Our company is a large seamless steel pipe manufacturer. The following are our leading products:
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%
Length 2 0mm
Product Two:
(1).Product Name : API 5L and 5CT J55 K55 N80
(2). Brand : Zhongzheng Steel Pipe ( By ourself)
(3).Specification: OD 114.3mm - 177.8mm ( 4 1/2'' - 7'' )
The max lengh 12M
(4) Standard: API 5L & 5CT J55 K55 N80
(5) Technics: hot rolled .
Company Name : Shandong Zhongzheng Steel Pipe Manufacturing Co.,Ltd
Address : Liocheng City ShanDong Province China
Chinese website:  http://www.zz-pipe.com/
English website:   http://zz-pipe.en.alibaba.com/