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Line Looping and Crossover

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 Liquids Transmission market operators to:

  • Thoroughly clean lines and measure deformities.
  • Assess and address new line requirements.
  • Facilitate line access so modifications can be made without interrupting product flow.
  • Protect people, the environment, and communities throughout the project.
  • Comply with company, industry, and regulatory requirements

STEP 3 / VIEW SOLUTIONS

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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 Liquids Transmission operators select and deploy the appropriate pig for the purpose, pipeline, and product.

Pigs for cleaning:

  • OptionAll™ cleaning pig Effective for cleaning, maintenance, batching, and displacement. Can be customized with attachments appropriate for clearing pipeline solids, including discs, cups, magnets, brushes, and blades.
  • VANTAGE® V cleaning pig – Multi-use pig that can be equipped with brushes to remove hard, crust-like deposits, urethane blades for removing gummy deposits, scraper discs to clean both hard and soft deposits, and magnet kits to remove ferrous material.
  • PitBoss™ cleaning pig – Designed to remove soft to medium-hard deposits from internal pits.
  • FJR/JRN cleaning pig – Equipped with wire brushes and urethane cups to remove contaminants and deposits from pipelines.
  • VANTAGE®+ cleaning pig – Multi-use pig that can remove hard internal pipe deposits such as mill scale, crust, and calcium deposits as well as thick, soft contaminants including sludge and mud.
  • REDSKIN™ foam pig – Available in five different configurations, including the REDSKIN RoughRider® pig for removing hard deposits.
  • WCK cleaning pig – Built to remove pipeline contaminants and deposits, with an outlet port at the pig’s front end to prevent loosened material from piling up. Available in a dual diameter model for cleaning multiple sizes of pipe in one run.
  • Pencil brush cleaning pig – Heavy-duty, aggressive, and effective at removing black powder and cleaning deposits from internal pits. Removable bypass plugs provide jetting action to improve cleaning effectiveness.

Pigs for gauging deformation:

Pigs for liquids displacement:

  • UNISPHERE™ pig – Heavy-duty inflatable sphere that removes liquid hydrocarbons and water from pipelines and piping systems.
  • OptionAll™ batching pig Designed for light cleaning, line filling and dewatering, batch separation, and liquid removal.
  • VANTAGE® V batching pig Used for batching, displacing, and light cleaning.
  • X-Pig® multi-purpose utility tool Flexible and versatile all-urethane pig that can negotiate tight pipeline turns. Appropriate for cleaning, batching, and displacement operations.
  • VANTAGE® + pig – Can be used for batching and displacement. Flexible in tight bend pipelines and can traverse a 20 percent reduction in interior pipe diameter.  

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 Liquids 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 fittingvalvetapping 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.