Type SB tongs is a necessary for buck-on and buck-off all kinds of string pipes during the process of workover.
The fastening tongs size changed by replacement of fastening tongs and shoulders.
Diameters range:3.1/2-13.3/8in;Max torque :75kN.m;
Design and manufacture by API SPEC 7k.
Fastening tongs
|
Shoulder
|
Diameters range
|
Max torque
kN.m
|
in
|
mm
|
1#
|
1
|
3.1/2-4.1/8
|
88.9-104.78
|
75
|
2
|
4.1/-5
|
104.78-127
|
2#
|
1
|
4.1/4-5.1/4
|
107.95-133.35
|
2
|
5-5.3/4
|
127-146.05
|
3
|
6-6.3/4
|
152.4-171.45
|
3#
|
1
|
6.5/8-7.1/4
|
168.28-184.15
|
75
|
2
|
7.3/8-8
|
187.33-203.2
|
3
|
8.1/2-9
|
215.9-228.6
|
4#
|
1
|
9-9.5/8
|
228.6-244.48
|
55
|
2
|
10.5/8-10.3/4
|
269.88-273.05
|
5#
|
1
|
11.3/4
|
298.45
|
6#
|
1
|
12.3/4-13
|
323.85-330.2
|
40
|
7#
|
1
|
13.3/8
|
339.73
|
|