Flange Pressure-Temperature Ratings for Group Materials
 
  Selection as per ASME B16.47
  NPS 26 through NPS 60
  Group Materials 1.1 through 1.18
 
  DATA INPUT
  GROUP MATERIALS
     
  SERIE
     
  NPS
in.
  DESIGN PRESSURE psig    
  DESIGN TEMP  F    
           
  RESULT
  NPS in.    
  OUTSIDE DIAMETER in.    
  No. OF BOLTS      
  WORKING PRESSURE psig    
  ASME CLASS      
           
   
  The application calculates the working pressure and pressure-temperature rating for flanges with rating class designations 75, 150, 300, 400, 600 and 900 in sizes NPS 26 through NPS 60.
                     
Table 3C 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
A 537 Cl. 1 (3)
C–Mn–Si–V
A 350 Gr. LF6 Cl. 1 (4)
3-1⁄2Ni
A 350 Gr. LF 3
Notes:
    (1)  Upon prolonged exposure to temperatures above 800°F, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 800°F.  
(2)  Not to be used over 850°F.
    (3)  Not to be used over 700°F.  
    (4)  Not to be used over 500°F.  
Table 4C 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 800°F, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 800°F.  
    (2)  Not to be used over 650°F  
    (3)  Not to be used over 500°F  
Table 5C Pressure-Temperature Ratings for Group 1.3 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Si
A 352 Gr. LCB (3)
A 515 Gr. 65 (1)
C–Mn–Si
A 516 Gr. 65 (1), (2)
C–1⁄2Mo
A 217 Gr. WC1  (4)-(6)
C–1⁄2Mo
A 352 Gr. LC1 (3)
2-1⁄2Ni
A 203 Gr. A (1)
3-1⁄2Ni
A 203 Gr. D (1)
Notes:
    (1)  Upon prolonged exposure to temperatures above 800°F, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 800°F.  
    (2)  Not to be used over 850°F.  
    (3)  Not to be used over 650°F  
    (4)  Upon prolonged exposure to temperatures above 875°F, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 875°F.  
    (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 6C 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 800°F, the carbide phase of steel may be con­ verted to graphite. Permissible but not recommended for prolonged use above 800°F.  
    (2)  Not to be used over 850°F.  
Table 7C 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 875°F, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible but not recommended for prolonged use above 875°F.  
Table 8C Pressure-Temperature Ratings for Group 1.7 Materials
Nominal
Designation
Forgings
Castings
Plates
1⁄2Cr–1⁄2Mo
A 182 Gr. F2 (2)
Ni–1⁄2Cr–1⁄2M
A 217 Gr. WC4 (1)-(3)
3⁄4Ni–3⁄4Cr–1Mo
A 217 Gr. WC5 (1), (3)
Notes:
    (1)  Use normalized and tempered material only.  
    (2)  Not to be used over 1,000°F.  
    (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 9C Pressure-Temperature Ratings for Group 1.9 Materials  
Nominal
Designation
Forgings
Castings
Plates
1-1⁄4Cr–1⁄2Mo
A217 Gr. WC6 (1), (3), (4)
1-1⁄4Cr–1⁄2Mo–Si
A182 Gr. F11 Cl. 2 (1), (2)
A387 Gr. 11 (2)
Notes:
    (1)  Use normalized and tempered material only.  
    (2)  Permissible but not recommended for prolonged use above 1,100°F.  
    (3)  Not to be used over 1,100°F.  
    (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 10C Pressure-Temperature Ratings for Group 1.10 Materials
Nominal
Designation
Forgings
Castings
Plates
2-1⁄4Cr–1Mo
A182 Gr. F22 Cl. 3 (2) A217 Gr. WC9 (1), (3), (4) A387 Gr. 22 Cl. 2 (2)
Notes:
    (1)  Use normalized and tempered material only.  
    (2)  Permissible but not recommended for prolonged use above 1,100°F.  
    (3)  Not to be used over 1,100°F.  
    (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 11C 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 875°F, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible but not recommended for prolonged use above 875°F.  
Table 12C 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 13C Pressure-Temperature Ratings for Group 1.14 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-lMo
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 14C Pressure-Temperature Ratings for Group 1.15 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-lMo-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 15C 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 1,100°F  
Table 16C Pressure-Temperature Ratings for Group 1.18 Materials
Nominal
Designation
Forgings
Castings
Plates
9Cr-2W-V
A182 Gr. F92 (1)
Note:
    (1) Application above 1,150°F is limited to tubing of maximum outside diameter of 3 1/2 in