Galvanised Pipes

Galvanised Pipes


Galvanised pipes are carbon steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust. The zinc provides a protective barrier against corrosion when exposed to the outdoor environmental elements and indoor humidity. There are two types of galvanised pipe: hot dipped galvanised pipe and cold galvanised pipe. Galvanised pipes are a cheaper alternative to stainless steel pipes, while maintaining comparable strength and protection against rust.


Uses of galvanised pipe include general fabrication, manufacturing, frames, construction, water and sewer lines, chemical processing, steel scaffolding, sprinkler and irrigation systems and automotive industry.


Galvanised pipe can be grouped into 3 categories: Allied flo-coat pipe, pre-galvanised pipe and Schedule 40 hot dipped galvanised pipe. Details of these types are as following:

Allied Flo-Coat PipeCold formed, welded with high frequency and hot-dipped galvanization. Produced in accordance with ASTM A1008/A1008M and A1011/A1011M standards with a minimum productivity strength of 30,000 psi.
Pre-Galvanised PipeCold formed and welded with radio frequency pre-galvanized steel strip. Pre-galvanized steel needs to conform to ASTM A446 standard.
Schedule 40 Hot Dip Galvanised PipeNot covered by any specification. Outside diameter and the wall thickness are defined by other specifications as for non-galvanised pipes. Typically hot formed and butt welded, or cold formed and high frequency welded.

Common Sizes and Specifi­cations

Nominal Inner DiameterOuter DiameterWall ThicknessLength
DN1521.3mm2.8mmUp to 6000mm
DN2026.9mm2.8mmUp to 6000mm
DN2533.7mm3.2mmUp to 6000mm
DN3242.4mm3.5mmUp to 6000mm
DN4048.3mm3.5mmUp to 6000mm
DN5060.3mm3.8mmUp to 6000mm
DN6576.1mm4mmUp to 6000mm
DN8088.9mm4mmUp to 6000mm
DN100114.3mm4mmUp to 6000mm
DN125140mm4.5mmUp to 6000mm
DN150168.3mm4.5mmUp to 6000mm
DN200219.1mm6mmUp to 6000mm
DN200219.1mm6.5mmUp to 6000mm

Other galvanised pipe sizes are available upon request. You can request to cut your galvanised pipe down to size.

Mechanical Properties

PropertiesFlo-Coat ProcessPre-GalvanisedHot Dip (Schedule 40)
Bright FinishExcellentFairPoor
Uniform FinishExcellentGoodPoor
Paint AdhesivenessExcellentFairPoor
Interior Corrosion ResistanceExcellentPoorGood
Exterior Corrosion ResistanceExcellentFairGood
Yield StrengthExcellentGoodFair

Kian Huat Metal

Kian Huat Metal is Singapore’s leading galvanised pipe supplier with a wide distribution network that spans over 20 countries in the Asia Pacific region. With over 30 years of experience, we provide the very best quality products, prompt delivery and highest standard of services at competitive prices. At Kian Huat Metal, we supply an extensive range of metals for various applications. Our inventory includes: stainless steel, structural steel, mild steel, galvanised steel, aluminium, brass, bronze and copper. Our hot rolled and cold rolled steel is available in a wide range of shapes including: bars, rods, universal beams, universal columns, pipes, hollow sections, channels, sheets and plates. We can cut according to your exact specifications.

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We ensure product quality and consistency through best practices and quality control that conform to local and international standards.

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Our highly skilled team of drivers will ensure your orders are delivered within the time requested.

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We offer a competitively priced and extensive range of steel products for all industries.

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