Location plan for roof manholes (bocas de visita) on storage tanks T-12, T-13, T-15, T-17, and T-21 at the CSN Tar Plant. We’ve included specific plan views for each tank at scales of 1:25 and 1:50. The layout shows nozzle (bocal) positioning relative to tank shell (costado) and centerlines. Technical notes specify AWS E-7018 electrodes and welding symbols per AWS standards. Tolerances follow ABNT NBR-6371 (medium precision). Painting requirements are according to CSN EG 000111, using scheme EP2 with aluminum finish for nozzle caps and flanges. Dims are in mm. Planta de locação de bocas de visita para tanques de alcatrão T-12 a T-21.
CSN Tar Plant Tank T-12 to T-21 Roof Manhole Plan
