Steel Pipes & Tubing, Cebu
GI Pipe
GI pipe is steel pipe with a zinc coating that resists corrosion. It is used for water lines, fence posts, handrails, and light structural work. Pipe is specified by its nominal bore in inches and by its schedule, which sets the wall thickness.
Specification
Sizes and variants
Schedule 20
The lighter wall. Common for fencing, railings, and non-pressure applications.
1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4"
Schedule 40
The heavier wall, for water lines and anywhere the pipe carries pressure or load.
1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4"
Galvanized fence tube
A lighter-wall tube made for fencing rather than pressure.
1/2" through 4", in Schedule 20 and Schedule 40
Quality tiers
Stocked in several tiers, in both galvanized (GI) and black iron (BI), so the specification can be matched to the job and the budget.
Ask for the tier that suits the application
- Length
- 6 metres
- Metric equivalents
- 15mm, 20mm, 25mm, 32mm, 40mm, 50mm, 65mm, 80mm, 100mm
- Finish
- Hot-dip galvanized
Availability varies by size. Other sizes can often be sourced on request.
Checking a price?
Steel prices move with the market, so published figures date quickly. Send a list of sizes, grades, and quantities for a current quotation.
Applications
Where it is used
- Water supply lines
- Fence posts and framework
- Handrails and balustrades
- Light structural and support work
Questions
About gi pipe
What is the difference between Schedule 20 and Schedule 40?
The schedule sets the wall thickness. Schedule 40 has a thicker wall than Schedule 20 at the same nominal size, so it withstands more pressure and takes more abuse. Water lines normally call for Schedule 40, while fencing and railings often use Schedule 20.
Why is pipe sized in inches when the diameter is in millimetres?
Pipe is specified by nominal bore, a naming convention rather than a measurement, so a 1 inch pipe is not exactly 25.4mm anywhere on it. The metric figure quoted alongside, such as 25mm for 1 inch, is the equivalent designation and not the actual outside diameter.
What is the difference between GI pipe and GI tube?
Pipe is specified by nominal bore and schedule and is designed to carry fluid. Tube is specified by its actual outside dimensions and wall thickness and is normally used structurally. They are not interchangeable when the application involves pressure.
Looking for other sizes or grades? See the full Steel Pipes & Tubing range.
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