Dear all;
Many thanks for your replys i am thinking about all what you say, the head is already rejected and until the vendor bring another head we just make some trials to solve the problem but after your opinions beside many other opinion the solution will be cancelled by using a new ELL...
Hello for all,
We a problem in a pressure vessel and we solved it but i am afraid that our solution may harm the base metal of the shell.
So we have a vessel with SA 516 Gr 70 material which I.D diamter is 3000 mm thk 20 and after fabricating the shell the ELL.HEAD arrived by error with I.D...
The pressure vessel is carbon 80 mm ( SA 516 Gr60 with 3 mm claded with SS 316 and we do heat treatment as below :-
Heat treatment as per UCS-56
MAX HEAT 222 C/HR
MAX NORMAL HOLDING TEMP IS 620 C
MAX HOLDING TIME IS 60 MIN
MAX COOLING RATE IS 280 C/HR
Very thanks Vikko ,
We will try another pickling technique but i wonder about plating ?
How can i make plating for stainless steel shell ?
And you talk about other chemical surface treatment beside pickling .
Hi Everyone ,
After the heat treatment process of pressure vessel which shell material is SS316 as per client requirements , the colour of the plates had been converted from stainless steel known colour to brown colour which is refused from both AI inspector and client so :
1- Do you know...
