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ACO Viet Nam

Cleaning and maintenance of stainless steel drainage

Cleaning Maintenance01

Introduction

Principles of cleaning

Cleaning chemicals

Overview with recommended cleaning procedures for drainage

These instructions are for guidance only. Always follow manufacturer's instructions.
All procedures have to be verified and adjusted to the application specifics.

Frequency

Procedure

Physical agents

Chemical agents

Examples of chemical cleaning agents suitable for ACO stainless steel drainage

Daily

Removal of organic deposits (fats, proteins, saccharides and polysaccharides)

  • Steam
  • Medium pressure water to max 25 bar
  • Mechanical / kinetic energy (brushes, CIP medium velocity)
  • Caustics

(sodium hydroxide, potassium hydroxide)

  • Detergents / surfactants

Standard chemical agents used for floor cleaning should be sufficient (should be validated) Oxofoam, Endorochlor (Diversey)

Weekly

Removal of inorganic deposits that could promote very resistent biofilms

Mechanical abrasive methods – polishing

  • Nitric acid for stainless steel passivation where chlorine attack could be expected
  • Inorganic acids (phosphoric acid)
  • Weak organic acids
  • Acifoam (Diversey)
  • Acigel (Diversey)
  • Super Dilac (Diversey)

Note

Removal of rinse water residues

Removal of excess water with a squeegee

Alcohols (isopropylalcohol, ethanol)

Chlorine tablets (Suma Tab D4 by Diversey) are often added to the water in foul trap in microbial sensitive production area‘s

Any cleaning procedures, including those recommended by equipment suppliers, must be properly validated at the equipment, where it will be applied and on the soil that could be expected even after certain time of usage.

Always follow manufacturer's instructions to avoid damage to the equipment.

Material Resistance

Note:

Concentration levels and length of exposure have a direct influence on the resistance of stainless steel to certain chemicals. Each application should therefore be carefully reviewed to determine the suitability of stainless steel.

Data presented are used as a guide only.

1 = Very good service to operating limit of material

2 = Moderate service

3 = Limited or variable service

4 = Unsatisfactory

AISI 316 L Stainless

AISI 304 Stainless

EPDM

NBR

FPM

TPEV

Acetone

1

1

1

4

4

1

Acetic acid (diluted) 30%

1

1

1

2

2

1

Acetic acid 100%

1

1

1

3

3

1

Acetic acid anhydride

1

1

2

3

4

2

Aluminium chloride

4

4

1

1

1

1

Aluminium sulfate

1

4

1

1

1

1

Ammonium carbonate

1

1

1

4

2

1

Ammonium chloride

2

3

1

1

1

1

Ammonium hydroxide

1

1

1

4

2

1

Amyl chloride

1

1

4

4

1

4

Anilin

1

1

2

4

3

1

Anilin hydrochloride

4

4

2

2

2

2

Barium chloride

2

2

1

1

1

1

Barium hydroxide

1

1

1

1

1

1

Benzaldehyde

1

1

1

4

4

1

Benzene

1

1

4

4

1

4

Benzoic acid

1

1

4

4

1

1

Borax

1

1

1

2

1

1

Boric acid

1

1

1

1

1

1

Bromine

4

4

4

4

1

4

Bromine chloride acid

4

4

1

2

1

2

Bromine hydrogen acid

4

4

1

4

1

2

Bromoethylene

1

1

-

-

-

-

Butanol

1

1

4

1

1

3

Butyl acetat

1

1

2

2

4

3

Butyric acid

1

1

2

4

4

3

Calcium bisulfate el sulfite

1

1

4

1

1

1

Calcium chloride

2

2

1

1

1

1

Calcium hydroxide

1

1

1

1

1

1

Calcium hypoklorite

2

3

1

3

1

3

Carbon disulfide

1

1

4

4

1

3

Carbon tetrachloride

1

1

4

3

1

4

Chloracetic acid (mono)

4

4

2

4

4

2

Chloride

4

4

-

-

-

-

Chloril acid

4

4

1

4

-

3

Chlorine (dry)

1

1

1

2

1

4

Chlorobenzene

1

1

4

4

1

4

Chloroform

2

2

4

4

1

4

Chlorosulfonic acid

2

3

4

4

3

4

Copper chloride

2

2

1

1

1

1

Copper nitrate

1

1

1

1

1

1

Copper sulfate

1

1

1

1

1

1

Ether

1

1

3

4

3

3

Ethyl chloride

1

1

1

1

1

3

Fatty acid

1

1

4

2

1

1

Fluorine (dry)

1

1

-

-

-

-

Fluorine hydrogen acid

4

4

2

4

1

4

Formaldehyde

1

1

1

2

1

1

Formic acid

1

1

1

2

3

2

Furfural

1

1

2

4

4

4

Gallic acid

1

1

2

2

1

2

Hydrochloric acid

4

4

1

4

1

1

Hydrogen peroxide

1

1

3

4

2

3

Iodine (wet)

4

4

2

2

1

2

Lead acetate

1

1

1

2

4

1

Magnesium chloride

2

2

1

1

1

1

Magnesium sulfate

1

1

1

1

1

1

Mercury

1

1

1

1

1

1

Methanol

1

1

1

1

3

1

Methyl chloride

1

1

3

4

1

3

Methylene chloride

2

2

4

4

2

4

Natphalene

1

1

4

4

1

1

Nickel chloride

2

2

1

1

1

1

Nickel sulfate

1

1

1

1

1

1

Nitric acid

3

3

3

4

1

4

Oxalic acid

3

3

1

2

1

2

Perchloric acid

4

4

2

4

1

1

Phorsphor acid

1

1

2

4

1

1

Picric acid

1

1

2

2

1

2

Potassium bromide

1

1

1

1

1

1

Potassium carbonate

1

1

1

2

1

1

Potassium chlorate

1

1

1

1

1

1

Potassium cyanide

1

1

1

1

1

1

Potassium hydroxide

1

1

1

2

2

1

Potassium nitrate

1

1

1

1

1

1

Potassium permanganate

1

1

1

3

1

1

Potassium sulfate

1

1

1

1

1

1

Potassium sulfide

1

1

1

1

1

1

Potassiumchloride

2

2

1

1

1

1

Prophylene dichloride

1

1

4

4

1

4

Sal ammoniac

2

3

1

1

1

1

Silver nitrate

1

1

1

2

1

1

Soda (ash)

1

1

1

1

1

1

Sodium acetate

1

1

1

2

4

1

Sodium bicarbonate

1

1

1

1

1

1

Sodium bisulfate

1

3

1

2

1

1

Sodium bisulfite

1

1

1

1

1

1

Sodium bromide

2

2

1

3

1

2

Sodium chlorate

1

1

1

2

1

1

Sodium chloride

4

4

1

1

1

1

Sodium cyanide

1

1

1

1

1

1

Sodium fluoride

1

1

1

1

1

1

Sodium hydroxide

1

1

1

2

2

1

Sodium hypoklorite

4

4

2

2

1

1

Sodium nitrate

1

1

1

2

2

1

Sodium sulfate

1

1

1

1

1

1

Sodium sulfide

1

1

1

1

1

1

Sodium sulfite

1

1

1

1

1

1

Stannicous chloride

2

3

2

1

1

2

Sulfur

1

1

1

4

1

1

Sulfur chloride

1

1

4

3

1

3

Sulfur dioxide

1

2

1

4

1

1

Sulfuric acid

4

4

2

4

1

3

Sulfurous acid

1

3

2

2

1

2

Tionyl chloride

1

1

4

4

1

4

Toluene (toluol)

1

1

4

4

1

4

Trichloroethylene

1

1

4

3

1

4

Turpentine

1

1

4

1

1

4

Xylene (xylol)

1

1

4

4

2

4

Zinc sulfate

1

1

1

1

1

1

Sealing material information

Sealing materials

EPDM

NBR

FPM (Viton®)

TPEV

Colour

black

black

green

red

Temperature range

-50 / +130 / +150 °C

-30 / +80 / +100 °C

-20 / +200 / +300 °C

-35 / +120 / +140 °C

Resistance

Water

excellent

good

good

excellent

Chemicals

Acids

good

fair

excellent

good

Bases

good

fair

excellent

excellent

Benzene/Petrol

unsatisfied

excellent

excellent

limited

Oils

ASTM Oil No. 1

unsatisfied

excellent

excellent

limited

ASTM Oil No. 3

unsatisfied

excellent

excellent

limited

Ozone & weather stresses

good

limited

good

good

To be sure of suitability for special applications please consult exact seal material features within ACO installation guide.