Tablas de torques para bridas

METAL/SPIRAL WOUND GASKETS

Engineering Data/FAQs

Torque Tables
These tables were developed to be used with Garlock spiral wound gaskets. They are to be used only as a general guide. They should not be considered to contain absolute values due to the large number of uncontrollable variables involved with bolted joints. If there is doubt as to the proper torque value to use, we suggest thatthe maximum value be used. All bolt torque values are based upon the use of new nuts (ASTM A194, GR 2H) and new bolts (ASTM A193, GR B7) of proper design, acceptable quality and approved materials of construction as well as metallurgy. It is also required that two hardened steel washers be used under the head of each nut and that a non-metallic based lubricant (i.e. oil and graphite) be used onthe nuts, bolts and washers. The flanges are assumed to be in good condition and in compliance with ASME B16.5 specifications. Special attention should be given to seating surface finish and flatness. See "Recommended Flange Finish". Only torque wrenches that have been calibrated should be used. The proper bolt tightening pattern must be followed with the desired ultimate torque value arrived at ina minimum of three equal increments. All bolts in the flange should then be checked in consecutive order in a counterclockwise direction. See "Gasket Installation". The contact dimensions listed are taken from the ID and OD of the windings, which are different from the ASME ring gasket dimensions. No provisions have been made in these tables to account for vibration effects on the bolts. Thesetables are are based on ambient conditions, without compensation for elevated temperatures. If conditions different from these exist, we suggest that further analysis be performed to determine the appropriate torque values.

Torque Tables For Spiral Wound Gaskets, ASME B16.5
Class 150
0.5 Gsk. ID Contact (inches) Gsk. OD Contact (inches) Gsk. Area Contact (Sq. in.) No. Of Bolts Size of Bolts(inches) Max. Torque per Bolts a@ 60 ksi Bolt Stress (ft lb) Comp. Per Bolt @ 60K (ft lb) Max. Gsk. Comp. Available (psi) Min. Gsk. Comp. Recomm. (psi) Minimum Torque per Bolt (ft lb) Max. Gsk. Comp. Recomm. Avail. (psi) Prefer'd Torque (ft lb) 0.75 1.25 0.79 4 0.5 60 7560 0.75 1 1.56 1.13 4 0.5 60 7560 1 1.25 1.88 1.53 4 0.5 60 7560 1.25 1.88 2.38 1.67 4 0.5 60 7560 1.5 2.13 2.75 2.39 4 0.5 60 7560 22.75 3.38 3.01 4 0.63 120 2.5 3.25 3.88 3.50 4 0.63 120 3 4 4.75 5.15 4 0.63 120 Nom. Pipe Size (inches) 4 5 6 5 5.88 7.47 8 0.63 120 6.13 7 9.02 8 0.75 200 7.19 8.25 12.88 8 0.75 200 8 9.19 10.38 18.25 8 0.75 200 10 11.31 12.5 22.21 12 0.88 320 12 13.38 14.75 30.37 12 0.88 320 14 14.63 16 33.07 12 1 490 16 16.63 18.25 44.51 16 1 490 18 18.69 20.75 63.88 16 1.13 710 20 20.69 22.75 70.36 20 1.13710 24 24.75 27 91.45 20 1.25 1000

12120 12120 12120 12120 18120 18120 18120 25140 25140 33060 33060 43680 43680 55740 9406 12974 16071 11253 7945 13584 9933 11995 11884 10940 12415 12190

38503 26712 19713 18119 12637 16125 13861

10000 10000 10000 10000 10000 10000 10000 16 22 30 33 47 74 87

9406 120 9406 120

10000 10000 10000 92 124 178

7945 200 7945 200

10000 236 13584 3209933 320 9933 320

10000 10000 10000 10000 10000 408 412 649 572 820

30000 26712 19713 18119 12637 16125 13861 47 60 60 60 60 120 120

12974 16071 11253 120 200 200

11995 11884 10940 12415 12190 490 490 710 710 1000

Tables are based on the use of bolts with a yield strength of 100,000 psi.

Class 300
0.5 0.75 1 1.25 1.5 Gsk. ID Contact 0.75 1 1.25 1.88 2.13 (inches) Gsk. ODContact 1.25 1.56 1.88 2.38 2.75 (inches) Gsk. Area Contact 0.79 1.13 1.55 1.67 2.38 (Sq. in.) 4 4 4 4 4 No. Of Bolts Size of Bolts 0.5 0.63 0.63 0.63 0.75 (inches) Max. Torque per Bolts 60 120 120 120 200 @ 60 ksi Bolt Stress (ft lb) Comp. Per Bolt @ 60K 7560 12120 12120 12120 18120 (ft lb) Max. Gsk. 38522 43079 31319 28994 30517 Comp. Available (psi) Min. Gsk. 10000 10000 10000 10000 10000 Comp....