API 5CT standard casing & tubing

Casings are pipes that support wall of oil and gas well and mainly divided into 3 kinds, the surface, protection and production casing. Tubing is a special pipe which is installed in production casing after well cementing to let oil or gas gush to the ground. We can provide not only full size seamless casings and tubing of outside diameters 1.9”~20” specified by API standards, but also provide matching nipples, crossovers, couplings.

The steel grades as below

S.M.Y.S(psi)	API Steel Grade
S.M.Y.S(psi)	Group 1	Group 2	Group 3	Group 4
40,000	H40
55,000	J55,K55
65,000	R65	M65
80,000	N80-1 / N80Q	L80-3Cr / L80-9Cr / L80-13Cr
90,000		C90
95,000		T95
100,000
110,000		C110	P110
125,000				Q125
130,000				V130
140,000				V140
150,000				V150
155,000				V155

API series casing

Size		Grade								Standard
Diameter mm(in)	Thickness mm	H40	J55、K55	M65	L80、C90	N801、N80Q	C90、T95	P110	Q125	Standard
114.3(4 1/2)	5.21	S	S	S						API SPEC 5CT/ISO11960
	5.69		S/B	S/B
	6.35		S/L/B	L/B	L/B	L/B	L/B	L/B
	7.37			L/B	L/B	L/B	L/B	L/B
	8.56							L/B	L/B
127(5)	5.59		S	S
	6.43		S/L/B	S/L/B
	7.52		S/L/B/E	L/B	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E
	9.19			L/B	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E	L/B/E
	11.1			L/B	L/B	L/B	L/B	L/B	L/B
	12.14				L/B	L/B	L/B	L/B	L/B
	12.7				L/B	L/B	L/B	L/B	L/B
139.7(5 1/2)	6.2	S	S	S
	6.98		S/L/B/E	S/L/B
	7.72		S/L/B/E	L/B	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E
	9.17			L/B	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E
	10.54			L/B	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E	S/L/B/E
	12.7
	14.27
	15.88
	17.45
	19.05
	20.62
	22.22
168.28(6 5/8)	7.32	S	S/L/B	S/L/B
	8.94		S/L/B	L/B	S/L/B/E	S/L/B/E	L/B/E	S/L/B/E
	10.59			L/B	S/L/B/E	S/L/B/E	L/B/E	S/L/B/E
	12.06				S/L/B/E	S/L/B/E	L/B/E	S/L/B/E	L/B
177.8(7)	5.87	S
	6.91	S	S	S			L/B/E
	8.05		S/L/B	L/B	S/L/B/E	S/L/B/E	L/B/E
	9.19		S/L/B	L/B	S/L/B/E	S/L/B/E	L/B/E	S/L/B/E
	10.36			L/B	S/L/B/E	S/L/B/E	L/B/E	S/L/B/E
	11.51			L/B	S/L/B/E	S/L/B/E	L/B/E	S/L/B/E
	12.65				S/L/B/E	S/L/B/E	L/B/E	S/L/B/E	S/L/B/E
	13.72				S/L/B/E	S/L/B/E	L/B/E	S/L/B/E	S/L/B/E
	15.88
	17.45
	19.05
	20.62
	22.22
193.68(7 5/8)	7.62	S
	8.33		S/L/B	S/L/B	L/B	L/B	L/B/E
	9.52			L/B	L/B	L/B	L/B/E	L/B
	10.92			L/B	L/B	L/B	L/B/E	L/B
	12.7				L/B	L/B	L/B/E	L/B	L/B
	14.27				L/B	L/B	L/B	L/B	L/B
	15.11				L/B	L/B	L/B	L/B	L/B
	15.88				L/B	L/B	L/B	L/B	L/B
	17.45
	19.05
219.08(8 5/8)	6.71		S	S	S
	7.72	S	S/L/B	S
	8.94	S	S/L/B	S/L/B
	10.16			S/L/B	L/B	L/B	L/B/E	L/B
	11.43			L/B	L/B	L/B	L/B/E	L/B
	12.7				L/B	L/B	L/B/E	L/B
	14.15				L/B	L/B	L/B/E	L/B	L/B
244.48(9 5/8)	7.92	S
	8.94	S	S/L/B	S/L/B
	10.03		S/L/B	S/L/B	L/B	L/B	L/B/E	L/B
	11.05			L/B	L/B	L/B	L/B/E	L/B
	11.99			L/B	L/B	L/B	L/B/E	L/B	L/B
	13.84				L/B	L/B	L/B/E	L/B	L/B
	15.11				L/B	L/B	L/B	L/B
	15.47
	17.07
	18.64
	20.24
273.05(10 3/4)	7.09	S
	8.89	S/B	S/B	S/B
	10.16	S/B	S/B	S/B
	11.43	S/B	S/B	S/B	S/B	S/B	S/B/E	S/B
	12.57				S/B	S/B	S/B/E	S/B
	13.84						S/B/E	S/B	S/B
	15.11						S/B	S/B	S/B
	17.07
	18.64
	20.24
298.45(11 3/4)	8.46	S
	9.53		S/B	S/B
	11.05		S/B	S/B
	12.42		S/B	S/B	S/B	S/B	S/B	S/B	S/B
	13.56
	14.78
339.72(13 3/8)	8.38	S
	9.65		S/B	S/B
	10.92		S/B	S/B
	12.19		S/B	S/B	S/B	S/B	S/B	S/B
	13.06				S/B	S/B	S/B	S/B	S/B
406.40（16）	9.53	S
	11.13		S/B	S/B
	12.57		S/B	S/B
	16.66
508(20)	11.13	S/L	S/L/B	S/L/B
	12.7		S/L/B	S/L/B
	16.13		S/L/B

Note: S-STC, L-LTC, B-BTC.

API series tubing

Size		Grade						Standard
Diameter mm(in）	Thickness mm	H40	J55	L80	N801、N80Q	C90、T95	P110	Standard
42.16（1.660）	3.18
	3.56	N/U	N/U	N/U	N/U	N/U
	4.85	U	U	U	U	U	U
48.26（1.900）	3.18							API SPEC 5CT/ISO11960
	3.68	N/U	N/U	N/U	N/U	N/U
	5.08	U	U	U	U	U	U
	6.35
	7.62
60.32（2 3/8）	4.24	U	N	N	N	N
	4.83	N/U	N/U	N/U	N/U	N/U	N/U
	6.45			N/U	N/U	N/U	N/U
	7.49
	8.53			U		U
73.02（2 7/8）	5.51	N/U	N/U	N/U	N/U	N/U	N/U
	7.01			N/U	N/U	N/U	N/U
	7.82			N/U	N/U	N/U	N/U
	8.64			U		U
	9.96
	11.18
88.90（3 1/2）	5.49	U	N	N	N	N
	6.45	N/U	N/U	N/U	N/U	N/U	N/U
	7.34	N	N	N	N	N
	9.52			N/U	N/U	N/U	N/U
	10.92
	12.09
	13.46
101.60（4）	5.74	N	N	N	N	N	N
	6.65	U	U	U	U	U	U
	8.38
	10.54
	12.70
	15.49
114.30（4 1/2）	6.88	N/U	N/U	N/U	N/U	N/U	N/U
	8.56
	9.65
	10.92
	12.70
	14.22
	16.00

Note: N-NU, U-EU.