Transcript
SUPPRESSION CONTAINER HRD Specifications and Installation Instructions 1. Explosion suppression concept
4. F eatures Features
Generally an explosion suppression system can be compared to a fire fighting system (refer figure 1).
Important features of the Fike explosion suppression equipment include: A wide selection of High Rate Discharge suppression containers is available, offering protection on small to very large volumes. A specially engineered release system offers extremely fast response times and reduces dramatically the system maintenance costs.
Upon detection c of the combustion a control unit d will initiate the container e which will discharge the suppressant agent within milliseconds to enclose and suppress the growing fireball f. The reduced pressure achieved by the suppression system – typically only 0.3 barg – is very short in duration, allowing low strength equipment to be protected.
1 3 4
2
Figure 1: explosion suppression system
Proven system performance: The Fike explosion suppression system offers extremely fast response times combined with proven suppression capabilities and system reliability. These features are demonstrated by extensive testing programs, including third party testing at Ciba Geigy in Switzerland, DMT, Dortmund and FSA, Kappelrodeck in Germany. The Fike explosion suppression systems and its components have been designed for low maintenance and ease of servicing. A wide variety of system components and extinguishing agents are available to offer a solution for most explosion protection applications (dust, combustible vapours/gases and hybrid mixtures).
2. Safety functions The safety function of the explosion suppression system is to detect timely the explosion and to suppress the combustion reaction, thus limiting the explosion pressure and flames to an acceptable and safe level.
3. Application Explosion suppression is the preferred method when toxic materials are being handled, if equipment is installed indoors or venting exposes personnel to unacceptable risks due to pressure, heat, and/or flames.
5. Specifications Executions Explosion hazard Initiator Maximum operating tem perature Ambient temperature Fill pressure (N 2 ) driving container Enclosure protection indices Hazardous area classification Painting specifications Tested at Material specification
Photo 1: suppression container on dryer See § 7 Physical characteristics Combustible dusts (incl. St 3), gases and hybrid mixtures Pyrotechnic initiator (detonator) or gas cartridge actuator (GC A) 120 °C (standard spreader) 200 °C (telescopic spreader) - 40 °C to + 55 °C 62 barg at ambient tem perature 22 °C IP66 Atex D/G 2/1 for installation into areas 21/1 Primer: high build 2-component zinc phosphate primer Finish: white high build 2-component coating FSA, Mannheim / D MT, Dortmund / Ciba G eigy, Basel / Fike / Ineris, France Carbon steel main body and flange, chemically nickeled Initiator housing: Stainless steel Pressure gauge: Stainless steel Junction box: Aluminium
6. Standard Dimensions / Installation Instr uctions Fike Explosion Suppression Instructions Container OK
OK OK
NOK all types
NOK NOK
OK
NOK all types
2,5; 5; 10 L
Container (litre) 4” HRD 2.5 5 10 20 30 6” HRD 50 (1) (2) (3)
(4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
C
D
Weight empty (kg)
Max. dimension (mm) A
B
Reaction-force (N)
500 610 870 950 1160
310 400 400 470 470
∅114 ∅168 ∅168 ∅273 ∅273
430 470 470 470 470
30 42 46 75 85
8900 13345 22241 40034 44482
1310
620
∅273
628
150
67000
HRD’s are placed on protected volumes in such a manner as to provide the most complete distribution of agent possible. Suppressant discharge must not be restriced by internal partitions, diverters etc.. Restricted discharge may require additional HRD’s. An additional backing plate outside or inside is required if the vessel wall thickness is less than 6 mm. All welds, mounting surfaces and fittings to whitstand generated forces during activation. Recommended min. backing plate dimensions: 4”:OD 360 mm; 6”: OD 410 mm; thickness: 6,5 mm. Proces flanges and spreader nozzle covers; refer to datasheet 8.6503. Installer to insert studs into process flange using lock-tite lubricate threads (friction coefficient 0,12) and torque to 81 Nm max.. The container requires sufficient support, based on the container weight (see table) – by installer. Refer to drawing for ideal bracket area. Cable shield insulated and connections within electrical box by Fike during start-up. DO NOT CONNECT ACTUATOR!!!! Each container shall be factory filled with suppressant powder. Container will be pressurised (N2@ 62barg, 22°C) on site. Refer to datasheet 8.6605 (nitrogen filling requirements). Installer to connect earthing. Reserve free area for access and maintenance (1000 mm). Installer to provide permanent lifting lugs. Min. 500 mm above containers’ upper lifting lug. Name plate. Gate and valve assembly – protective cap.
7. Component parts of an explosion suppression container HRD suppression container Spreader nozzle Spreader nozzle cover
Process flange Initiator in safety housing Extinguishing agent
4”: 2.5 L, 5 L, 10 L, 20 L, 30 L; 6”: 50 L Standard spreader nozzle, AISI 304 Telescopic spreader nozzle, AISI 304 Standard nozzle cover, Neoprene Blow off nozzle cover, Neoprene (not for 6” HRD container) Telescopic nozzle cover, Silicone (not for 6” HRD container) Telescopic nozzle cover, AISI 316 Carbon steel or SST AISI 316 Detonator Gas cartridge actuator GCA Sodium Bicarbonate (SBC) Dessikarb (Food Grade Quality Sodium Bicarbonate) M ono Ammonium Phosphate (M AP)
All above data are subject to change without notice. They must not be used unless confirmed in writing.
8.6501.00.1
Fike Europe B.v.b.a. ∙ Toekomstlaan 52 ∙ B2200 Herentals ∙ Belgium Tel. +32 14 210031 ∙ Fax +32 14 210743 ∙ email
[email protected] ∙ website: http://www.fike.be Fike United Kingdom ∙ Maidstone ∙ England Tel. (01622)677081 ∙ Fax (01622)685737 ∙ e-mail
[email protected] ∙ website http://www.fike.co.uk
