Plidco Flange+Repair Ring Manual Del Usuario página 13

Note 1: The torque values listed are residual torque value. This is the torque value and residual
stress after bolt relaxation. The studs and nuts must be clean, free running, free of obvious
flaws. The values listed assume that the nuts are properly lubricated with a lubricant having
an approximate coefficient of friction (µ) 0.15 or k factor of 0.19 such as light weight machine
oil. If a lower coefficient of friction lubricant is used, such as graphite, please contact
PLIDCO's Engineering department for appropriate torque values.
Note 2: The second number is the pitch, which is shown in number of threads per inch.
Note 3: Use the pre-stress value shown for the applicable studbolt size if bolt tensioners are to be
used and follow the bolt tensioner manufacturer's instructions.
Note 4: This chart is also to be used for all PTFE (Teflon) coated studs.
PLIDCO Torque Chart
Nominal Wrench
Diameter of Opening
Studbolt Across Flats
(inches)
(inches)
(see Note 2)
5/8--11
3/4--10
7/8--9
1--8
1-1/8--8 1-13/16
1-1/4--8
1-3/8--8
1-1/2--8
1-5/8--8
1-3/4--8
1-7/8--8 2-15/16
2--8
2-1/4--8
2-1/2--8
2-3/4--8
3--8
3-1/4--8
3-1/2--8
3-3/4--8
4--8
4-1/4--8
4-1/2--8
4-3/4--8
5--8
5-1/4--8
5-1/2--8
5-3/4--8
6--8
Studs: ASTM A193 Grade B7 - Nuts: ASTM A194 Grade 2H
Page 12 of 12
Torque Values
(see Note 1)
0.15 C
ft-lbs
25,000 psi pre-stress
1-1/16 56
1-1/4 98
1-7/16 156
1-5/8 233
342
2 480
2-3/16 651
2-3/8 857
2-9/16 1110
2-3/4 1390
1730
3-1/8 2120
3-1/2 3050
3-7/8 4230
23,000 psi pre-stress
4-1/4 5220
4-5/8 6890
5 8800
5-3/8 11000
5-3/4 13600
6-1/8 16600
18,800 psi pre-stress
6-1/2 16300
6-7/8 19400
7-1/4 22900
7-5/8 26700
8 31000
8-3/8 35700
8-3/4 40900
9-1/8 46500
f
Nm
76
133
212
316
464
651
883
1160
1490
1890
2350
2870
4140
5740
7080
9340
11900
15000
18500
22500
22100
26300
31000
36300
42100
48400
55400
63000
IP-008
Revision 1