Can your vessel / heat exchanger software perform tubesheet calculations per Part UHX of ASME Section VIII Division 1, latest edition?
PD5500 local load calculations include an option for the "ECCS" method. Can you please advise what the ECCS method is and how it functions.
It is permitted to use either A.188.8.131.52 Limits based upon 3.6 or A.184.108.40.206 Alternative limits based upon ECCS rules to calculate the permissible longitudinal compressive stress. If the ECCS method option is set to Yes then the limits are calculated as per PD5500 A.220.127.116.11 using a value of w/l of less than 0.01. If it is set to No, they are calculated from Figure A.2.
External Loads on Horizontal Vessels: how do I calculate the effects of wind loads on my vessel?
To consider wind loads on horizontal vessels two approaches are possible:
1.The wind shear can be considered as an equivalent acceleration, where acc = Shear/Weight
2.For simple vessels, the wind shear can be input as a single concentrated load acting at the centre of the vessel.
Nozzles & Openings to PD5500: the available nozzle thickness eab is less than the required thickness erb, but Finglow output states that it is an acceptable calculation?
In cases where the reinforcement limit Lb extends beyond the projection of the nozzle, the distribution of the reinforcement will be modified to concentrate the material close to the opening in accordance with 18.104.22.168.4(a) - see also Figures 3.5-29 and 3.5-30. The areas of fillet welds will be included where relevant.
Would you please clarify in what cases should we input "Yes" in "Pressure Load" field of this module.
Normally, tabulated nozzle loads or loads from a piping analysis include the pressure thrust on a nozzle, if this is the case, the option Pressure Load should be set to No. If it is required to add the pressure load of a 'blanked' nozzle to the radial load input set this option to Yes.