Bi-directional orifice plate assembly

An orifice plate assembly for an orifice fitting comprising:

• a first ring member comprising a first facing surface and a first plurality of arms extending away from the first facing surface, said arms including latching portions;
• said first ring member further comprising latch-receiving recesses;
• a second ring member comprising a second facing surface and a second plurality of arms extending away from the second facing surface, said arms including latching portions;
• said second ring member further comprising latch-receiving recesses;
• an orifice plate disposed between said first and second facing surfaces of said ring members;
• a first seal assembly disposed between the first ring and the orifice plate;
• and
• a second seal assembly disposed between the second ring and the orifice plate;
• wherein said latching portions of arms of said latching portions of said arms of said second ring member engage the latch-receiving recesses in said first ring member.

An orifice fitting comprising:

• a tubular body having a through passage;
• and
• an orifice plate assembly removably disposed within the tubular body across the through passage, the orifice plate assembly comprising:
• an orifice plate disposed between a first ring and a second ring;
• a first seal assembly disposed between the first ring and the orifice plate;
• a second seal assembly disposed between the second ring and the orifice plate;
• and
• a plurality of latching members extending from each ring to engage the other ring.