HUB FOR ESDV AND SPACERS

Please could anyone explain the meaning of this materials. Please see attached screenshot.

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ESDV : Emergency Shutdown Valve

HUB : It's the female end of the pipe. The inside diameter of the hub is designed to be the size of the outside diameter of the pipe.

1500# see the link below.
https://www.pipingonline.com/flanges/flange-pressure-rating-asme/?fb_comment_id=1646788515414717_1686123528147882

Spacers:
http://www.psi-linedpipe.com/spacers.htm

Greetings,

Danny

 
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