Unformatted text preview: Installation and Welding of Pipe Testing • Excavate trench to depth necessary, using laser level to find rough grade and line. Excavated material should be placed in designated spill pile • Place proper protective system • Place pipe with designated equipment, coordinating placement with operators and workers in the trench • Survey joints to confirm they are at correct location (Note: if using bell and spigot connection, overlap must be correct, as well) • Welding of inside and outside of pipe • After welding passes testing CLSM can be poured • After CLSM sets, backfill should be placed and compacted • Mag Partial Testing checks for errors in welding and fractures • Air testing checks for annular space between each joint • Nuclear density gauge tests for compaction of fill • All testing must be complete and pass specifications before CLSM can be poured • Note: Tests and requirements may vary depending on specifications...
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- Fall '08
- The Work, Electric power transmission, Compact space, Overhead lines