NORFOLK BROADS BOAT PIPE SPECIFICATIONS
1. All pipes are to be made of a long hole surrounded by metal or plastic, centered on the hole.
2. The pipe is to be hollow throughout the entire length – do not use holes that are longer than the pipe.
3. The I.D. ( inner diameter ) is not to exceed the O.D. ( outer diameter ) otherwise the hole will be on the outside.
4. All pipes must be supplied with nothing in the hole, in order that water, diesel, gas, or other stuff can be put inside at a later stage.
5. All pipes should be supplied without rust, as this can be more readily supplied on the boat. Note: Some vendors are now able to supply pre-rusted pipes. This method has been extensively tested and researched by Norfolk contractors and is highly recommended as it will save a great deal of time on the boat.
6. All pipes over 500cm in length should have the words “Long Pipe” clearly marked on each side and end, so the contractor will know it’s a long pipe.
7. Pipe over 3m in length must also have the words “Long Pipe” marked in the middle, so that the contractor will not have to look the entire length of the pipe to determine if the pipe is long or short.
8. All pipes over 20mm in diameter must have the words “Large Pipe” marked on it, so the contractor will not mistake it for a small pipe.
9. Flanges must be used on all pipes. Flanges must have holes for bolts, quite separate from the big hole in the middle.
10. When ordering 90° or 30° elbows, be sure to specify left or right handed, or you will end up going the wrong way.
11. Be sure to specify level, uphill, or downhill pipe. If downhill pipe is used for uphill, the liquid will flow the wrong way.
12. All couplings should either have left or right hand threads. Do not mix threads; otherwise, as the coupling is being screwed on to the pipe, it is being unscrewed from the other end.
13. All pipes under 3mm are uneconomical to use, as they require many joints. They are generally known as washers.
14. Joints in pipes for carrying water must be watertight. Those pipes carrying gas however, must only be airtight.