The phrase "that serves for" is correct and can be used in written English.
You can use it to introduce a purpose or function for something, as in the following example sentence: This toolkit is designed to be used in the classroom, and serves for teachers to have a resource to draw upon when creating lesson plans.
There's a sketch in Jam that serves, for Davis, as a comic keystone.
The winding path of memory that serves for narrative structure can be disconcerting until we fall into its rhythm.
A combined-colour proof is then made by successively printing the several completed negatives on a sensitized white plastic sheet that serves for the final checking and review of all aspects of the map.
Therefore, only a single Attestation Identity Key is generated during setup that serves for platform attestation.
This improves the prediction capabilities of an embedded extended Kalman filter that serves for data fusion.
The UBAMPA is one of the Community Water Supply Organizations (COWSOs) that serves for Ubaruku and Mpakani villages.
London taxis that served for a million miles there barely lasted 18 months in Manhattan.
The Council has five veto-bearing permanent members — Britain, China, France, Russia and the United States — and 10 nonpermanent members that serve for two-year periods.
The wide street, lined on each side with garage-like concrete alcoves that serve for shops, was strewn with rubbish and, the Jocks discovered, eight separate IEDs.
Bush House, the Central London building that served, for some seventy years, as the home of the BBC World Service, was originally a trade center.
DETROIT — The former General Motors Centerpoint truck plant in Pontiac, Mich., is another empty building that served for years as a reminder of the declining fortunes of American automakers.
