NF F37-029:1971 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS FOR CHEMICALS CARRIED AT ATMOSPHERIC PRESSURE BUT ISOLATED FROM THE ATMOSPHERE. DOME COVER FOR COCKS FIXED WITH BOLTS. FILLING AND DRAINING ORIFICES 80 MM IN DIAMETER.
2003NF F37-100-5:2003 Railway applications - Tank wagons - Part 5 : top devices for bottom emptying and top filling of liquid products.
1971NF F37-029:1971 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS FOR CHEMICALS CARRIED AT ATMOSPHERIC PRESSURE BUT ISOLATED FROM THE ATMOSPHERE. DOME COVER FOR COCKS FIXED WITH BOLTS. FILLING AND DRAINING ORIFICES 80 MM IN DIAMETER.