Name: API 5CT steel pipe
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API 5CT steel pipe

api5ct oil casing can be divided into seamless steel pipe and welded steel pipe, welded steel pipe mainly refers to the straight seam steel pipe, large caliber oil casing is generally submerged arc welded straight seam steel pipe. The main application countries of this product are mainly distributed in the Middle East, Europe and the United States. api5ct oil casing can be divided into R-1, R-2 and R-3 specifications according to different lengths. The main materials are B, X42, X46, X56, X65, X70 and so on. In the extreme high temperature and high pressure environment, the pipeline made of oil casing material has its own unique natural advantages. api5ct oil casing from raw materials to products before the factory to carry out flattening test, tensile test, impact test, tensile test and other related testing and inspection.

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SPECIFICATION

MATERIAL

PRODUCT DISPLAY

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Sizes of Casing:

Diameter :from 4 1/2 inch to 20 inch （48.26mm - 508mm)

Nominal Weight: from 9.5 lb/ft to 169 lb/ft

from 9.5 ppf to 169 ppf

Lenght: R1, R2, R3

Types of Casing:

Seamless casing

ERW casing

Casing nipple

Casing coupling

Coating：

3PP Coating

3PE Coating

FBE Coating

Epoxy Coating

Special Painting

Casing Size	Casing Coupling	Nominal Weight	Inside Diameter
OD	OD	LB/FT	ID
INCH	INCH	PPF	INCH
4 1/2" (4.500)	5.000"	9.50 lb/ft (ppf)	4.090"
	5.000"	10.50 lb/ft (ppf)	4.052"
	5.000"	11.60 lb/ft (ppf)	4.000"
	5.000"	13.50 lb/ft (ppf)	3.920"
5"	5.563"	11.50 lb/ft (ppf)	4.560"
	5.563"	13.00 lb/ft (ppf)	4.494"
	5.563"	15.00 lb/ft (ppf)	4.408"
	5.563"	18.00 lb/ft (ppf)	4.276"
5 1/2" (5.500)	6.050"	14.00 lb/ft (ppf)	5.012"
	6.050"	15.50 lb/ft (ppf)	4.950"
	6.050"	17.00 lb/ft (ppf)	4.892"
	6.050"	20.00 lb/ft (ppf)	4.778"
	6.050"	23.00 lb/ft (ppf)	4.670"
6 5/8" (6.625)	7.390"	20.00 lb/ft (ppf)	6.049"
	7.390"	24.00 lb/ft (ppf)	5.921"
	7.390"	28.00 lb/ft (ppf)	5.791"
	7.390"	32.00 lb/ft (ppf)	5.675"
7"	7.656"	17.00 lb/ft (ppf)	6.538”
	7.656"	20.00 lb/ft (ppf)	6.456"
	7.656"	23.00 lb/ft (ppf)	6.366"
	7.656"	26.00 lb/ft (ppf)	6.276"
	7.656"	29.00 lb/ft (ppf)	6.184"
	7.656"	32.00 lb/ft (ppf)	6.094"
	7.656"	35.00 lb/ft (ppf)	6.004"
	7.656"	38.00 lb/ft (ppf)	5.920"
7 5/8" (7.625)	8.500“	20.00 lb/ft (ppf)	7.125"
	8.500”	24.00 lb/ft (ppf)	7.025"
	8.500"	26.40 lb/ft (ppf)	6.969"
	8.500"	29.70 lb/ft (ppf)	6.875"
	8.500"	33.70 lb/ft (ppf)	6.765"
	8.500"	39.00 lb/ft (ppf)	6.625"
8 5/8" (8.625)	9.625"	24.00 lb/ft (ppf)	8.097
	9.625"	28.00 lb/ft (ppf)	8.017"
	9.625"	32.00 lb/ft (ppf)	7.921"
	9.625"	36.00 lb/ft (ppf)	7.825"
	9.625"	40.00 lb/ft (ppf)	7.725"
	9.625"	44.00 lb/ft (ppf)	7.625"
	9.625"	49.00 lb/ft (ppf)	7.511"
9 5/8" (9.625)	10.625"	29.30 lb/ft (ppf)	9.063"
	10.625”	32.30 lb/ft (ppf)	9.001"
	10.625“	36.00 lb/ft (ppf)	8.921"
	10.625“	40.00 lb/ft (ppf)	8.835“
	10.625”	43.50 lb/ft (ppf)	8.755”
	10.625	47.00 lb/ft (ppf)	9.681”
	10.625	53.50 lb/ft (ppf)	8.835"
10 3/4" (10.750)	11.75	32.75 lb/ft (ppf)	10.192"
	11.750”	40.50 lb/ft (ppf)	10.050“
	11.750“	45.50 lb/ft (ppf)	9.950”
	11.750”	51.00 lb/ft (ppf)	9.850”
	11.750“	55.50 lb/ft (ppf)	9.760“
	11.750”	60.70 lb/ft (ppf)	9.660”
	11.750“	65.70 lb/ft (ppf)	9.560“
11 3/4" (11.750)	12.750”	42.00 lb/ft (ppf)	11.084”
	12.750“	47.00 lb/ft (ppf)	11.000“
	12.750”	54.00 lb/ft (ppf)	10.880”
	12.750“	60.00 lb/ft (ppf)	10.772“
13 3/8" (13.375)	14.375"	48.00 lb/ft (ppf)	12.715”
	14.375"	54.50 lb/ft (ppf)	12.615“
	14.375"	61.00 lb/ft (ppf)	12.515”
	14.375"	68.00 lb/ft (ppf)	12.415“
	14.375"	72.00 lb/ft (ppf)	12.347"
16"	17.000"	65.00 lb/ft (ppf)	15.250"
	17.000"	75.00 lb/ft (ppf)	15.124"
	17.000"	84.00 lb/ft (ppf)	15.010"
18 5/8" (13.375)	20.000"	87.50 lb/ft (ppf)	17.755"
20"	21.000"	94.00 lb/ft (ppf)	19.124"
	21.000"	106.50 lb/ft (ppf)	19.000"
	21.000"	133.00 lb/ft (ppf)	18.730"
	21.000"	169.00 lb/ft (ppf)	18.376"

Standard	Grade	Chemical compositions（％）
API SPEC 5CT	J55	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
	K55	0.34～0.39	0.20～0.35	1.25～1.50	≤0.020	≤0.015	≤0.15	≤0.20	≤0.20	/	/
	N80	0.34～0.38	0.20～0.35	1.45～1.70	≤0.020	≤0.015	≤0.15	/	/	/	0.11～0.16
	L80	0.15～0.22	≤1.00	0.25～1.00	≤0.020	≤0.010	12.0～14.0	≤0.20	≤0.20	/	/
	P110	0.26～0.395	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

Mechanical properties of casing pipe

Grade	Type	Total elongation under load (%)	Yield strength (min)	Yield strength (max)	Tensile strength min Mpa	Hardness Max (HRC)	Hardness Max(HBW)
J55	-	0.5	379	552	517	-	-
K55	-	0.5	379	552	655	-	-
N80	1	0.5	552	758	689	-	-
N80	Q	0.5	552	758	689	-	-
L80	1	0.5	552	655	655	23	241
L80	9Cr	0.5	552	655	655	23	241
L80	13Cr	0.5	552	655	655	23	241
C90	-	0.5	621	724	689	25.4	255
C95	-	0.5	655	758	724	-	-
T95	-	0.5	655	758	724	25.4	255
P110	-	0.6	758	965	862	-	-
Q125	All	0.65	862	1034	931	-	-