Hello,
What standards are you working too would be the first question. I think that will be very important to get a clear answer here.
Second question is what does the engineer think about it? If its for a standoff support in general it would probably not be a problem. BUT that of course depends on size and type of materials, weight of whats being transfered in said pipe, stability of foundation, is it pressurized in service etc. In other words refer to the second question...what does the engineer on the project want to do. Please provide a bit more detail.
I agree with TommyJ,
I dont think you'll find the answer you need in any code (Which one are you using?) or from anyone here. Your best answer and the one that matters most will come from the Engineer or design group in charge of the project.