ARCHIVE
june 2020
may 2020
april 2020
march 2020
february 2020
january 2020
december 2019
november 2019
october 2019
august 2019
july 2019
june 2019
may 2019
april 2019
march 2019
february 2019
january 2019
december 2018
november 2018
october 2018
september 2018
august 2018
july 2018
april 2018
march 2018
february 2018
january 2018
december 2017
november 2017
october 2017
september 2017
august 2017
july 2017
june 2017
may 2017
april 2017
march 2017
february 2017
january 2017
december 2016
november 2016
october 2016
september 2016
august 2016
july 2016
june 2016
may 2016
april 2016
march 2016
february 2016
january 2016
december 2015
november 2015
october 2015
september 2015
august 2015
july 2015
june 2015
may 2015
april 2015
march 2015
february 2015
january 2015
december 2014
november 2014
october 2014
september 2014
august 2014
july 2014
june 2014
may 2014
april 2014
march 2014
february 2014
january 2014
december 2013
november 2013
october 2013
september 2013
august 2013
july 2013
june 2013
may 2013
april 2013
march 2013
february 2013
january 2013
april 2011

Hose for LPG realized according to the EN ISO 3821 standard

Characteristics of the hose for LPG laid down by the ISO 3821 standard relating to welding equipment

Within the Gnali Bocia catalog there is a wide range of LPG hoses that directly refer to the EN ISO 3821 standard. This standard, which replaced the previous EN 599, specifies the construction requirements for rubber hoses intended for welding, cutting and other related activities. In particular, the conducted fluids must have a pressure lower than 2 MPa and an operating temperature between -20 and 60 ° C.
Compliance with the legislation guarantees safety in the use of LPG hoses and it is important to remember that the rubber hoses for these applications must always be checked by an external body: this requirement is fundamental for the marketing of the components.

The legislation prescribes some important rules in terms of:
- Hose coloring: essential for visual identification and correct coupling;
- Marking: provides the main information regarding the component and must be replaced at least once every 1000 mm of pipe.


The coloring


As mentioned, the EN ISO 3821 standard accurately exposes the details related to the paste coloring of rubber hoses. In particular, the distinction is made, on the basis of the fluid conveyed, between:
- Red: used for acetylene and other combustible gases;
- Blue: used for oxygen and for mixtures containing oxygen;
- Black: used for air, inert gases (argon), nitrogen and carbon dioxide;
- Orange: used for LPG or natural gas.

Therefore, the rubber hoses for LPG must be made in orange color.



The marking


Another fundamental aspect, as mentioned above, is the marking of the tube. It consists of five fields necessary for identification:
1. The number of the reference legislation;
2. The maximum operating pressure in MPa and, in parentheses, in bar;
3. The measure of the nominal diameter of the hose;
4. Name and brand of the manufacturer and distributor;
5. The year the hose was made.

An example of marking can be: ISO 3821-MPa (20 bar) - 6 - Gnali Bocia - 20.


During the time, how long can an LPG hose last?

It is important to note that the legislation does not prescribe a maximum life of the LPG hose as it cannot be estimated in advance without considering the operating conditions and the environment in which it operates.
This, in any case, does not mean that there are no common sense rules to follow for the safety and efficiency of these components. Among these, it is worth mentioning:

- Annual visual inspection to check the integrity of the hose;
- Testing and revision carried out either by the manufacturer or by highly specialized personnel for this type of product;
- Use of original spare parts for damaged parts;
- Replacement in case of damage or if 3 years have passed for demanding applications, and after 5 years for applications in more controlled environments.


26/02/2020


See also
26/02/2017 Rubber or PVC lpg hose Lpg hose with fabric core to improve resistance against the pressure of the gas in the system

26/11/2018 LPG pipe in PVC or rubber, depending on the application LPG pipe in the rubber version that can also be used for industrial welding equipment

26/05/2019 Flexible water hoses: everything you need to know

26/02/2013 Stainless steel hoses for domestic use From residential use to heating and boiler systems: stainless steel hoses are an effective solution for many structures.

26/05/2015 FL289 the series of hoses for water The hoses for water in stainless steel in order to ensure maximum hygiene for the installations.


I contenuti di questo sito non hanno carattere di periodicità e non rappresentano 'prodotto editoriale'.