rizwanh
Petroleum
- Aug 21, 2008
- 4
All,
I'm a pipeline engineer. very new actually. forgive me if my english is not good, as english is not my first language.
i need your help on designing reinforced wye. initially our client wants us to design a fabricated, reinforced tee with 12" pipe welded to a 24" pipe. I've looked into B31.3 and manage to determine the required thickness for full circumferential pad over the 24" pipe.
Now they want it to be piggable, therefore change it into a 30 degree wye. as per B31.3, minimum requirement is at least 45 degree for a fabricated branch. as far as i've searched,i couldn't find a wye design method/calculation is B31.3 nor in B31.4. I intend to use FEA with Abaqus to design the reinforcement and validate it with BPV Code, Section 3 (if not mistaken), article 4. The pig goes from the 12" to the 24"
My question is:
1. What is my base, reference, to design any reinforcement and analyze with FEA, because if i follow B31.3, there is method such as pad, saddle or sleeve type? should i follow any of these 3? since my gut feelings says that the welded part will not be that strong since the 12" pipe WT is only 7.6mm after corrosion. therefore i intend to add reinforcement to the 12" branch, instead of just on the 24" line.
2. Can i use calculation n B31.3, but instead of minimum 45 degree, i use 30 degree. will it be acceptable?? (i think it will not, but just asking if possible).
3. is there any other possible method to design fabricated, reinforced wye?
Look forward for your advice.
Thanks.
I'm a pipeline engineer. very new actually. forgive me if my english is not good, as english is not my first language.
i need your help on designing reinforced wye. initially our client wants us to design a fabricated, reinforced tee with 12" pipe welded to a 24" pipe. I've looked into B31.3 and manage to determine the required thickness for full circumferential pad over the 24" pipe.
Now they want it to be piggable, therefore change it into a 30 degree wye. as per B31.3, minimum requirement is at least 45 degree for a fabricated branch. as far as i've searched,i couldn't find a wye design method/calculation is B31.3 nor in B31.4. I intend to use FEA with Abaqus to design the reinforcement and validate it with BPV Code, Section 3 (if not mistaken), article 4. The pig goes from the 12" to the 24"
My question is:
1. What is my base, reference, to design any reinforcement and analyze with FEA, because if i follow B31.3, there is method such as pad, saddle or sleeve type? should i follow any of these 3? since my gut feelings says that the welded part will not be that strong since the 12" pipe WT is only 7.6mm after corrosion. therefore i intend to add reinforcement to the 12" branch, instead of just on the 24" line.
2. Can i use calculation n B31.3, but instead of minimum 45 degree, i use 30 degree. will it be acceptable?? (i think it will not, but just asking if possible).
3. is there any other possible method to design fabricated, reinforced wye?
Look forward for your advice.
Thanks.
