IS 7268:1993 is the Indian Standard (BIS) for recommended practice for hot application of thermal insulation. This standard provides recommendations for the methods of applying thermal insulation to hot surfaces operating at temperatures above ambient. It covers material selection, surface preparation, application techniques for various insulation forms, and protective finishing to prevent damage and moisture ingress.
Provides recommended practices for the hot application of thermal insulation materials.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Personnel Protection Surface Temperature | Should not normally exceed 65°C (Clause 5.3) | Generally 50-60°C, subject to location and risk assessment. | BS 5970:2012 |
| Minimum Aluminum Jacketing Thickness (for pipe OD 300-600mm) | 0.71 mm (Table 3) | 0.7 mm (for insulation OD 356-610mm) | BS 5970:2012 |
| Spacing of Securing Bands on Pipework | Centres not exceeding 300 mm (Clause 8.2) | Approximately 300 mm centres. | BS 5970:2012 |
| Minimum Jacketing Overlap (Circumferential & Longitudinal) | 50 mm (Clause 9.4.2) | 50-75 mm, with specific guidance for sealing the lap. | CINI Manual / ASTM Practice |
| Max Service Temperature for 85% Magnesia Insulation | 315°C (Appendix A) | ≈315°C (600°F) | ASTM C489 (Withdrawn) |
| Requirement for Staggering Joints | Longitudinal and circumferential joints shall be staggered in multi-layer applications (Clause 7.1.3). | Mandated for multi-layer systems to prevent direct thermal leakage paths. | ASTM C1696 |
| Weatherproofing Sealant Specification | General requirement for 'a suitable mastic' at laps (Clause 9.4.3). | Specific requirement for non-setting butyl or silicone-based sealants compatible with service temperature. | ASTM C1696 / CINI Manual |