Metallic Gasket Materials: R38-R64

API Ring Number Size of Flange, Inches
General Use Oil Field Use
150 lbs. 300 to 600 lbs. 900 lbs. 1500 lbs. 2500 lbs. 500, 1000, 2000, 3000 lbs. 5000 lbs.
R38         4    
R39       4     4
R40 5            
R41   5 5     5  
R42         5    
R43 6            
R44             5
R45   6 6 5   6  
R46             6
R47       6      
R48 8       6    
R49   8 8     8  
R50             8
R51       8      
R52 10       8    
R53   10 10     10  
R54       10     10
R55         10    
R56 12            
R57   12 12     12  
R58       12      
R59 14            
R60         12    
R61   14       14  
R62     14        
R63       14      
R64 16            

RTJ standard size gaskets are manufactured in accordance with API-6A and ANSI B16.2 specifications and are furnished in stock materials including soft iron, low carbon steel, 4-6 chrome (F5), 304 & 304L, 316 & 316L, 347, 410, Monel, Inconel and Incoloy.

UNLESS OTHERWISE SPECIFIED, GRUV-TITE FORGED SEAMLESS RING JOINT GASKETS WILL BE FURNISED IN OVAL DESIGN.