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OIL STORAGE TANKS - home
ABANDONING OIL TANKS
ABOVE GROUND OIL TANK (AST) GUIDE
BURIED OIL TANK (UST) GUIDE
HEATING OIL TYPES & PROPERTIES - home
HOME BUYERS GUIDE TO OIL TANKS
OIL SPILL CLEANUP / PREVENTION
OIL TANK ABANDONING PROCEDURE
OIL TANK INSPECTION & TROUBLESHOOTING
OIL TANK LEAKS & SMELLS
OIL TANK PIPING & PIPING DEFECTS
OIL TANK REGULATIONS
OIL TANK REMOVAL COs
OIL TANK SPILL CLEANUP / PREVENTION
OIL TANK LEAK TEST METHODS
OIL TANK TESTING & REMOVAL COs
OIL TANK WATER CONTAMINATION
Heat tapes used on heating oil piping lines:
How to avoid loss of heat due to heating oil waxing or jelling in cold weather: are heat tapes OK to use on an oil line? Warning about fire hazards traced to some types of heat tapes used on oil lines. Problems with outdoor heating oil storage tanks & loss of building heat.
Beyond the costly problem of leaky oil piping, this document lists other important safety or oil-fired equipment operational defects in home and light commercial heating oil storage and piping systems.
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As we cited at OIL TANK INSPECTION & TROUBLESHOOTING, outside above ground heating oil storage tanks in cold climates are exposed to jelling of the heating fuel. On these systems the oil piping is sometimes fitted with a heating tape in an attempt to avoid freeze-up in the oil line itself. This is a potential fire hazard. Heat tapes should not be used on heating oil lines.
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Similar issues regarding building water entry control are discussed
Readers should also
Safety Recommendation: unless the heating tape is specifically designed for the purpose and is protected against short circuits, do not use electric heat tapes to keep fuel oil lines from plugging during cold weather. Such measures are an obvious fire hazard.
Watch out: as we explain at Heat Tape Guide, some models of heat tapes used for freeze protection can cause a building fire if the tapes are not installed according to the manufacturer's recommendations, particularly if the tape crosses over itself.
Ground fault protection was first required in the 1987 NEC for heat tapes that did not have a metal covering. In 1996/1999 the NEC expanded the requirements for GFCI protection and specified that mobile homes would have at least one heat tape receptacle.
[A significant number of heat tape-related fires occurred in mobile and manufactured homes.]
See FREEZE-PROOF A BUILDING where we describe GFCI protection on heat tape circuits powering heat tapes for manufactured and mobile homes. Similar issues regarding building water entry control are discussed at Sump Pump Inspection.
I am having problems restarting the water heater ever since hurricane irene slammed into New Jersey and my basement flooded. We changed the motor and oil filter, but are having problems getting oil to feed through the lines I was wondering if there were suggestions. - Antoinette
Reply: Guide to How to clear or un-block a clogged heating oil line by CO2 blasting, filter changeout, or oil line replacement
If you are unable to make the line usable following that procedure, and provided we remain convinced that the line is the culprit, I'd have the service company run a new fuel line between the oil tank and the burner.
Also see OIL LINE CLOGGING FIX.
Continue reading at HEATING OIL CLOUD WAX GEL POINT or select a topic from the More Reading links shown below.
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Frequently Asked Questions (FAQs)
Question: How frequently do the copper oil lines leak from corrosion or other factors?
Contractor renovating my basement enclosed the fuel oil line (tank to burner) in the walls. Just after having carpet laid, I was reinstalling baseboards and my nail gun made a perfect nail hole in the hidden piping. About 2 qts. oil all sprayed out. I shut off tank valve and ran furnace to use up oil in lines. It will be a massive clean-up and I don't want to have this happen again.
How frequently do the copper lines leak from corrosion or other factors? What are the options to prevent a future leak? - Judy 4/23/12
Reply: Frequency of Heating Oil Piping Leaks by Leak Location, Type, Source, Cause
Judy, statistics on oil tank leaks are discussed at OIL TANK LEAKS & SMELLS. While those data focus on and report leaks as oil tank leaks, actually some of the leaks reported under the aegis of "oil tanks" may actually occur in the oil supply and return piping (on a two pipe system for buried tanks) or on the oil supply line from an above-ground oil tank.
But I have not found studies, reports, nor statistics on the leak occurrence rate in just heating oil piping itself. In my experience, small leaks in the oil piping system are not uncommon. But as leaks in the supply line lead to faulty oil burner operation, ultimately they lead to a diagnosis and repair. (See the previous Q&A about vacuum tests and pressure tests on oil heat piping and on fuel units respectively.)
Oil Piping Leak Report of 0.005 in New England
At OIL TANK FAILURE RATES we include a section on reports of frequency of heating oil piping leaks. You will see that studies found the leakage rate in New England in the U.S. at about five leaks per thousand customers or less, depending on the sub-area in the study.
Oil Tank Leak Report of 40% with 82% due to Oil Piping in Maryland
In a 1986 study Diane H. Heck found leaks in 40% of petroleum fuel tanks (diesel fuel or kerosene K-1, heating oil, waste oil, and gasoline tanks), (n=240). More accurately she reported a 40% leak occurrence rate in oil storage tank installations, because 82% of those leaks were traced to leaks in oil piping!
Because gasoline tanks were included in this study, several factors may lead readers to think that a higher proportion of leaks occurred in gasoline storage tanks than in heating oil or kerosene storage tanks. But as we report at OIL TANK FAILURE CAUSES that was not the case. Gasoline tanks were responsible for only 26% of all of the leaks found.
Opinion about Probable Percentage of Types of Oil Piping Leaks
My opinion based on field experience repairing heating systems and on field experience as a building inspector of several thousand buildings is that among the leaks that do occur in oil piping systems, they occur in roughly this frequency by type:
At OIL TANK PIPING & PIPING DEFECTS, we catalog the types of leaks that occur in oil piping and where they are found. We also describe steps that can be taken to protect oil piping lines from future damage, including a nail puncture such as your oil piping line suffered.
In the Technical Reviewers & References section below we include additional citations on oil piping leak detection & frequency.
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Technical Reviewers & References