Not in Ultra High Vacuum systems. There's no surface on the inside except glass or metall that can be outgased for some time at high temperature. Since we need

Not in Ultra High Vacuum systems. There's no surface on the inside except glass or metall that can be outgased for some time at high temperature. Since we need to heat the system to speed up the outgasing process, the expansion coefficients for the joints between metall and glass must be very closely matched.