D. P. Fairchild, M. L. Macia, ExxonMobil Upstream Research Co., Houston, TX; N. V. Bangaru, J. Y. Koo, Corporate Strategic Research, ExxonMobil Research and Engineering Company, Anandale, NJ; A. Ozekcin, ExxonMobil Research and Eng., Corp. Strategic Research, Annandale, NJ

Summary: ExxonMobil has developed an X120-grade, high strength pipeline. This paper describes the girth welding development program. The microstructure of the girth weld is called acicular ferrite interspersed in martensite (AFIM). It is capable of yield strengths greater than 120 ksi and fracture toughnesses suitable for service temperatures down to -20°C.