Use of high alloy steels only in chemical industry is justified but not enough. Choice of adequate steel type is  only an incomplete success. To assure durability of installation surfaces, it is necessary to adequately process them, using pickling , passivation or  process. These processes increase corrosion resistance of steel even in highly aggressive environments. Use of   gives here the best results. Besides  has many features: improves equipment aesthetics and   facilitate keeping them clean, what reduces costs of their maintenance and overhaul.