Flange Pressure-Temperature Ratings for Group Materials
 
  Selection as per ASME B16.5
  NPS 1/2 through NPS 24
  Group Materials 1.1 through 1.18
 
  DATA INPUT
  GROUP MATERIALS
     
  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 150, 300, 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and flanges with rating class designation 2500 in sizes NPS 1/2 through NPS 12.
                     
Table 2-1.1C 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 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 500°F.
    (4)  Not to be used over 700°F.  
Table 2-1.2C Pressure-Temperature Ratings for Group 1.2 Materials
Nominal
Designation
Forgings
Castings
Plates
C–Mn–Si
A 216 Gr. WCC (1)
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 2-1.3C 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)
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 650°F.
    (2)  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.  
(3)  Not to be used over 850°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 2-1.4C 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 2-1.5C 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 2-1.7C 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 1,000°F.
(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 2-1.9C 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 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.  
    (4)  Permissible but not recommended for prolonged use above 1,100°F.  
Table 2-1.10C 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 1,100°F.
(2)  Use normalized and tempered material only.
(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 2-1.11C 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 2-1.13C 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 2-1.14C 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 2-1.15C 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 2-1.17C 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 2-1.18C 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