Aerial view of a pipe stockyard; a worker in red coveralls walking between giant spiral welded steel pipes

Diyarbakır, Türkiye — Spiral Welded Steel Pipe

Pipelines built to last a century, from southeastern Türkiye. Spiral welded steel pipe from Ø219 to Ø4064 — for water, energy and infrastructure.

Stockyard, aerial view — illustrative

Diameter range — grows as you scroll

From Ø219.1 mm to Ø4064.0 mm — spiral welded steel pipe in more than 40 diameters. Our largest diameter exceeds four metres; every size your project requires, from a single line.

Dibor in Numbers

0 m

Total pipeline laid across twelve documented projects

0+ t/yr

Annual production capacity after the 2024 investment

Completed projects across Türkiye

Production Process

Eleven steps from coil to dispatch

Large-diameter spiral welded steel pipes lined up along the production hall — Production hall — illustrative.

Raw Material Inspection
Hot rolled steel coils undergo dimensional, mechanical and chemical testing. Approved material is labelled and moved to the stockyard.
Coil Slitting and Edge Preparation
Steel coils are slit to the width required by the pipe diameter; strip edges are milled to obtain a clean welding surface.
Spiral Forming and Welding
The prepared strip is formed into a spiral at the required diameter. Inner and outer seams are joined by submerged arc welding (SAW).
EN ISO 3834-2 — welding quality requirements
Online Ultrasonic Inspection
During production, the weld seam and surface are monitored in real time with ultrasonic equipment.
Cutting to Length
Spiral welded pipes are cut to the length required by the project and the applicable standards.
Bevelling
Pipe ends are bevelled to standard to ensure high-quality field welds.
Hydrostatic Testing
Each pipe is pressure tested with water at the specified values to verify resistance to operating pressure.
EN 10224 — pressure testing of water transmission pipes
Radiographic (X-Ray) Testing
Weld seams are examined radioscopically in detail according to customer requirements and applicable standards.
3LPE External Coating
Where specified, the outer surface is blasted to Sa 2½ and coated with fusion-bonded epoxy, copolymer adhesive and extruded polyethylene. The entire surface is scanned with a high-voltage holiday detector.
Liquid Epoxy Internal Lining
For potable water and transmission lines, the pipe bore is lined with liquid-applied epoxy to TS EN 10339. Dry film thickness is measured at multiple points and reported.
Final Inspection and Dispatch
Completed pipes pass final inspection, are marked and dispatched to the stockyard under a barcode tracking system.

Reference Project — 2024, Completed

Kahramanmaraş TOKİ Earthquake Housing Potable Water Project

Aerial view of a pipeline route crossing farmland; spiral welded steel pipes lined along the trench with an excavator — Pipeline route, aerial — illustrative

A total of 65,000 metres of pipeline was laid to supply safe and uninterrupted potable water to the earthquake-resistant housing built by TOKİ in Kahramanmaraş. The project plays a critical role in rebuilding the region's infrastructure and supporting sustainable living conditions.