Detail


Line Isolation & Localized Hydrostatic Weld/Nozzle Testing

Furmanite’s Line Isolation tools promote the welder’s safety by isolating any upstream gases or vapor while welding repairs are affected to the pipe…

State-of-the-art tool designs are developed with built-in safety features and focus on efficiencies for field operations. All our designs are backed by highly-skilled and trained personnel, making Furmanite today’s choice for line isolation and localized hydrostatic testing.

When others say it can’t be done, call on Furmanite to engineer solutions for the most challenging applications. Our unique tool designs, including specialized equipment for external testing of nozzle additions, are revolutionizing the industry.

Furmanite’s Line Isolation tools promote the welder’s safety by isolating any upstream gases or vapor while welding repairs are affected to the pipe. During this process the annular cavity is monitored via the tool’s built-in through-port venting system that allows for any pressures to be evacuated to a safe environment. Furmanite’s Isolation tools can be back pressure rated up to the burst pressure of the pipe and have a minimum standard rating of 25 psi back pressure.

Once welding has completed, the same tool used for the isolation can then be pull forward to center the annular testing cavity on the new weld which provides a mechanism to perform a localized hydrostatic weld test on the new weld. Tool sizes can accommodate pipes ranging from 0.5″ to 120″ and test pressures up to 5,000 psi.

In addition to our internal isolation and weld testing tools, Furmanite also provides external hydrostatic nozzle testing; no longer does a vessel need to be completely filled with water water to perform a traditional hydro-test on nozzle additions. Furmanite’s O.D. Nozzle testers allows for additions to be tested externally in a safe and cost-efficient manner with a minimal amount of water. This approach can save time and money from a shutdown schedule by allowing other craft to work simultaneously inside of the vessel while testing is completed.

Custom Applications

Furmanite can provide engineered solutions to accommodate most any Isolation/Weld testing requirements. From our experienced field technicians to our in-house engineering team, our ability to develop custom tools for unique applications is only one of the many things that separate us from the rest. Special applications include, but are not limited to:

  • Plain End pipe testing using Grip Tight style tools; these tools are industry proven to test service systems up to the burst pressures of the piping systems
  • Entire service system testing including spool pieces
  • Specialty tooling to isolate through valves and hydro test valve welds through the valve body
  • Internal diameter nozzle or flange weld testing using proprietary-designed internal cap with jack bolt type compression device to hold the tool in place
  • Under-the-weld Testing – Specialized applications allow Furmanite to test Flange Weld-Slip On, RFWN, Socket Weld, Lap Joint, Lens Ring, O-Ring,Tech-Lock, Grayloc and Orifice-Type flanges
  • Weld-o-lets on pipe for sample valves
  • Butt welds on pipe-to-pipe welds

Line Isolation and Localized Hydrostatic Weld Testing/Nozzle Testing

One Tool, Two Applications

Standard tool sizes from 0.5” to 36”. We can create custom capabilities up to 120”

Line Isolation:

  • Standard tools are back-pressure rated to 25 psi. Custom tools are rated up to the burst pressure of the pipe
  • Standard tools include locking jaw, locking lug and long-stem designs for various sizing requirements
  • Tool can be utilized as a pressure-rated back-pressure isolation device

Localized Weld Testing:

  • Standard tooling tests pressures to 1,150 psi
  • Custom tooling test pressures to 5,000 psi
  • Localized hydrostatic test uses minimal amounts of water and provides a high degree of accuracy and safety

The Furmanite Advantage

  • Standard tools are built with a multi-schedule design. This unique design produces a smaller footprint and allows for easy installation and removal
  • Wider sealing elements provide the ability to isolate in conditions where the pipe is pitted, corroded, eroded and out of round. These elements allow us to maintain seals on seamed pipe
  • Ability to monitor the annular area of the tool in order to verify isolation
  • Ability to through-port any up-stream gas, vapor or pressures away to a safe environment, as well as purge through the center

Localized Hydrostatic Nozzle Testing

Traditionally, nozzle additions for existing columns, vessels, tanks or liners are tested hydrostatically by filling the entire asset with water and performing an internal hydro – a practice which covers internal pressure and applies tensile hoop stress to the weld. It is supported by the first chapter of the Engineering Handbook.

But the first solution is not the only solution, and Furmanite has looked past the first chapter to focus on external pressure by applying compressive hoop stress to the weld; a process found in chapter two of the Engineering Handbook. This new technology has allowed Furmanite to develop a process that is a safe, efficient and more cost-effective solution for your needs.

Fully supported by the necessary calculations in order to meet the requirements of the most stringent engineering departments and authorized inspectors, Furmanite’s proprietary process allows for the following capabilities:

  • Simultaneous testing of the flange to nozzle weld and the full-penetration weld
  • No confined space entry required, allowing for other crafts to work simultaneously in the area
  • OD Nozzle tester replicates all of the same hydrostatic pressures and stresses of a conventional hydro-test
  • Provides the ability to apply axial load to the full penetration weld
  • Reduces traditional preparation and test times associated with conventional internal hydrostatic test methods
  • Minimal water usage required; reducing disposal costs
  • Standard Outside Diameter nozzle test capabilities include 0.75” thru 36” nozzles or flange to pipe welds at pressures up to2,500 PSIG

Specializing in Custom Applications

Furmanite can provide engineered solutions to accommodate most any Isolation/Weld testing requirements. From our experienced field technicians to our in-house engineering team, our ability to develop custom tools for unique applications is only one of the many things that separate us from the rest. Special applications include, but are not limited to:

  • Plain End pipe testing using Grip Tight style tools. These tools are industry proven to test service systems up to the burst pressures of the piping systems
  • Entire service system testing including spool pieces
  • Specialty tooling to isolate through valves and hydro test valve welds through the valve body
  • Internal diameter nozzle or flange weld testing using priority-designed internal cap with jack bolt type compression device to hold the tool in place
  • Under-the-weld Testing – Specialized applications allow Furmanite to test Flange Weld-Slip On, RFWN, Socket Weld, Lap Joint, Lens Ring, O-Ring,Tech-Lock, Grayloc and Orifice-Type flanges
  • Weld-o-lets on pipe for sample valves
  • Butt welds on pipe-to-pipe welds

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