Specifications

. API Oil Tubing and its coupling
1) API Spec 5CT.
2) J55, K55, N80, L80, P110
3) NUE&EUE
4) ISO 9001 quality system

API Oil Tubing

 

API Tubing and its coupling made and checked in the company are in full accordance with API Spec 5CT.In the mean time, the product was authorized to use API Spec 5 CT monogram.

Tubing product specifications.

The kinds of the tubing made in the company are as follows: 2 3/8in, 2 7/8in and 3 1/2in NU and EU tubing of J55, K55,N80 ,L80 and P110 steel grade. After upsetting, the tubing endures full-length heat treatments. The heat treatment procedure is controlled by computers. Tubing production capacity is 100,000 ton per year and the upsetting and heat treatment capacity is30,000 ton per year.

With a perfect management system for tubing quality, the company got ISO9001 quality system certificate from Classification Society of China and got ISO9001 quality system certificate from API.Tubing and its coupling is one of main products to be covered with the quality system. In the mean time, the product was also authorized to use API Spec 5 CT monogram. The product is stable and reliable in quality, characteristic data are in accordance with the requirement of API Spec 5 CT specification for Casing and Tubing and API Std.5B Specification for Machining, Measurement.

Technical specitications

Steel grade	Min. Yield Strength (MPa)	Max. Yield Strength (MPa)	Min.Tensile Strength (MPa)	Size (in)		Connect Strength (N)	OptimumMakeup Torque(N.m)	Min. Makeup Torque (N.m)	Max. Makeup Torque (N.m)
J55	379	552	517	2-3/8	NU	220235	990	740	1240
					EUE	319008	1750	1310	2190
				2-7/8	NU	323012	1420	1070	1780
					EUE	443585	2230	1670	2790
				3-1/2	NU	486742	2010	1500	2510
					EUE	634011	3090	2320	3860
N80	552	758	689	2-3/8	NU	319897	1380	1040	1730
					EUE	464052	2450	1830	3060
				2-7/8	NU	469836	1990	1490	2490
					EUE	645134	3210	2340	3900
				3-1/2	NU	707868	2810	2110	3510
					EUE	921874	4330	3250	5420
P110	758	965	862	2-3/8	NU	440470	1740	1300	2170
					EUE	638016	3080	2310	3850
				2-7/8	NU	646024	2510	1880	3140
					EUE	887170	3940	2960	4930
				3-1/2	NU	973484	3550	2670	4440
					EUE	1268022	5490	4120	6860