Insulating Flange Joints

Insulating Flange Joints

Barlow monolithic insulating joints for electrical isolation support cathodic protection of natural gas pipelines.

Barlow Insulated Flange Joint

For nearly 60 years, the Barlow Insulated Flange Joint has been the preferred insulating practice for many gas transmission and distribution companies on the east coast. Founded and developed by an engineer in the 1940s, Barlow products were marketed regionally for decades. Barlow Insulating Joints, now part of IMAC Systems product, are now being recognized as a reliable source and are now distributed nationally.

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Electrical Isolation Supports Cathodic Protection

The Barlow flanges are fully assembled, and factory tested before shipping from stock. Having two butt welds allow for the easiest, and safest installation method for electric isolation to maintain cathodic protection. The flanges are also stronger than most alternatives. They are incredibly reliable and long-lasting and have no reported failures.

Why rely on the availability of foreign manufacturers when Barlow monolithic Insulating joints are manufactured domestically, are competitively priced and stocked for most sizes? If supplies become depleted, product availability is 3 – 6 weeks rather than the staggering lead times of European sources.

  • Performance – no reported failures
  • Strong & reliable
  • Nearly 60 years of experience
  • Competitively priced
  • Manufactured in the USA
  • Most sizes stocked
Other Products
  • Insulated Joint Testation® - to monitor electric currents around insulating couplings and joints (See Insulated Flange Joint download)
  • Insulated Flange Joint Arrestor (TMK) - curb the electrical breakdown of insulated flanges
  • Monolithic VSI Weld-In Insulator - Heavy duty insulator easily welded in place 2" – 6" ANSI 300 Class VSI-Monolithic-Insulator.pdf
Insulating Flange Joints / Monolithic Isolating Joints