For owners and operators of retail gas stations, it is currently difficult to obtain fiberglass-based pipes and fueling system components due to resin shortages, which makes it difficult to obtain vent pipes for underground storage tanks. (UST) device. Since the exhaust pipe is a necessary component in the refueling device because it runs from the UST to the pressure vacuum exhaust port of the system, these shortages hinder the installation of new or upgraded systems.

The exhaust pipe is essential to the operation of the UST system because it allows the canister to vent when its internal pressure or vacuum exceeds a certain point, basically allowing the canister to "breathe." Although the shortage of glass fiber is undoubtedly a trouble, there is a ready-made and proven solution to solve this problem: flexible ventilation ducts.

Trouble-free exhaust pipe OPW offers a range of flexible exhaust pipe sizes and lengths, all of which have been designed and approved to provide many advantages when used with the various engine fuels available in the petroleum market.

The hose has been used in fuel system installations for more than 25 years and is mainly used to provide a connection point between the UST and the fuel dispenser. In addition, in 2004, UL/ULc added the name "Ordinary Ventilation Pipe" to its UL-971 "Safety Standard for Flammable Liquid Non-metal Underground Pipes", making flexible pipes the first choice for fuel system installations to handle liquid products and exhaust gas. application.

The advantages of flexible tubes when used as UST vent pipes are the same as when used in fuel delivery applications:

Compared with other materials used to make ventilation pipes, flexible pipes also have the following advantages:

OPW Retail Fueling, based in Smithfield, North Carolina, launched its FlexWorks product line in 1996. Since then, more than 10 million feet of flexible pipes (listed by UL as exhaust pipes in 2007) have been sold for use in engine fuels, high-mix fuels, enriched fuels, and aviation and marine fuels around the world.

OPW flexible tubing is available in single-wall and double-wall configurations, and is also available in various lengths of reels or 25, 33, and 40-foot flat "rods" with diameters of 1.5, 2 and 3 inches. According to PEI/RP 100-20 "Recommended Practices for Installation", the flat rod configuration helps fuel on-site installers, allowing direct installation of discharge pipes, without inclination or low points-use "the straighter the better" as a guide for underground liquid storage systems . "OPW actually goes one step further than the PEI/RP 100-20 recommendation. It recommends that the exhaust duct slopes 1/4 inch per foot instead of the 1/8 inch per foot recommended by PEI.

The flexible exhaust pipe connection should be made of stainless steel and can be included in the transition chamber or sump, especially if double-walled pipes are required. If there are no stainless steel fittings or transition sump, the joint should be wrapped in Densyl™ tape (also called grease tape or wax tape) to prevent corrosion.

In the 25 years since its creation, OPW has upgraded its FlexWorks flexible pipes, including increased flexibility, requiring less force to bend, making it easier to install; reducing pipe weight to reduce transportation costs; significantly reducing Pipe memory for faster connection and the ability to lay the pipe flat in the trench; and the use of denser and more permeable reinforced Kynar® ADX (PVDF) pipe liner, making it ideal for liquid and vapor exposure choose.

After decades of proving its value as a component of underground fuel delivery systems, flexible pipes are quickly becoming the first choice for vent pipe applications, and the current fiberglass shrinkage is another reason or half that makes flexible vent pipes a reliable alternative to rigid vent pipes. Rigid fiberglass tube.

Visit opwglobal.com to learn more about OPW's flexible duct product portfolio.

This article is sponsored by OPW Retail Refueling

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