Polywelding Services

Butt Welding

Butt Fusion is a thermofusion process which involves the simultaneous heating of the ends of two pipe/fitting components which are to be joined, until a molten state is attained on each contact surface. Poly Welding Specialists weld large and small bore sizes from 40mm to 1600mm diameter. We high pressure fuse from 40mm – 710mm and use dual fusion from 710mm – 1600mm in line PIPA guidelines. Poly Welding Specialists specialize in all aspects of welding including in trench welding – tie ins, string work, bypasses, and fabrication.


Poly Welding Specialists work on numerous sub division projects including those in the jurisdiction of City West Water, Yarra Valley Water, South East Water, Melbourne Water, Barwon Water and Western Water where we undertake HDPE fusion, intrench welding, electrofusion and shutdowns.


Electrofusion is a method of joining MDPE, HDPE and other plastic pipes using special fittings that have built-in electric heating elements which are used to weld the joint together. Poly Welding Specialists use state of the art equipment to electrofuse from 20mm – 800mm.

Gas Pipelines

Poly Welding Specialists have undertaken high and low pressure installation of new mains and upkeep of existing mains. We have accredited team members holding Certificate II and Certificate III Utilities Industry.

Internal & External DeBeading

Internal Debeading is the effective removal of internal beads formed during the butt fusion process. External Debeading removes external beads after butt fusion joint completion. This process plays a key role in establishing joint integrity and is necessary when undertaking slip-lining or swage lining projects. Poly Welding Specialists undertake both internal and external debeading in accordance with client specifications.

Extrusion Welding

Extrusion Welding is a finishing technique where a bead of molten plastic is used to weld thermoplastic geomembrane materials. The quality of an extrusion weld is dependant on the skills of the welder / operator. Poly Welding Specialists pride ourselves on the expertise and skills of our team of technicians. Extrusion welding is conducted in accordance to ISO 4427-3:2007 Plastics piping systems — Polyethylene (PE) pipes and fittings for water supply —Part 3:Fittings and PIPA Guidelines.

Irrigation Services

Irrigation Poly Welding Specialists have worked on small to large diameter low pressure irrigation mains feed work for agricultural requirements.

Trunkline and Mainline Welding

Poly Welding Specialists conduct HDPE fusion on major pipelines throughout Australia from small bore to 1600mm. We are equipped to do stationary static line welding or mobile track welding.

Pipeline Integrity Assessment and Reporting

Leak Detection. Poly Welding Specialists conduct pipeline integrity inspections on water, sewer and gas mains using highly specialised equipment suitable for each application. Detailed reports are provided to the client as to the findings.

Weld Testing

HDPE Test Welds are carried out at a NATA approved laboratory. The tests welds form a part of Poly Welding Specialists’ ITP’s and Quality procedures.


Poly Welding Specialists perform slurry line work and dewatering.

Pressure and Gravity Sewer Welding

Poly Welding Specialists fuse new mains and upgrade existing mains including the installation of valves, washout pits, scour valves and flow metres. Internal debeading is carried out on gravity sewer.

Rail Works Electrical & Communications Conduits

Poly Welding Specialists are currently engaged to work on the level crossing removal sites across Victoria where we are assisting in the upgrade of electrical and communication conduits (poly). Our team are fully compliant and inducted to work on the rail (level crossing removal projects) throughout Victoria.

Storm Water Harvesting

Poly Welding Specialists have undertaken works on a variety of storm water harvesting projects throughout Victoria.

Industrial Plumbing

Poly Welding Specialists have undertaken works on a variety of complex industrial plumbing projects throughout Victoria including mains install and mains upgrades.

Fire Services

Poly Welding Specialists has been involved in the construction of major fire ring mains on new commercial building sites. We have also been involved in the construction of indoor wall and roof mounted fire mains.

Fabrication Services

Fabrication and Extrusion Welding ranging from 90mm – 630mm