Pipe Specifications of the Government >1. All pipe is to be made of a long hole, surrounded by metal or plastic >centered around the hole. > >2. All pipe is to be hollow throughout the entire length - do not use holes >of different length than the pipe. > >3. The I.D. (inside diameter) of all pipe must not exceed the O.D. (outside >diameter) - otherwise the hole will be on the outside. > >4. All pipe is to be supplied with nothing in the hole so that water, steam >or other stuff can be put inside at a later date. > >5. All pipe should be supplied without rust - this can be more readily >applied at the job site. > >N.B. Some Vendors are now able to supply pre-rusted pipe. If available in >your area, this product is recommended as it will save a lot of time on the >job site. > >6. All pipe over 500ft (153m) in length should have the words "long pipe" >clearly painted on each end, so the Contractor will know it >is a long pipe. > >7. Pipe over 2 miles (3.2km) in length must have the words "long pipe" >painted in the middle, so the Contractor will not have to walk the entire >length of the pipe to determine whether or not it is a long pipe. > >8. All pipe over 6" (152mm) in diameter must have the words "large pipe" >painted on it, so the Contractor will not mistake it for small pipe. > >9. Flanges must be used on all pipe. Flanges must have holes for bolts quite >separate from the big hole in the middle. > >10. When ordering 90 degrees, 45 degrees or 30 degrees elbow, be sure to >specify right hand or left 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 the wrong way. > >12. All couplings should have either right hand or left hand thread, but do >not mix the threads - otherwise, as the coupling is being screwed on one >pipe, it is unscrewed from the other. > >
