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The ERW casing and coupling processing line was introduced from America. The annual capacity of ERW casing is 100,000 tons, coupling is 220,000 Pcs.
Product standard of ERW casing
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Standards
|
|
Code of standard
|
|
China National Standard
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GB
|
9711.1、9253.2
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|
American Petroleum Institute
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API
|
5CT、5B
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|
International Organization for Standardization
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ISO
|
11960、10422
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The United States Society for Testing and Materials
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ASTM
|
A370、E112、E45
|
The size of OCTG
|
O.D.
(mm)
|
Unit weight with coupling(kg/m)
|
Steel grade
|
Wall thickness
(mm)
|
Thread type
|
|
LTC
|
STC
|
BTC
|
|
139.70
|
20.83
|
H.J.K
|
6.20
|
|
*
|
|
|
139.70
|
23.07
|
J.K
|
6.98
|
*
|
*
|
*
|
|
139.70
|
25.30
|
J.K
|
7.72
|
*
|
*
|
*
|
|
177.80
|
25.30
|
H
|
5.87
|
|
*
|
|
|
177.80
|
29.76
|
H.J.K
|
6.91
|
|
*
|
|
|
177.80
|
34.23
|
J.K
|
8.05
|
*
|
*
|
*
|
|
177.80
|
38.69
|
J.K
|
9.19
|
*
|
*
|
*
|
|
219.08
|
35.72
|
J.K
|
6.71
|
|
*
|
|
|
219.08
|
41.67
|
H
|
7.72
|
|
*
|
|
|
219.08
|
47.62
|
H
|
8.94
|
|
*
|
|
|
219.08
|
47.62
|
J.K
|
8.94
|
*
|
*
|
*
|
|
219.08
|
53.57
|
J.K
|
10.16
|
*
|
*
|
*
|
|
244.48
|
48.07
|
H
|
7.92
|
|
*
|
|
|
244.48
|
53.57
|
H
|
8.94
|
*
|
*
|
*
|
|
244.48
|
53.57
|
J.K
|
8.94
|
*
|
*
|
*
|
|
244.48
|
59.53
|
J.K
|
10.03
|
*
|
*
|
*
|
|
273.05
|
48.74
|
H
|
7.09
|
|
*
|
|
|
273.05
|
60.27
|
H.J.K
|
8.89
|
|
*
|
*
|
|
273.05
|
67.71
|
J.K
|
10.16
|
|
*
|
*
|
|
273.05
|
75.90
|
J.K
|
11.43
|
|
*
|
*
|
|
339.72
|
71.43
|
H
|
8.38
|
|
*
|
|
|
339.72
|
81.10
|
J.K
|
9.65
|
|
*
|
*
|
|
339.72
|
90.78
|
J.K
|
10.92
|
|
*
|
*
|
|
339.72
|
101.19
|
J.K
|
12.19
|
|
*
|
*
|
Coupling dimension, weight of casing with LTC
|
Size
(mm)
|
O.D.
(mm)
|
Min. Length
|
Bore Diameter
(mm)
|
Width of bearing surface
(mm)
|
Weight(Kg)
|
|
Short couplingSTC
(mm)
|
Long coupling
(mm)
|
SC
|
LC
|
|
NL
|
NL
|
|
139.70
|
153.67
|
171.45
|
203.20
|
142.08
|
3.18
|
11.54
|
14.15
|
|
177.80
|
194.46
|
184.15
|
228.60
|
180.18
|
4.76
|
18.49
|
23.87
|
|
219.08
|
244.48
|
196.85
|
254.00
|
223.04
|
6.35
|
35.79
|
47.77
|
|
244.48
|
269.88
|
196.85
|
266.70
|
248.44
|
6.35
|
39.75
|
56.11
|
|
273.05
|
298.45
|
203.20
|
-
|
277.02
|
6.35
|
45.81
|
-
|
|
339.72
|
365.12
|
203.20
|
-
|
343.69
|
5.56
|
56.57
|
-
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Coupling dimension, weight of casing with BTC
|
Size
(mm)
|
O.D.
(standard coupling)
(mm)
|
Min. Length
(mm)
|
Bore Diameter
(mm)
|
Width of bearing surface
(mm)
|
Weight
(standard coupling)
WC
|
|
139.70
|
153.67
|
234.95
|
143.26
|
3.97
|
14.15
|
|
177.80
|
194.46
|
254.00
|
181.36
|
5.56
|
23.24
|
|
219.08
|
244.48
|
269.88
|
222.63
|
9.52
|
45.99
|
|
244.48
|
269.88
|
269.88
|
248.03
|
9.52
|
51.05
|
|
273.05
|
298.45
|
269.88
|
276.61
|
9.52
|
56.74
|
|
339.72
|
365.12
|
269.88
|
343.28
|
9.52
|
70.03
|
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