How to Manufacture Column Pipe

Düzgünler Plastik entered the business world in 1975 under the leadership of Ekrem Düzgün and has become one of the industry's undisputed leading companies with nearly half a century of experience.

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Konya Organize San. Bölg. Evrenköy Cd. 3 Nolu Sk. No:14-16 Selçuklu - KONYA

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How to Manufacture Column Pipe

Column Pipe Manufacturing: How Düzgünler Plastik Makes U-PVC Column Pipes in 6 Steps

Column pipe manufacturing takes six steps: preparing the U-PVC compound, extrusion, vacuum sizing and cooling, cutting, threading both ends with square threads, and quality control. Whether a column pipe can safely carry a submersible pump depends on correct wall thickness and a leak-tight threaded joint.

This page explains the column pipe manufacturing process for procurement managers, drilling contractors and engineers, with a focus on projects in Spain and Morocco.

What Are the Steps of Column Pipe Manufacturing?

Raw material: Rigid PVC (U-PVC) resin is blended with additives into a uniform compound.
Extrusion: The compound is melted in the extruder and pushed through a ring-shaped die to form the pipe.
Vacuum sizing and cooling: The hot pipe takes its outside diameter and roundness in a calibration tank, then is cooled with water.
Haul-off and cutting: A haul-off unit pulls the pipe at a steady speed and a cutter trims it to length.
End machining: Both ends receive external square threads, with a coupler joint and an O-ring seat.
Quality control: Dimensions, wall thickness and threads are checked; production follows the ISO 9001 quality management system.

How is the pipe shaped on the extrusion line?

A plastic pipe line includes an extruder, die, calibration tank, cooling tank, haul-off and cutter. Machinery maker Bausano notes that vacuum calibration is the most common sizing method for smooth pipes. Cooling keeps the pipe round as it passes through the haul-off.

Why are square threads and O-rings the critical step in column pipe manufacturing?

A column pipe carries the weight of the pump, motor, cable and water column to the well head. Most of that load acts on the threaded joint. External square threads with couplers make the line easy to assemble and remove at any depth. The O-ring at the end of the thread keeps sand and silt out of the joint.

What Makes Düzgünler Plastik Different in Column Pipe Manufacturing?

First in Türkiye: Düzgünler Plastik was the first company in Türkiye to produce plastic column pipes for submersible pumps.
In-house machinery: The machines on its production lines are designed and developed by its own R&D department.
Capacity: Production takes place on 100,000 m² of open and 30,000 m² of closed area in the Konya 3rd Organized Industrial Zone.
Heritage: Founded in 1975 by Ekrem Düzgün, the company moved into plastic pipe in 1996–1999 and is now led by Ziya and Kemal Düzgün.

Which DCP Column Pipe Model Fits Which Depth?

In column pipe manufacturing, the difference between models comes from wall thickness. All four models are produced in diameters from 42 to 165 mm:

Model	Pressure Class	Max. Pump Head	Typical Use
DCP Medium Plus	15 bar	150 m	General submersible pump systems
DCP Standard Plus	21 bar	210 m	Standard wells and irrigation lines
DCP Heavy	26 bar	260 m	Deep boreholes and intensive pumping
DCP Super Heavy	35 bar	350 m	High load and high pressure

Thin wall vs thick wall: pros and cons

Pro (Medium/Standard Plus): Lighter, easier to ship and install; enough for medium-depth wells.
Con (Medium/Standard Plus): Deep wells with heavy pumps may approach the pressure limit.
Pro (Heavy/Super Heavy): More safety margin under high pressure and heavy pump loads.
Con (Heavy/Super Heavy): Higher weight and cost; unnecessary in shallow wells.

Column Pipe vs Borehole Pipe vs U-PVC Pressure Clean Water Pipe: What Is the Difference?

Product	Role	Düzgünler Options
U-PVC column pipe	Carries the pump, lifts water to the surface	DCP Medium Plus, Standard Plus, Heavy, Super Heavy
U-PVC deep well (borehole) pipe	Lines the well wall, prevents collapse	100, 300 and 500 m depth; plain and screen
U-PVC pressure clean water pipe	Distributes water at the surface	4–16 Atm; push-fit socket, solvent-weld socket, bends

A complete well project uses all three: the borehole pipe protects the well, the column pipe lifts the water and the pressure pipe distributes it.

What Should Buyers in Spain and Morocco Check?

Spain and Morocco both run large groundwater-based irrigation and water supply projects, so column pipe orders often come with a project specification. Check these points before ordering, because the quality of column pipe manufacturing only shows once the line is in the well:

Spain (EU): Since 29 November 2024, Regulation (EU) 2023/923 limits lead in PVC articles placed on the EU market, including imports, to below 0.1% by weight. Ask the manufacturer for a declaration on stabiliser type.
Morocco: Send the project's technical specification with your request, so model, diameter and documents can be matched to the tender.
Both markets: Share pump weight, setting depth, pump outlet size and total length. A model is recommended from these data.
Documents: Ask for the ISO 9001 certificate and dimensional records for the batch.

Frequently Asked Questions - FAQ

What material is used in column pipe manufacturing?

Düzgünler Plastik makes its column pipes from rigid PVC (U-PVC). The material does not rust and does not change the taste of the water.

What does wall thickness decide?

Wall thickness sets the pressure class and the pump head the pipe can handle. That is why the DCP range runs from 15 to 35 bar.

Are column pipes and borehole pipes made on the same line?

Both are extruded, but their sizes, wall thickness and end machining differ. A column pipe carries the pump; a borehole pipe lines the well.

Why square threads?

Square threads help the joint stay secure under heavy load and make it easier to pull and reinstall the line during pump maintenance.

Does Düzgünler Plastik export to Spain and Morocco?

Düzgünler Plastik manufactures in Konya, Türkiye, and supplies buyers abroad. For export terms to Spain or Morocco, contact the company with your project details.