Hengyang Hongyuan Pipe Industry Co.,Ltd was founded on 2011, located at Deep-Processing Industrial Zone of Hengyang Steel Tube. We can provide cold drawn, cold rolling and hot expansion seamless steel tubes. We have many certifications: ISO9001:2008, API 5CT, API 5L, CE, ISO14001:2015, EMS, OHSAS 18001:2015, TS certificate, ABS, BV, etc.Our products cover a size range of 20mm-1200mm in OD and 2mm-100mm in thickness. Equipped with 4 hot expansion lines (OD 219-1200, WT 6-100), 2 cold drawn lines (OD 102-830, WT 6-60), 4 cold rolled lines (OD 25-219, WT 3-30) and 1 heat-treatment line.