Thread
gauge & Single instrument
We are the first
company in China that specializes in selling API thread gages and offering
rofessional calibration services. All gages come with third-party calibration
that are traceable to China National Institute of Metrology and NIST.
We are serving 60% of
the OCTG manufacturers and oilfield service companies in China, which include
China National Petroleum Corporation, China Petrochemical Corporation, China
National Offshore Oil Corporation, Wuxi Seamless Oil Pipes Company Limited,
Baker Hughes China, Weatherford China, etc.
|
NON-UPSET TUBING(NU/TBG)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
1.660
|
42.16
|
40.596
|
10
|
1:16
|
7.620¡À0.635
|
|
1.900
|
48.26
|
46.692
|
|
2-3/8
|
60.32
|
58.757
|
|
2-7/8
|
73.02
|
71.457
|
|
3-1/2
|
88.90
|
87.332
|
|
4
|
101.60
|
99.414
|
8
|
9.525¡À0.635
|
|
4-1/2
|
114.30
|
112.114
|
|
UPSET TUBING(EU/UPTBG)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
1.660
|
42.16
|
44.470
|
10
|
1:16
|
7.620¡À0.635
|
|
1.900
|
48.26
|
51.614
|
|
2-3/8
|
60.32
|
63.697
|
8
|
9.525¡À0.635
|
|
2-7/8
|
73.02
|
76.397
|
|
3-1/2
|
88.90
|
93.064
|
|
4
|
101.60
|
105.764
|
|
4-1/2
|
114.30
|
118.464
|
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CASING SHORT-THREAD(CSG)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
4-1/2
|
114.30
|
111.846
|
8
|
1:16
|
9.525¡À0.635
|
|
5
|
127.00
|
124.546
|
|
5-1/2
|
139.70
|
137.246
|
|
6-5/8
|
168.28
|
165.821
|
|
7
|
177.80
|
175.346
|
|
7-5/8
|
193.68
|
191.114
|
|
8-5/8
|
219.08
|
216.514
|
|
9-5/8
|
244.48
|
241.914
|
|
10-3/4
|
273.05
|
270.489
|
|
11-3/4
|
298.45
|
295.889
|
|
13-3/8
|
339.72
|
337.164
|
|
16
|
406.40
|
403.839
|
|
18-5/8
|
473.08
|
470.514
|
|
20
|
508.00
|
505.439
|
|
CASING LONG-THREAD(LCSG)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
4-1/2
|
114.30
|
111.846
|
8
|
1:16
|
9.525¡À0.635
|
|
5
|
127.00
|
124.546
|
|
5-1/2
|
139.70
|
137.246
|
|
6-5/8
|
168.28
|
165.821
|
|
7
|
177.80
|
175.346
|
|
7-5/8
|
193.68
|
191.114
|
|
8-5/8
|
219.08
|
216.514
|
|
9-5/8
|
244.48
|
241.914
|
|
20
|
508.00
|
505.439
|
|
BUTTRESS CASING(BCSG)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
4-1/2
|
114.71
|
113.132
|
5
|
1:16
|
2.540¡À0.381
|
|
5
|
127.41
|
125.832
|
5.080¡À0.381
|
|
5-1/2
|
140.11
|
138.532
|
|
6-5/8
|
168.68
|
167.107
|
|
7
|
178.21
|
176.632
|
|
7-5/8
|
194.08
|
192.507
|
|
8-5/8
|
219.48
|
217.907
|
|
9-5/8
|
244.88
|
243.307
|
|
10-3/4
|
273.46
|
271.882
|
|
11-3/4
|
298.86
|
297.282
|
|
13-3/8
|
340.13
|
338.557
|
|
16
|
406.40
|
404.825
|
1:12
|
4.445¡À0.381
|
|
18-5/8
|
473.08
|
471.500
|
|
20
|
508.00
|
506.425
|
|
LINE PIPE(LP)
|
|
Size
|
Major Diameter
|
Pitch Diameter
|
T.P.I.
|
T.P.F.
|
Standoff Tolerance
|
|
1-1/4
|
42.16
|
40.218
|
11-1/2
|
1:16
|
6.629¡À2.210
|
|
1-1/2,
, |
48.26
|
46.287
|
|
2
|
60.32
|
58.325
|
|
2-1/2
|
73.02
|
70.159
|
8
|
9.525¡À2.540
|
|
3
|
88.90
|
86.068
|
|
3-1/2
|
101.60
|
98.776
|
|
4
|
114.30
|
111.433
|
|
5
|
141.30
|
138.412
|
|
NUMBERED CONNECTIONS(NC)
|
|
Size
|
Thread Form
|
T.P.I.
|
T.P.F.
|
Pitch Diameter
|
Standoff Tolerance
|
|
NC23
|
V-0.038R
|
4
|
1:6
|
59.817
|
15.875¡À0.100
|
|
NC26(IF 2-3/8)
|
67.767
|
|
NC31(IF 2-7/8)
|
80.848
|
|
NC35
|
89.687
|
|
NC38(IF 3-1/2)
|
96.732
|
|
NC40(FH4)
|
103.429
|
|
NC44
|
112.192
|
|
NC46(IF 4)
|
117.500
|
|
NC50(IF 4-1/2)
|
128.059
|
|
NC56
|
1:4
|
142.646
|
|
NC61
|
156.921
|
|
NC70
|
179.146
|
|
NC77
|
196.621
|
|
REGULAR ROTARY(REG)
|
|
Size
|
Thread Form
|
T.P.I.
|
T.P.F.
|
Pitch Diameter
|
Standoff Tolerance
|
|
REG 2-3/8
|
V-0.040
|
5
|
1:4
|
60.080
|
15.875¡À0.100
|
|
REG 2-7/8
|
69.605
|
|
REG 3-1/2
|
82.293
|
|
REG 4-1/2
|
110.868
|
|
REG 5-1/2
|
V-0.050
|
4
|
132.944
|
|
REG 6-5/8
|
1:6
|
146.248
|
|
REG 7-5/8
|
1:4
|
170.549
|
|
REG 8-5/8
|
194.731
|
|
FULL HOLE(FH)
|
|
Size
|
Thread Form
|
T.P.I.
|
T.P.F.
|
Pitch Diameter
|
Standoff Tolerance
|
|
FH 3-1/2
|
V-0.040
|
5
|
1:4
|
94.844
|
15.875¡À0.100
|
|
FH 4(NC40)
|
V-0.065
|
4
|
1:6
|
103.429
|
|
FH 4-1/2
|
V-0.040
|
5
|
1:4
|
115.113
|
|
FH 5-1/2
|
V-0.050
|
4
|
1:6
|
142.011
|
|
FH 6-5/8
|
V-0.050
|
4
|
1:6
|
165.598
|
|
INTERNAL FLUSH(IF)
|
|
Size
|
Thread Form
|
T.P.I.
|
T.P.F.
|
Pitch Diameter
|
Standoff Tolerance
|
|
IF 2-3/8(NC26)
|
V-0.065
|
4
|
1:6
|
67.767
|
15.875¡À0.100
|
|
IF 2-7/8(NC31)
|
80.848
|
|
IF 3-1/2(NC38)
|
96.732
|
|
IF 4(NC46)
|
117.500
|
|
IF 4-1/2(NC50)
|
128.059
|
|
IF 5-1/2
|
157.201
|
Single
instrument
Tubing
& Casing Inspection System Solutions
Rotary
Shouldered Connection Thread Inspection System
Premium Connection Inspection Gages
