Flange Pressure-Temperature Ratings for Group Materials
 
  Selection as per ASME B16.5
  DN 15 through DN 600
  Group Materials 1.1 through 1.18
           
  DATA INPUT
  GROUP MATERIALS
     
  DN
mm    
  DESIGN PRESSURE barg    
  DESIGN TEMP  C    
           
  RESULT
  DN mm    
  OUTSIDE DIAMETER mm    
  No. OD BOLTS      
  WORKING PRESSURE barg    
  ASME CLASS      
           
   
  The application calculates the working pressure and pressure-temperature rating for flanges with rating class designations 150, 300, 400, 600, 900, and 1500 in sizes DN 15 through DN 600 and flanges with rating class designation 2500 in sizes DN 15 through DN 300.
                     
Table 2-1.1 Pressure-Temperature Ratings for Group 1.1 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Si
A 105 (1)
A 216 Gr. WCB (1) A 515 Gr. 70 (1)
C–Mn–Si
A 350 Gr. LF2 (1)
A 516 Gr. 70 (1), (2)
C–Mn–Si–V
A 350 Gr. LF6 Cl. 1 (3)
A 537 Cl. 1 (4)
3-1⁄2Ni
A 350 Gr. LF 3
Notes:
    (1)  Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 425°C.  
(2)  Not to be used over 455°C.
    (3)  Not to be used over 260°C.  
    (4)  Not to be used over 370°C.  
Table 2-1.2 Pressure-Temperature Ratings for Group 1.2 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Mn–Si
A 216 Gr. WCC (1)
C–Mn–Si
A 352 Gr. LCC (2)
C–Mn–Si–V
A 350 Gr. LF6 Cl. 2 (3)
2-1⁄2Ni
A 352 Gr. LC2
A 203 Gr. B (1)
3-1⁄2Ni
A 352 Gr. LC3 (2)
A 203 Gr. E (1)
Notes:
    (1)  Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 425°C.  
    (2)  Not to be used over 340°C  
    (3)  Not to be used over 260°C  
Table 2-1.3 Pressure-Temperature Ratings for Group 1.3 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Si
A 352 Gr. LCB (1)
A 515 Gr. 65 (2)
C–Mn–Si
A 516 Gr. 65 (2), (3)
C–1⁄2Mo
A 217 Gr. WC1  (4)-(6)
C–1⁄2Mo
A 352 Gr. LC1 (1)
2-1⁄2Ni
A 203 Gr. A (2)
3-1⁄2Ni
A 203 Gr. D (2)
Notes:
    (1)  Not to be used over 340°C.  
    (2)  Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be con­verted to graphite. Permissible but not recommended for prolonged use above 425°C.  
    (3)  Not to be used over 455°C  
    (4)  Upon prolonged exposure to temperatures above 465°C, the carbide phase of steel may be con­verted to graphite. Permissible but not recommended for prolonged use above 465°C.  
    (5)  Use normalized and tempered material only.  
    (6)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.   
Table 2-1.4 Pressure-Temperature Ratings for Group 1.4 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Si
A 515 Gr. 60 (1)
C–Mn–S
A 350 Gr. LF1, Cl.1 (1)
A 515 Gr. 60 (1), (2)
Notes:
    (1)  Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 425°C.  
    (2)  Not to be used over 455°C.  
Table 2-1.5 Pressure-Temperature Ratings for Group 1.5 Materials
Nominal
Designation
Forgings
Castings
Plates
C–1⁄2Mo
A 182 Gr. F1 (1)
A 204 Gr. A (1)
A 204 Gr. B (1)
Note:
    (1)   Upon prolonged exposure to temperatures above 465°C, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible but not recommended for prolonged use above 465°C.  
Table 2-1.7 Pressure-Temperature Ratings for Group 1.7 Materials
Nominal
Designation
Forgings
Castings
Plates
1⁄2Cr–1⁄2Mo
A 182 Gr. F2 (1)
Ni–1⁄2Cr–1⁄2M
A 217 Gr. WC4 (1)-(3)
3⁄4Ni–3⁄4Cr–1Mo
A 217 Gr. WC5 (2), (3)
Notes:
    (1)  Not to be used over 538°C.  
    (2)  Use normalized and tempered material only.  
    (3)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
    Table 2-1.9 Pressure-Temperature Ratings for Group 1.9 Materials  
Nominal
Designation
Forgings
Castings
Plates
1-1⁄4Cr–1⁄2Mo
A217 Gr. WC6 (1)-(3)
1-1⁄4Cr–1⁄2Mo–Si
A182 Gr. F11 Cl. 2 (1), (4)
A387 Gr. 11 (4)
Notes:
    (1)  Use normalized and tempered material only.  
    (2)  Not to be used over 590°C.  
    (3)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
    (4)  Permissible but not recommended for prolonged use above 590°C.  
Table 2-1.10 Pressure-Temperature Ratings for Group 1.10 Materials
Nominal
Designation
Forgings
Castings
Plates
2-1⁄4Cr–1Mo
A182 Gr. F22 Cl. 3 (1) A217 Gr. WC9 (2)-(4) A387 Gr. 22 Cl. 2 (1)
Notes:
    (1)  Permissible but not recommended for prolonged use above 590°C.  
    (2)  Use normalized and tempered material only.  
    (3)  Not to be used over 590°C.  
    (4)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
Table 2-1.11 Pressure-Temperature Ratings for Group 1.11 Materials
Nominal
Designation
Forgings
Castings
Plates
C–1⁄2Mo
A204, Gr. C (1)
Note:
    (1) Upon prolonged exposure to temperatures above 465°C, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible but not recommended for prolonged use above 465°C.  
Table 2-1.13 Pressure-Temperature Ratings for Group 1.13 Materials
Nominal
Designation
Forgings
Castings
Plates
5Cr–1⁄2Mo
A182 Gr. F5a
 A217 Gr. C5 (1), (2)
Notes:
(1)  Use normalized and tempered material only.
    (2)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
Table 2-1.14 Pressure-Temperature Ratings for Group 1.14 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-1Mo
A182 Gr. F9 
A217 Gr. C12  (1), (2)
Notes:
(1)  Use normalized and tempered material only.
    (2)  The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
Table 2-1.15 Pressure-Temperature Ratings for Group 1.15 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-1Mo-V 
A182 Gr. F91 
A217 Gr. C12 A (1) A387 Gr. 91 CL 2
Note:
    (1) The deliberate addition of any element not listed in ASTM A217, Table 1 is prohibited, except that calcium (Ca) and manganese (Mn) may be added for deoxidation.  
Table 2-1.17 Pressure-Temperature Ratings for Group 1.17 Materials
Nominal
Designation
Forgings
Castings
Plates
1Cr-1/2Mo 
A182 Gr. F12 Cl. 2 (1), (2)
5Cr-1/2Mo 
A182 Gr. F5
Notes:
    (1)  Use normalized and tempered material only.  
    (2)  Permissible but not recommended for prolonged use above 590°C  
Table 2-1.18 Pressure-Temperature Ratings for Group 1.18 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-2W-V
A182 Gr. F92 (1)
Note:
    (1) Application above 620°C is limited to tubing of maximum outside diameter of 3 1/2 in