About Steel Mains
Australian made since 1878.
Originating in 1878, Steel Mains is Australia's largest manufacturer and supplier of Mild Steel water pipeline systems, with a proud history of water infrastructure delivery for over 140 years.
Since 1878
Our History
Originating in 1878, Steel Mains is Australia’s largest manufacturer and supplier of water pipeline systems with a proud history of infrastructure delivery for over 140 years. Our expertise has been built and tested supplying thousands of kilometres of pipeline through Australia’s harsh and varied landscapes and in select overseas markets. Our reputation is for making water supply easy by manufacturing and supplying a complete range of steel pipes, fittings and componentry with our world leading jointing and corrosion protection systems.
Steel Mains remains at the forefront of Mild Steel jointing, coating and lining technology and continues to work closely with the Water Industry to evolve and strengthen our offering to the market. Regardless of the size of the project, Steel Mains is ready to help you deliver on your next critical water infrastructure project.
Our services
A complete pipeline system
Steel Mains services clients across the water and wastewater infrastructure space, as well as industrial sectors, partnering with asset owners, contractors, and design engineers to deliver tailored pipeline solutions. We are proud to service clients in Australia, New Zealand, the Pacific Islands and across Southeast Asia.
Steel Mains Manufacturing Plants
Steel Mains is committed to manufacturing in Australia to support Australian jobs and meet Australian Mild Steel standards. Steel Mains are the leaders in the manufacture of Mild Steel Pipes of varying sizes and diameters. Please see below, Steel Mains manufacturing plant locations.
30 minutes north of Melbourne CBD
- Production capacity
- 40,000 tonnes per annum
- Site size
- 35 acres (140,000 sqm), with room for loadout and storage
- Capability
- 2x spiral mill + production line, fittings fabrication
- Pipe Diameter: 114mm – 2,500mm
- Pipe Thickness: 4.5mm – 25mm
- Pipe Length: 6.0 – 13.5 metres
- Fittings: Fabrication, end forming, coating and lining
40 minutes south of Perth CBD
- Production capacity
- 30,000 tonnes per annum
- Site size
- 23 acres (93,000 sqm), with room for loadout and storage
- Capability
- 1x spiral mill + production line
- Pipe Diameter: 508mm – 1,829mm
- Pipe Thickness: 5mm – 20mm
- Pipe Length: 11.7 – 12.2 metres
Manufacturing Standards
Technical & Manufacturing Standards
Steel Mains manufactures Steel Pipe and Fittings in accordance and in compliance with the following Australian and New Zealand Standards.
Steel Pipe Manufacture
- AS 1579 Arc welded steel pipes and fittings for water and waste water
- AS/NZS 1594 Hot-rolled steel flat products
- AS/NZS 3678 Hot-rolled structural steel plates, floor plates and slabs
Sintakote®
- AS 4321 Fusion bonded medium density polyethylene coatings and linings for pipes and fittings
Cement Mortar Lining
- AS 1281 Cement mortar lining of steel pipes and fittings
Sintajoint Rubber Rings
- AS 1646 Elastomeric seals for waterworks purposes
Accreditation
Accreditation & Approvals
Steel Mains manufactures premium quality Steel Pipe and Fittings in accordance and in compliance with Australian Standards. Our manufacturing plants are domestically located in Kwinana (Western Australia) and Somerton (Victoria). Steel Mains facilities operate to the highest environmental, quality and safety systems standards.
Steel Mains holds an approved Product Standardsmark Licence demonstrating an extended level of compliance to these minimum requirements of AS1579.
WSAA Appraisal & Certification
The Water Services Association of Australia (WSAA) is the peak industry body representing the urban water industry in Australia and provides recognised Third Party appraisal and certification for materials supplied to water infrastructure projects.
Please download a copy of Steel Mains' WSAA certification from the link below:
Please find below relevant Third Party accreditations dealing with Environmental, OHS, Quality and Product Standardsmark certification to AS1579 (Arc-welded steel pipes and fittings for water and waste water) standards.
Approvals
Steel Mains and its forerunners are Australia's leading supplier of Mild Steel Pipe and Fittings to the water industry. We have worked with many of the major water authorities and councils around Australia to have our products approved for works to be carried out in their respective regions. Below you will find links of various water approvals from water agencies around Australia.
Sustainability
Sustainability at the core of our operations
At Steel Mains, sustainability is at the core of our values and operations. We are committed to minimising our environmental impact, promoting eco-friendly practices and contributing to a better future for all, supported by our Environmental Product Declaration (EPD) and 2025 ESG Report.
View sustainability documentsWaterAid
A proud Gold Corporate Member
Building communities and providing Solutions for Life is at the core of our existence, which is why Steel Mains is a proud supporter of WaterAid as a Gold Corporate Member, helping bring a clean and sustainable supply of water to communities.
Visit WaterAidLeadership Team
Meet our leadership team
The experienced team leading Steel Mains across operations, engineering, commercial and corporate services. Select a profile to read the full bio.
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