... Project and Zhongxian-Wuhan Gas Transporting Project. The three-layer PE JYHT80 heat-shrinkable sleeve has been used in ... guideJYHT50, JYHT60, JYHT80 JYHT50, JYHT60, JYHT80 is a three-layer field joint coating system for pipeline operating temperature separately at ... , Coal Tar, Tape & Asphalt.FRD, FRYFRD, FRY is a two-layer field joint coating system for pipeline operating at ambient temperature ...