Seán Moran, in Process Plant Layout (Second Edition), 2017 35.4 Analysis Methods 35.4.1 General Pipe Stress AnalysisĪll pipes operating above ambient temperature undergo thermal expansion in service. Piping runs that place loads of any sort on the air fin structures should be avoided if possible or communicated to the vendor as soon as possible. These should be treated in the same way as snuffing steam to heaters for example, the valves should be located at least 15 meters radius from the perimeter of the air fin. Sometimes, air fins handling light hydrocarbons require a snuffing steam supply. Īny valves required to isolate units are the best located on the unit nozzles.They usually can be supported off the air fin legs beneath the header box platform. Outlet headers are less of a problem because the temperature is lower and the pipe size usually much smaller.
Support from the rack steel is between the header boxes. Ensure that the air fin is capable of accepting the movement imposed on the header. The preferred position for the header is directly above the inlet nozzles, keeping the branches as short as possible. The header must be flanged at intervals along its length to facilitate the removal of units by crane for maintenance. Supports usually can be attached to the steel members that run between units and therefore are short and minimal.
Calculate anchor loads with expansion joints series#
Thus, we have a series of off-takes sufficiently long to absorb expansion, at the same time, having the minimum of elbows resulting in minimum pressure drop.
(courtesy of Red Bag/Bentley Systems, Inc.)
0 kommentar(er)
