Bullet points, bullet lists

Is there a correct English format for bullet or number lists? I prepare technical documents and manuals with many bullet lists. I use bullets when no sequence is required. I use numbering when a sequence is needed.

After bullets should punctuation follow with nothing, comma, or semicolon?

The example below shows the many different standards that I come across. I would like to know if there is an accepted standard.

EXAMPLE:
The *** system contains the following parts:
- Tank A [no punctuation]
- Manual valve type 1; [semicolon]
- Automatic valve 2A, [comma]
- Drain line X, and [if punctuation is necessary should ‘and’ be used here?]
- High pressure vessel SS. [period, particularly for the last bullet item]

I tried a search on this site but I was unable to find information on this issue.

Your feedback is appreciated!

Good day,

Tim