IS 458:2003 Part 1 is the Indian Standard (BIS) for precast concrete pipes (with and without reinforcement) - part 1: requirements for spun pipes. IS 458 specifies the manufacturing, dimensional, and testing requirements for precast concrete pipes (both reinforced and unreinforced). It is widely used by civil and infrastructure engineers to select appropriate pipe classes (like NP2, NP3, and NP4) for sewerage, drainage, highway culverts, and water mains based on traffic loads and burial depths.
Specifies requirements for spun precast concrete pipes, with or without reinforcement, used for water and sewage conveyance.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Three-Edge Bearing Test - Serviceability Crack Width | 0.25 mm | 0.01 in (0.25 mm) | ASTM C76-23 |
| Minimum Reinforcement Cover (Inner Cage, ≥600mm dia pipe) | 25 mm | 1 in (25.4 mm) | ASTM C76-23 |
| Maximum Water Absorption (by mass) | 6.5% (after 10 min boiling) | 8% (after 5-hour boil, for standard concrete) | ASTM C76-23 (via ASTM C497) |
| Hydrostatic Test Pressure (Low-Pressure Class) | 0.2 MPa (for P1 Class) | 200 kPa (0.2 MPa) (for Class 1 pressure pipe) | AS/NZS 4058:2007 |
| Reinforced Pipe Class Designation (Example) | NP3 (a medium-duty class) | Class III (a medium-duty class) | ASTM C76-23 |
| Tolerance on Internal Diameter (<600mm) | ±1.5% | ±1% or ±10mm, whichever is greater (varies slightly by class) | BS EN 1916:2002 |
| Permitted Cement Types | Lists specific IS codes (e.g., IS 269 for OPC, IS 1489 for PPC) | Lists specific ASTM codes (e.g., ASTM C150 for Portland, ASTM C595 for Blended) | ASTM C76-23 |