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Metal pickling to remove surface impurities 22/07/2016
Metal pickling to remove surface impurities
Removing oxides and surface impurities is called metal pickling, a process that is usually carried out using acids or alkalis diluted in water. The part to be cleaned is immersed in this solution until the activity of the acid reaches the required effect. Any material can be pickled, but metal [...]

Important impact test to understand resistance to crashes of material 15/07/2016
Important impact test to understand resistance to crashes of material
In one of the previous articles, we talked about the minimum prerequisites that the material used for connectors must possess in order to fulfil the requirements laid down by the PED directive, which regulates pressure vessels. One of these prerequisites is the minimum value to be detected [...]

PED Directive and some food for thought 08/07/2016
PED Directive and some food for thought
With a view to harmonizing the various national legislations, the European community has issued a series of directives that make it possible, especially in the field of critical applications such as machinery or pressure vessels, to have criteria capable of ensuring that the products reaching [...]

How to interpret pressure nominal? 01/07/2016
How to interpret pressure nominal?
In the field of piping, a fundamental parameter providing information on the sizes of components is the pressure nominal (PN), a number that might be combined with diameter nominal (DN) in order to define the sizes of such elements as flanges. The pressure nominal (PN) is a number within a [...]

Comparison between the S235 steel and the more powerful P235GH. 24/06/2016
Comparison between the S235 steel and the more powerful P235GH.
The new European EN 10025 standard defines the category of structural steels, such as the S235 steel, generic alloys used for manufacturing carpentry and defined by their yield strength. It does not have special chemical characteristics, and its composition must be kept within well-defined [...]

Fittings with NPT (National Pipe Tapered) thread according to the ANSI B 1.20.1 standards 17/06/2016
Fittings with NPT (National Pipe Tapered) thread according to the ANSI B 1.20.1 standards
The NPT (National Pipe Thread) thread, also known as American thread, is one of the standards used for threaded-type junctions and complies with the ANSI B 1.20.1 standard, which lays downs its sizes and characteristics. Mainly used in the field of fittings and stainless or carbon steel valves, [...]

Carbon steel fittings in WPB o in P235GH 10/06/2016
Carbon steel fittings in WPB o in P235GH
In the INTERTUBI catalogue, we find two sections devoted to fittings. Therein, we come across carbon steel fittings manufactured with special alloys, suited to difficult working conditions. Precisely within this context, we have in the warehouse available products manufactured with [...]

The high resistance to corrosion of the WP316 03/06/2016
The high resistance to corrosion of the WP316
WP316 is an austenitic stainless steel that, together with other materials from the same category, allows a wide choice of applications; in our case we have a good resistance to high temperatures typical of many sectors. WP316 may be used in the chemical and petrochemical industries, in the [...]

Choice of the spring check valve and the right seal 27/05/2016
Choice of the spring check valve and the right seal
In the dedicated section of the catalogue, we may find such a versatile and reliable product as the spring check valve (aurora model), a device to apply to plants through a threaded connection. The sizes are suitable to small diameter pipes and may reach up to a maximum value of [...]

Characteristics of the cast (austenitic) stainless steel CF8M 20/05/2016
Characteristics of the cast (austenitic) stainless steel CF8M
In the production of valves through the micro-fusion process, a method mainly used for the realization of bodies of valves, the material used in most instances is the cast stainless steel CF8M, an alloy that is part of the austenitic stainless family and is the equivalent of the more famous AISI [...]


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