LamonsLGC US Asset Holdings, LLC


Patent Pending

All piping gaskets are designed to operate at their optimum on flange faces that are clean, free from scratches and indentations, flat, not distorted and have a gramophone surface finish between 125µ.ins to 250µ.ins. (3.2µ.M to 6.3µ.M).

Flange faces which have been subjected to crevice type corrosion attack at, or around, the inner portion of the flange sealing faces can occur over a period of time. In many field applications, the flange surface condition cannot be assessed until the bolted connection has been decommissioned and an inspection has determined the suitability of the flanges to accept the same type of gasket that was initially installed.

Depending on the extent of the flange face damage, the corroded surface may have extended onto the surface where gasket sealing element is seated and simply installing another gasket offers no guarantee the connection will remain tight and leak-free once the flange is commissioned back into service.

drgApp01An assessment as to the suitabiliity of the flange surfaces has to be made in real-time with several options available:

  • Rebuild and machine the flange surface to a suitable condition.
  • Rebuild and repair the flange using an epoxy based composite material.
  • Replace the damaged flanges.
  • Use the same gasket and "hope for the best".

The Defender™ RG Sealing Gasket has been designed to offer a tight and high integrity sealing solution for use on flange faces that have been subjected to erosion, corrosion, chemical attack and abrasion without having to modify or re-work the flange faces.

drgApp02General Features

  • Can seal corroded flange faces without costly and time consuming flange rehabilitation.
  • Uses proven technology to solve specialized sealing problems.
  • No special tools or installation techniques required.
  • Twin-bolt location tabs allow for easy installation.
  • For flange isolation, contact factory.
  • S316 core is standard. Other steel core options are available upon request.


  • May be used for above ground or subsea applications.
  • High Pressure Flanges: 2500#, API 15K or PN420.


  • 1/2" through 24" diameter.
  • Available as “F” or “S” Type Gaskets.


nsfThe ISOGUARD™ sealing/isolating gasket system is designed for applications where electrical flange isolation and corrosion control are required on pipes containing potable water up to 302°F(150°C). Available for flat face, raised face and ring type joint flanges from 1/2” to 120” (and corresponding API and DN diameters), ANSI 150-1500#, API 2-5K and PN 20-250, the ISOGUARD™ gasket is an engineered value added solution for trouble free operation. The ISOGUARD™ sealing/isolating gasket system consists of a retainer with an incline-plane seal groove geometry and rectangular sealing element “Quad” ring. This design guarantees low bolt load requirements and high sealing reliability. In fact, it´s based on an industry proven design that has been used successfully for over 30 years for a wide variety of applications including sealing volitale fluids in high pressure pipelines.


  • ISOGUARD™ gaskets are engineered to provide high reliability sealing and electrical isolation for potable water applications.
  • High Pressure Flanges: Up To 1500#, API 5K and PN 250.
  • Applications where end users prefer an integral seal element.
  • For ANSI 2500#, API 10K and PN 420 applications, please consult factory.

General Features

  • Self Energizing Seal.
  • Incline-plane groove geometry.
  • Low bolt load required.

Lamons, Houston, Texas, is pleased to announce that effective immediately, Nord-Lock® products can now be purchased at all US locations. Nord-Lock® washers are now stocked in Houston and will be stocked at additional Lamons locations in the near future.

Nord-Lock® offers a safe bolt locking system that does not rely on traditional techniques to secure the fastener. This system utilizes tension instead of friction to secure bolted joints. The proven wedge-locking method, meeting DIN 25201, is superior to any traditional method.

Lamons and Nord-Lock® are available to provide technical assistance for any bolt-locking application. We are also available for on-site product demonstrations and presentations.


For More Information Please Contact:

Walter Voigtman
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tel: 713-222-0284

Lamons is pleased to announce all standard Spiral Wound Gaskets (SWG), CMG, Kammprofile and Corrukamm™ gaskets that are graphite faced will be manufactured with our new Lamons O2i™ oxidation inhibited graphite.

Lamons engineering has worked with our supplier to develop, test and prove out this high grade oxidation inhibited graphite for our standard semi-metallic gasket product offering at no additional cost to the market and our customers. This new material will provide enhanced engineered performance for all applications in the field.

We are not just limiting this to one production facility; Lamons O2i will be used as standard across our global manufacturing plants and local producing branches effective April, 2016. Current stock will be run down over time but if you require our high performance O2i for new orders please contact our sales team to assist with your requests.

o2i100x68Independent testing has confirmed that the average weight loss has improved according to the standard TGA oxidation procedure. (4 hour test period @ 670 Degrees C - media = pure oxygen). Through this Research and Development project we have compared the results of Lamons O2i to other inhibited grades on the market and O2i out performs all. Some samples lost up to 40% in the TGA testing. If you have any questions on this R & D project please contact Robert Taylor, Technical/R&D Manager. (This email address is being protected from spambots. You need JavaScript enabled to view it.)