OAD REQUIRED FOR MINIMUM GASKET PRESSURE OAD REQUIRED FOR MINIMUM BOLT UTILISATION
< MIN RECOMMENDED AVE (< MIN REC)
MIN MAX 37
126
30
60
60
100
Calculations For ASME B16.5 Flanges With Sheet Gaskets to ASME B16.21 Flange Material = ASTM A105 Stud Bolt Grade = ASTM A193-B7 Nut Grade = ASTM A194-2H M in im um G as ke t Pr es su re Cl as s 15 0 = 3 0 M Pa M in im um G as ke t Pr es su re Cl as s 30 0 = 4 0 M Pa M ax im um Ga sk et Pr es su re = 1 20 M Pa M in im um Bo lt L oa d = 3 0 % o f Yi el d S tr en gt h M ax im um Bo lt Lo ad = 6 0 % of Yi el d S tr en gt h Bolt Condition = NEVER-SEIZE (PASTE) Torque Coefficient, K = 0.17
Gasket OD (mm) Gasket ID (mm) Raised Face Diameter (mm) Slip-on Flange Bore (mm) Weld Neck Flange Bore (mm) Gasket Contact ID (mm) Gasket Contact OD (mm) No. of Bolts Size of Bolts (in) Threads per Inch 2 Gasket Contact Area (mm ) 2 Bolt Core Area (mm ) Bolt Yield Strength (MPa) Maximum Bolt Load Based on Flange Strength (MPa) Maximum Bolt Load Available (kN) Maximum Gasket Pressure Available (MPa) Maximum Gasket Pressure Recommended or Available (MPa) Minimum Bolt Load Based on Minimum Bolt Utilisation (kN) Minimum Bolt Load Based on Minimum Gasket Pressure (kN) Minimum Bolt Load (kN) Minimum Bolt Torque (Nm) Preferred Bolt Load (kN) Preferred Bolt Torque (Nm) Preferred Gasket Pressure (MPa)
Threads per Inch 2 Gasket Contact Area (mm ) 2 Bolt Core Area (mm ) Bolt Yield Strength (MPa) Maximum Bolt Load Based on Flange Strength (MPa) Maximum Bolt Load Available (kN) Maximum Gasket Pressure Available (MPa) Maximum Gasket Pressure Recommended or Available (MPa) Minimum Bolt Load Based on Minimum Bolt Utilisation (kN) Minimum Bolt Load Based on Minimum Gasket Pressure (kN) Minimum Bolt Load (kN) Minimum Bolt Torque (Nm) Preferred Bolt Load (kN) Preferred Bolt Torque (Nm) Preferred Gasket Pressure (MPa)
Notes: 1. Tables are to be used only as a general guide. 2. Tables should not be considered to contain absolute values due to the large number of uncontrollable variables involved with bolted joints. 3. All bolt torque values are based upon the use of new nuts and new bolts of proper design, acceptable quality and approved materials of construction as well as metallurgy. 4. Washers are be used under the head of each nut and the lubricant is to be used on the nuts, bolts and washers. 5. 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. 6. Only torque wrenches that have been calibrated should be used. 7. Refer to Drawing No. 467972 for the flange bolting procedure to be used. 8. No provisions have been made in these tables to account for vibration effects on the bolts.
Bolt Yield Strength at Maximum Operating Temperature Class 150 1
1
Bolt / Nut Combinations 1
2
ASTM A193-B8 CLASS 1
ASTM A194-8
ASTM A193-B8M CLASS 1
ASTM A194-8M
AS 1111.1-4.6
AS 1112.3-5
ASTM A193-B7
ASTM A194-2H 0
Temperature Limits ( C) 1 Bolt Material ASTM A193-B7 ASTM A193-B16 ASTM A193-B8 CLASS 2 ASTM A193-B8M CLASS 2 ASTM A193-B8 CLASS 1 ASTM A193-B8M CLASS 1 AS 1111.1-4.6 ASTM A193-B7
2 Max Temp 300 425 525 450 525 525 200
1 1 1 1 0 0 0
300
1
Gasket Data Minimum & Maximum Recommended Gasket Pressure (MPa) 1
