Chemical processing

Corrosion resistant stainless steels and alloys from Outokumpu are successfully used for all types of tanks and pressure vessel applications within the chemical process industry: 

• tanks for storing or processing chemicals 
• tanks with high pressures or temperatures 
• cryogenic tanks  

Try the storage tank calculator to calculate and compare material options for storage tanks. It is an easy way to see and learn how your selection of steel grade affects material consumption and cost.  

By use of physical, chemical and biological methods, pollutions are removed from wastewater for recovery and reuse or legal discharge of complying with national standards. Wastewater comes from living and industries.

Domestic sewage generally does not contain toxic substances, but contains organic substances such as starch, protein, sugar and mineral oil. Indexes of BOD (biological oxygen demand), COD (chemical oxygen demand), TP (total phosphorus) and TN (total nitrogen) are also higher. Stainless steels core 304L and Supra 316L are used for domestic sewage treatment, Supra 444 and Forta LDX 2101 are possible alternatives.

Pollutants in industrial wastewater mainly include suspended solids, dissolved salts, acid, alkali, heavy metal ions, halide ions and the other organic chemicals, more complicated than those in domestic sewage.

Supra 316L, Forta DX 2205 and SDX 2507 as well as Ultra 254SMO are used for the treatments of industrial wastewater, whose dissolved chlorides lead to corrosion with their concentration rising. Choice of steel grades depends on compositions of pollutants. Ultra 654SMO is applicable to more corrosive conditions.