Torque Tables

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Torque Tables 1 of 9 http://www.dracomech.com/metalgaskets/torque.html 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 that the maximum value be used. All b
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  METAL/SPIRAL WOUND GASKETS Engineering Data/FAQs Torque Tables These tables were developed to be used with Garlock spiralwound gaskets. They are to be used only as a generalguide. They should not be considered to contain absolutevalues due to the large number of uncontrollable variablesinvolved with bolted joints. If there is doubt as to theproper torque value to use, we suggest that the maximumvalue 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 materialsof construction as well as metallurgy. It is also requiredthat two hardened steel washers be used under the headof each nut and that a non-metallic based lubricant (i.e. oiland graphite) be used on the nuts, bolts and washers.The flanges are assumed to be in good condition and incompliance with ASME B16.5 specifications. Specialattention should be given to seating surface finish andflatness. See Recommended Flange Finish .Only torque wrenches that have been calibrated should beused. Theproper bolt tightening patternmust be followedwith the desired ultimate torque value arrived at in aminimum of three equal increments. All bolts in the flangeshould then be checked in consecutive order in acounterclockwise direction. See Gasket Installation .The contact dimensions listed are taken from the ID andOD of the windings, which are different from the ASME ringgasket dimensions.No provisions have been made in these tables to accountfor vibration effects on the bolts. These tables are arebased on ambient conditions, without compensation forelevated temperatures. If conditions different from theseexist, we suggest that further analysis be performed todetermine the appropriate torque values. Torque TablesFor Spiral Wound Gaskets, ASMEB16.5 Class 150   Nom. Pipe Size (inches)   0.50.7511.251.522.534568101214161820Gsk. IDContact(inches) 0.7511.251.882.132.753.25456.137.199.1911.3113.3814.6316.6318.6920.692 Gsk. ODContact(inches) 1.251.561.882.382.753.383.884.755.8878.2510.3812.514.751618.2520.7522.75 Gsk. AreaContact 0.791.131.531.672.393.013.505.157.479.0212.8818.2522.2130.3733.0744.5163.8870.369 orque Tableshttp://www.dracomech.com/metalgaskets/torque.html1 of 929/11/2554 9:36  (Sq. in.)No. of Bolts 444444448888121212161620 Size of Bolts(inches) 0.50.50.50.50.50.630.630.630.630.750.750.750.880.88111.131.13 Max.Torqueper Bolts@ 60 ksiBoltStress(ft lb) 6060606060120120120120200200200320320490490710710 Comp.perBolt @60K (ft lb) 75607560756075607560121201212012120121201812018120181202514025140330603306043680436805 Max.Gsk.Comp. Available(psi) 3850326712197131811912637161251386194061297416071112537945135849933119951188410940124151 Min. Gsk.Comp.Recomm.(psi) 1000010000100001000010000100001000094061000010000100007945100009933100001000010000100001 MinimumTorqueperBolt (ftlb) 1622303347748712092124178200236320408412649572 Max.Gsk.Comp.Recomm. Avail.(psi) 3000026712197131811912637161251386194061297416071112537945135849933119951188410940124151 Prefer'dTorque(ft lb) 4760606060120120120120200200200320320490490710710Tables are based on the use of bolts with a yield strength of 100,000 psi. Class 300   Nom. Pipe Size (inches)   0.50.7511.251.522.534568101214161820Gsk. IDContact(inches) 0.7511.251.882.132.753.25456.137.199.1911.3113.3814.6316.6318.6920.692 Gsk. ODContact(inches) 1.251.561.882.382.753.383.884.755.8878.2510.3812.514.751618.2520.7522.75 Gsk. AreaContact(Sq. in.) 0.791.131.551.672.383.033.535.157.528.9712.8518.2822.2430.2532.9444.3663.7870.259 No. of Bolts 44444888881212161620202424 Size of Bolts(inches) 0.50.630.630.630.750.630.750.750.750.750.750.8811.131.131.251.251.25 orque Tableshttp://www.dracomech.com/metalgaskets/torque.html2 of 929/11/2554 9:36  Max.Torqueper Bolts@ 60 ksiBoltStress(ft lb) 60120120120200120200200200200200320490710710100010001000 Comp.perBolt @60K (ft lb) 756012120121201212018120121201812018120181201812018120251403306043680436805574055740557408 Max.Gsk.Comp. Available(psi) 3852243079313192899430517319834111028139192871616616925165022378223102265202513320975190442 Min. Gsk.Comp.Recomm.(psi) 1000010000100001000010000100001000010000100001000010000100001000010000100001000010000100001 MinimumTorqueperBolt (ftlb) 1628384166384971104124118194206307268398477525 Max.Gsk.Comp.Recomm. Avail.(psi) 3000030000300002899430000300003000028139192871616616925165022378223102265202513320975190442 Prefer'dTorque(ft lb) 4784115120197113146200200200200320490710710100010001000Tables are based on the use of bolts with a yield strength of 100,000 psi. Class 400   Nom. Pipe Size (inches)   456810121416182024Gsk. IDContact(inches) 4.755.816.888.8810.8112.8814.2516.2518.520.524.75 Gsk. ODContact(inches) 5.8878.2510.3812.514.751618.2520.7522.7527 Gsk. AreaContact(Sq. in.) 9.4311.9716.2722.6830.9240.5641.5654.1769.3376.3991.40 No. of Bolts 88121216162020242424 Size of Bolts(inches) 0.880.880.8811.131.251.251.381.381.51.75 Max. Torqueper Bolts@ 60 ksiBolt Stress(ft lb) 320320320490710100010001360136016003000 Comp. perBolt @ 60K (ft lb) 25140251402514033060436805574055740693006930084300118800 orque Tableshttp://www.dracomech.com/metalgaskets/torque.html3 of 929/11/2554 9:36  Max. Gsk.Comp. Available(psi) 2132916807185401749322600219882682625588239912648531194 Min. Gsk.Comp. Recomm.(psi) 1000010000100001000010000100001000010000100001000010000 MinimumTorque perBolt (ft lb) 150190173280314455373531567604962 Max. Gsk.Comp. Recomm. Avail. (psi) 213291680718540174932260021988268262558823991264853000 Prefer'dTorque(ft lb) 320320320490710100010001360136016002885Tables are based on the use of bolts with a yield strength of 100,000 psi. Class 600   Nom. Pipe Size (inches)   0.50.7511.251.522.534568101214161820Gsk. IDContact(inches) 0.7511.251.882.132.753.2544.755.816.888.8810.8112.8814.2516.2518.520.5 Gsk. ODContact(inches) 1.251.561.882.382.753.383.884.755.8878.2510.3812.514.751618.2520.7522.75 Gsk. AreaContact(Sq. in.) 0.791.131.551.672.383.033.535.159.4311.9716.2722.6830.9240.5641.5654.1769.3376.39 No. of Bolts 44444888881212162020202024 Size of Bolts(inches) 0.50.630.630.630.750.630.750.750.88111.131.251.251.381.51.631.63 Max.Torqueper Bolts@ 60 ksiBoltStress(ft lb) 60120120120200120200200320490490710100010001360160022002200 Comp.perBolt @60K (ft lb) 756012120121201212018120121201812018120251403306033060436805574055740693008430010080010080 Max.Gsk.Comp. Available(psi) 385224307931319289943051731983411102813921329221022438123112288402748633353311272908031669 Min. Gsk.Comp.Recomm.(psi) 100001000010000100001000010000100001000010000100001000010000100001000010000100001000010000 MinimumTorqueperBolt (ftlb) 1628384166384971150222201307347364408514757695 orque Tableshttp://www.dracomech.com/metalgaskets/torque.html4 of 929/11/2554 9:36
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