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WeldedSteelPipe - Installation and Welding of Pipe Testing...

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Construction and Installation of Cement Mortar Lined & Coated Welded Steel Pipe Pre-planning Checklist Obtain all relevant information and drawings and then inspect the proposed work site Determine if the excavation and its protective systems must be designed by an engineer Contact all utility companies (e.g. electricity, phone, gas, sewerage/water) and identify any existing services on or near the proposed work site Locate and flag overhead power lines on or near the work site to be avoided by equipment. Create an emergency and non-entry rescue plan. Discuss the emergency and non-entry rescue plan with all team members. Determine the soil type and anticipate what worker protection will be required Predetermine the placement of the spoil. Arrange to have barricades and warning signage delivered to site before work commences. Arrange the delivery to the worksite before work commences of ladders of the correct length (or other equipment) required for correct access/egress into the excavation/trench.
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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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