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Mechanical tests on fittings for a better service to the client 26/08/2016
Mechanical tests on fittings for a better service to the client
The execution of mechanical tests on fittings is one of the fundamental steps, since the company may issue, at the client’s behest, the type 3.1 certification as contemplated by the European standard EN 10204. This makes it possible to fully trace the production chain and ensure the [...]

OHSAS 18001 certification: a social responsibility as well 19/08/2016
OHSAS 18001 certification: a social responsibility as well
The company, always committed to quality towards the external customers, acts likewise towards its internal clients, i.e. its employees. That is done by attaining the OHSAS 18001 certification pursuant to the implementation of a management system regulating all issues of workplace health and [...]

Flat flanges and the relationship between tightening and surface finish 12/08/2016
Flat flanges and the relationship between tightening and surface finish
Let us resume speech on a topic we tackled some time back, which we may come across in flat flanges as well, namely,  the finishing of the surfaces of the flange itself that serve as support for the sealing gaskets. The surface is never entirely smooth, a fact that enables the seal to remain in [...]

Lower pressure drops with the 45º F-F elbow. 05/08/2016
Lower pressure drops with the 45º F-F elbow.
Threaded connections may be done with a wide variety of connectors, among them: elbows, 45º F-F elbow, tees, sleeves, nipples, realized in order to ensure sealed connections on the thread that are capable of challenging almost any type of fluid, in especially harsh environments. We said [...]

NACE MR 0175 is the standard that helps choose steel 29/07/2016
NACE MR 0175 is the standard that helps choose steel
The NACE MR 0175 standard, also catalogued as ISO 15156, defines the materials that can be used in the oil & gas field, in environments where there is a high concentration of hydrogen sulfide, H2S, that is typical of this kind of production. It considers carbon steel or low-alloy steel, with a [...]

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 [...]


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