Thrust loads and moments imposed on equipment shall include all loading effects and shall not exceed the equipment manufacturers recommended values. Thermal movement at the equipment nozzle shall be obtained from the equipment manufacturer or calculated with the data known for the equipment.
When acting loadings are over the allowable values, according to the applicable standard or code, approval shall be obtained from the manufacturer. In the absence of vendor data, relevant codes like API 610, API 621, NEMA SM23, API560, API661 etc. or any other approved proven international code/practices.
NOZZLE LOADING shall be as per Company Standard.
There is no clear established limit for earthquake loads acting on equipment connections in Codes or Practices. If calculated loads exceed the standard allowable, engineer considerations shall be taken or approvals should be obtained from the Mechanical suppliers on an individual basis.
In determining acting loads on vessels connections, local flexibility of vessel walls may be taken into account, when equipment drawings show that no stiffening other than internal or external vessel stiffeners is present in the vicinity of the connections. Local flexibility shall not be used for connections other than perpendicular to a circular vessel wall.
Piping connected to nozzles from vertical static equipment running next to the equipment wall shall preferably be supported by means of a bracket close to the nozzle to unload the nozzle from weight and other sustained loadings.