1.264 Definitions for Pipes [As amended 01 05 06] per
1. All pipes are to be made of a long hole, surrounded by metal, copper or plastic
2. All pipes are to be hollow throughout the entire length – do not use holes of different length than the pipe.
3. The ID (Inside Diameter) of all pipe must not exceed their OD (Outside Diameter) – otherwise the hole would be on the outside.
4. The pipe is supplied with nothing in the hole, so that water, steam or other stuff can be put inside at a later stage.
5. All pipe is to be supplied without rust: this can be more readily on the job site. NOTE: Some vendors are now able to supply pre – rusted pipes. If available in your area, this product is recommended, as it will save a great deal of time on the site.
6. All pipes over 150m in length should have the words “LONG PIPE” clearly painted on each side and end, so that the contractor will know it is a long pipe.
7. Pipe over 3 000m in length must have the words LONG PIPE” painted in the middle so that the contractor will not have to walk the entire length of pipe to determine whether it is a long or short pipe.
8. All pipe over 1.8m in diameter must have the words “LARGE PIPE” painted on it, so that the contractor won’t mistake it for a small pipe.
9. Flanges can be used on pipes. Flanges must have holes for bolts, quite separate from the big holes in the middle.
10. When ordering 90 or 30 degree elbows, be sure to specify left – hand or right – hand, otherwise you will end up going the wrong way.
11. Be sure to specify to your vendor whether you want level, uphill or downhill pipe. If you use downhill pipe for going uphill, the water will flow in the wrong direction.
12. All couplings should have either right – handed or left – handed threads, otherwise, as the coupling is being screwed on to one pipe, it is being unscrewed from the other.
13. All pipes shorter than 3mm are very un–economical in use, requiring many joints. They are generally known as washers.
14. Joints in pipes for water must be watertight. Those pipes for compressed air, however, need only be airtight.
15. Lengths of pipes may be welded or soldered together. This method is not recommended for concrete or earthenware pipes.
16. Other commodities are often confused with pipes. These include Conduit, Tube, Tunnel and Drain. Use only genuine pipes.