can i use this chart for HC 110 :
http://www.chrisjohnsonphotographer.com/charts.shtml#anchor30675
If i understand correctly dilution of 1:7 means dilution B?
HC-110 dilution B works well. If there is a "standard" dilution, it is dilution B.
Many here will use different dilutions. I'm currently using the 1 + 49 dilution that APUG's own Jason Brunner has on his website:
http://www.jasonbrunner.com/hc110.html
The link you posted refers to what one does if one first makes an intermediate stock solution from the thick(ish) syrup that comes from Kodak. Many/most of us here prefer to work straight from the concentrate, because the concentrate takes very little space and keeps just about forever. If you make the intermediate stock solution, it doesn't keep as long.
If you make dilution B from the concentrate, you add one part concentrate to 31 parts water. If you make Jason Brunner's 1 + 49 dilution, you add one part concentrate to 49 parts water. Either way, the trick you need to master is measuring small quantities (say 6 ml) of the thick, viscous concentrate. It is not hard, just finicky.
If you use dilution B, all Kodak and third party information about times and temperatures will apply. If you use higher dilutions, the developing times will be longer (which is good).