Weld Isolation Testing

Line Isolation & Localized Hydrostatic Weld/Nozzle Testing

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

Furmanite - Innovative since 1920

Leak Sealing process developed leak-sealing-developed_thumb 01/01/1920

Furmanite Leak-Sealing process is Developed The under pressure Leak Sealing process is developed by Eugene Clay Furman at the Newport …

First DIY Leak-Sealing Kit old-furmanite-leak-sealing-equipment 01/01/1924

First DIY Leak-Sealing Kit The first do-it-yourself Leak Sealing kits were developed and marketed by Clay Furman and while they …

Long Standing Relationships Sales-Brochure-1926_thumb 01/01/1926

Long Standing Relationships US customer reference list that includes individual war ships in the US Navy, US steel companies and …

1st Patent is filed in 1927 furmanite-patents1 01/01/1927

1st Patent is filed in 1927 The Furmanite patent for the leak sealing process filed in 1927 was the first …

Furmanite moves Overseas Liverpool-Exibition_thumb 06/01/1927

Furmanite moves Overseas First overseas agents appointed to market the leak Sealing kits including in the United Kingdom and Euro…

Costs of a steam leak Sales-Brochure-1926-pg-8_thumb 06/01/1928

Price List from 1926 Table detailing costs of allowing a steam leak based on $4 per ton for “Long coal”. …

Furmanite is thinking global furmanite-the-skys-the-limit_thumb 01/01/1929

Furmanite is thinking global A brief history of the United Kingdom Company written by A W Forsyth (OBE) in September 1973 …

Technology Development leak-sealing-diagram 11/22/1934

Technology Development Furmanite Expands Engineering on Leak Sealing Technology. Photographs taken from a 1934 sales brochure together with schematics of …

Growing Furmanite purchase-letter_thumb 05/01/1960

Growing Furmanite Letter from the Chairman of Furmanite Engineering based in Birkenhead, England to his lawyer requesting information on a …

New Direction New-Technology_thumb 01/01/1966

New Direction Alan Forsyth, acting as a consultant to Furmanite Engineering (1929) advised the Board to move from selling low …

Never compromise on the high quality Company-History-July-1979_thumb 07/01/1979

Never to compromise on the high quality A brief history of the United Kingdom Furmanite organisation written by Joyce Hainsworth, the …

Best in the business were called NASA---Discovery-Team_thumb 09/01/1988

Best in the business were called Furmanite successfully seals nitrous oxide leakage on the Space Shuttle “Discovery” pre launch September …

Start of Modern Furmanite company-overview 11/22/1991

Start of Modern Furmanite The common shares of Furmanite were acquired by Kaneb Inc on 24th January 1991. Furmanite remains …

Acquisition-GSG Division Acquisition-GSG-Division_thumb 01/13/2006

Acquisition of Flow-Serve GSG Division Furmanite as part of Xanser Corporation acquired the General Services Group (GSG) of Flow-Serve corporation …

Corporate Name Change Corporate-Name-Change_thumb 01/13/2007

Corporate Name Change Xanser Corporation (NYSE:XNR) changed the company’s name to Furmanite Corporation, and the company’s shares were traded on …

Acquisition of SLM Acquisition-of-SLM_thumb 04/13/2011

Furmanite Corporation Acquires Self Leveling Machining Technology Furmanite expanded  its global on-site machining capabilities through the acquisition of Self Leveling …


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