IS 3818:1992 is the Indian Standard (BIS) for continuous (piano) hinges -specification. This standard specifies the requirements regarding materials, dimensions, manufacture, and finish of continuous (piano) hinges used primarily in cabinet making, furniture, and general building joinery.
Continuous (Piano) hinges -Specification
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Performance Testing (Cycle Life) | Not specified. The standard focuses on dimensional and material requirements. | Specifies three grades: Grade 1 (1,500,000 cycles), Grade 2 (500,000 cycles), Grade 3 (150,000 cycles). | ANSI/BHMA A156.26 |
| Hinge Types Covered | Pin-and-barrel continuous hinges only. | Pin-and-barrel, as well as geared continuous hinges. | ANSI/BHMA A156.26 |
| Material - Stainless Steel | Grade X04Cr19Ni9 of IS 6911 (equivalent to AISI 304). | Austenitic Stainless Steel, Type 304 (UNS S30400) or Type 316 (UNS S31600). | ANSI/BHMA A156.26 |
| Leaf Thickness (Steel) | Specifies thicknesses from 0.40 mm to 1.60 mm across various hinge sizes. | Typical range for architectural use is 0.060 in (1.52 mm) to 0.120 in (3.05 mm), generally thicker than the IS range. | ANSI/BHMA A156.26 |
| Load Bearing Test | No specific load bearing or sag test is mandated. | Mandatory vertical and lateral load tests are required to verify strength and resistance to door sag. | ANSI/BHMA A156.26 |
| Corrosion Resistance Test | No specific test method defined; relies on compliance with plating standards. | Requires salt spray testing per ASTM B117 with specified durations based on material and finish (e.g., 96 hours for plated steel). | ANSI/BHMA A156.26 |
| Material - Aluminium | Aluminium alloy conforming to Designation 63400 WP or 64430 WP of IS 733. | Aluminium alloy 6063-T6 or similar, conforming to relevant ASTM specifications. | ANSI/BHMA A156.26 |