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(1).Name :Shandong zhongzheng steel pipe manufacturing CO.,LTD
(2). Branch Company:Shandong Zhongli Steel Pipe CO.,LTD
(3).Product : Carbon steel seamless pipes & tubes
(4).Standard : ASTM A106 GRB / ASTM A53 GRB /API 5L GRB / DIN ST52/ST42 /CK45/STPG370
(5).Size : OD from 48mm to 377mm .Thickness from 8mm to 60mm .
For example 60 X 12mm ,89 X 16mm ,114 X 20mm ,127mm x 20mm,168mm x 17mm,194mm X 50mm ,273 X 40mm ,299 X 50mm and so on
(6).Years Of Business :1996
(7).Certificate:API 5L /API 5CT /ISO9000-2011
