The types of company’s tubing include Grade J55 and Grade N80. Before manufacture,          the advanced spectrometer is applied for conducting material analysis. In the course          of calcinations, the infrared thermometer is used to monitor the heating          temperature. The following steps of tempering, thread processing, detecting          surface, pressure testing and auto-spray painting are completely in accordance with          Quality Control System. So our tubing products hold the firm position in class of tip          top quality.

 

Name		Tubing
Kind		Non-upset tubing			Upset tubing			Special tubing
Size	In	2 3/8	2 7/8	3 1/2	2 3/8	2 7/8	3 1/2	Antiseptic tubing, Reverse thread tubing, Various pup-joint and Small drill pipe, etc.
	mm	60.32	73.02	88.90	60.32	73.02	88.90
Nominal weight	Lb/ft	4.60	6.40	9.20	4.70	6.50	9.30
	Kg/m	6.85	9.52	13.69	6.99	9.67	13.84
Wall thickness	In	0.190	0.217	0.254	0.190	0.217	0.254
	mm	4.83	5.51	6.45	4.83	5.51	6.45
Internal diameter	In	1.994	2.441	2.992	1.994	2.441	2.992
	mm	50.66	62.00	76.00	50.66	62.00	76.00