Pop open the hood of most any US vehicle made in the last 40 years and check out the power steering hoses.On V-8's especially,the hoses are right in front of the exhaust manifold on either side of the engine.The pressure on the hi side is way more than engine oil pump pressure.Are there fires caused by power steering hose leaks?Yes,I've seen a few,but considering the 10's of millions of vehicles on the road with old cracked hoses,it's not all that common.
Some newer vehicles use remote filters with hoses,4x4 Blazers and S10's for sure as do many heavy duty trucks.And although very rare,hard lines can fracture from the constant cycling of the oil pump pressure and engine vibrations.
Hoses are a maintenance issue,they don't last forever,using quality hoses,ie,braided type brand names and replacing them every 5 years or so should keep the fires to a minimum,lol.
