Hydrotesting

Hydrotesting is a process used to verify the integrity and strength of pipelines, pressure vessels, tanks, and other fluid-containing systems. The system is filled with water (or another incompressible fluid) and pressurized to a level higher than its normal operating pressure to identify leaks, weaknesses, or structural defects.

Hydrotesting ensures the safety, reliability, and compliance of the system with industry standards before it is commissioned or returned to service. It is widely used in industrial, marine, and construction applications to prevent operational failures and maintain long-term system integrity.

Leak testing

Leak testing is the process of detecting and locating leaks in pipelines, tanks, vessels, or other fluid-containing systems to ensure their integrity and safety. Various techniques can be used, including pressure decay, vacuum testing, bubble testing, or electronic/ultrasonic methods, depending on the system and fluid type.

Leak testing helps prevent operational failures, environmental hazards, and safety risks by identifying weak points or defects before the system is commissioned or returned to service. It is commonly applied in industrial, marine, construction, and manufacturing sectors to maintain compliance with industry standards and ensure reliable system performance.

Purging / Inerting

Purging and inerting are processes used to remove or displace unwanted gases, vapors, or oxygen from pipelines, vessels, or confined spaces to ensure safety and maintain process integrity.

• Purging typically involves using an inert or neutral gas (like nitrogen) to flush out hazardous or combustible gases from a system before maintenance, startup, or commissioning.

• Inerting maintains a non-reactive atmosphere inside a system to prevent fire, explosion, or corrosion during operation or storage.

These processes are critical in chemical, petrochemical, oil and gas, and industrial applications to protect personnel, equipment, and the environment while ensuring regulatory compliance and operational reliability.

Pipeline Cleaning (Chemical)

Ontech offers specialised chemical pipeline cleaning services to remove deposits, scale, corrosion products, and other contaminants from pipelines and process systems. Using industry-approved chemical agents and controlled application methods, Ontech ensures thorough cleaning while maintaining the integrity of the pipeline materials.

Our experienced team designs and executes cleaning programs tailored to the specific system, flow requirements, and operational constraints, helping to improve system efficiency, prevent blockages, and extend the service life of pipelines across industrial, commercial, and marine applications.

Pipeline Cleaning (Pigging)

Ontech offers expert pipeline pigging services to clean, maintain, and inspect pipelines efficiently. Using specialised pigs—mechanical devices that travel through the pipeline Ontech removes debris, deposits, scale, and other contaminants, ensuring optimal flow and operational efficiency.

Our team customises pigging programs to suit different pipeline materials, diameters, and operational requirements, helping to prevent blockages, minimise downtime, and extend the service life of pipelines across industrial, commercial, and marine applications.

Dewatering & Air Blowing

We offer specialized dewatering and air blowing services for pipelines, tanks, and process systems. Dewatering removes unwanted water or liquids from pipelines and vessels, while air blowing uses high-pressure air to purge moisture, debris, and contaminants, ensuring clean and dry systems ready for operation.

Our team designs and executes tailored programs using advanced pumps, compressors, and instrumentation, helping to maintain system integrity, prevent corrosion or contamination, and optimize operational efficiency across industrial, commercial, and marine applications.

Filtration & Disinfection

We offer comprehensive filtration and disinfection services for water systems, pipelines, tanks, and process equipment. Our solutions remove suspended solids, impurities, and microbial contaminants, ensuring clean, safe, and compliant water for industrial, commercial, and marine applications.

Using advanced filtration units and proven chemical or UV disinfection techniques, Ontech ensures the integrity of systems while protecting operational efficiency and meeting regulatory standards.

Flange Management

Ontech provides comprehensive flange management services to ensure the integrity, safety, and reliability of bolted flange connections in pipelines, vessels, and process systems. Our services include inspection, torqueing, re-torquing, gasket replacement, and monitoring to prevent leaks and maintain system performance.

With skilled personnel and advanced tools, Ontech delivers precise and efficient flange management solutions, helping to minimise downtime, enhance operational safety, and extend the life of critical piping and equipment systems across industrial, commercial, and marine applications.