Model of creation a multilayer structure for production of building pipes Valery Dyadichev, Andrey Kolesnikov, Aleksandr Dyadichev, Sergey Menyuk and Ekaterina Dyadicheva MATEC Web Conf., 251 (2018) 01006 Published online: 14 December 2018 DOI: 10.1051/matecconf/201825101006