| 摘要 |
A section has a coded identification, preferably a bar code, located closely adjacent each end thereof in a location readable from the interior of the pipe section. Preferably the bar code identification is also readable from the exterior of the pipeline section, either by being applied directly to the exterior of the pipeline section or by being readable through the pipeline section as by being at least partially opaque to X-rays or the like and/or having acoustic properties different from that of the pipeline. The identification may be readable either optically or chemically in some embodiments and preferably includes details of the manufacture of the pipeline section as well as identifying the specific pipeline section. |
