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#1
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
I have a pinhole in the piece of black iron pipe where the water in
injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric |
#2
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
Ric,
You have not told us enough. First I suspect that this iron pipe is not. It most likely is a special casting. The casting probably is porous and hence the leak. This is not uncommon. You will have to source the casting and buy a new one or you will have to fabricate a replacement. Fabrication will be more expensive. Find out who marinized the engine, locate them on the web and call. If you are not successful, fabrication is your only solution. Steve wrote in message oups.com... I have a pinhole in the piece of black iron pipe where the water in injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric |
#3
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
On Mon, 30 Jul 2007 06:06:26 -0000, "
wrote: I have a pinhole in the piece of black iron pipe where the water in injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric If you are talking about the exhaust elbow, as it sounds you are, probably the easiest way to handle it is to take it off and take it to a good welding shop and have a new one made. Seldom does iron pipe develop a single pinhole leak in normal use, it is usually an indication that there is substantial corrosion inside the pipe. By the way, Nominal Diameter 1 inch pipe has an actual O.D. of 1.315, 3/4" = 1.050 and 1-1/4 = 1.660. Bruce in Bangkok (brucepaigeATgmailDOTcom) |
#4
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
On Mon, 30 Jul 2007 06:06:26 -0000, "
wrote: I have a pinhole in the piece of black iron pipe where the water in injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric A gas pipe fittings supplier. For water, galvanised is allowed in most codes. Brian Whatcott Altus OK |
#5
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
On Jul 30, 1:15 pm, Brian Whatcott wrote:
On Mon, 30 Jul 2007 06:06:26 -0000, " wrote: I have a pinhole in the piece of black iron pipe where the water in injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric A gas pipe fittings supplier. For water, galvanised is allowed in most codes. Brian Whatcott Altus OK It is actually threaded pipe with NPT threads at each end. No cast iron to be seen. Mechanic on the same dock said it was common to see on a universal diesel (marinized Kubota). Just trying to not reinvent the wheel. I think the gas pipe fitting supplier is the next stop.. |
#6
posted to rec.boats.cruising
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Water injection nipple on black iron pipe
Most marine diesel engine distributors will have such parts commonly
available as they are commonly used in 'dry stacks' that are made from black iron pipe. Most Yanmar, etc. dealers simply have retrofit water injection elbows that are made from cast aluminum and are quite easy to retrofit/install onto a black iron pipe 'dry stack' .... and they also offer the fiberglass lagging that you can apply to somewhat insulate the pipe. Usually when you develop a pin hole in one of the pipes in a dry stack, its best to replace the 'whole shebang' (stack and injection elbow, etc) and will only need an exhaust flange outlet adapter that is specific to your engine; plus, new injection elbow ... and will allow you to screw NPT pipe to it. The black iron pipe can be obtained from a hardware store or plumbing supply .... just seal the threads with 'muffler joint compound' from an auto parts store. hope this helps. In article .com, " wrote: I have a pinhole in the piece of black iron pipe where the water in injected in my boats exhaust system. I am trying to find a source for a similar piece of pipe. It is about 1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle. Appears to be galvanized or black iron. Any ideas? Ric |
#7
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Water injection nipple on black iron pipe
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