Reverse Integrity Testing Fast and easy identification of leaking connections.

Pressure containment validation by testing is often required during commissioning or
following plant maintenance. Traditional methods of leak testing large volume pressure
systems may require the extensive use of costly equipment, materials, and specialist labour.

When a pressure system fails a pressure test the leaking connections must be identified, broken, re-worked and reassembled before a successful pressure test can be completed. The inability to easily identify individual leaking connections and the requirement for unplanned remedial work is both costly and time consuming, often delaying plant start up.

By assessing the integrity of individual connections RIGFLEX™ gaskets offer several advantages compared to conventional pressure testing procedures:

  • Fast and easy identification of leaking connections
  • Reduced downtime
  • Reduced test consumables

Featured products for Reverse Integrity Testing

RIGFLEX™ FP, Reverse Integrity Gasket, is designed to suit raised-face flanges (such as those specified in ASME B16.5)
RIGFLEX™ RJ, Reverse Integrity Gasket, is designed to suit ring-grooved flanges (such as those specified in ASME B16.5)

Contact us to learn more about Reverse Integrity Testing and how it can reduce plant downtime and costs.

"The launch of our new RIGFLEX™ range is a moment of pride for Flexitallic, symbolising our unwavering commitment to innovation, efficiency, and safety. Without compromising quality, these cost-effective solutions will positively impact multiple sectors in the coming months and years."

Reverse Integrity Testing FAQs

Reverse integrity testing is a method by which you can prove the integrity or seal tightness of a flange connection without having to pressurise the whole system or a section of pipeline.  This is obtained by pressurising the gasket directly when it’s inside the flange connection.

The RIGFLEX™ reverse integrity gasket works by utilising small annular cavities in the structure of the gasket, which are then pressurised by the use of an external pressurising port.  Once pressurised and then isolated, the pressure is continually monitored for a short period of time to validate the integrity of that flange connection.

Flexitallic manufacture two different types of RIGFLEX™ gaskets.

The RIGFLEX™ FP is based on a tandem kammprofile design, typically using a stainless steel core with Corriculite® sealing face material.

RIGFLEX™ RJ is a metallic ring type joint reverse integrity gasket, which is used in API6A and B16.5 RTJ flanges in high pressure systems within the oil and gas industry.

Flexitallic typically manufacture these in stainless steel 316 or low carbon steel.

Flexitallic do not recommend that gaskets are reused.

Sizes are limited to standard ASME B16.5 flanges ½” through 24” NPS in classes 150 to 1500, and ½” through 12” #2500 flanges.

A number of these standard sizes are available from stock.

RIGFLEX™ gaskets may be available for other flange standards and bespoke/non-standard sizes, please enquire with the Flexitallic Applications Team.

The main advantage of using RIGFLEX™ gaskets is that you can prove the integrity of flange connections without having to undertake a very time consuming, and expensive exercise of pressurising an entire system.

Other benefits include that the gasket can be left in situ for normal service.

The use of Corriculite® sealing material is very important, it’s a new product manufactured by  Flexitallic.

Corriculite® has been developed so that it is fire safe, corrosion mitigating and is suited for cryogenic applications from -200°C up to 250°C,

In addition to fire safety and corrosion mitigation and a wide temperature range, it provides an even tighter seal than traditional sealing products, such as graphite and PTFE.

Flexitallic can provide a full range of test pumps, hoses and connectors. Please speak to your local Flexitallic representative or distributor for further information.

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