Exchangers shall be grouped together wherever possible.
Heat exchangers should be located perpendicular to the pipe rack on the outer row to facilitate pulling of tube bundles with mobile crane or by other means.
They should have a longitudinal clearance of at least one-meter plus the length of removable bundles in front of the tube bundle removal side. Plant access roads may be utilized for tube bundle pulling areas, so long as alternate access is available to any potentially isolated area. Fire truck routes shall not be used as pulling areas.
Thermo-siphon reboilers should preferably be placed close to their associated towers.
Wrench clearance shall be provided between channel nozzles and required valves, with the valves clear of removal areas.
If underground cooling water connections are provided to the bonnet, fixed saddle support should be towards cooling water header side. Otherwise decide fixed saddle support location based on piping flexibility.
Piping shall be arranged so that they do not hinder removal of shell end and channel cover and withdrawal of tube bundle. Piping, except removable local interconnections, shall not be run over channel or shell cover areas, or in the way of built-in or mobile handling facilities.