EN ISO 1179-2:2022 PDF

Overview

EN ISO 1179-2:2022 specifies dimensions, performance requirements and test procedures for stud ends (male connectors) with ISO 228-1 threads using elastomeric sealing (type E). It covers two series:

• Heavy‑duty (S series) - suitable for working pressures up to 63 MPa (630 bar).
• Light‑duty (L series) - suitable for working pressures up to 25 MPa (250 bar).

The standard applies to connectors detailed in ISO 8434-1, ISO 8434-2 and ISO 8434-6, and replaces the earlier edition (EN ISO 1179-2:2013).

Key topics and technical requirements

• Dimensions and tolerances for stud ends and mating ports based on ISO 228-1 thread geometry.
• Elastomeric seal specifications (type E), including material requirements and hardness references (e.g., ISO 48-2).
• Performance requirements: rated working pressures for S and L series with caveats that permissible pressure depends on size, materials, design and application.
• Test procedures and reporting: test methods and test-reporting requirements aligned with ISO 19879 (metallic tube connection test methods).
• Interchangeability warning: explicit caution about hazards from mixing stud ends and ports of different types - important for safety and system integrity.
• Designation and identification: standardized naming and marking to ensure correct component selection and traceability.
• Updates from previous edition include added material requirements for elastomeric seals, revised test method references and clarified reuse guidance.

Practical applications and who uses this standard

• Hydraulic and pneumatic system designers selecting threaded ports and stud ends for fluid power applications.
• Manufacturers of tube fittings, hose fittings, and hydraulic connectors ensuring dimensional and performance compliance.
• OEMs, procurement teams and maintenance engineers specifying components for high‑pressure hydraulic systems in mobile equipment, industrial machinery and test rigs.
• Test laboratories and certification bodies conducting conformity and pressure testing per the referenced procedures.
• Standards and safety engineers assessing interchangeability and compatibility risks when retrofitting or servicing existing systems.

Related standards

• ISO 228-1 (thread form and dimensions)
• ISO 8434-1, ISO 8434-2, ISO 8434-6 (connector families)
• ISO 19879 (test methods for hydraulic connections)
• ISO 48-2 (elastomer hardness test)
• Guidance: ISO 6149 and ISO 16030 recommended for new hydraulic/pneumatic designs (see Introduction)

This standard is essential when specifying or validating threaded stud ends with elastomeric sealing in pressure-critical fluid power systems. Keywords: EN ISO 1179-2:2022, stud ends, ISO 228-1, elastomeric sealing, heavy‑duty S series, light‑duty L series, hydraulic connectors.