ISO 19879:2021 PDF

Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid power connections

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Title (English):

ISO 19879:2021

Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid power connections

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 19
Publication date:: March 15, 2021
Edition:: ISO IS 19879 edition 3 version 1
ICS:: 23.040.60

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Description (English):

This document specifies uniform methods for the testing and performance evaluation of metallic tube connections, stud ends for ports and flange connections for use in hydraulic fluid power applications. This document does not apply to the testing of hydraulic quick-action couplings, which is covered by ISO 18869. Tests outlined in this document are independent of each other and document the method to follow for each test. See the appropriate component International Standard for indications of which tests to conduct and for performance criteria. For qualification of the connector, the minimum number of samples specified in this document is tested, unless otherwise specified in the relevant connector standard or as agreed upon by the manufacturer and the user.

Technical details

Technical committee: ISO/TC 131/SC 4 - Connectors and similar products and components
SKU: ISO 19879:2021

Abstract

Overview

ISO 19879:2021 - "Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections" defines uniform test methods for assessing the performance and safety of metallic tube connections, stud ends for ports, and flange connections used in hydraulic fluid power systems. The standard describes independent test procedures (so each test can be applied separately), minimum sample requirements for qualification, and general test-assembly and equipment requirements. It explicitly excludes hydraulic quick-action couplings (see ISO 18869).

Key topics and technical requirements

Scope and applicability
- Covers metallic tube connections, stud ends and flange connections for hydraulic fluid power and general use.
- Tests are independent; component-specific standards indicate which tests and performance criteria to use.
Test assemblies and equipment
- Defines Type 1 and Type 2 test-assembly configurations for tube connections and male stud ends.
- Specifies requirements for test blocks, seals, lubrication, torque, temperature control, and test reporting.
Principal test methods
- Repeated assembly test - evaluates reusability and sealing after multiple assemblies.
- Leakage test - detects fluid leakage under specified pressure and conditions.
- Proof test - verifies structural integrity at designated proof pressures.
- Burst test - establishes failure/burst pressure characteristics.
- Cyclic endurance (impulse) test - assesses fatigue life under pressure cycling.
- Vacuum test - checks performance under reduced-pressure conditions.
- Overtightening test - evaluates resistance to assembly torque beyond recommended limits.
- Vibration test and Cyclic endurance with vibration - simulate dynamic service conditions.
Safety and reporting
- Emphasizes safety precautions for hazardous tests (bursting, jets, energy release) and mandates appropriate PPE and trained personnel.
- Requires clear test reports and identification statements referencing ISO 19879.

Practical applications - who uses this standard

Manufacturers and designers of hydraulic fittings and metallic tube connections use ISO 19879 to qualify new connector designs and verify production quality.
Test laboratories and QA teams apply standardized procedures for repeatable, comparable results across components and vendors.
OEMs and procurement specialists reference the standard when specifying connector performance for hydraulic systems in mobile equipment, industrial machinery, and fluid power assemblies.
Certification bodies and regulatory auditors use the test methods to assess conformity with component standards.

Related standards

ISO 18869 - hydraulic quick-action couplings (excluded from ISO 19879)
ISO 10763 - precision steel tubes for hydraulic systems
ISO 3601-3 - O-ring quality acceptance
ISO 6605 - test methods for hoses and hose assemblies
ISO 5598 - fluid power vocabulary

Keywords: ISO 19879:2021, metallic tube connections, hydraulic fluid power, test methods, leakage test, burst test, cyclic endurance, vibration test, connector qualification.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and applicability
- Covers metallic tube connections, stud ends and flange connections for hydraulic fluid power and general use.
- Tests are independent; component-specific standards indicate which tests and performance criteria to use.
Test assemblies and equipment
- Defines Type 1 and Type 2 test-assembly configurations for tube connections and male stud ends.
- Specifies requirements for test blocks, seals, lubrication, torque, temperature control, and test reporting.
Principal test methods
- Repeated assembly test - evaluates reusability and sealing after multiple assemblies.
- Leakage test - detects fluid leakage under specified pressure and conditions.
- Proof test - verifies structural integrity at designated proof pressures.
- Burst test - establishes failure/burst pressure characteristics.
- Cyclic endurance (impulse) test - assesses fatigue life under pressure cycling.
- Vacuum test - checks performance under reduced-pressure conditions.
- Overtightening test - evaluates resistance to assembly torque beyond recommended limits.
- Vibration test and Cyclic endurance with vibration - simulate dynamic service conditions.
Safety and reporting
- Emphasizes safety precautions for hazardous tests (bursting, jets, energy release) and mandates appropriate PPE and trained personnel.
- Requires clear test reports and identification statements referencing ISO 19879.

Practical applications - who uses this standard

Manufacturers and designers of hydraulic fittings and metallic tube connections use ISO 19879 to qualify new connector designs and verify production quality.
Test laboratories and QA teams apply standardized procedures for repeatable, comparable results across components and vendors.
OEMs and procurement specialists reference the standard when specifying connector performance for hydraulic systems in mobile equipment, industrial machinery, and fluid power assemblies.
Certification bodies and regulatory auditors use the test methods to assess conformity with component standards.

Related standards

ISO 18869 - hydraulic quick-action couplings (excluded from ISO 19879)
ISO 10763 - precision steel tubes for hydraulic systems
ISO 3601-3 - O-ring quality acceptance
ISO 6605 - test methods for hoses and hose assemblies
ISO 5598 - fluid power vocabulary

Keywords: ISO 19879:2021, metallic tube connections, hydraulic fluid power, test methods, leakage test, burst test, cyclic endurance, vibration test, connector qualification.

ISO 19879:2021 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses this standard

Related standards

Related standards

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