What do our Customers get?

Global Support and Experience

  • Furmanite employs more than 500 Leak Sealing Technicians and more than 30 Engineers and Designers globally
  • Furmanite operates a leak sealing service in more than 15 countries (and many more via licensees)
    • Market leader in many of those countries
  • Worldwide presence enables overseas support
    • Major Engineering Centers in the United Kingdom and United States
  • Experience is gained on a global basis and disseminated throughout the group

Furmanite’s Leadership in the Leak Sealing Industry is widely recognized:

  • Key part of ASME Task Group Working on Post Construction Standard for Leak Sealing
    • This work will form part of a future version of the ASME PCC-2 standard
  • Invited to make presentations at conferences and seminars organized by learned bodies such:
    • Institution of Mechanical Engineers
    • Institution of Chemical Engineers

 Some of the process industries we service:

  • Thermal, Hydro and Nuclear Power Generation
  • Refining
  • Chemical
  • Oil and Gas
  • Pharmaceutical
  • Iron and Steel
  • Pulp and Paper
  • Water / Gas Distribution
  • Food Production
  • Power Distribution

 Leaks from pressurized process plant may:

  • Waste energy
  • Damage the environment (pollution)
  • Create a hazard
    • Flammable fluids
    • Toxic fluids
    • Poor visibility
    • Excessive noise
  • Damage the plant
    • Joint Faces
    • Valve Spindles
  • Affect the structural integrity of the plant

Shutting down to repair leaks may cause significant financial losses due to lost production and cause more leaks due to thermal and pressure cycling. Furmanite Leak Sealing services allow repairs to be made without interruption to normal plant operation. No down time, no production losses, a temporary repair, effective until the next scheduled or convenient shutdown / turnaround.

Hierarchy of Leak Sealing Applications

Standard Applications

  • Bolted flange / gasket leaks
  • Leaks from pipes and piping components
  • Leaks from valve glands

Special Applications

  • Specific repair techniques for particular plant components
  • Techniques are known, technicians are trained, procedures exist

Engineered Solutions

  • One-off repair procedures
  • Driven by Furmanite engineers

Defect types and failure mechanisms addressed:

  • Local wall thinning, pitting, blisters, pinholes, etc.
    • Note that for very extensive wall thinning, composite repair may be the more appropriate repair technique
    • External Corrosion
      • Environmental corrosion
      • Crevice corrosion
      • Galvanic corrosion
      • Corrosion under insulation (CUI) / Under lagging corrosion (ULC)
      • Corrosion under pipe supports
    • Internal Corrosion / Erosion / Erosion assisted Corrosion
      • Leak sealing repair will not prevent further propagation of the defect
      • Full extent of the defect is not obvious and may be much more extensive that it would appear
  •  Cracks
    • Weldments, Heat Affected Zone (HAZ) and Parent Metal
    • Special care is required for the repair of cracks, which have the possibility to propagate very rapidly
      • Longitudinal cracks may propagate beyond the bounds of the repair
      • Circumferential cracks may propagate to cause complete pipe separation inside the repair
  • Mechanical Damage
    • Dents
    • Gouges
    • Note that enclosures over non through-wall defects, will need to filled with hard setting resin or grout, if they are to provide hoop reinforcement to the enclosed pipe
  • Leaks at Gaskets
    • Incorrect gasket selection
    • Incorrect stud pre-load
    • Flange misalignment
    • Gasket seating face defects
  • Leaks at Gland Seals
    • Scored spindles
    • Corroded spindles
    • Loss or hardening of packing material

Safety Issues

Leak Sealing is a potentially hazardous activity.

  • Leak Sealing involves working on live pressurized plant that may contain hot, flammable, explosive and/or toxic fluids
  • Leak Sealing also involves working on pressurized plant that is known to be defective in some way
    • The nature and the extent of the defects are not always be known
  • A cautious and conservative approach is required when assessing the potential hazards and the methods to be employed to mitigate those hazards
    • When considering a leak sealing applications, all the “what if…” questions need to be asked and answered
    • Where reasonable doubt exists, the worst case must be assumed

Flange Fastener Integrity

Factors associated with flange injection and fasteners

  • Injection of compound into the flange void places some additional loads on the flange studs
  • Injection Procedures minimize the additional loads
  • Vessel and piping codes use large safety factors for the determination of stud bolt size and numbers
    • ASME VIII Division 1 and ASME B31.3 uses a design stress based on the lower of 1/4 of specified minimum yield stress and 1/5 of specified minimum tensile strength*
    • Provided that the studs and nuts are in sound condition, a significant overload can be tolerated without risk of failure
  • The condition of the flange studs is critical – especially for re-injection

* These criteria apply to the most common high tensile heat treated bolting material grades such as B7, L7 etc.

On-Line Leak Repair & Sealing

Industrial Leak Repair – Taking the Pressure off You

Pioneering leak-sealing technology and unrivaled on-site service. It’s this unique combination that gives Furmanite the edge and enables you to partner with ‘The Standard’ in leak sealing.

Since 1929, we’ve created groundbreaking and patented industrial leak sealing technology; and we consistently provide these solutions with the highest level of service to customers around the world. We have millions of leak sealing man-hours under our belts and extensive engineering field support facilities with written procedures that conform to all international quality standards. Because of that truly unique expertise, Furmanite has long been the world’s preferred engineering support partner for sealing every type of leak in every industry sector.

Keeping Assets Earning

The priority for every industrial plant is to stay on-line. At Furmanite we help maximize up-time by sealing leaks on-line, on-site and under pressure. This means you keep producing the ‘product’ while we solve your leak problems. You save time, energy and – most importantly – you save money. All this, while simultaneously reducing noise and emission levels, erosion damage, as well as improving plant safety.

On-site Specialists – Whatever the Process or Problem, We can Help

Whether it’s steam, hydrocarbons or gas – including over 300 types of chemical – at temperatures ranging from sub-zero to 1112°F (600°C), and at pressures up to 5,076 psi (350 bar g), Furmanite offers a leak-sealing solution. From low cost banding or peened wire for narrow gap flanges and bonnets to solutions based on ring clamps or engineered enclosures, we’ll offer up the most effective and cost-efficient solution. And if there isn’t an immediate solution, we’ll create one. In fact, almost every leak sealing technique used today was first developed by Furmanite.

Working for a Better Environment

At Furmanite, we take our commitment to protect the environment as seriously and our commitment to the customer:

  • Our solutions maintain the integrity of your process systems.
  • Keeping systems on-line reduce the amount of potentially harmful and polluting fugitive emissions released into the atmosphere.
  • Our goal is to extend the life of your plant components. ‘Repair rather than replace’ enables you to avoid the unnecessary re-manufacturing and replacement of equipment

Products Sealed Worldwide

A very wide variety – including:

  • Steam (most common)
  • Water
  • Oil
  • Natural Gas
  • A wide variety of gaseous and liquid chemicals
    • “Chem-check” manual contains more than 300 entries
    • Acids and alkali’s
    • Solvents, alcohols, ketones, aldehydes
    • Lubricants
    • Heat transfer fluids

Process Conditions


  • Very High (> 300 bar, 4500 psi)
    • Oil, Gas, Water injection systems (offshore oil and gas production)
  • High (> 100 bar, 1500 psi)
    • Steam (HP), power plants
    • Boiler feed water, power plants
  • Moderate
    • Steam (MP), power plants, refining (service)
  • Low
  • Vacuum

Plant Components

Plant components repaired by leak sealing include:

  • Flanges
  • Valves Glands
  • Bolted Valve Bonnets
  • Pressure Seal Bonnets
  • Straight Pipe
  • Elbows
  • Tees
  • Valve Bodies
  • Expansion Joints (bellows)
  • Heat Exchangers
  • Pressure Vessels
  • Nozzles on Vessels
  • Ball Valves
  • Transformers
  • Wellheads
  • Turbines (half joints)
  • Floating Tank Roofs
  • Insulation Joints (electrical)

Design Capability

Furmanite Clamp Design Software is rigorous in its application of the ASME VIII Division 1 Code rules:

  • Automatically determines NDT requirements
  • Automatically determines Post Weld Heat Treatment requirements
  • Automatically determines Notch Toughness (Charpy Impact Test) requirements
    • Parent Metal, Weld Metal and HAZ
  • Rules are programmed for Carbon, Low Alloy, Cr-Mo and Austenitic Stainless Steel
  • Rules are programmed for temperatures from -196°C upwards


111130-Leak Sealing-Sub Sea Clamp

On-Line Leak Sealing

Our leak-sealing technology and unrivaled
on-site service help you maximize asset uptime
by sealing leaks online, onsite and under pressure. This means you keep producing the ‘product’ while we solve your leak problems.

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Process Piping System Hot Tap

Hot Tapping

At Furmanite we carry the largest and most diverse inventory of Hot Tapping equipment
in the world. We have a proven record of developing unique and custom Hot Tap solutions for the most complicated scenarios.

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Line Stopping & Plugging

Our Line Stopping services help prevent unwanted shutdowns and keep critical piping
and pipeline systems online during tie-ins, relocations, repairs, retrofits and routine maintenance.

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111130-On-Site Machining

On-Site Machining

Our portable machining tools deliver the benefits of a fully equipped machine workshop on-site – where our clients need it most. We consistently achieve tolerances and finishes usually only achievable in a machine shop.

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111202-Self Leveling Machines

Self Leveling Machines

Furmanite’s Self Leveling Machines deliver precision on-site machining for large circular and irregular shaped surfaces. Our circular and linear machining equipment is portable and ready for global deployment.

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111130-Composite Repair-Absailing

Composite Repair

Our range of composite repair solutions is designed to ensure the ongoing structural integrity and load-bearing capabilities of your assets, improving their longevity whilst minimizing the impact on your productivity.

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111202-Heat Treatment-3

Post Weld Heat Treatment

Furmanite offers a full range of heat treatment services through a wide range of temperatures. We manufacture, own and operate the most technologically advanced heat treatment equipment available in the marketplace.

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111202-All Services-Steam

All Services

We offer a comprehensive range of on-site
and on-line plant and pipeline maintenance services. From standard applications to highly customized solutions our goal is to help you maximize your asset up time.

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111201-Hot Tapping Machine

Hot Tapping

Furmanite has been manufacturing Hot Tapping equipment for over 50 years. Our Hot Tapping Machines ensure your critical piping systems maintain a continuous flow while installing new tie-ins and branch connections.

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111201-Line Stopping

Line Stopping & Plugging

For over 50 years Furmanite’s Line Plugging equipment has been helping clients maintain a continuous flow on critical piping systems while performing repairs, relocations, valve or pump installations and pipe modifications.

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111201-Pipeline Repair

Pipeline Repair Products

We have a wide range of Pipeline Repair
and Integrity products designed to handle emergency leak repairs in high pressure environments and improve the structural integrity and safety of your pipelines.

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111201-Silk Machine

Portable Machining Tools

Furmanite’s Silk portable and lightweight machine tools provide high tolerance solutions for a variety of problems. Renowned for their sound engineering, our Silk machines help you deliver precision onsite machining.

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Valve Products

The Wilson Snyder Switch Valve has provided proven reliability for over 80 years in Coker Switch Valve applications. Wilson Snyder Switch Valves have the lowest steam consumption in the industry.

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Health & Safety Products

We offer a wide range of proprietary Safety, Environmental and Maintenance products designed to eliminate injuries and improve pipeline safety. At Furmanite, your ongoing safety is our number one priority.

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111201-Smart Shim

Chocking Prevention

Furmanite’s SmartShim™ is a truly effective and state-of-the-art conductor analysis and chocking solution that will ensure your offshore production site remains productive, powerful and profitable.

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111201-Valve Products

All Products

Furmanite has been a trusted resource for sophisticated engineering products for over
75 years. From Hot Tapping to Line Stopping, we have a wide range of products to meet your pipeline repair and maintenance needs.

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Furmanite is a world leader in the provision of on site services to clients in the mining, petro-chemical, off shore, oil & gas, powergen, marine, pulp & paper and general engineering industries globally.

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Case Study: BAE Systems Airbus

To overcome the need to remove the plateaux (part of the wing) to be milled flat for a precise fit, as well as avoiding the risk of distortion when re-fitted to the aircraft.

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Case Study: Esso Fawley Refinery

Esso’s unit 1 boiler at Fawley was shutdown for repair. The unit 2 boiler had developed a superheater tube leak. The challenge was to carry out a repair, the alternative was a shutdown of the major processing units.

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Case Study: Major Operator

The customer wanted to modify their petrochemical plant – but they didn’t want to shutdown.

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Case Study: North Cormorant Platform

The original configuration of pipe-work on the North Cormorant platform of the Otter over Eider project, did not lend itself to the increased flow.

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Case Study: Nuclear Electric

Accurate and reliable valve testing was required in quick time as part of the pre-commissioning process.

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Case Study: Shell Expro Gannet Platform

When Shell United Kingdom Exploration and Production (Expro) introduced a new Induced Gas Floatation Unit (IGFU) onto their Gannet platform they had planned to finalise the installation during a 30-hour shutdown.

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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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