... -arc Welded) Quality Standard: SAW SSAW: GB/T3091 Welded steel pipe for low pressure liquid delivery GB/T9711 Petroleum and natural ... gas industries--Steel pipe for pipelines SY/T5037 Spiral submerged arc-welded steel pipe for pipelines for low pressure field ... S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44, ST52 API 5L: A, B, X42, X46, X52, X56, X60, X65 ...