spiral weld carbon steel pipe 1. Grade: Q345B, API X42 - X80, ... , L555, J55, N80 2. Standard: SY/T5037-2000, GB/T Spiral weld carbon steel pipeSSAW (Spirally Submerged Arc Welding) pipes are ... PipeApplication of SSAW Steel PipeThe tubes are mainly used for oil, natural gas, gas, central heating, water supply, sewage treatment, low ...