Blank Flange with Ring Type Joint sealing face, Blank Flange RTJ for high rating class of ANSI B16.5 or ANSI B16.47 standard Class 600 900 1500 2500, usually the pressure from 600lbs have RTJ for blank (blind), very often using in blank of 600lbs 900lbs 1500lbs 2500lbs, Blank RTJ is different to Blank Raised Face
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