IS 453:1993 is the Indian Standard (BIS) for double acting spring hinges -specification. This standard specifies the requirements for materials, dimensions, manufacture, finish, and testing of double acting spring hinges. These hinges are typically used for swing doors that need to open in both directions and return to a closed position automatically.
Double Acting Spring Hinges -Specification
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Endurance Test Cycles (Steel/Iron) | 100,000 cycles | 1,000,000 cycles (for Grade 1) | ANSI/BHMA A156.17-2019 |
| Endurance Test Cycles (Brass) | 50,000 cycles | 1,000,000 cycles (for Grade 1, material independent) | ANSI/BHMA A156.17-2019 |
| Closing Performance Criterion | Door closes from 90° to within 12.5 mm of the center closed position. | Specifies closing time from 70° (e.g., 3-7 seconds) and minimum closing force. | ANSI/BHMA A156.17-2019 |
| Corrosion Resistance Test | No quantitative test specified; relies on finish like paint or plating. | Min. 96 hours neutral salt spray test (ASTM B117) for high grades. | ANSI/BHMA A156.1-2016 |
| Material Specification | Prescriptive: Cast Iron, Malleable Cast Iron, Mild Steel, Cast Brass. | Performance-based: Any material that passes all required tests. | ANSI/BHMA A156.17-2019 |
| Grading System | No grading system; single pass/fail specification. | Three-tiered grading system (Grade 1, 2, 3) based on performance. | ANSI/BHMA A156.17-2019 |