3.16. Instrument piping
Piping specification should apply up to and including the first block valve(s) from the process lines or equipment.
The limit and type of piping for instrument connections should be in accordance with ASME B 31.3.
Pressure points should be as short as possible. Long connections, if unavoidable, and connections to vibrating lines should be properly braced.
3.16.1. Instrument connections
3.16.2. Level and contents (level gages)
1. The connection for external float and displacer chambers should be in accordance with standards. Branch connection should be DN 50 (NPS 2).
2. Level gages should be connected with block valves to the equipment. Level gages in PN 150 (pressure rating, 900) and higher should have a double block valve.
Get Natural Gas Processing now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
