Arctic region; Construction; Offshore; Pipeline When the slot cut through sea ice during winter construction of an Arctic offshore ... the geometry of fabricating offset bends, sloping scraper traps, connections, and direction changes common to all ... Efficiency; Flow; Maintenance; Pigging; Pipeline; Testing According to a survey of 25 major U.S. transmission ... A.G.A. Cat. No. XY0185, 1985 (300pp.). Order from the American Gas Association, 1515 Wilson Blvd., Arlington, VA 22209.