export *.asm to iges or similar without giving internal measures

[lupopeluah]

hi, I have a set (a valve) consisting of various components, a customer/supplier asked me to pass him the iges because he wants to insert my valve into his system but I do not want to cover the details and the internal measures. I tried to export in various formats but then taking them and putting them on the table the internal measures with a simple section are all available.
I would like to export only external surfaces... Help me?