Dents and other mechanical damage that reduce pipeline strength may not be immediate threats to structural integrity. However, left undetected or unrepaired, even small dents and damage can lead to operational difficulties and pipeline failure.

Dents can also damage both internal and external pipeline coatings, which may result in cracking or corrosion. In addition, dent re-rounding – which occurs when an indenting object is removed and pressure inside the pipeline causes the dent to spring back – is associated with localized stress and strain, which can cause cracking.

TDW uses advanced technology to help Hydrocarbon Processing operators:

  • Detect and characterize dents in order to comply with integrity requirements.
  • Identify interacting threats.
  • Prioritize repairs.
  • Execute dent removal without shutdown.
  • Mitigate defects before failure to avoid costly pipeline incidents.
  • Keep pipeline systems at operating capacity.



In the Hydrocarbon Processing market, where hundreds – or thousands – of employees often work in close quarters, and capital investments may be in the hundreds of millions – or even low billions – of dollars, safe pipeline repairs are of utmost importance. TDW offers safe, proven hot tapping and plugging (HT&P) solutions for a wide array of pipeline defects and maintenance challenges from dents to corrosion to valve failure.

TDW technicians, who have the necessary certifications to work in refineries and industrial facilities, ensure the work is done efficiently with minimal interruption to product flow. In fact, even refineries that prefer to handle repairs themselves have been known to turn to TDW for their most critical pipeline repairs.

The HT&P process incorporates a low pressure pipeline fitting, valve, tapping machine, and isolation equipment – all working together to provide a safe and proven isolation solution. Once the area of pipeline that needs work has been safely isolated and evacuated, the line modification can be performed. 

TDW isolation technology plays a critical role in this process, and a temporary bypass allows work to be performed without the need to stop product flow. The TDW STOPPLE® Train isolation system, for example, uses double block and bleed technology to help increase efficiency and safety during pipeline modification. This approach to line isolation, which only requires a single pipeline tap, reduces costs associated with fittings, valves, welding and inspection services. The bleed port affixed on the line ensures that any product that bypasses the first seal is contained and evacuated through the bleed port, which helps operators better protect people and the environment.

Because double block and bleed isolation can play such a significant role in protecting people, the environment, and communities, most petroleum refineries have made this technology mandatory.

Whether operators are purchasing equipment to perform their own HT&P jobs or turn to TDW to execute the service for them, they can rely on the company’s broad line of equipment and consumables. TDW application engineers are recognized industry experts, ready to assist operators through each project phase — from start to finish. To meet regional needs quickly and efficiently, TDW maintains equipment and consumables in service centers around the globe. 

TDW also offers RES-Q® Wrap and Steel Repair Sleeves, quick, simple solutions that allow operators to keep their pipeline operational and within code.

To prepare for future challenges, operators also have the option of creating an Emergency Pipeline Repair System (EPRS), which equips them to take a proactive approach to pipeline emergencies. By working with TDW to create a custom system, operators will have planning and resources in place to repair and recommission their pipelines — and restore product flow — in the shortest time possible.