... Stainless steel seamless pipes are widely used in chemical and petrochemical industry, oil industry, and equipment for foodstuff industry. ... *3.5mm, 108*4mm, 13.7*2.2mmHengli Petrochemical (Dalian) Co.,Ltd.PTA First-period ProjectASTM A312 TP304 Stainless Seamless ... *6.35mm, 762*9.53mm, 864*9.53mm 75MTXianglu Petrochemical Co.,LtdPTA Second-period ProjectASTM A312 TP304 Seamless Stainless Steel Tube ...