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Powder & Bulk Solids, May 2014

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Powder & Bulk Solids 16 TechnicalExclusive M a y 2 0 1 4 • Made from materials with Surface Resistivity on at least one surface between 1.0x10 9 and 1.0x10 12 ohm per square. • If the material is multi-lay- ered, or if the material has outer surface with Surface Resistivity >1.0x10 12 ohm per square Breakdown Voltage through the material shall be < 4KV • If the material is multi-lay- ered or it has inner surface with Surface Resistivity >1.0x10 12 ohm per square, Breakdown Voltage through the material shall be < 4KV and thickness shall be <700 micrometer Type L3 Liner A type L3 Liner should meet the following criterion: • Made from materials with Surface Resistivity greater than 1.0x10 12 ohm per square • Breakdown Voltage through the material shall be less than 4KV Selection Criterion for FIBC and Liner Combination Once the type of a particular liner and the FIBC has been determined (using the tests dis- cussed above), the table on the previous page can be utilized to determine the permissible com- bination of a liner with a spe- cific type of FIBC. There are additional require- ments for labeling and testing a particular type of FIBC. It is ad- vised that a thorough risk assess- ment should always be conducted before using FIBC in potentially hazardous situations. Selecting and using a suitable type of FIBC and liner combination is one of the important steps to prevent the risk of fire and explosion hazards. Muhammad Qureshi, Ph.D., is a process safety specialist at Chilworth Global. He provides con- sulting services in dust explosion and electrostatic hazard assessment and is also responsible for standard and customized electrostatic testing. He is a member of the American Society of Mechanical Engineering. He received his Ph.D. in mechani- cal engineering from the New Jersey Institute of Technology (NJIT) in 2006. Chilworth can help you un- derstand the electrostatic hazards associated with the use of FIBCs by determining the electrostatic characteristics of FIBC, liners, and powder materials by conducting the above mentioned tests in its state- of-the-art ISO-accredited laboratory. Chilworth's senior process safety specialists can help interpret results and provide specific guidance in regards to the safe use of FIBCs, es- pecially with liners. For more infor- mation, visit www.chilworth.com. References [1] NFPA 654: Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids 2013. [2] IEC 61340 Edition 2.0 2012- 01: Electrostatics – Part 4-4: Standard test methods for specific applications – Electrostatic clas- sification of flexible intermediate bulk containers (FIBC). [3] Safety Watch: "FIBC Selection and Safe Use" A focus article by Muhammad M. Rafique Qureshi, published online by Chilworth Technology Inc., Jan 2013. %&RPSRQHQWV/WG 0RUWRQ,/86$ ZZZJREFRPXVD Nothing Slips Past Watchdog ™ Elite Place Your Elevators and Conveyors Under 24-Hour Guard! %HDULQJ7HPSHUDWXUH %HOW8QGHUVSHHG %HOW$OLJQPHQW +HDG3XOOH\$OLJQPHQW 3OXJ&RQGLWLRQ ADB Bearing Temperature Sensor Adjustable Depth Bearing Protection! s 3CREW IN 0OSITIVE -OUNT )NSTALLATION s 'REASE :ERK FOR "EARING ,UBRICATION s v .04 #ONDUIT %NTRY 3TEEL "ODY s .4# OR 0424$4YPES s#3!#LASS))$IVISION!PPROVED P800 Inductive Underspeed Switch Simple, Versatile and Reliable Protection! s-ONITORSSHAFTSPEED ONROTATINGEQUIPMENT s!LSODETECTSPOSITIONOFDOORSSLIDESGATES s.ONCONTACTINGDETECTSTARGETSUPTOMM AWAY s#3!#LASS))$IVISION!PPROVED TouchSwitch ™ A Safer and More Efficient Belt Alignment Monitoring Device! s3ENSORISTRIGGEREDBYTHE FORCEOFBELTCONTACT s2EQUIRESNOHEATBUILDUP SOITSSAFERANDMOREEFlCIENT s(ARDENEDSTAINLESSSTEELFACE s%XTERNALTESTKNOB s#3!#LASS))$IVISION!PPROVED U.S. Pat. 6,731,219 Auto-Set ™ Flush Probe Plugswitch Set-It and Forget It! s$ETECTSLEVELORPLUG CONDITIONSINBULKGRANULARSOLIDS ORLIQUIDS s/NCECALIBRATEDITNEVERHASTOBERE CALIBRATED s!UTOMATICALLYCOMPENSATESFORDUSTBUILDUP s#3!#LASS))$IVISION!PPROVED 3URWHFWLRQ ,QWHUQDWLRQDO3RZGHU %XON6ROLGV([KLELWRU%RRWK ES425354_PB1405_016.pgs 04.18.2014 03:35 UBM black yellow magenta cyan

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