API Seamless Casing Pipe J55 K55 N80 L80 C90 T95 P110 Q125

• Customization: Available
• After-sales Service: 1-3 Years
• Warranty: 1-3 Years
• Model NO.: Customizable
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Antiseptical
• Usage: Pipeline Transport, Oil/Gas Drilling, Chemical Industry, Mining
• Section Shape: Orbicular
• Standard: ASTM, GB, API
• Diameter: Customizable
• Cross-Section Shape: Orbicular
• Connection Type: Pipe Hoop
• by Technology: Hot Rolling
• Delivery Time: 15-21 Days
• Standardize: Customized Size
• Terms of The Transaction: Fob CFR CIF
• Transport Package: Standard Export Package
• Origin: Cangzhou City, Hebei Province
• Production Capacity: 1500 Tons/Month

Product Description

API Petroleum Casing

The API petroleum casing adheres to the API5L standards set by the American Petroleum Institute. This standard is the benchmark for petroleum casing exports, giving it the name API petroleum casing. These casings, according to material classification, include K55, J55, N80, and P110 grades. Buckle types are a critical feature, with short round buckle (STC), long round buckle (LTC), and partial trapezoidal (BTC) being the most prominent, alongside airtight and threaded buckles. North China is a key production hub for these casings, which come in both seamless and welded varieties. Seamless pipes, though more expensive, offer superior mechanical properties compared to welded pipes and ordinary carbon steel pipes, making them ideal for oil drilling applications. Our primary markets encompass Southeast Asia, East Asia, the Middle East, West Asia, and Latin America.


1. Specification range: Outer diameter: 42.16mm to 510.0mm
3.56MM-16MM
2. Material: H40, J55, K55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr,
P110, Q125, etc.
3. Standard: API 5CT, GB, ISO11960, GOST.
4. Threaded connection: NU, EU, IJ
5. Length: R1, R2, R3
6. Testing: Complies with API 5CT and 5B non-destructive testing and other related regulations
7. Type: Seamless pipe

Detailed photos:

MechanicProperty:

standard	model number	tensile strength (MPa)	yield strength (MPa)	durometer
API SPEC 5CT	J55	≥517	379~552
	K55	≥517	≥655
	N80	≥689	552~758
	L80(13Cr)	≥655	552~655	≤241HB
	P110	≥862	758~965

Chemical composition:

standard

model number

chemical composition (%)

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

Als

API SPEC 5CT

J55K55 (37Mn5)

0.34~0.39

0.20~0.35

1.25~1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

/

/

≤0.020

N80 (36 Mn2V)

0.34~0.38

0.20~0.35

1.45~1.70

≤0.020

≤0.015

≤0.15

/

/

/

0.11~0.16

≤0.020

L80(13Cr)

0.15~0.22

≤1.00

0.25~1.00

≤0.020

≤0.010

12.0~14.0

≤0.20

≤0.20

/

/

≤0.020

P110 (30CrMo)

0.26~0.35

0.17~0.37

0.40~0.70

≤0.020

≤0.010

0.80~1.10

≤0.20

≤0.20

0.15~0.25

≤0.08

≤0.020

Length range:

lengths
project	range 1	range 2	range 3
oil pipe	6.10-7.32m	8.53-9.75m	-
casing	4.88-7.62m	7.62-10.36m	10.36-14.63m

Description:Oil pipeline
Standard: API SPEC 5CT, API SPEC 5B, ISO 11960
Uses: Tubing is employed in the extraction of oil or gas from wells.
Oil pipe Specifications:

Size code	Weight Code		outer diameter		Thickness		End machining form
							Steel grade
	unthickened	thickened	in	mm	in	mm	J55	L80-1	N80	C90	T95	P110
1.900"	2.40	-	1.900	48.26	0.125	3.18	PI	-	-	-	-	-
	2.75	2.90	1.900	48.26	0.145	3.68	PNUI	PNUI	PNUI	PNUI	PNUI	-
	3.65	-	1.900	48.26	0.200	5.08	PU	PU	PU	PU	PU	PU
2 3/8"	4.00	-	2.375	60.32	0.167	4.24	PN	PN	PN	PN	PN	-
	4.00	4.70	2.375	60.32	0.190	4.83	PNU	PNU	PNU	PNU	PNU	-
	5.80	5.95	2.375	60.32	0.254	6.45	-	PNU	PNU	PNU	PNU	PNU
	6.60	-	2.375	60.32	0.259	7.49	-	P	-	P	P	PNU
	7.35	7.45	2.375	60.32	0.336	8.53	-	PU	-	PU	PU	-
2 7/8"	6.40	6.50	2.875	73.02	0.217	5.51	PNU	PNU	PNU	PNU	PNU	-
	7.80	7.90	2.875	73.02	0.276	7.01	-	PNU	PNU	PNU	PNU	PNU
	8.60	8.70	2.875	73.02	0.308	7.82	-	PNU	PNU	PNU	PNU	PNU
	9.35	9.45	2.875	73.02	0.340	8.64	-	PU	-	PU	PU	PNU
	10.50	-	2.875	73.02	0.392	9.96	-	P	-	P	P	-
	11.50	-	2.875	73.02	0.440	11.18	-	P	-	P	P	-
3 1/2"	7.70	-	3.500	88.90	0.216	5.49	PN	PN	PN	PN	PN	-
	9.20	9.30	3.500	88.90	0.254	6.54	PNU	PNU	PNU	PNU	PNU	-
	10.20	-	3.500	88.90	0.289	7.34	PN	PN	PN	PN	PN	PNU
	12.70	12.95	3.500	88.90	0.375	9.52	-	PNU	PNU	PNU	PNU	-
	14.30	-	3.500	88.90	0.430	10.92	-	P	-	P	P	PNU
	15.50	-	3.500	88.90	0.476	12.00	-	P	-	P	P	-
	17.00	-	3.500	88.90	0.530	13.46	-	P	-	P	P	-
4"	9.50	-	4.000	101.60	0.226	5.74	PN	PN	PN	PN	PN	-
	10.70	11.00	4.000	101.60	0.262	6.65	PU	PU	PU	PU	PU	-
4 1/2"	12.60	12.75	4.500	114.30	0.271	6.88	PNU	PNU	PNU	PNU	PNU	-
	15.20	-	4.500	114.30	0.337	8.56	-	P	-	P	P	-
	17.00	-	4.500	114.30	0.380	9.65	-	P	-	P	P	-
	18.90	-	4.500	114.30	0.430	10.92	-	P	-	P	P	-
	21.50	-	4.500	114.30	0.500	12.70	-	P	-	P	P	-
	23.70	-	4.500	114.30	0.560	14.22		P		P	P	-
	26.10	-	4.500	114.30	0.630	16.00	-	P	-	P	P	-

Note: P - Flat head; N - No thickening; U - External thickening; T&C - Turning thread with coupling; I - Integral joint.

Description:Casing
Standard: API SPEC 5CT, API SPEC 5B, ISO 11960
Casing Specifications:

Size code	Weight code	outer diameter		Thickness		End machining form
						Steel grade
		in	mm	in	mm	J55 K55	L80-1	N80	C90	C95	T95	P110	M65
4 1/2"	9.50	4.500	114.30	0.205	5.21	PS	-	-	-	-	-	-	-
	10.50	4.500	114.30	0.224	5.69	PSB	-	-	-	-	-	-	-
	11.60	4.500	114.30	0.250	6.35	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	13.50	4.500	114.30	0.290	7.37	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	15.10	4.500	114.30	0.337	8.56	-	-	-	-	-	-	PLB	-
5"	11.50	5.000	127.00	0.220	5.59	PS	-	-	-	-	-	-	-
	13.00	5.000	127.00	0.253	7.52	PSLB	-	-	-	-	-	-	-
	15.00	5.000	127.00	0.296	9.19	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	18.00	5.000	127.00	0.362	9.19	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	21.40	5.000	127.00	0.437	11.10	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	23.20	5.000	127.00	0.478	12.14	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	24.10	5.000	127.00	0.500	12.70	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
5 1/2"	14.00	5.500	139.70	0.244	6.20	PS	-	-	-	-	-	-	-
	15.50	5.500	139.70	0.275	6.98	PSLB	-	-	-	-	-	-	-
	17.00	5.500	139.70	0.304	7.72	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	20.00	5.500	139.70	0.361	9.17	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	23.00	5.500	139.70	0.415	10.54	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	26.80	5.500	139.70	0.500	12.70	-	-	-	P	-	P	P	P
	29.70	5.500	139.70	0.562	14.27	-	-	-	P	-	P	P	P
	32.60	5.500	139.70	0.625	15.88	-	-	-	P	-	P	P	P
	35.30	5.500	139.70	0.687	17.45	-	-	-	P	-	P	P	P
	38.00	5.500	139.70	0.750	19.05	-	-	-	P	-	P	P	P
	40.50	5.500	139.70	0.812	20.62	-	-	-	P	-	P	P	P
	43.10	5.500	139.70	0.875	22.22	-	-	-	P	-	P	P	P
6 5/8"	20.00	6.625	168.28	0.288	7.32	PSLB	-	-	-	-	-	-	-
	24.00	6.625	168.28	0.352	8.94	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	28.00	6.625	168.28	0.417	10.59	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	32.00	6.625	168.28	0.475	12.06	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
7"	20.00	7.000	177.80	0.272	6.91	PS	-	-	-	-	-	-	PS
	23.00	7.000	177.80	0.317	8.05	PSLB	PLB	PLB	PLB	PLB	-	-	PLB
	26.00	7.000	177.80	0.362	9.19	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	29.00	7.000	177.80	0.408	10.36	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	32.00	7.000	177.80	0.453	11.51	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	35.00	7.000	177.80	0.498	12.65	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	38.00	7.000	177.80	0.540	13.72	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
7 5/8"	26.40	7.625	193.68	0.328	8.33	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	-
	29.70	7.625	193.68	0.375	9.52	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	33.70	7.625	193.68	0.430	10.92	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	39.00	7.625	193.68	0.500	12.70	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	42.80	7.625	193.68	0.562	14.27	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	45.30	7.625	193.68	0.595	15.11	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	47.10	7.625	193.68	0.625	15.88	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
8 5/8"	24.00	8.625	219.08	0.264	6.71	PS	-	-	-	, -	-	-	-
	28.00	8.625	219.08	0.304	7.72	-	-	-	-	-	-	-	-
	32.00	8.625	219.08	0.352	8.94	PSLB	-	-	-	-	-	-	-
	36.00	8.625	219.08	0.400	10.16	PSLB	PLB	PLB	PLB	PLB	PLB	PLB	-
	40.00	8.625	219.08	0.450	11.43	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	44.00	8.625	219.08	0.500	12.70	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
	49.00	8.625	219.08	0.557	14.15	-	PLB	PLB	PLB	PLB	PLB	PLB	PLB
9 5/8"	32.30	9.625	244.48	0.312	7.92	-	-	-	-	-	-	-	-
	36.00	9.625	244.48	0.352	8.94	PSLB	-	-	-	-	-	-	PSLB
	40.00	9.625	244.48	0.395	10.03	PSLB	PLB	PLB	PLB	PLB	PLB	-	PSLB
	43.50	9.625	244.48	0.435	11.05	-	PLB	PLB	PLB	PLB	PLB	PLB	-
	47.00	9.625	244.48	0.472	11.99	-	PLB	PLB	PLB	PLB	PLB	PLB	-
	53.50	9.625	244.48	0.545	13.84	-	PLB	PLB	PLB	PLB	PLB	PLB	-
	58.40	9.625	244.48	0.595	15.11	-	PLB	PLB	PLB	PLB	PLB	PLB	-
	59.40	9.625	244.48	0.609	15.47	-	-	-	P	-	P	-	-
	64.90	9.625	244.48	0.672	17.07	-	-	-	P	-	P	-	-
	70.30	9.625	244.48	0.734	18.64	-		-	P	-	P	-	-
	75.60	9.625	244.48	0.797	20.24	-	-	-	P	-	P	-	-
10 3/4"	32.75	10.750	273.05	0.279	7.09	-	-	-	-	-	-	-	-
	40.50	10.750	273.05	0.350	8.89	PSB	-	-	-	-	-	-	PSB
	45.50	10.750	273.05	0.400	10.16	PSB	-	-	-	-	-	-	PSB
	51.00	10.750	273.05	0.450	11.43	PSB	PSB	PSB	PSB	PSB	PSB	PSB	PSB
	55.50	10.750	273.05	0.495	12.57	-	PSB	PSB	PSB	PSB	PSB	PSB	PSB
	60.70	10.750	273.05	0.545	13.34	-	-	-	PSB	-	PSB	PSB	-
	65.70	10.750	273.05	0.595	15.11	-	-	-	PSB	-	PSB	PSB	-
	73.20	10.750	273.05	0.672	17.07	-	-		P	-	P	-	-
	79.20	10.750	273.05	0.734	18.64	-	-	-	P	-	P	-	-
	85.30	10.750	273.05	0.797	20.24	-	-	-	P	-	P	-	-
11 3/4"	42.00	11.750	298.45	0.333	8.46	-	-	-	-	-	-	-	-
	47.00	11.750	298.45	0.375	9.53	PSB	-	-	-	-	-	-	PSB
	54.00	11.750	298.45	0.435	11.05	PSB	-	-	-	-	-	-	PSB
	60.00	11.750	298.45	0.489	12.42	PSB	PSB	PSB	PSB	PSB	PSB	PSB	PSB
	65.00	11.750	298.45	0.534	13.56	-	P	P	P	P	P	P	-
	71.0	11.750	298.45	0.582	14.78	-	P	P	P	P	P	P	-
13 3/8"	48.00	13.375	339.72	0.330	8.38	-	-	-	-	-	-	-	-
	54.50	13.375	339.72	0.380	9.65	PSB	-	-	-	-	-	-	PSB
	61.00	13.375	339.72	0.430	10.92	PSB	-	-	-	-	-	-	PSB
	68.00	13.375	339.72	0.480	12.19	PSB	PSB	PSB	PSB	PSB	PSB	PSB	PSB
	72.00	13.375	339.72	0.514	13.06	-	PSB	PSB	PSB	PSB	PSB	PSB	-
16	65.00	-	406.40	-	9.53	-	-	-	-	-	-	-	-
16	75.00	-	406.40	-	11.13	-	-	-	-	-	-	-	-
16	84.00	-	406.40	-	12.57	-	-	-	-	-	-	-	-
16	109.00	-	406.40	-	16.66	-	-	-	-	-	-	-	-
18 5/8"	87.20	-	473.08	-	11.05	-	-	-	-	-	-	-	-
20	94.00	-	508.00	-	11.13	-	-	-	-	-	-	-	-
20	106.50	-	508.00	-	12.70	-	-	-	-	-	-	-	-
20	133.00	-	508.00	-	16.13	-	-	-	-	-	-	-	-

Note: P - Flat end; S - Short round thread; L - Long round thread; B - Bias trapezoidal thread


Cangzhou Sheng'ao Petroleum Specialized Pipe Co., Ltd., founded on September 21, 2018, is strategically located in Cangzhou City, Hebei Province, Mengcun Hui Autonomous County, in the promising new area of Meng Li Road North East. Boasting a robust registered capital of 81.18 million yuan RMB, our expansive business scope encompasses: Deep-sea petroleum drilling equipment manufacturing; specialized petroleum drilling equipment production; fasteners and metal tools fabrication; a wide array of hardware products manufacturing; diverse metal structures and cutting-edge metal cutting processing services. In addition, we excel in the sales of oil drilling special equipment, deep-sea oil drilling apparatus, anticorrosive and thermal insulation materials, and an assortment of building decoration and construction metal products. Our expertise extends to metal surface treatments, heat treatments, and a vast retail portfolio including valves, cocks, pumps, vacuum equipment, fasteners, plastic and rubber goods, high-quality special steel materials, and an array of metal tools and chains. Moreover, we are proficient in the import and export of goods, ensuring a comprehensive market reach. (For projects requiring legal approval, we operate independently with authorized business licenses.)

Enterprise Certificate: