Complete Guide to Water Transmission Pipelines

Water transmission pipelines are large-diameter pipelines that carry bulk water from its source — a dam, reservoir, bore well field, or water treatment plant — to distribution networks serving cities, towns, and industrial areas. This guide covers the key design, material, and construction aspects of water transmission pipeline projects in India.

Key Design Parameters

• Design flow: Based on population projections for 20-30 years ahead
• Pipe diameter: Designed for acceptable flow velocity (0.6 to 2.5 m/s typical)
• Operating pressure: Based on static head and friction losses in the system
• Pipe material: Selected based on diameter, pressure, soil conditions and budget
• Anti-corrosion protection: Critical for underground MS pipelines

Construction Phases

• Route survey and alignment finalization
• Clearing and grubbing of right-of-way
• Trench excavation to required depth and width
• Pipe laying and jointing (welding, fusion, or rubber ring)
• Anti-corrosion coating inspection and repair
• Bedding with selected granular material
• Backfilling and compaction in layers
• Hydrostatic pressure testing before commissioning