STEEL INDUSTRY

Is it possible to save water by choosing the correct material for a nozzle?

Extending the operating life of a nozzle guarantees savings in economic and environmental terms.

Is it possible to save water by choosing the correct material for a nozzle?

Extending the operating life of a nozzle guarantees savings in economic and environmental terms.

Using nozzles which are suitable for the activity being carried out and therefore with optimal performances is certainly a guarantee of high quality but also of energy and water saving. That’s right: using a nozzle with poor performances will have very high costs in economic but also in environmental terms.

Selecting the right material for a nozzle is very important, since the operating life of a nozzle depends as well on its construction material.

What are the factors that affect a nozzle’s life span?

A nozzle can gradually deteriorate due to abrasion and, as this occurs over time, the orifice or the internal passage widens. This leads to a greater flow and to a greater consumption of water, causing losses in economic terms for the company but also in environmental terms for the planet.

What materials are available for nozzles, washing heads and atomizers?

The choice of a material directly depends on the operating conditions, i.e. on the pressure, on the temperature, on the type of fluid used and finally on the type of connection required. What follows is a list of the main materials at your disposal for nozzles, washing heads and atomizers. Our sales department will be able to direct and help you in choosing the most suitable material for your application.

BRASS

It is an alloy of copper and zinc, it melts at a few hundred degrees, has low hardness and excellent machinability. It is the most popular material for normal pressure applications (that of the aqueduct, which does not require the use of a pump), has no temperature limits up to about 100 ┬░ C.

BRONZE

It is an alloy of copper and tin, with high hardness and resistance to the marine atmosphere. It is used for particular naval applications and fire-fighting components.

STAINLESS STEEL

Stainless steel is an alloy of iron and carbon, with the addition of other elements such as chromium, nickel, molybdenum, vanadium, titanium. The most popular steels in our sector range from 303 to 316L.
The latter is the one used for special applications, thanks to its greater hardness and resistance to erosion but above all for its resistance to chemical attacks. The various types of steel have different degrees of weldability, from 303 -which is poorly weldable- up to 304 and 316L which allow excellent quality.

SUPERALLOY

It’s a special type of stainless steels, in which the percentages of chromium, molybdenum, nickel and other valuable alloying elements are much higher than in stainless steels and guarantee exceptional performance in very hostile environments and with serious risks of corrosion. These include the various grades of Hastelloy, Incolloy, SAF 205 etc.

TITANIUM

It is a material that has remarkable mechanical properties and great lightness. Very resistant to chemical attack, modest hardness.

THERMOPLASTIC MATERIALS

These are polymers that have high melting points and can be processed by injection molding. The most used for making nozzles are polyvinyl chloride (PVC), polypropylene (PP), polyvinylidene fluoride (PVDF), each one with specific characteristics of temperature and resistance to chemicals. The choice of the most appropriate material is usually made based on the compatible with the materials of other parts of his plant, such as pipes and valves.

TEFLON

Teflon (polytetrafluoroethylene ÔÇô PTFE) is a plastic material that cannot be melted or processed by injection molding. ItÔÇÖs synthesized under pressure and therefore Teflon parts can be produced by machine tools: this reduces its possible applications. Teflon is a very refined material, because it cannot be attacked by any chemical agent among those commonly used in standard industrial processes.

Mechanical properties of materials

Corrosion resistance

MaterialCorrosion resistance
AISI 302Good: sensitive to corrosion between grains for slow heating and cooling in the 450-900┬░ C range temperature.
AISI 303Discrete;
AISI 304/304LGood, especially for 304L. 304 sensitive to corrosion between grains like AISI 302;
AISI 309Good. Sensitive to corrosion between grains like AISI 302;
AISI 310Good. (> 304 – 304L). Sensitive to corrosion between grains like AISI 302;
AISI 316/316LVery high, especially for 316L;
AISI 321Good;
AISI 347Good;
AISI 416Good in medium corrosive ambient (atmosphere, water gasoline, alcohol, N1-13, foods). Not in high corrosive.
BRASSGood, especially when nickel plated;
BRONZEDiscrete, especially with sea water;
HASTELLOYVery high also for high temperature. To use in the temperature range 800-1200┬░ C;
PLASTICSGood, also for erosion. Generally they are attacked with oxidizers like nitric acid, halogens, ect;
PTFEVery high, except for elementary state of alkaline metals and to compounds containing fluorine at high temp;
DUPLEX STEELVery high, also with high temperature and also for pitting;
TITANIUM ALLOYVery high in oxidizing ambient. Very low in reducing ambient and with compounds containing fluorine.