Can the GCC-xx Series Compression Coupling be used for GAS line repair?

No! The GCC-xx Series Compression Couplings are definitely not suitable for “GAS” applications in terms of combustible gases such as liquid propane (LP) or natural gas (NG). Our GCC series couplings are suitable for water applications to a maximum pressure rating of 150 PSI / maximum temperature rating of 140°F (60°C).

You will see these repair couplings with a WOG rating. However, this is cause of great confusion as the “G” for Gas does not cover combustible gases such as NG or LP applications. The WOG rating has not been a good description and there is movement within the industry to the more descriptive CWP (Cold Working Pressure). Regardless of what it is called, it remains a limitation of the pressure valve or fitting only. The material and trim are different for each application. The pressure and temperature limitations of the pressure containing vessel are a few of the several variables that must be considered.

https://support.boshart.com/what-does-wog-stand-for

“WOG” - General “Non-Shock” pressure rating indicating maximum P.S.I. for the medias Water, Oil or Gaseous. It has traditionally been used as a catch all for ambient temperature fluids, simply defined as water, oil or gas.

“W” The definition of WATER is straightforward – H²O.

The terms oil and gas are less clear and are the cause of major confusion!

“O” We think of OIL as a hydrocarbon (a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon). The majority of hydrocarbons found naturally occur in crude oil, where decomposed organic matter provides an abundance of carbon and hydrogen. However, oils are also made from animal fats and vegetables. In valve selection, oil is a liquid that is thicker than water, has lubricating characteristics, and flows freely.

“G” GAS is meant as a vaporized liquid. Gas can be air, hydrogen, nitrogen, oxygen, etc.

WARNING: WOG does NOT cover combustible gases. Valves for natural gas and liquid propane for example must have the required gas approvals from CSA – always make sure to verify and follow the installation codes for your area! W.O.G. rating does not cover FLAMMABLE gases, natural gas (NP) or liquid propane (LP) and there is movement within the industry to use the more descriptive CWP (Cold Working Pressure) terminology. Regardless of what it is called, it remains a limitation of the pressure valve or fitting only. The material and trim are different for each application. The pressure and temperature limitations of the pressure containing vessel are a few of the several variables that must be considered.

The real meaning of WOG remains “ambient temperature fluids”.

Possible solution for GAS service:

If you need a repair coupling for “Gas” application, you may want to research the DRESSER Style 90 Compression Couplings as they are advertised for “Gas Service”.

Boshart is not in a position to say if these DRESSER couplings will be suitable for your project. It is the sole responsibility of the system designer or end user to verify the Dresser Product has all the required GAS certifications and approvals and is approved for the intended application, meeting all the applicable gas, building and plumbing codes for your area. For information pertaining to the product, you must contact the manufacturer (Dresser) directly.