"ggrindle (Mechanical) 21 Dec 06 9:02
I have been in similar situations and I simply had a shop fabricate a vessel out of a piece of pipe with some pipe caps. Given the small size and low pressure I did not even require them to stamp it as a pressure vessel...which cut the cost. Having it fabbed in a shop also allowed me to add the end connections I wanted."
I've did the same as ggrindle, I fabricate it myself by using a XXS pipe and caps (50 bar, 15" long x 4" diameter) and they were used as a sealing pot for instruments tubing.
Luiz