Seamless steel pipe 
Hunan Nan Great Steel Pipe Co.,Ltd which is as the largest subsidiary  of Hunan shinestar Industrial Corporation located in Hunan ,China .With its Primary operation in steel products manufacturing ,steel products stocking with the world's most modern and technically iron and steel advanced equipment for mining ,coking ,steel-making ,iron-making ,rolling and supporting auxiliary facilities ,and professional research and technical staff .
Hunan Great Steel Pipe Co.,Ltd has a capacity to produce full range and a wide variety of quality seamless steel pipes including structure tube ,liquid pipes boiler tubes hydraulic pillar tube ,casing ,line pipe drill pipe ,petroleum, cracking tubes and welded steel pipes including erw steel pipe ,ssaw steel pipe ,lsaw steel pipe. The steel products are widely used in aviation ,aerospace ,national defense equipment ,oil exploration ,engineering machinery, automobiles, railway rolling stock ,new energy and other industries and fields ,Its exporting markets cover over 100 global main regions and countries with tem million tons Iron and steel capacity .
So far ,Hunan Great Steel Pipe Co.,ltd is the predecessor of branch of China's oil pipeline and gas pipeline science research institute as the most authoritative pipeline engineering research institute, consists of eight backbone institute and line pipe bureau postdoctoral research stations ,oil and gas pipe is "safe" the main body of the national engineering laboratory on units is China technology center and plumbing contractor as well as steel products supplier branch of China welding association director branch pipe welding unit ,and a large number of sophisticated equipment and high-end talent in  pipeline engineering materials ,pipe welding technology piping special tools and pipeline construction technology pipeline corrosion protection technology piping nondestructive testing technology pipeline safety evaluation pipe information standard eight fields a leading domestic level undertake and fulfill the country and provincial key technology research projects more than 200 items has a number of national patent results at home and abroad ,and key pipeline engineering application widely

Size of Steel Pipe Tube	(Unit: mm)
Round tube:	Diameter	Thickness	Diameter	Thickness	Diameter	Thickness	Diameter	Thickness
	Φ14	0. 5-2. 0	Φ25	0. 5-2. 0	Φ38	0. 5-2. 0	Φ60	0. 5-2. 0
	Φ16	0. 5-2. 0	Φ26	0. 5-2. 0	Φ39	0. 5-2. 0	Φ76	0. 5-2. 0
	Φ19	0. 5-2. 0	Φ28	0. 5-2. 0	Φ40	0. 5-2. 0	Φ80	0. 5-2. 0
	Φ20	0. 5-2. 0	Φ30	0. 5-2. 0	Φ42	0. 5-2. 0	Φ88	0. 5-2. 0
	Φ21	0. 5-2. 0	Φ32	0. 5-2. 0	Φ48	0. 5-2. 0	Φ90	0. 5-2. 0
	Φ22	0. 5-2. 0	Φ33	0. 5-2. 0	Φ50	0. 5-2. 0	Φ100	0. 5-2. 0
square pipe:	15*15	0. 5-2. 0	20*20	0. 5-2. 0	30*30	0. 5-2. 0	50*50	0. 5-2. 0
	18*18	0. 5-2. 0	25*25	0. 5-2. 0	40*40	0. 5-2. 0	80*80	0. 5-2. 0
Ellipse tube:	20*40	0. 5-2. 0	25*50	0. 5-2. 0	30*60	0. 5-2. 0	26*70	0. 5-2. 0
Oblate tube:	19(10*20)	0. 5-2. 0	25(15*30)	0. 5-2. 0	30*60	0. 5-2. 0	30*80	0. 5-2. 0
	40*96	0. 5-2. 0
Rectangular tube:	10*20	0. 5-2. 0	15*30	0. 5-2. 0	15*35	0. 5-2. 0	15*50	0. 5-2. 0
	20*30	0. 5-2. 0	20*40	0. 5-2. 0	25*50	0. 5-2. 0	30*60	0. 5-2. 0
	40*80	0. 5-2. 0