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SAE J517-2020: Key Updates and Specifications for Hydraulic Hose Selection
The SAE J517-2020 standard provides critical specifications for the most common hydraulic hoses used in mobile and stationary equipment. This revision introduces important changes, including the discontinuation of certain hose types and updates to pressure ratings. Understanding these requirements is essential for engineers and procurement professionals to ensure system safety and performance.
Overview and Scope
SAE J517-2020 covers general, dimensional, and performance specifications for 100R-series hoses. It applies to both inch-based and metric hose sizes. The standard emphasizes that the maximum working pressure of a hose assembly must not exceed the lower of the hose and fitting pressure ratings. For marine applications, additional standards such as SAE J1475, J1942, and J1942-1 apply.
🛠️ Design Insight: Always verify that the maximum working pressure of the hose assembly is limited by the lower rating of the hose and the fittings. Refer to SAE J516, J518, and J1453 for fitting specifications. Additionally, note that metric hose size numbers are labels, not dimensions (per ISO 4397).
Key Changes and Discontinued Hose Types
The 2020 revision discontinued several hose types due to lack of demand:
- 100R9, 100R10, and 100R11
- 100R1A, 100R2A, 100R2B, and 100R2BT
Replacements: Use 100R1AT for 100R1A, and 100R2AT for the 100R2A/2B/2BT types. The maximum working pressures for 100R1AT, 100R2AT, and 100R16 have been replaced by type S pressures, eliminating the need for separate labeling.
⚠️ Warning: Using discontinued hose types can lead to non-compliance and potential safety risks. Always specify current types and verify pressure ratings with the manufacturer.
Design and Selection Considerations
Proper selection of hose assemblies involves considering pressure ratings, dimensional requirements, and environmental factors. The standard includes detailed tables for maximum working pressures. Below is a summary for common hose types:
| Hose Type | Metric Size (Dash) | Max Working Pressure (MPa) |
|---|---|---|
| 100R1AT | 6.3 (-4) | 22.5 |
| 100R2AT | 6.3 (-4) | 40 |
| 100R3 | 6.3 (-4) | 8.4 |
| 100R7 | 6.3 (-4) | 19.2 |
| 100R12 | 12.5 (-8) | 28 |
| 100R13 | 19 (-12) | 35 |
Note: Minimum burst pressure is at least four times the maximum working pressure. Refer to the full standard for complete data.
Age Control and Storage
Hoses are affected by environmental factors. The standard recommends first-in-first-out usage based on manufacturing date. Refer to SAE J1273 for storage guidelines and shelf life.
Frequently Asked Questions
1. Which hose types have been discontinued in SAE J517-2020?
100R9, 100R10, 100R11, 100R1A, 100R2A, 100R2B, and 100R2BT were discontinued. Replacements are 100R1AT and 100R2AT.
2. How is the maximum working pressure of a hose assembly determined?
The assembly pressure must not exceed the lower of the hose’s maximum working pressure and the fitting’s maximum working pressure.
3. What are the storage recommendations for hydraulic hoses?
Store hoses in a controlled environment to minimize exposure to ozone, heat, and sunlight. Follow first-in-first-out usage based on the manufacturing date. See SAE J1273 for details.
4. Why were the 100R1AT and 100R2AT pressure ratings replaced by type S?
Starting in 2009, the labeling requirement was eliminated as the pressure ratings were consolidated under type S to simplify identification.
By adhering to these specifications, engineers can design reliable hydraulic systems that meet industry standards. Always consult the latest version of SAE J517 and related documents for complete requirements.
