ABOUT HUBS AND CLAMPS

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Revised: 12/28/2007

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What Hub Does This Ring Gasket Fit?
Hub connections do not join using R ring gaskets.

(For Flange ring gaskets, click here).

For SBX ring gaskets see note at bottom of this document).

Ring Gasket

Fits This Hub

     
RX-20 1-13/16" 10M *,   1-13/16" 15M *
RX-23 2-1/16" 5M *,    2-1/16" 10M *,   
2-1/16" 15M *
RX-24 2-9/16" 5M *,    2-9/16" 10M *
    2-9/16" 15M *
RX-27 3-1/8" 5M *,   3-1/16" 10M *,
3-1/16" 15M *
RX-35 4-1/16" 5M *,   4-1/16" 10M *
RX-45 7-1/16" 2M  SR 1,   7-1/16" 5M *,   
7-1/16" 10M *,   7-1/16" 15M *
RX-49 9" 5M *,   9" 10M *
RX-53 11" 3M  SR 1 ,  11" 3M *,   
  11" 5M *,   11" 10M *
RX-57 13-5/8 3M  SR 1,   13-5/8 3M *,   
    13-5/8 5M *,   13-5/8 10M *
RX-65 16-3/4" 2M  SR 1,   16-3/4" 2M *,   
  16-3/4" 3M  SR 1,   16-3/4" 3M *,   
  16-3/4" 5M *
RX-73 20-3/4" 2M *,   20-3/4" 3M *,    
    20-3/4" 3M *,   20-3/4" 3M *,   
    21-1/4" 2M  SR 1,   21-1/4" 2M *,  
    21-1/4" 2M *,   21-1/4" 2M *
BX-151 1-13/16" 10M,   1-13/16" 15M,   
  1-13/16" 20M
BX-152 2-1/16" 5M,   2-1/16" 10M,   
    2-1/16" 15M,   2-1/16" 20M
BX-153 2-9/16" 5M,   2-9/16" 10M,   
  2-9/16" 15M,   2-9/16" 20M
BX-154  3-1/8" 5M,   3-1/16" 10M,   
    3-1/16" 15M,   3-1/16" 20M
BX-155 4-1/16" 5M,   4-1/16" 10M,   
  4-1/16" 15M,   4-1/16" 20M
BX-156 7-1/16" 5M,   7-1/16" 10M,   
   7-1/16" 15M,   7-1/16" 20M
BX-157 9" 5M,   9" 10M
BX-158 11" 5M,   11" 10M,   
    11" 15M,   11" 20M
BX-159 13-5/8" 10M,   13-5/8" 15M
BX-160 13-5/8" 5M
BX-161 16-3/4" 5M *
BX-162 16-3/4" 5M,   16-3/4" 10M
BX-164 18-3/4" 10M,   18-3/4" 15M
BX-165  21-1/4" 5M
BX-166 21-1/4" 10M
BX-169 5-1/8" 10M * 5-1/8" 15M *
* HUB NOT SPECIFIED IN API 16A
 1 SR defined
 

Note: Ring gaskets marked SRX and SBX have identical measurements to RX and  BX ring gaskets with the the same number designation, and they will fit the same corresponding connectors. The "S" indicates these gaskets have vent holes to allow reliable connector make-up underwater (subsea). API Spec 17D requires that manufacturers use only corrosion resistant alloy as the material for these gaskets.


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