Product Details

API 5CT Couplings for Casing and Tubing

1. Technical standard:API SPEC 5CT,API SPEC 5B,ISO 11960:2004

2. Product grade:H40,J55,N80-1,N80Q,L80,C90,T95,P110

3.Specification range:

OD127~365.12mm(4-1/2"to 20") for Casing Couplings

4.Thread types:

Casing Couplings: STC,LTC,BTC(casing coupling) Special clearance(SCC)

Note: Some Premium Thread Casing Couplings is also available.

5.Surface treatment: Whole phosphating, or inside phosphating and outside coating

6.Packing: By carton, wooden case, wooden pallet, or by requirements of customers

7.Quality Control:

1. 100% quality test before delivery.

2. Test report will show to users.

8.Technical Parameter:

API round thread coupling---Dimensions, tolerances and masses

Label 1	Size ^a	outside diameter	Min length mm		Diameter of recess	Width of bearing face	Mass kg
Label 1	OD mm	W^b,cmm	Short N_L	Long N_L	Q^dmm	b mm	Short	Long
1	2	3	4	5	6	7	8	9
4-1/2 5 5-1/2 6-5/8 7 7-5/8 8-5/8 9-5/8 10-3/4 11-3/4 13-3/8	114.30 127.00 139.70 168.28 177.80 193.70 219.08 244.48 273.05 298.45 339.72	127.00 141.30 153.67 187.71 200.03 215.90 244.48 269.88 298.45 323.85 365.12	158.75 165.10 171.45 184.15 184.15 190.50 196.85 196.85 203.20 203.20 203.20	177.80 196.85 203.20 222.25 228.60 234.95 254.00 266.70 - - -	116.68 129.38 142.08 170.66 180.18 197.64 223.04 248.44 277.02 302.42 343.69	3.97 4.76 3.18 6.35 4.76 5.56 6.35 6.35 6.35 6.35 5.56	3.62 4.66 5.23 9.12 8.39 12.30 16.23 18.03 20.78 22.64 25.66	4.15 5.75 6.42 11.34 10.83 15.63 21.67 25.45 - - -
^a The size designation for the coupling is the same size designation for the pipe on which the coupling is used. ^BGroups1,2 and 3--Tolerance on outside diameter W,±1% but not greater than±0.38mm ^CGroup4--Tolerance on outside diameter W,±1% but not greater than+3.18 –1.59mm. ^d Tolerance on diameter of recess Q ,for all groups is+0.79 0mm.

API buttress thread coupling---Dimensions, tolerances and masses

Label 1	Size a	outside diameter		Min length	Diameter of recess	Width of bearing face	Mass kg
	OD	Regular	Special clearance d	Min length	Diameter of recess	Width of bearing face	Mass kg
	D mm	Wb,c mm	WC mm	NL mm	Q mm	B mm	Regular	Special clearance
1	2	3	4	5	6	7	8	9
4-1/2 5 5-1/2 6-5/8 7 7-5/8 8-5/8 9-5/8 10-3/4 11-3/4 13-3/8	114.30 127.00 139.70 168.28 177.80 193.68 219.08 244.48 273.05 298.45 339.72	127.00 141.30 153.67 187.71 200.03 215.90 244.48 269.88 298.45 323.85 365.12	123.82 136.52 149.22 177.80 187.32 206.38 231.78 257.18 285.75 - -	225.42 231.78 234.95 244.48 254.00 263.52 269.88 269.88 269.88 269.88 269.88	117.86 130.56 143.26 171.83 181.36 197.23 222.63 248.03 276.61 302.01 343.28	3.18 3.97 3.97 6.35 5.56 7.94 9.52 9.52 9.52 9.52 9.52	4.55 5.85 6.36 11.01 10.54 15.82 20.86 23.16 25.74 28.03 31.77	3.48 4.00 4.47 5.65 6.28 9.29 10.80 12.02 13.39 - -
a The size designation for the coupling is the same size designation for the pipe on which the coupling is used. b Groups1,2 and 3 --Tolerance on outside diameter W,±1% but not greater than±0.38mm c Group4--Tolerance on outside diameter W,±1% but not greater than+3.18 –1.59mm.

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