are strictly adhered to. Attention is drawn to the danger of burst, fine jets which can penetrate the skin and energy release of expanding gases.
To reduce the hazard of energy release, bleed air out of test specimens prior to pressure.
24° threaded pipe connections
Tests shall be set up and performed by properly trained personnel. Testing of three samples to confirm that the specified connection s meet s or exceed s a ratio of 2: The distance between the centrelines of test ports shall be a minimum of 1,5 times the port diameter. The distance between the port centreline and the edge of the test block shall be a minimum of 1 times the port diameter. Seals shall conform to their respective dimensional requirements, and O-rings shall meet or exceed the quality requirements for grade N general purpose of ISOif applicable.
For testing only, threads and contact surfaces shall be lubricated with hydraulic oil with a viscosity of VG 32 in accordance with ISO prior to application of torque. Tube connections and jso ends shall be tested at the required minimum torques of the respective connector standard, if specified.
Otherwise test at the minimum torque values supplied by the manufacturer. Adjustable stud torques shall be applied after being backed out one oso turn from finger. Parts that pass this test may be used for other tests or in production. Testing of three samples to confirm that the specified connection s is are capable of withstanding a minimum of four times the working pressure without failure.
Use the same equipment as in 5. Use the same procedures as in 5. Parts that pass 8434–2 test shall not be tested further, used or returned to stock.
Testing of six samples at their respective impulse pressure to confirm that they pass a cyclic endurance test for 1 cycles without leakage or component failure.
Use the lubricant specified in 5. Apply torque as specified in 5. The 84434-2 rate shall be uniform at 0,5 Hz to 1,3 Hz and shall conform to the wave pattern shown in ISO Testing of two samples to confirm that they are capable of withstanding a vacuum of 6,5 kPa 0, bar absolute pressure for 5 min without leakage. Use the same equipment as specified in 5.
Testing of six samples to confirm that they are capable of withstanding the overtorque qualification test when tested to the overtorque values shown in their respective standards. Connections shall be restrained during the test and the wrench shall be located at the threaded end of isk nut hex. Use the following statement in test oso, catalogues and sales literature when electing to comply with this part of ISO Specifications for connection being tested: Proof pressure test results: 84342- test Burst results: Cyclic endurance test results: Dimensions list any exceptions: Applicable tests for various fitting and stud end.
Fitting and stud end standards 1. Tests per ISO Annex N Bibliography informative. Heavy-duty S series and light-duty L series stud ends with elastomeric sealing type E.
Durable Male Jic 37 Degree Hydraulic Fittings SAE J ISO
Light-duty L series stud ends with sealing by O-ring with retaining ring types G and H. Stud ends for general use only with metal- to-metal sealing type B.
Heavy-duty S series stud ends – Dimensions, design, test methods and requirements. Light-duty L series stud ends – Dimensions, design, test methods and requirements. Stud ends with elastomeric sealing type E. Stud ends with metal-to-metal sealing type B. Heavy-duty S series stud ends. Light duty L series stud ends. Test methods for threaded hydraulic fluid power connections Reference number ISO Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
Test methods for threaded hydraulic fluid power connections Annex A forms an integral part of this part of ISO Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Metallic tube connections for fluid power and general use – Part 5: Test methods for threaded hydraulic fluid power connections 1 Scope This part of ISO specifies uniform methods for the testing and performance evaluation of threaded metallic tube connections and stud ends of ports for hydraulic fluid power.
Hardness Torque Pressure at failure Type of failure.
To reduce the hazard of energy release, bleed air out of test specimens prior to pressure testing. Adjustable stud 8434- shall be applied after being backed out one full turn from finger- tight position to test correctly the worst possible actual assembly conditions.