What does this mean?
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WELD NECK FLANGE, PN5.OMPA, RF, 20'' (NB/T47008), SH3406, S-80 BORE
Welded flange, PN5.0, 20 inches, RF type, (NB/T47008), SH3406, wall thickness SCH80
Even after reading this, it’s still not clear what material the flange is made of. . .
It should be PN5.0MPa
The original poster can search for it on Baidu using the standard number
Wafer lap joint flange, 5.0 MPa, raised face, nominal diameter 20”, lap joint thickness SCH80, material standard NB/T47008, manufacturing standard SH3406; no specific material grade specified
PN5.0MPa, 20#, welded flange with neck, SH3406 standard, flange sealing surface RF, flange stub wall thickness SCH80.
Waisted butt-welding flange, pressure class: 5.0 MPa, flange type: raised face, flange size: nominal diameter 20”, the thickness of the butted end corresponds to pipe grade SCH80; material standard is NB/T47008, and the manufacturing standard follows SH/T3406 for the petrochemical industry