OPUS

Soft Water: Galvanized Steel Pipe

Soft water is used in commercial and industrial applications to reduce the build-up of harmful...
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Steel pipe that has been dipped into a molten zinc bath is commonly known as "Hot...
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Benefit of Material to Systems Application

Galvanized pipe is simply carbon steel pipe that has been coated with zinc through a metallurgical process called hot-dip galvanizing. The zinc coating reacts with oxygen and carbon dioxide in the atmosphere to form zinc oxide and zinc carbonate, a dull gray material that provides rust protection for the steel pipe by.  While some code officials call for galvanized piping to be used with water softener applications, others do not allow it.

Galvanized pipe was commonly used for water supply lines many years ago, but over time many were found to have filled with scale. As such, there is little advantage to using galvanized to protect the interior of the pipe.  Its biggest advantage is usage where the surrounding atmosphere would cause uncoated steel pipe to rust.

System Application and Material Usage

Galvanized steel pipe is available in typical sizes of ½" – 12" and is also available in larger sizes where necessary.  Though the mechanical properties of the galvanized pipe make it suitable in soft water systems, some local code officials prefer copper and will now allow galvanized.

Galvanized pipe may be cut or roll grooved for use with grooved mechanical couplings.  It may also be threaded or flanged.  It should be noted that whenever galvanized is cut, as when cut-grooved or threaded, the zinc coating is removed and the corrosion resistance is lost.

Many health hazards are associated with welding of galvanized pipe, therefore welding is not a common joining method and flanges must be threaded onto galvanized pipe or welded onto the pipe prior to it being galvanized. Further, welding burns off the zinc coating, so the welded area will be susceptible to corrosion unless painted or otherwise protected from the environment.

Copper and plastic pipe have largely replaced galvanized piping in current applications.

 

Manufacturers and Suppliers Participating in OPUS

ANVIL International

Anvil International offers a full line of domestically-produced iron fittings, steel nipples,......
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Embassy Group LTD

Embassy Group LTD is a 100-percent member owned, 3.2 billion dollar corporation consisting of......
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F.W. Webb Company

F.W. Webb Company is a multi-faceted distributor of plumbing and heating, HVAC and controls,......
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Ferguson

Ferguson specializes in providing PVF, Plumbing, HVAC and Related Specialty Products and......
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Galloup Company

J.O. Galloup Company is a premier distributor of commercial and industrial piping products,......
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Hajoca Corporation

Founded in 1858, the Hajoca Corporation is the largest privately owned wholesale distributor of......
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Jomar Valve

Founded in 1966 by former Navy Commander Joseph Martin, Jomar Valve set out to change the way......
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MORSCO

MORSCO is a leading U.S. distributor of commercial and residential plumbing, HVAC, and PVF, with......
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Mueller Industries, Inc.

Mueller Industries, Inc. is the leading U.S. manufacturer of copper tube, copper fittings and......
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Victaulic

Victaulic is the world's leading manufacturer of mechanical pipe joining products. For over 80......
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Weldbend Corporation

Weldbend Corporation is a manufacturer of carbon steel welding fittings and forged steel......
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