Complaint
Tubing
API 5CT oil tubing
1) API Spec 5CT.
2) J55, K55, N80, L80, P110
3) NUE&EUE
4) ISO 9001 quality system ` `
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.
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 is800,000 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 | |||||
Q1:Can I get samples before order ?
A:Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.
Q2:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
Q3:What product information do I need to provide?
A:You need to provide the grade, length, width, diameter, thickness, coating and the number of tons you need to purchase.
Q4:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept third party inspection.
Q5:How do we trust your company?
A:We specialise in steel business for years , headquarter locates in Liaocheng, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO certificate, quality can be guaranteed, the most important point is that we ship enough weight as per the order.
