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NPT thread, a standard born in the mid-800s 23/09/2016
NPT thread, a standard born in the mid-800s
In the section of the catalogue dedicated to fittings made according to the ANSI B16.11 standard, we find articles for threaded connections making use of the by now consolidated conical NPT thread for the hermetic coupling on the threads. Why do we refer to it as consolidated? Because the [...]

S235, a widespread structural steel 16/09/2016
S235, a widespread structural steel
In mechanical constructions, as well as in the sector of steel fittings, a clearly significant role is played by construction steel, a group of materials mainly defined on the basis of their resistance rather than on the basis of their composition. Among them we find S235, a material that has [...]

H2O 2016: let us meet at the Bologna fair 09/09/2016
H2O 2016: let us meet at the Bologna fair
INTERTUBI, faithful to its client’s orientation, will take part this year, in Bologna, in the H2O 2016 fair, an event that gathers at such an important location as Bolognafiere the best manufacturers associated with water and gas conduction and distribution systems. In a sector such as [...]

Needle valve as a system adjustment tool 02/09/2016
Needle valve as a system adjustment tool
The life of components, especially components of lab systems and systems of process lines, is heavily tested, in terms of pressures, temperatures, and fluid conduits mot always kind to the metal. In order to ensure a long duration, it is necessary to use such components as the needle valve [...]

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 [...]


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