ALLOWABLE NOZZLE LOADs
ALLOWABLE NOZZLE LOADs
(OP)
I need to calculate the allowable load (forces & moments) at battery limits of a package (skid).
How can i do it?
Thanks
How can i do it?
Thanks
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RE: ALLOWABLE NOZZLE LOADs
What is on the skid?
RE: ALLOWABLE NOZZLE LOADs
cheers,
gr2vessels
RE: ALLOWABLE NOZZLE LOADs
By requesting the skid manufacturer to nomonate the allowable forces and moments, he will be defining the acceptable installation and operating conditions, removing any dispute he may have later should a warranty claim arise. In this instance be careful that the manufacturer does not come up with an unrealistically low set of values to protect his equipment but make your piping design hell. I recall some pump manufacturers (thankfully not API 610) asking for zero forces and zero moments from piping!
Conversely, we have specified the values to package suppliers at bid, requiring the nozzles to meet or exceed the strength requirements and offskid piping is designed to meet these limits. This is usually done when the schedule is tight and piping design must be ongoing before vendor data is available.
Regards,
Bill
RE: ALLOWABLE NOZZLE LOADs
This issue of allowable nozzle loads keeps popping up like an ugly foot-fungus....over and over again.
I have dealt with this issue (on and off) since 1972
I this it is very important that all "newbies" to this issue recognize this interplay between equipment vendors and A&E firms as a game. The A&E firms want to do a reasonable job. The equipment vendors are 1) afraid of extreme loads that will cause thier equipment to fail and 2)are motivated by additional money that can be squeezed from the client in "approving nozzle loads"
Both of these motivations prompt vendors to come up with inane requirements such as "Zero forces and moments"
BillBirch is on the right track. Ask for reasonable forces and moments at the bid stage...
-MJC
RE: ALLOWABLE NOZZLE LOADs
I do not believe for 1 minute that the manufacturer/vendor is motivated by anything other than ensuring the end user get a piece of equipment that will operate as it was designed and not suffer premature failure because of pipe / thrust loads.
All this means is that the pipe engineer designing the system does some work to come up with a design to eliminate or remove the loads rather than cutting corners and requiring units to carry in some cases unspecified and unrealistic loads.
I too have been involved with this issue over many years and have seen the results of pipe loads (many by accident not design)on pump equipment not designed to carry these loads.
RE: ALLOWABLE NOZZLE LOADs
I2I
RE: ALLOWABLE NOZZLE LOADs
L S THILL
RE: ALLOWABLE NOZZLE LOADs
L S THILL
RE: ALLOWABLE NOZZLE LOADs
You are putting yourself at risk (lawsuit) by posting those copyrighted materials. I hope PRG gave you permission.