Orifice flanges shall be minimum ANSI Class 300 RF rating and shall be provided with flange taps and jack-screws. Orifice flange facing and material shall be in accordance with piping specifications.

• 孔板法兰应为最小ANSI等级300RF额定值和配备法兰接头和顶丝。孔板法兰面和材料应根据管道规格要求。