API Ring Number Size of Flange, Inches
720-960,2000 lbs. 2900 lbs. 3000 lbs. 5000 lbs.
RX 20 1-1/2   1-1/2 1-1/2
RX 23 2      
RX 24     2 2
RX 26 2-1/2      
RX 27     2-1/2 2-1/2
RX 31 3   3  
RX 35       3
RX 37 4   4  
RX 39       4
RX 41 5   5  
RX 44       5
RX 45 6   6  
RX 46       6
RX 47       8*
RX 49 8   8  
RX 50       8
RX 53 10   10  
RX 54       10
RX 57 12   12  
RX 63       14
RX 65 16      
RX 66     16  
RX 69 18      
RX 70     18  
RX 73 20      
RX 74     20  
RX 82   1-1/2    

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.