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PRODUCTS & SERVICES
OCTG :
Casing | Tubing | Pup Joints | Tubing Couplings | Casing Couplings | Line Pipe
Precision Machining :
Tool Joints | Batch Production For Precision Machining Operations
Processing & Inspection Services :
TT Processing | Pipe Processing | Pipe Inspection | Inspection Services
OCTG - Tubing Couplings
 API EXTERNAL - UPSET TUBING COUPLINGS
Manufacturer Condition: In accordance with API 5CT Specification - 7th Edition, 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.
Threads: According to API 5B - Edition: Tubing Threads: Short and long round and extreme line.
Couplings Process Control Chart
Casing Tubing API 8 Round Thread Dimension and Masses
|
Size
|
Outside Diameter
|
-
|
Threads
Per Inch
|
Weight Per Piece
|
Quantity
|
|
(Pipe OD)
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
Length
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
Per Carton
|
|
Inches
|
Inches
|
Inches
|
Inches
|
Inches
|
lbs
|
|
1.9
|
2.5
|
-
|
3-7/8
|
10 Round
|
1.85
|
-
|
-
|
|
2-3/8
|
3.063
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2.91
|
4-7/8
|
8 Round
|
3.42
|
2.38
|
1,444
|
|
2-7/8
|
3.668
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3.46
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5-1/2
|
8 Round
|
5.27
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3.45
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792
|
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3-1/2
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4.5
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4.18
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5-3/4
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8 Round
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9.02
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5.22
|
448
|
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4
|
5
|
-
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6
|
8 Round
|
10.62
|
-
|
392
|
|
4-1/2
|
5.563
|
-
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6-1/2
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8 Round
|
13.31
|
-
|
252
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API NON-UPSET TUBING COUPLINGS
|
Size
|
Outside Diameter
|
-
|
Threads
Per Inch
|
Weight Per Piece
|
Quantity
|
|
(Pipe OD)
|
Reg. & Spec.
Bevel
|
Length
|
Reg. & Spec.
Bevel
|
Per Carton
|
|
Inches
|
Inches
|
Inches
|
Inches
|
|
1.9
|
2.2
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3-3/4
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10 Round
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1.23
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1,960
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2-3/8
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2.875
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4-1/2
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10 Round
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2.82
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1,512
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2-7/8
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3.5
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5-1/2
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10 Round
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5.15
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800
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3-1/2
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4.25
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5-5/8
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10 Round
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8.17
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502
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4
|
4.75
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5-3/4
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8 Round
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9.57
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392
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4-1/2
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5.2
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6-1/2
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8 Round
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10.76
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252
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IMPROVED BUTTRESS THREAD TUBING COUPLING
|
Size
|
Outside Diameter
|
-
|
Threads
Per Inch
|
Weight Per Piece
|
|
(Pipe OD)
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
Length
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
|
Inches
|
Inches
|
Inches
|
Inches
|
Inches
|
lbs
|
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2
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2.5
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2.3
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7-3/4
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8
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4.18
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2.53
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2-3/8
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2.875
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2.7
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8-1/2
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8
|
5.46
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3.62
|
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2-7/8
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3.5
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3.22
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8-1/2
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8
|
8.14
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4.59
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3-1/2
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4.25
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3.865
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8-1/2
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8
|
11.74
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5.83
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4
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4.75
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4.4
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9
|
8
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14.17
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7.75
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4-1/2
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5.2
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4.92
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9-1/2
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8
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15.72
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9.73
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ACME THREAD TUBING COUPLINGS
|
Size
|
Outside Diameter
|
-
|
Threads
Per Inch
|
Weight Per Piece
|
|
(Pipe OD)
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
Length
|
Reg. & Spec.
Bevel
|
Spec.
Clearance
|
|
Inches
|
Inches
|
Inches
|
Inches
|
Inches
|
lbs
|
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2
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2.5
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2.3
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7-3/4
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8
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4.3
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2.66
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2-3/8
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2.875
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2.7
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8-1/2
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8
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5.61
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3.79
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2-7/8
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3.5
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3.22
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8-1/2
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8
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8.31
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4.79
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3-1/2
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4.25
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3.865
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8-1/2
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8
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11.92
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6.08
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4
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4.75
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4.4
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9
|
8
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13.48
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7.49
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4-1/2
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5.2
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4.92
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9-1/2
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8
|
14.06
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8.76
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Grades Color Code
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Grade
|
Type
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Entry Coupling
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Band(s)
|
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H40
|
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None
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Same as for pipe
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J55 Tubing
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Bright Green
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None
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J55 Casing
|
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Bright Green
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One White
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K55
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Bright Green
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None
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M65
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M65 pipe uses L80 Type 1 couplings
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N80
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1
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Red
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None
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N80
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Q
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Red
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Green
|
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L80
|
1
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Red
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One Brown
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L80
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9 Cr
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Red
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Two Yellow
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L80
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13 Cr
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Red
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One yellow
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C90
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1
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Purple
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None
|
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C90
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2
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Purple
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One yellow
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T95
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1
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Silver
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None
|
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T95
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2
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Silver
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One yellow
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C95
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Brown
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None
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P110
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White
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None
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Q125
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1
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Orange
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None
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