Brown & Root Industrial Services - - Responsibilities: Assists journeyman level pipefitters in laying out, fabricating, assembling, installing and maintaining piping systems and related equipment.; Selects type and size of pipe and related materials and equipment according to job specifications.; Inspects worksite to determine presence of obstructions.; Plans sequence on installation to avoid obstructions and conflicts with other workers.; Installs and maintains refrigeration and air conditioning systems, including compressors, pumps, meters, pneumatic and hydraulic controls and piping.