I request to inform what are the tests are normally offered by AFC manufacture as part of FAT (at shop) & SAT (at site). Request to provide list for mandatory & non-mandatory (optional good to ensure reliability).
Hi SnTMan, I will like to add one point the welded thickness of flange needs to consider while work out MDMT (Minimum Design metal Temp.). This may call for Impact test requirement.
Regards, dinesh
Hi TGS4, In line with your explanation of start and stops. Does it make any difference if starting/stopping of boiler is at slower or too slower speed? I mean if speed is made slower so is it possible to extend fatigue life of the equipment? I request to share if you have some definition of the...
In my opinion, in case of non welded parts only T/4 to be considered. But if it is welded then welded thickness criteria needs to be considered. (maximum of T/4 and tw).
In case of attachment on Stainless vessels there may be requirements stated in the client specifications also. This is to avoid direct welding of CS parts on the stainless steel body parts (i.e. shell, dish plates).
In case of ATM pressure case, there will be pressure at bottom parts of vessel due to the liquid head based on the height of liquid above it. If liquid is heavier than water then specific gravity needs to be considered for static pressure of liquid. Also make there is not a possibility of vacuum...
As per my view based on bearing pressure limit of floor/surface on which beam resting, you have to workout the length up-to which applied load transferred to floor safely. Based on this UDL and worked out length you can work out bending moment on beam. Then by use of BM and sec-modulus you can...
In case of dynamic seal (sliding) bigger dia O-ring is better to use to have longer service life. As per my understanding smaller dia O-ring need much accurately manufactured metal parts. So in this case if you use larger dia O-ring then there is more compression is possible (in terms of...
You may need to use chain pulley block at tailing lug. Once the vessel in air slowly losing the chain of chain pulley block. Certain safety precautions need to take while loosening the chain pulley block. I guess experienced fellow of construction team will get idea of this.
Considering the situation & proper care is taken for the induced stress, the proposed solution looks smarter. In case of some specification the client is also asking to remove the lifting lugs after finish of installation. This solution will become a good development in the practice.
In my opinion, Lifting lugs on nozzle flanges shall not be applied. If applied then further analysis of nozzle, shell/head local stress needs to analyze. The real practice different client's specifications are in favor to apply lugs on head or shell (as a lifting trunion incase of heavy loads)...
I agree with RipZ who stated "It all depends on your interpretation of the code, as it does not clearly state whether it considers grinding welds flush as cosmetic or not." As per opinion, how you convince this to AI. So it's solely based on the judgment/policy of AI if grinding is not affecting...
