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  1. rides426

    Hot Tap Blind Flange ?

    Hello, Does anyone know if B31.3 or B16.5 will allow me to weld onto a blind flange for the purposes of hot tapping. I'd like to weld a 20" weldolet onto a 24" blind flange and then install a 20" valve and hot-tap the 24" blind. Shutting down the process will cost about $1,000,000 so that's...

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