A discussion started in I would try not to mix them just to be on the safer side. Was this answer helpful? | NO, Are you still looking for the right answer? Hey guys I am Aamir , I am new to plumbing and I needed to know if malleable iron fittings can be used with steel pipes for natural gas supply as per IFGC code. As with all hot-dip galvanized steel exposed to the atmosphere, the coating's time to first maintenance on the exterior of the storage tank can be estimated using the Time to First Maintenance Chart. Required fields are marked *, thePlumber.com © 2020 About The concerns arise from zinc corrosion products that cause particulates to accumulate in the bottom of the fuel tank. As always, the exterior of the tank will benefit from the superior atmospheric corrosion protection of a hot-dip galvanized coating. However, this problem does not seem to be too alarming and is only noticeable with smaller tanks. When exposed to long-term immersion or vapors, zinc shows little signs of corrosion and is very useful in this application. Hi Geunsu Jung, OK, here is some more unsubstaniated lore: I had heard that impurities in the coal gas or manufactured gas of yesteryears would cause the galvanizing to flake. Zinc is not corroded by refined oils, but sulfur or water in ordinary fuel oils form the relatively voluminous zinc corrosion products (particulate) that can clog up small openings. Our plumber said there is no problem using the galvanized fitting, either alone or in combination with the iron fitting. When it was invented, galvanized pipe was an alternative to lead pipe for water supply lines. Q. ©1995-2020 finishing.com, Inc., Pine Beach, NJ - About finishing.com - Privacy Policy The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful. Thanks for pointing out that plumbers usually use black pipe because it costs less, and they are perfect when gas is going to pass through it. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. "popup": { Consult'g, Train'g, SoftwareEnvironmental Compliance. It could be anybodys guess when it comes to galvanized pipe being allowed now. Check your local ordinances. new LazyLoad({ This was generally due to the poor quality of galvanizing. The information provided herein is not intended as a representation or warranty on the part of the AGA. A. Terms of Use • "button": { In some areas plastic pipe is allowed underground (with electric wire above it to allow for locating of that plastic gas pipe as well as warning tape above that pipe as well). If this is the case, voluminous corrosion products will form and create problems when used in some fuel systems. Imagine using galvanized for both gas and water in the same house? & Install'nChemicals & Consumables First of all you need to understand the difference between black iron pipe and galvanized pipe. Today using galvanized pipe generally presents no threat. Search, Home » An exception: in hydrated fuels or fuels with water contamination, corrosion of the zinc will be rapid. Yet a plumber friend claims the mix is ok. A. I guess we will have these pipes installed in our dream home to ensure that we will have heating working well in the long run. The flaking off of galvanizing was caused by other gases such as coal tar gas which was “manufactured gas” not natural. The exterior of a large storage tank will be protected by hot-dip galvanizing the same as any other atmospherically exposed galvanized steel. When large tanks typical of what is used in practice are used, the clogging problem becomes negligible. This is due to the weight of the particulates. Galvanized CS pipe used downstream of foam chamber will not technically acceptable as it will face Hydrocarbon at room temperature. That could present a problem in people distinguishing which pipes are carrying what. Plumbers tend to use black pipe with gas for two main reasons. Your email address will not be published. For this reason, galvanized steel works best with a duplex system when it is used for the storage of gasoline. In the old days, sometimes after a long time. While it does its job pretty well, over time, it still does corrode. When exposed to long-term immersion or vapors, zinc shows little signs of corrosion and is very useful in this application. I just researched now because my husband and I are near our goal regarding the money we need to have our dream house constructed. The corrosion rates will be predictable based on the environment of exposure and service life will span several decades.
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