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GI Pipes

Grades, sizes and the unit each material is priced in.

Overview

What this covers

GI pipe is steel pipe with a zinc coating for corrosion resistance. It is normally specified by nominal bore and by class, where the class relates to wall thickness. Both are needed to quote it.

Applications

Typical uses

Water supply lines where GI is specified
Structural and fencing applications
Handrails and posts in exposed positions
Conduit and sleeving

Specification

What identifies the material

These are the details a quotation works from. The more you can give, the fewer questions come back.

Nominal bore
Class, where specified
Length per piece
Quantity in pieces, metres or weight
Threaded ends, where required
Whether the application is water supply or structural

Add it

Add to your material list

Add a line to your material list

Size and quantity are what a quotation needs. Everything else helps.

MaterialGrade / classSize / sectionThicknessLength per pieceQuantityUnitCut lengths requiredDeliveryUnloading

Notes

Review material list

Grade, size and availability are confirmed at quotation. Cutting capability, tolerance, minimum length and charges are confirmed during quotation.

Calculate

Work out the weight or quantity

The calculator prints the formula and the density it used, so the figure can be checked.

Theoretical calculated weight only. Calculator results are preliminary estimates for requirement and quotation preparation. They are derived from published geometry and a stated density, and actual weight varies within manufacturing tolerance. Final material specification and structural quantities must follow drawings, BOQ and engineer or project requirements.

Open the calculator

Price

What affects the price

Material and grade
Section size and wall thickness
Quantity
Current market rate
Cut lengths, where required and available
Transport
Unloading arrangements
Galvanising and class

We do not publish rates. Current rates are confirmed at quotation because material and transport pricing can change.

Availability

What affects availability

Size and section
Grade or class specified
Quantity required
Whether the size is held or ordered in
Supplier location
Transport availability

Availability varies by grade, size, thickness, length, brand, quantity and specification. Current status is confirmed at quotation. Nothing on this website states stock or a delivery date.

Quotation

What to send with an enquiry

Material and grade or class
Section, diameter, width, height and wall thickness
Length per piece, and whether cut lengths are required
Quantity in the unit you buy
Delivery location and site access
Who unloads at the far end
The date it is needed on site

Avoid

Common mistakes

Not stating the class where the application requires a specific one
Assuming structural GI and water-supply GI are interchangeable without checking
Ordering unthreaded pipe for a threaded installation

Questions

Frequently asked

What does the class of a GI pipe mean?

Class relates to wall thickness for a given nominal bore. Where your specification names a class, state it — substituting classes changes both the pressure capability and the price.

Can GI pipe be used for drinking water?

That depends on the specification, the application and any regulatory requirement that applies. Tell us the application and the specification you are working to, and we will quote to it rather than assume.