Shandong Zhongzheng Steel pipe Manufacturing CO.,LTD is a large seamless steel pipe manufacturing enterprise . It was founded in 2006 with 600 thousand ton of designed and manufactured and 25 hundred million sales income per year .Shandong zhongli steel pipe CO.,LTD It is my company subordinate enterprises, mainly responsible for international export tradeNow we introduce our product as follows.Product One: (1).Product Name : Seamless Carbon Steel Pipe (2). Brand : Zhongzheng Steel Pipe ( By ourself ) (3).Specification: OD 21.3mm - 355.6mm ( 1/2'' - 14'') (4) Standard ; ASTM A106 GR B , ASTM A53 GR B SAE1020 SAE1045 JIS G4051 S20C JIS G4051 S45C JIS G3454 STPG370 JIS 3454 STPG42 DIN ST 45-8 DIN ST 52 (5) Tolerate: OD +1% / -1% Thickness +12.5% / -10% lengh 13mm Product Two: (1).Product Name : API 5L X42 X52 X60 X70 and 5CT J55 K55 N80 (2). Brand : Zhongzheng Steel Pipe ( OEM BLANT) (3).Specification: OD 60.3mm - 558.8mm ( 2'' - 22'' ) The max lengh 13M (4) Standard API 5L X42 X52 X60 X70& 5CT J55 K55 N80 (5) Technics : hot rolled . (6) Packing : Plastic Caps and mark on the pipeCompany Name : Shandong Zhongzheng Steel Pipe Manufacturing Co.,Ltd Address : Liaocheng City Shandong Province ChinaContact Person : Mr. YangTell : 0086-635-8880099Fax: 0086-635-8882844