Generic BS 1387 Galvanized Iron GI Pipe 3 Inch, Medium Class, 6m

3 Inch GI Pipe

The Generic BS 1387 Galvanized Iron GI Pipe 3 Inch, Medium Class, 6m is a high-grade steel conduit designed for water supply, gas distribution, and structural frames. This heavy-duty piping utilizes a hot-dip galvanizing process to ensure a thick layer of zinc protects the internal and external surfaces from oxidation. Contractors typically specify this 80mm nominal bore pipe for industrial plumbing where mechanical strength and environmental resistance are mandatory.

Built for the Job

This piping is frequently deployed in fire-fighting systems, chilled water lines, and outdoor irrigation headers. The 3-inch diameter provides high flow capacity for main distribution lines in residential or commercial complexes. Its rigid construction makes it suitable for handrails, scaffolding, and fencing in coastal or high-humidity areas where standard black steel would fail prematurely. The material handles high-pressure environments better than PVC, making it the standard for riser pipes and pump discharge lines.

• Installation of main water distribution lines in commercial buildings.

• Fabrication of heavy-duty industrial racks and safety barriers.

• Compressed air system reticulation in workshops and factories.

Product Highlights

Corrosion Protection

The hot-dip galvanized coating provides a sacrificial zinc layer that prevents rust even if the surface is scratched during transit.

Standard Compliance

• Manufactured to BS 1387:1985 (Medium Class) specifications.
• Tested for hydrostatic pressure to ensure leak-free performance under load.

Technical Specifications

What’s Included

• 1 x 6-Meter Length of 3-Inch GI Pipe

• 1 x Matching Threaded Coupling (Socket) pre-fitted

On-Site & Workshop Notes

• Use a heavy-duty pipe threader with appropriate lubrication to maintain thread integrity on the 80mm section.

• Apply galvanized-rich cold spray to any cut ends or exposed threads to prevent localized corrosion.

• Ensure all hangers and supports are rated for the combined weight of the steel and the fluid volume.

• Verify compatibility with malleable iron fittings for a consistent seal in pressurized systems.