Di Nicola manufactures Three flanges dismantling joints in ductil iron EN GJS 400, in EN GJS 500 , EN S275J0 in construction steel and stainless steel AISI 304 , 316 , Duplex and Super Duplex , with sizes ranging from 100 to 2800 mm and nominal pressures from 2.5 bar to 64 bar with flanges according to EN 1092-2 , ISO 2531, BS4504 , ANSI B16.10 , test according to EN 12266-1 . Di Nicola develop non-standard joints at the request of customers .