... ,ASTM,SAE,DIN or special requirements from Customers.1) Chain wheel, gear wheel, sheave, idler wheel, platen, winding drum, helm seat etc. for deck ... petrochemical industry working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) Fire grate car, carrier wheel, driving chain, chain wheel etc. for ... declared NK,DNV,BV,ABS,CCS,Germany classification society attestation. chain wheel