What is Column pipe? Column pipe is a vertical pipe system used by submersible pumps to transport water from underground sources to the surface. In deep well drilling applications, these pipes maintain the structural integrity of the well while ensuring effective pump operation, serving a wide range of uses from agricultural irrigation systems to municipal water networks. U-PVC column pipes are preferred in the industry for their lightweight structure, corrosion resistance, and longevity compared to traditional steel alternatives.
Proper column pipe selection directly impacts project efficiency. Technical parameters such as pressure values, well depth, pump capacity, and soil conditions play critical roles in determining column pipe type. This article examines the technical specifications, selection criteria, and application methods of column pipes within the framework of TS EN ISO 9001:2015 standards.
KEY TAKEAWAYS
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• Column pipe is a vertical pipe structure used in submersible pump systems for water transport.
• U-PVC column pipes are manufactured in four main pressure classes: DCP Medium Plus, Standard Plus, Heavy, and Super Heavy.
• Square thread connection system and O-ring structure ensure leak-proof sealing between pipe segments.
• Production compliant with TS EN ISO 9001:2015 quality standard guarantees long-lasting use.
• Well depth, pump power, and pressure value are fundamental criteria in column pipe selection.
How is a column pipe is manufactured? Column pipe is a pipe system connected to the submersible pump motor's outlet flange, extending from underground water sources to the surface. U-PVC column pipes manufactured according to ISO 9001 standards are produced from polymer-based raw material using extrusion method.
Düzgünler Plastik's column pipes use a square thread connection system. This system provides 40% higher torque resistance compared to screw-type connections. O-ring seals placed between each pipe segment deliver leak-proof performance under pressures up to 16 atmospheres. Pipe inner diameter must be selected at minimum 10 mm larger than the submersible pump's outer diameter.
In technical definition, column pipe should not be confused with well casing. While well casing provides structural support, column pipe serves only the water transport function.
Column pipe failure can cause the entire deep well system to collapse. A pipe with insufficient pressure resistance cracks during pump operation and leads to water loss.
In agricultural irrigation projects, column pipe malfunction means water supply interruption during planting season. In municipal drinking water networks, where uninterrupted service is required, column pipes must have minimum maintenance needs. While steel column pipes begin rusting within 5-7 years, U-PVC column pipes can serve over 25 years.
In industrial facilities at well depths exceeding 200 meters, column pipe weight increases installation costs. U-PVC column pipes, being 60% lighter than steel alternatives, reduce lifting equipment costs. In construction projects, removable column pipes used for temporary water supply provide reuse advantages.
Column pipe selection is based on the trinity of well depth, pump capacity, and pressure requirement. First, the pump's outer diameter is measured and pipe inner diameter is determined accordingly.
DCP Medium Plus model, suitable for 4-6 atmosphere pressure, is used at well depths up to 100 meters. Standard Plus withstands up to 8 atmospheres and is preferred in applications at 150-meter depth. Heavy class resists up to 10 atmospheres, while Super Heavy handles up to 16 atmospheres. Düzgünler Plastik's classification is a widely accepted reference system in the industry.
Soil type also affects selection. In sandy soils where vibration is high, Heavy model with stronger connection system is recommended. When pump power exceeds 10 horsepower (HP), pipe wall thickness must be minimum 4 mm. Using tension clamps every 20 meters during installation prevents pipe elongation from its own weight.
DCP Medium Plus: 4-6 atm, garden irrigation, small agricultural operations.
DCP Standard Plus: 6-8 atm, medium-scale agricultural irrigation, residential complexes.
DCP Heavy: 8-10 atm, industrial facilities, municipal networks.
DCP Super Heavy: 10-16 atm, deep industrial wells, high flow requirements.
The most common mistake is selecting insufficient pipe inner diameter relative to pump diameter. When pipe diameter is kept narrow, pump efficiency drops up to 30%.
Failure to lubricate O-ring seals during installation increases leakage risk. If excessive tightening is applied to square thread connections, thread grooves crush and connection strength is lost. According to Düzgünler Plastik installation guide, specified torque value must be applied at each connection point using a torque wrench.
Storage conditions are also included in faulty practices. If column pipes are exposed to direct sunlight, material structure deteriorates due to UV effect. According to TS EN 1452 standard, pipes must be stored in shaded areas, horizontally, and isolated from ground contact. Failure to attach protective caps to pipe ends during transportation causes thread structure damage.
In an irrigation system installation example on 200 hectares of agricultural land, drilling was conducted to 180-meter depth. Pump power was calculated as 15 HP with maximum flow rate of 60 m³/hour.
Project team selected Düzgünler Plastik DCP Heavy model column pipe. Pipe inner diameter is 6 inches (152 mm), wall thickness 5 mm. Total 180 meters of pipe was constructed from 6-meter length segments. At each connection point, square thread system jointing was performed, O-ring seals were treated with silicone-based lubricant.
Stainless steel tension clamps were used every 20 meters during installation. When system was commissioned, outlet pressure measured 8.5 atmospheres with no leakage detected. In control inspection conducted 3 years after project completion, no deformation or wear was observed in pipe structure. This application is a reference project implemented in compliance with TS EN ISO 9001:2015 quality management system.
Factors to check before purchasing column pipe are as follows. Pump outer diameter must be measured, pipe inner diameter selected accordingly. Well depth must be determined, total pipe meter requirement calculated. Pressure requirement must be read from pump technical documentation, appropriate DCP model determined. ISO 9001 certificate must be requested, certificate validity verified. Connection type (square thread / O-ring) confirmed, spare seal availability inquired.
| Model | Pressure(atm) | Depth (m) | Application Area |
| Medium Plus | 4-6 | 0-100 | Garden irrigation |
| Standard Plus | 6-8 | 100-150 | Agricultural irr. |
| Heavy | 8-10 | 150-200 | Industrial |
| Super Heavy | 10-16 | 200+ | Deep industrial |
In brief: Pump diameter, well depth, and pressure value are determinative in column pipe selection. U-PVC column pipes are lightweight, corrosion-resistant, and long-lasting compared to steel alternatives. DCP Medium Plus is used up to 100 meters, Standard Plus up to 150 meters, Heavy up to 200 meters, Super Heavy over 200-meter depths. Square thread connection and O-ring system ensure leak-proofing. Düzgünler Plastik manufactures according to ISO 9001 standard.
Well casing is the outer pipe protecting the structural integrity of the well, while column pipe is the inner pipe through which the pump transports water. Well casing supports the ground, column pipe only conducts pressurized water. The two pipes have different functions and are used together.
DCP Medium Plus for depths up to 100 meters, Standard Plus for 100-150 meters, Heavy model recommended above 150 meters. If pump power exceeds 10 HP, Standard Plus or Heavy should be preferred. Heavy model is mandatory if pressure value exceeds 6 atmospheres.
U-PVC column pipes are approximately 60% lighter than steel pipes of the same diameter. A 6-inch diameter, 6-meter length U-PVC pipe weighs 15 kg, while its steel equivalent is around 38 kg. This lightness shortens installation time and reduces labor costs.
Insufficient pipe diameter selection, failure to lubricate O-ring seals, applying excessive tightening torque, and storage in sunlight are the most common mistakes. Torque wrench must be used in installation, specified torque value must be followed at each connection. Pipes must be stored in shaded areas.
ISO 9001 certificate demonstrates that the production process is managed according to standards. This certificate confirms that raw material quality, production control, and final product tests are documented. Column pipes without TS EN ISO 9001:2015 certification cannot guarantee long life.
The design life of U-PVC column pipes exceeds 25 years under proper usage conditions. While steel pipes begin rusting in 5-7 years, U-PVC does not corrode. Pipes manufactured by Düzgünler Plastik according to ISO 9001 standard guarantee this duration under conditions specified in technical documentation.
Pressure class (DCP model), pipe diameter, wall thickness, and total meter quantity determine pricing. Super Heavy model costs 40% more than Medium Plus. However, in deep well applications, correct model selection minimizes long-term maintenance costs.
DCP Medium Plus withstands up to 6 atmospheres, Standard Plus up to 8 atmospheres, Heavy up to 10 atmospheres, Super Heavy up to 16 atmospheres. Pressure value is selected according to pump's maximum outlet pressure.
Connected by screw principle with square thread connection system. O-ring seal is placed at each connection point and tightened to specified torque value using torque wrench.
Vertical pipe system extending from submersible pump motor outlet to surface, transporting pressurized water. It is the water transmission channel between pump and surface.
Pipe with inner diameter minimum 10 mm larger than pump outer diameter is selected. Flow calculation ensures water flow velocity does not exceed 2 m/s.
Polymer-based U-PVC material does not rust as it does not undergo oxidation. There is no corrosion risk since it does not contain metal like steel.
For 100-meter depth, average 4-6 hours with 2-person crew. Time shortens if pipe segments are pre-prepared.
Used in agricultural irrigation, municipal water networks, industrial facilities, construction projects, geothermal energy systems, and mining applications.
Column pipe is an indispensable component of deep well systems. Correct model selection directly affects project efficiency.
U-PVC column pipes are lightweight, corrosion-resistant, and long-lasting compared to steel alternatives. Düzgünler Plastik's DCP Medium Plus, Standard Plus, Heavy, and Super Heavy model range responds to every depth and pressure requirement. Square thread connection system and O-ring structure guarantee leak-proof performance.
Production according to TS EN ISO 9001:2015 quality standard is the foundation of Düzgünler Plastik's industry leadership maintained since 1975. The trinity of pump diameter, well depth, and pressure value are critical parameters of column pipe selection. Torque wrench usage during installation is mandatory for long-lasting system establishment.
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REFERENCES:
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• TS EN ISO 9001:2015 Quality Management Systems Standard
• TS EN 1452 U-PVC Pressure Pipe Systems Technical Specification
• ISO 161-1 Dimension Standards for Thermoplastic Pipes
• Düzgünler Plastik Technical Documentation (2024)
• Turkish Standards Institution (TSE) Publications
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