ABSTRACT
The procedure involved in the planning and construction of any new pipeline system depends on several factors including the material to be transported by the pipeline, the length of the pipeline, and the environment, etc. Construction of a pipeline with flanged joints involves aligning the to-be-coupled flanges together, placing a rubber gasket between the two flanges to be flanged, tightening the bolts, and welding the flanges to the pipe ends. Prior to transporting the pipe sections to the construction site, both ends of each pipe section should be beveled in the shop using automatic tools. During construction, before welding two abutting pipe sections together in the field, the beveled ends of the pipes to be welded must be thoroughly cleaned of any dirt, rust, mill scale, or solvent. Regular tunneling differs from microtunneling mainly in that the regular tunnel is larger in diameter and hence it enables construction workers and heavy equipment to enter and work in the tunnel.
