At CAINOX, present in the Spanish market for more than 30 years, we are specialists in stainless steel drainage systems. Our effort and dedication have made the CAINOX® brand a name of recognized prestige for its quality and service.


The best guarantee of our products is the extensive list of projects carried out in all types of sectors: food industries, bottling plants, wineries, hotels, buildings in general... Projects with special requirements of sealing, hygiene, types of load, standard or custom-made products...


Achieving the satisfaction of our customers (engineering companies, construction companies and distribution warehouses) is our day-to-day work.


Our more technical website, accessible to all sectors of the market and constantly updated, includes downloadable technical data sheets of our products for easy consultation, making it a useful tool for all our customers.

Cainox en la Feria Internacional de la Cerámica y Baño Cevisama Valencia

Cevisama 2020

Cevisama 2023

Stainless Steel

  • Low weight, high strength 

Despite their small and practical weight, CAINOX stainless steel products are very robust and offer the advantage of being a strong material that is easy to handle and install. CAINOX drainage products are manufactured in AISI 304 grade stainless steel, and for the most demanding environments in AISI 316L grade.

  • Flow rate, hygiene and easy maintenance

With the right treatment, stainless steel has an exceptionally smooth surface that ensures excellent flow capacity, which in turn minimises dimensions. This, combined with the ease of cleaning and maintenance, makes stainless steel the ideal choice for drainage installations.

  • Quality, long service life and lifetime savings 

CAINOX stainless steel solutions are also competitive in price. Calculating installation time, maintenance and service life, over a realistic period of say 50 years, stainless steel solutions are unrivalled.

  • Environmentally friendly 

Stainless steel is 100% recyclable and non-toxic. Should the system require replacement parts, disposal of the materials is not an ecological problem.

  • Fire safety 

Stainless steel withstands extremely high and extremely low temperatures. Able to withstand temperatures in excess of 800°C, stainless steel is classified as a fire resistant material.

  • Design

If you are looking for an elegant, high-tech style, stainless steel is the best choice. Stainless steel is a classic and timeless material in terms of design.

  • Description of the material

Material designationAISI 316-LAISI 304
Carbon (C%)Max. 0,03Max. 0,08
Chromium (Cr%)16,0 - 18,018,0 - 20,0
Nickel (Ni%)10,0 - 14,08,0 - 10,5
Molybdenum (Mo%)2,0 - 3,0-
Silicon (Si%)Max. 1.0Max. 1.0
Manganese (Ma%)Max. 2.0Max. 2,0
Sulphur (S%)Max. 0,03Max. 0,03
  • Physical properties

Structure  Austenitic (non-magnetic)Austenitic (non-magnetic)
Specific gravity(lb/in³)(g/cm³)0,288 (7,98)0,285 (7,9)
Melting point(ºF)(ºC)Approx. 2552 (Approx. 1400)Approx. 2552 (ca. 1400)
Intraganular corrosion point(ºF)(ºC)1472-1580 (800-860)1472-1580 (800-600)
Coefficient of expansion (68-212 ºF)(in/inºF)20-100º (m/m. ºC)9,2-10,6 (16,5-10-6)8,9-10-6 (16,0-10-6)
Specific resistance (68ºF)(micrascm)20ºC (ohm-m²m)72 (0,75)72 (0,73)
Conductivity (68ºF)(BTU/Fh-ft)20ºC (W/ºC-m)8,7 (15)8,7 (15)
Specific heat(BTU/lbºF)(J/g-k)0.12 (0,5)0.12 (0,5)
   Prop. Physical at 20ºCProp. Physical at 20ºC
  • Mechanical properties

Tensile strength(100lb/in²)CRm(N/mm²)71-100(490-690)73-102(500-700)
Elongation limit(027yield)(10000lb/in²)Rp02(N/mm²)27(190)29(195)
Modulus of elasticity (e) (68ºF)(1000lb/in²)E(20ºC)(N/mm²)28,4-10³(2,0-10-5)28,4x10³(2,0-10-5)
  • Corrosion resistance

Austenitic chromium-nickel steel (AISI-304) is the most widely used of the stainless steel grades, as it has very good corrosion characteristics, and is therefore used in various sectors, for example in the food industry, shipyards, chemical and pharmaceutical laboratories, breweries and dairies, as well as in hospitals and industrial kitchens. 

If a higher acid resistance is required and there is a risk of corrosion, chrome-nickel steel with a molybdenum alloy can be used. (AISI-316 L)

  • Resistance to deformation

The resistance to deformation of stainless steels (AISI-304 and AISI-316L) is of high structural quality at any temperature. 

It is also resistant to deformation caused by shocks or heavy loads and therefore tends to deform slightly but not to break.

  • Fire resistance 

Stainless steel is non-flammable 

Classification: Stainless steel tubes

DIN 4102: Fire class A1 - non-flammable

DIN 1986, T4: non-flammable.

This means that stainless steel pipes and drains do not require fire insulation.
In case of fire in stainless steel installations, the gases produced are not harmful.

  • Temperature resistance 

Due to their low coefficient of expansion, stainless steel products for sewage pipes are not affected by temperature changes. Furthermore, these products do not need to be installed at specific temperatures.

The following table is based on laboratory investigations with pure chemical materials and should therefore be considered as a universal method. 

A = Very good constancy for the limit values of materials

B = Moderate constancy

C = Limited or variable constancy

D = Minimum constancy

 AISI_316LAISI_304Cast ironPolyethylenePVCPolypropyleneEPDMNBRFPM
Butyl acetateAABDDDB*D
Lead acetateAABAAAAB*
Sodium acetateAABAAAABD
Acetone      AAADDBADD
Acetic acid (diluted) 50% Acetic acid (diluted) 50% Acetic acid (diluted) 50% Acetic acid (diluted)AAACCAABB
Acetic Acid 100% Acetic Acid  AAADDCACC
Acetic anhydrous acid AAABDCBCD
Benzoic acidAABAAB**A
Hydrobromic acidDDDAACADA
Hydrochloric-bromine acidDDDADCABA
Butyric acidAAADDA***
Chloric acidDDBCAD***
Chloroacetic acid (mono)DDBDDDB**
Chlorosulphonic acidBCADDDDDC
Hydrofluoric acidDDDBCCBDA
Formic acidAAACDBABC
Phosphoric acidAABAABBDA
Gallic acidAAAAAABBA
Nitric acidCCADDDCDA
Oxalic acidCCBAACABA
Perchloric acidDDAADCB*A
Picric acidAABCDDBBA
Sulphuric acidDDADDCBDA
Sulphurous acidACDAABBBA
Fatty acidsAAADABDBA
Sodium bicarbonateAAAAAAAAA
Sodium bisulphateACAAAA***
Calcium bisulphiteAADAAADAA
Sodium bisulphiteAADAAAAAA
Potassium bromideAABAAA***
Sodium bromideBBBAAA***
Ammonium carbonateAABAAAAD*
Potassium carbonateAABAAA***
Potassium cyanideAABAAAAAA
Sodium cyanideAAAAAAAAA
Ammonium chlorateBBBAAAAA*
Potassium chlorateAABAAA***
Aluminium chlorideDDBAAAAAA
Amylene chlorideAABDDD***
Ammonium chlorideAADAAA***
Sulphur chlorideAADDDDDCA
Barium chlorideBBBAAAAAA
Calcium chlorideBBBAAAAAA
Copper chlorideBBBAABAAA
Stannous chlorideBCBAAABAA
Ether chlorideAABDDDC*A
Ethyl chlorideAAADDDAAA
Magnesium chlorideBBBAAAAAA
Methylene chlorideBBADDDDDB
Methyl chlorideAAADDDCDA
Nickel chlorideBBBAAAAAA
Potassium chlorideBBAAAAAAA
Propyl chlorideAAADDD***
Sodium chlorideAAAACA***
Sulphur dioxideABDCDCADA
Ether   AAADDD***
Fluor  AADDBD***
Sodium fluorideAADAAA***
Hydroxylamine hydrochlorideDDBBDDBBB
Ammonium hydroxideAABAAAADB
Barium hydroxideAABAAAAAA
Calcium hydroxideAACAAAAAA
Potassium hydroxideAADAAAABB
Sodium hydroxideAADAAAABB
Calcium hypochloriteBCBACBACA
Sodium hypochloriteDDBCABBBA
Copper nitrateAAAAAB***
Silver nitrateAAAAAAABA
Sodium nitrateAAAAAAAB*
Potassium nitrateAAAAAAAAA
Potassium permanganateAABBBC***
Hydrogen peroxideAABCDCCDB
Sosa  AABAAA***
Aluminium sulphateADBAAAAAA
Carbon sulphateAAADDD***
Copper sulphateAAAAABAAA
Nickel sulphateAABAAAAAA
Sodium sulphateAAAAAAAAA
Zinc sulphateAAAAAA***
Magnesium sulphateAAAAAAAAA
Potassium sulphateAAAAAAAAA
Potassium sulphiteAAAAAA***
Sodium sulphiteAADAAA***
Sodium sulphideAABAAA***
Carbon tetrachlorideAAADDDDCA

Conditions: Indoor temperature 20°C. Data should be used as a guide.

Studies on corrosion data, NACE 1969

Studies on corrosion data, metalloids NACE 1969

Corrosion Tables, Stainless Steel, Jernkontoret, 1979

Chemical resistance of plastic pipe materials, Cabot Corporation, 1979.

NOTE: Concentration levels and duration of contact have a direct effect on the resistance of stainless steel to certain chemicals. A small dosage of corrosive chemicals with an adequate volume of water will improve the corrosion resistance of the stainless steel. Each application should be carefully reviewed to determine the suitability of the stainless steel for the conditions.

The products offered by CAINOX meet all standardisation requirements and norms.