Why not? Put them in the ground instead of on the ground. Or put a heap of sand on them to absorb the blast.

Yeah buried pipelines are common but I can’t imagine Iran is going to let them be built without interference. Also, a 2000 mile buried pipeline can take 2-3 years to build and that’s without account for 2-5 years of planning, permitting and land acquisition phase. None of this is going to happen soon.