Nozzle Load Nema

Nozzle loads are the forces and moments that the piping system exerts on the equipment nozzles.

Spray gun nozzle kecil. Api standard 617 2002 the standard code for centrifugal compressors for petroleum chemical and gas service industries quotes nema sm23 for the stipulation of piping loads and recommends 185 times the allowable limit of nema sm23. Nozzles for turbines to be checked for individual loading as well as. Individual component forces fx fy fz and mx my mz each component at each nozzle at nozzle point must be within the limit specified in code.

Per nema 2324 maximum allowed forces and moment on each individual nozzle are directly proportional to nozzle dia if less than 8 inches and increase by 13 dia if dia is greater than 8 inches. The main and the most important part of the analysis phase is nozzle load checking. Brazed aluminium plate fin heat exchangers.

One of the important qualification requirements while stress analysis of a piping system is to keep these loads and moments within a given allowable limit that is known as nozzle load allowable values. Nema sm23 for turbines provides guidelines and equations which helps in cross verifying the external moments and loadings on a nozzle. The casing of a steam turbine or a power recovery turbine in an fcc plant for instance tends to be quite thin and very hot in the fcc case consequently local casing deformation and blade contact are a real risk with excessive nozzle loads.

That batch report checks the nozzle loads to the equation below with the force and moment resultants. Deq 16 dia3 if dia 6 deq 600 if dia 8 deq 800. However if one or more components of the forces and moments are still exceeding same shall be approved agreed with the vendor.

The minimum allowable nozzle loads for rotary positive displacement compressors is generally taken as 185 times nema sm23 values. In general practice compressor nozzles are to be qualified by api 617 or nema sm 23. Regarding a nema limited compressor the casing is usually very robust and the weak point is commonly the frame or plinth.