How can I add meta tags in a subloaded page?

I need to add meta tags to a sub page that I load. Its an .asp page and in order for Facebook pixels to work I need to have meta tags in that page.

I have added the FB init code in my js file so it runs when the page loads.

  s.parentNode.insertBefore(t,s)}(window, document,'script',
  fbq('init', 'xxxxxxxxxxx');
  fbq('track', 'PageView');
fbq('track', 'ViewContent');

I have tried to add the meta tags with asp but the Fb code is not reading them.
So is there a way to add the or do I need to change the router to use componentUrl instead?