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Analisi, dimensionamento e accorgimenti per la realizzazione d’impianti di protezioni dalle scariche atmosferiche

(in lingua inglese)
L'analisi, il dimensionamento, gli accorgimenti per la realizzazione d'impianti di protezioni dalle scariche atmosferiche in ambiente petrolchimico con aree ATEX esposte al fulmine.

Dimensioning
Rolling sphere method
SP300700
SP310196/Oex
Detail of installation of air-termination system OA04
Installation examples

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mcT Petrolchimico Roma maggio 2018 L’industria Oil&Gas nell’era del 4.0: efficienza, sicurezza ed energie rinnovabili

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Estratto del testo
Roma, 15 maggio 2018 Gli atti dei convegni e pi di 8.000 contenuti su www.verticale.net Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Petrolchimico External LPS Analysis, design and specific measures for the realisation of external Lightning Protection Systems (LPS) in petrochemical environments, with ATEX areas exposed to lightning flashes. mcT Petrolchimico, 30 Novembre 2017 'Petrolchimico 4.0: tecnologie innovative per la progettazione e la conduzione degli impianti". Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Roncarati Electro-Industrial Services is a company that designs, builds and provides specific elements for the realisation of lightning protection systems. Our expertise is available to support designers, architects and installers. WHO WE ARE Made
in Bologna
Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali MINIMUM TRIGGERING ENERGY FOR FLAMMABLE GASES AND VAPOURS: 0,2 1,5 mJ - For hydrogen 0,01 mJ
- For acetylene 0,02 mJ (closing an electrical switch emits approx. 100 mJ) MINIMUM TRIGGERING ENERGY FOR FLAMMABLE POWDERS: 10 150 mJ (the static electricity carried by a person can reach 135 mJ) MINIMUM TRIGGERING ENERGY First important concept to consider when dimensioning a LPS Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system Identification of the structure Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF INDICATIVE SIZE OF ADJACENT PIPE RACK STRUCTURE Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system Identification of ATEX areas INDICATIVE SIZE OF ADJACENT PIPE RACK STRUCTURE Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali IEC EN 62305-3 Standard (II edition), att. D, section D.3.1 The LPS shall be designed and installed in such a manner that, in case of a direct
lightning flash, there are no melting or spraying effects except at the striking point. NOTE 1 ' Sparks or damaging impact at the striking point may also be experienced. This should be taken into consideration in the determination of air-termination device locations. Down-conductors should be installed in such a way that the auto-ignition temperature given by the source of the relative hazardous area is not exceeded in those applications where it is not possible to install down-conductors outside of the hazardous area. Dimensioning of the air-termination system IEC EN 62305-3 Standard (II edition), att. D, section D.5.1 All parts of the external LPS (air-termination and down-conductors) shall be at least 1 m away from a hazardous area, where possible. Where this is not possible, conductors passing within a hazardous zone should preferably be continuous or connections shall be made in accordance with section 5.5.3 of the Standard. Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system It is prioritary to identify the no-strike area (1 m outside of ATEX zones), the area in which there must be no striking points. Soluzioni Innovative di
Protezione contro i Fulmini
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Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system The striking points must exclusively be outside of the no-strike area. It is necessary to position the striking points (via the rolling sphere or protection angle methods) so that they are the only possible points of impact for the lightning flash. Striking point No-strike area Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Rolling sphere method ' No point of the protected structure is in contact with the sphere rolling on the ground, around and on the structure in all possible directions. ' The safety distance (s) is maintained. ' The striking point is at least 1 m outside of any classified areas. Leonardo Roncarati The positioning of the air-termination device is correct if: It is important to clearly identify the striking points Striking point Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system Once the striking points have been determined, it is necessary to understand how to carry the lightning current to the ground without it interacting with the surrounding environment. It is often difficult to create paths isolated from the structure due to the heights. The structure, if realised in steel or reinforced
concrete laid on site, must be used as natural down-conductor and dispersion element. Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Dimensioning of the air-termination system It is then a case of bringing the lightning current from the striking point to the structure, bearing in mind that the path and the connection will be inside an ATEX area. Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Where structures are particularly tall and/or the LPS is particularly severe (level I or II), it may be appropriate to consider installing horizontal or inclined air-termination elements. Leonardo Roncarati Dimensioning of the air-termination system This solution allows to optimise the number of the protection elements. Striking point Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati May 15, 2018 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Extracted from IEC EN 62305 Dimensioning of the air-termination system It is extremely important to choose
the right materials, both because of
corrosion effects, and for the
possible presence of H 2S ' ' and also for the overtemperature generated
in them due to the transit of the lightning current. Extracted from IEC EN 60079 Table D.3 - Evaluation of overtemperatures of conductors with different sections as a function of W/R Section Aluminium Mild steel Copper Stainless steel (a) Austenitic, not magnetic Temperature class Max surface temperature Table 2 ' Classification of max surface temperatures for class II electrical appliances Roncarati Servizi elettro industrial Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
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SIPF Roncarati Servizi elettro industriali 70 mm2 Aldrey rope. The Aldrey term indicates an aluminium alloy (E-
AlMgSi) consisting of 99% aluminium, 0,5% silicon and 0,5% magnesium,
ideal for UNI 3570 electrical systems.
Technical specifications Breaking load 1985 kg Theoretical mass 0,1878 kg/m Elasticity module 5700 kg/mm2 Electrical resistance at 20C 0,484 '/km Thermal expansion coefficient 23x10-6 1/C IEC EN 62561 ' IEC EN 62305 compliant SP300700 Air-termination rope Leonardo Roncarati When crossed by the maximum standard current, it undergoes a
temperature increase of only 19C. This condition makes it ideal
for systems in environments containing explosive atmospheres.
19 arranged 2,14 mm-diameter
conductors
Soluzioni Innovative di
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Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Roncarati Srl Soluzioni Innovative di
Protezione contro i Fulmini
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Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Parete in cemento Steel beam CEI EN 62561 ' CEI EN 62305 SP310196/Oex Universal anchoring M12 conductor in galvanized steel Double weld bead Frontal view Section view SP300750 connector predisposition Roncarati Srl Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
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SIPF Roncarati Servizi elettro industriali Reinforced concrete wall Conforme CEI EN 62561 ' CEI EN 62305 waterproof sheath Sectional view SP300750 connector predisposition Roncarati Srl SP555612 Connection to reinforcement rods with terminal SP555612 Sealing element composed of 1 OR rubber, 1 shaped disc 70 mm and 1 nut M12 both in AISI304 M12 conductor in galvanized steel SP310196/Cex Universal anchoring Leonardo Roncarati Leonardo Roncarati m a x 3 ,0 m SP310196/S SP320100 SP320366/S1 x 2 0 ,7 m ATEX ZONE No-strike area (1,0 m) Connection to air-termination system must be crimped so that it cannot be
opened again, and also to prevent accidental loosening. The conductors
passing through the ATEX areas must be
continuous, without connections, even if
they are covered by the masts. Outside ATEX areas not protruding more than 3 m from the
structure. Equipments/systems located only within the structure profile. Striking points must be outside the no-strike
area. The structure is a natural down-conductor. Personnel is
protected only inside the structure profile. Detail of installation of air-termination system OA04 Petrochemical environment, steel framework Cone-shaped protection zone Connection to structure by means of crimped sleeve connector Striking point In case of fire-resistant structures (protected by fire-proof material), the installation shall be performed so as to maintain the fire-resistance rating of the structures. Dimensional and inclination characteristics as per graphical plans Reinforced rod with joint SP300150250 + SP320150/050 High mechanical endurance fiberglass mast with integrated down-conductor, type SP320559 Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Leonardo Roncarati Installation examples Striking point Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Petrochemical plant with exposed ATEX areas; air-termination rods on PPI
masts with integrated down-conductors; steel framework structure used as natural down-conductor element. Leonardo Roncarati SP355666 Leonardo Roncarati SP330520 SP300750 SP555612 SP300700 SP320366/S1 SP320100 Detail of installation of air-termination system CA03 Petrochemical environment, reinforced concrete structure Equipment, systems and ATEX areas are also on the rooftop. Striking points must be outside the no-strike area. The structure is a natural down-conductor. Connection to air-termination system must be crimped so that it cannot be opened again, and also to prevent accidental loosening. The conductors passing through the ATEX areas must be continuous, without connections, even if they are covered by the masts. Personnel is protected only inside the structure. No-strike area (1,0 m) Cone-shaped protection zone Reinforced rod with joint Striking point Connection to natural down-conductor by means of crimped sleeve connector Fiberglass mast with integrated down-conductor ATEX zone Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Leonardo Roncarati Installation examples Petrochemical plant with exposed ATEX areas; air-termination rods on PPI masts with integrated down-conductor; vibrated reinforced concrete structure used as natural down-conductor element Striking point Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati Leonardo Roncarati SP300750 SP555612 SP300700 SP310196 SP320340 SP320609 SP320346 SP355556 x 3 SP320100 Striking point Detail of installation of air-termination system CA04 petrochemical environment, reinforced concrete structure Equipment, systems and ATEX areas are also on the rooftop. Striking points must be
outside the no-strike area. The structure is a natural down-conductor. Connection to air-
termination system must be crimped so that it cannot be opened again, and also to
prevent accidental loosening. Cone-shaped protection zone Striking point Triangular wall bracket SP320381 Reinforced rod with joint The conductors passing through the
ATEX areas must be continuous, without connections, even if they are
covered by the masts. Personnel is
protected only inside the structure. ATEX zone High mechanical endurance fiberglass mast with integrated down-conductor No-strike area (1,0 m) Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Leonardo Roncarati Petrochemical plant with exposed ATEX areas, air-termination rods on PPI masts (and double rods on reinforced PPI masts) with integrated down-conductor. Vibrated reinforced concrete structure used as natural down-conductor element Striking point Installation examples Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Roncarati Srl m a x 6 ,0 m SP310196/S SP320100 SP320340 SP320346 SP355556 x 3 SP320609 x 3 Non-interception area (1,0 m) Connection to structure by means of crimp sleeve connector Striking point Detail on installation of air termination system OA07
Petrolchemical environment, steel framework Additional anchoring element (optional) Personnel is protected only inside the structure shape. Connection to air termination system must be a crimped one
that cannot be opened again, or such so as
to prevent accidental loosening The conductors passing through the Atex areas
must be continuous, without connections,
even if they are inside the poles.
It is necessary to keep the separation
distance between equipments/systems and
the air termination system. Equipments/systems protrude outside the structure, Atex areas
extend also outside the structure (3 to 6 m). The structure is a
natural down-conductor. Striking points must be outside the non-
interception area. Atex zone High mechanical endurance PRFV pole with down-conductor integrated type SP320559 in case of structure fire protected by fire proofing material, the installation shall be performed keeping the fire proofing rating of the structures dimensional and inclination
characteristics as drawings
Joint reinforced rod SP300150250 + SP320150/050 Drilling beam as disc SP320340 (3x17+1x26 mm) Roncarati Srl Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Leonardo Roncarati Petrochemical plant with exposed ATEX areas; air-termination rods on PPIr masts with integrated down-conductors; steel framework structure used as natural down-conductor element. Striking point Installation examples Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati Leonardo Roncarati No-strike area (1,0 m) Natural down-conductor connection, specific for ATEX areas Striking point Detail of installation of air-termination system OA08
Petrochemical environment, steel framework The structure is a natural down-conductor. Personnel
outside of the structure is protected only on the
stepping ground.
Connection to air-termination system must be crimped so that it cannot be opened again, and also
to prevent accidental loosening. The conductors
passing through the ATEX areas must be continuous,
without connections, even if they are covered by the
masts.
It is necessary to maintain the safety distance
between equipments/systems and the air-termination
system. Equipments/systems protrude from the structure. ATEX
areas also protrude (4,5 to 8,5 m). Striking points must be
outside the no-strike area. ATEX zone Fiberglass/steel mast with integrated down-conductor type SP300501I--- Leonardo Roncarati In case of fire-resistant structures (protected by fire-proof material), the installation shall be performed so as to maintain the fire-resistance rating of the structures. m a x 8 ,5 m Dimensional and inclination characteristics as per graphical plans SP310196/S 1 ,5 m Reinforced rod with joint SP300150250 + SP320150/050 SP320100 SP330656 x 3 Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industriali Leonardo Roncarati Petrochemical plant with exposed ATEX areas; air-termination rods on PCI
masts with integrated down-conductors; steel framework structure used as natural down-conductor element. Striking point Installation examples Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
SIPF Roncarati Servizi elettro industrial Leonardo Roncarati 30 novembre 2017 Soluzioni Innovative di
Protezione contro i Fulmini
Soluzioni Innovative d
Protezione contro i Fulmin
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