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OCTG-Casing Couplings

Publisher:TianchengTime:2018-06-17Number:148

OCTG - Casing Couplings

Standard：API 5CT, API 5B
Steel Grade：J55,K55,N80,L80
Size Range：OD:76~180
Delivery Condition：API 5CT Specification
Surface Quality：API 5CT Specification
Delivery Time：30 days
Packing Style：Requirements of customers
Terms of Payment：T/T

Manufacturer Condition: In accordance with API 5CT Specification, high quality Seamless Pipe is used to manufacture couplings.

Types: Regular, Special Clearance, combination and reducing, EUE Teflon seal-rings and 20° special-bevel couplings, Changeover Couplings - Box x Box, 8 Rd x 10 Rd and LTC Buttress

Threads: According to API 5B, - Edition: Casing Threads: Short and long round, buttress, extreme line and USS Improved Buttress.

Casing Couplings API 8 Round Thread Dimension and Masses

Label	Outside Diameter D (inches)	Outside Diameter W (inches)	Length Inches		Mass Lb/Ft		Quantity Per Carton		Quantity Per Carton
Label	Outside Diameter D (inches)	Outside Diameter W (inches)	Short	Long	Short	Long	Short	Long	Quantity Per Carton
4-1/2	4.500	5.000	6-1/4	7	7.98	9.16	294	294	196
5	5.000	5.563	6-1/2	7-3/4	10.27	12.66	252	210	196
5-1/2	5.500	6.050	6-3/4	8	11.54	14.15	216	180	136
6-5/8	6.625	7.390	7-1/4	8-3/4	20.11	25.01	120	92	100
7	7.000	7.656	7-1/4	9	18.49	23.87	120	100	84
7-5/8	7.625	8.500	7-1/2	9-1/4	27.11	34.46	80	64	64
8-5/8	8.625	9.625	7-3/4	10	35.79	47.77	60	60	52
9-5/8	9.625	10.625	7-3/4	10-1/2	39.75	56.11	50	36	40
10-3/4	10.750	11.750	8	10-1/2	45.81	62.02	45	36	45
11-3/4	11.750	12.750	8	10-1/2	49.91	67.39	40	40	40
13-3/8	13.375	14.375	8	10-1/2	56.57	76.63	25	20	25

Casing Couplings API Buttress Threads Dimension and Masses

Label	Outside Diameter D (inches)	Outside Diameter W (inches)	Outside Diam. Special Clearance	Minimum Length Inches	Mass Lb/Ft		Quantity Per Carton
Label	Outside Diameter D (inches)	Outside Diameter W (inches)	Outside Diam. Special Clearance	Minimum Length Inches	Regular	Special Clearance	Quantity Per Carton
4-1/2	4.500	5.000	4.875	8-7/8	10.120	7.680	196
5	5.000	5.563	5.375	9-1/8	13.000	8.820	196
5-1/2	5.500	6.050	5.875	9-1/4	14.150	9.850	136
6-5/8	6.625	7.390	7.000	9-5/8	24.490	12.460	100
7	7.000	7.656	7.375	10	23.240	13.840	84
7-5/8	7.625	8.500	8.125	10-3/8	34.880	20.470	64
8-5/8	8.625	9.625	9.125	10-5/8	45.990	23.800	52
9-5/8	9.625	10.625	10.125	10-5/8	51.050	26.490	40
10-3/4	10.750	11.750	11.250	10-5/8	56.740	29.520	45
11-3/4	11.750	12.750		10-5/8	61.800		40
13-3/8	13.375	14.375		10-5/8	70.030		25

Note: All Buttress couplings are 5 threads per inch with 4-1/2 thru 13-3/8 taper tapped-3/4" per foot on diameter.
Both LTC and STC couplings are 8 threads per inch and taper tapped-3/4" per foot on diameter

Coupling Grades & Color Identification

Grade	Type	Entery Coupling	Band(s)
H40		None	Same as for pipe
J55 Tubing		Bright Green	None
J55 Casing		Bright Green	One White
K55		Bright Green	None
M65		M65 pipe uses L80 Type 1 couplings
N80	1	Red	None
N80	Q	Red	Green
L80	1	Red	One Brown
L80	9 Cr	Red	Two Yellow
L80	13 Cr	Red	One yellow
C90	1	Purple	None
C90	2	Purple	One yellow
T95	1	Silver	None
T95	2	Silver	One yellow
C95		Brown	None
P110		White	None
Q125	1	Orange	None

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