... field fluid service,spiral submerged arc welded steel pipe Usage: Used for low pressure liquid delivery and ... Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water ISO 21809 Petroleum ... steel pipes and fittings Steel Grade: (Spiral pipe for low pressure field fluid service,spiral submerged ... , St14, St33, St37, St44, ST52 API 5L: A, B, X42, X46, X52, X56, X60, X65 X70 GB/T9711 ...