Handling And Specifications Of Tubulars
It has come to our attention over recent weeks that problems have occurred with newly welded pipe. In a lot of instances this can be related to lack of detail and understanding when ordering the material. To help overcome this problem the following criteria will be followed by rig personnel:
- All metal pipe is to be made of a long hole surrounded by metal or plastic centered around the hole.
- All pipe is to be hollow throughout the entire length. Do not use holes of different length than the pipe.
- The ID (inside diameter) of all pipes must not exceed the OD (outside diameter), otherwise the hole will be on the outside.
- 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.
- All pipe should be supplied without rust. This can be more readily applied at the job site. NOTE: Some vendors are able to supply pre-rusted pipe, if available in your area, this product is to be recommended, as it will save a great deal of time on the job.
- All pipe over 500 ft (153 m) in length should have the words 'LONG PIPE' clearly painted on each end, so that the contractor will know it is a long pipe.
- Pipe over 2 miles (3.2 km) in length must also have the words 'LONG PIPE' clearly 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 or a short pipe.
- All pipe over 6" (152 mm) in diameter must have the words 'LARGE PIPE' painted on it so the contractor will not mistake it for a small pipe.
- Flanges must be used on all pipes. Flanges must have open holes for the bolts quite separate from the big hole in the middle.
- When ordering 90 deg., 45 deg., or 30 deg. elbows, be sure to specify right or left hand; otherwise you will end up going the wrong way.
- 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.
- All couplings should be either right or left hand treads. But do NOT mix; otherwise as the coupling is being screwed on one pipe, it is unscrewed from the other.