When a pipeline operator needs to complete a line modification, whether it’s a looping project to increase capacity or establishing crossover connections between new and existing lines, TDW can help.
Looping, for example, calls for placing a segment of pipeline along an existing stretch of pipeline and connecting the new line to the existing pipeline at both ends. The loop is a highly effective method of increasing pipeline capacity, but installing it can be a complex process that requires extensive expertise. TDW offers a full range of solutions for projects like these, including expert services and equipment.
TDW enables Gas Transmission market operators to:
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Because pigs are easy to launch and retrieve, efficient, and effective, they are the preferred tools for a variety of pipeline maintenance and integrity activities related to capacity upgrades and line modifications.
Before completing line looping to increase capacity and operating flexibility, for example, pigging clears the pipeline of materials and debris that can cause corrosion or limit flow, preparing it for optimum productivity. After the new section of line is connected, a gauging pig helps characterize defects in the new lineand provide other essential information about its current condition.
TDW can help Gas Transmission operators select and deploy the appropriate pig for the purpose, pipeline, and product.
Pigs for cleaning:
Pigs for gauging deformation:
Pigs for liquids displacement:
Technical assistance is available from TDW subject matter experts for special circumstances or if the path to a solution requires consultation.
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In the Gas Transmission market, where pipeline shutdown may not be an option, hot tapping and plugging (HT&P) technology allows operators to complete pipeline replacements and modifications – from making lines piggable to line lowering and relocations – with minimal flow interruption. TDW HT&P solutions protect customers’ revenue stream while minimizing risk – and are available for a wide spectrum of pipelines, environments, and products.
The HT&P process incorporates a high pressure fitting, valve, tapping machine, and isolation technology – 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.
The full suite of isolation solutions offered by TDW plays a critical role in this process. The TDW STOPPLE® Train isolation system, for example, uses double block and bleed technology to help increase efficiency and safety during pipeline modification. The system – 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 creates a safe zone in high-consequence areas.
Whether operators are purchasing equipment to perform their own HT&P jobs or turning to TDW to execute the service for them, they can rely on the broad line of TDW equipment and consumables. The company engineers and manufactures nearly every component needed for an HT&P project, and TDW tapping and isolation equipment is considered the industry standard.
TDW can also partner with operators before the work begins, providing consulting services to help them make optimum use of TDW products and services. TDW application engineers are recognized industry experts, ready to assist operators through each project phase – from start to finish.