Saturday, January 19, 2008
Wednesday, January 16, 2008
Monday, January 14, 2008
Tuesday, January 8, 2008
Explosions, Fires and Accidents Resulting from Leakage of Liquefied Petroleum Gas
10.1 (LPG)
10.1.1 In view of the considerable use on smaller cargo ships, fishing vessels, tugs, barges, launches and pleasure craft of bottled hydrocarbon gases for cooking, water and space heating, refrigerators, etc., the MCA wishes to draw attention to the possible dangers which may accompany their use and to the need for installations to comply at least with the requirements of British Standard Institution publication BS 5482: Part 3: 1979—The code of practice for domestic butane and propane gas-burning installations; Part 3—Installations in boats, yachts and other vessels.
Individual appliances and fittings should comply with the relevant British Standard Specifications listed in BS 5482: Part 3: 1979.
more
10.1.1 In view of the considerable use on smaller cargo ships, fishing vessels, tugs, barges, launches and pleasure craft of bottled hydrocarbon gases for cooking, water and space heating, refrigerators, etc., the MCA wishes to draw attention to the possible dangers which may accompany their use and to the need for installations to comply at least with the requirements of British Standard Institution publication BS 5482: Part 3: 1979—The code of practice for domestic butane and propane gas-burning installations; Part 3—Installations in boats, yachts and other vessels.
Individual appliances and fittings should comply with the relevant British Standard Specifications listed in BS 5482: Part 3: 1979.
more
Wednesday, January 2, 2008
FCG POWER PRODUCTS
Products
Product List Light Fittings Control Station Junction Box Switches Control Panel Telephone Cable Gland Accessories
Light Fittings
Control Station
Junction Box
Switches
Socket
Control Panel
Telephone
Cable Gland
Accessories
more
Product List Light Fittings Control Station Junction Box Switches Control Panel Telephone Cable Gland Accessories
Light Fittings
Control Station
Junction Box
Switches
Socket
Control Panel
Telephone
Cable Gland
Accessories
more
Tuesday, January 1, 2008
other expert reports
OCRed document
every flameproof cable gland needs to be. inspected (after installation) by a registered. expert. This registered expert is normally ...ieeexplore.ieee.org/iel3/1240/489/00009533.pdf?arnumber=9533 - Similar pages
[PDF]
Newsletter
File Format: PDF/Adobe Acrobat - View as HTML‘Flameproof Enclosures’,. Certification. •. Secretary CENELEC/TC31. “Electrical Apparatus for explosive. atmospheres”. •. expert IEC/MT 7 ‘Flameproof ...www.iecex.com/newsletter/021204_IECEx_%20Newsletter_02_02-rev-21.pdf - Similar pages
Mining Science and Technology '99: Proceedings of the '99 ... - Google Books Result
by Heping Xie, Tad S. Golosinski - 1999 - Technology As shown in Figure 6, the flameproof portable computer with an expert system communicates with each monitoring system substation in underground longwall ...books.google.com/books?isbn=9058090671...
JUNCTION BOXES
Expert in CNC Dies, Jigs, Fixtures, Precision Components, ... Flame Proof Light Fitting, Flame Proof Equipments, Flame Proof Switchgears, Flame Proof ...www.maharashtradirectory.com/SearchResult.asp?ProductID=1756 - 139k - Cached - Similar pages
Flameproof - a reference guide from Processingtalk
Looking for the latest flameproof-related news? ... As part of its commitment to the provision of expert technical advice on electrical conduit systems, ...www.processingtalk.com/guides/flameproof.html - 20k - Cached - Similar pages
Environmental-Expert.com - 0500 series mid-flow process and ...
Environmental Expert Gold & Silver Sponsorships Now Available! ... RS232 analogue auto control pumps; 521DF/RLA close-coupled flameproof fixed speed pumps ...www.environmental-expert.com/STSE_resulteach_product.aspx?cid=2193&idprofile=37&idproduct=1072 - 74k - Cached - Similar pages
Fire Doors Exporter
We take this opportunity to introduce ourselves as leading expert in the filed ... flame proof equipments, safety equipments, fire protection equipments . ...www.tradeindia.com/selloffer/1270181/Fire-Doors.html - 49k - Cached - Similar pages
[PDF]
COMPOSITION OF ET 01 BASIC ELECTROTECHNICAL STANDARDS Central ...
File Format: PDF/Adobe Acrobat - View as HTMLIndian Pump Manufacturers' Association. Shri C.S. Kasana,. Alternate ..... Indian Flameproof Mfrs. Association. Shri Nandakumar K. Principal ...www.bis.org.in/sf/competd.pdf - Similar pages -
UMARGAM INDUSTRIES ASSOCIATION
World chemical directory with chemical manufacturers, ... Products:, Electric Hoist,EOT Cranes,Good Lifts,Speciality Flame Proof Hoist. ...www.uiassociation.org/cgi-bin/via/search.cgi?query=Engineering&nh=8 - 136k - Cached - Similar pages -
every flameproof cable gland needs to be. inspected (after installation) by a registered. expert. This registered expert is normally ...ieeexplore.ieee.org/iel3/1240/489/00009533.pdf?arnumber=9533 - Similar pages
[PDF]
Newsletter
File Format: PDF/Adobe Acrobat - View as HTML‘Flameproof Enclosures’,. Certification. •. Secretary CENELEC/TC31. “Electrical Apparatus for explosive. atmospheres”. •. expert IEC/MT 7 ‘Flameproof ...www.iecex.com/newsletter/021204_IECEx_%20Newsletter_02_02-rev-21.pdf - Similar pages
Mining Science and Technology '99: Proceedings of the '99 ... - Google Books Result
by Heping Xie, Tad S. Golosinski - 1999 - Technology As shown in Figure 6, the flameproof portable computer with an expert system communicates with each monitoring system substation in underground longwall ...books.google.com/books?isbn=9058090671...
JUNCTION BOXES
Expert in CNC Dies, Jigs, Fixtures, Precision Components, ... Flame Proof Light Fitting, Flame Proof Equipments, Flame Proof Switchgears, Flame Proof ...www.maharashtradirectory.com/SearchResult.asp?ProductID=1756 - 139k - Cached - Similar pages
Flameproof - a reference guide from Processingtalk
Looking for the latest flameproof-related news? ... As part of its commitment to the provision of expert technical advice on electrical conduit systems, ...www.processingtalk.com/guides/flameproof.html - 20k - Cached - Similar pages
Environmental-Expert.com - 0500 series mid-flow process and ...
Environmental Expert Gold & Silver Sponsorships Now Available! ... RS232 analogue auto control pumps; 521DF/RLA close-coupled flameproof fixed speed pumps ...www.environmental-expert.com/STSE_resulteach_product.aspx?cid=2193&idprofile=37&idproduct=1072 - 74k - Cached - Similar pages
Fire Doors Exporter
We take this opportunity to introduce ourselves as leading expert in the filed ... flame proof equipments, safety equipments, fire protection equipments . ...www.tradeindia.com/selloffer/1270181/Fire-Doors.html - 49k - Cached - Similar pages
[PDF]
COMPOSITION OF ET 01 BASIC ELECTROTECHNICAL STANDARDS Central ...
File Format: PDF/Adobe Acrobat - View as HTMLIndian Pump Manufacturers' Association. Shri C.S. Kasana,. Alternate ..... Indian Flameproof Mfrs. Association. Shri Nandakumar K. Principal ...www.bis.org.in/sf/competd.pdf - Similar pages -
UMARGAM INDUSTRIES ASSOCIATION
World chemical directory with chemical manufacturers, ... Products:, Electric Hoist,EOT Cranes,Good Lifts,Speciality Flame Proof Hoist. ...www.uiassociation.org/cgi-bin/via/search.cgi?query=Engineering&nh=8 - 136k - Cached - Similar pages -
are Exd products really safe?
Standards: Explosion Proof...Is It Really?
Instrument engineers are responsible for providing safe and appropriate instrumentation. To declare a system safe, simply because a single component is approved, is dangerous in more ways than one.
Two important factors should be considered whenever a job involves electrical equipment in a hazardous location:
1.) Safety. Is the equipment specified truly safe to use in the proposed environment? If the answer is yes, then on what premise is that answer based?
2.) Liability. If you have determined that the equipment specified is safe, are you prepared to defend that determination in a court room?
No one wants to be responsible for injuring others, especially when easily obtainable safeguards exist. In the event of an unfortunate incident, the consequences can be punitive if the injured party can prove that the designer did not take all reasonable and prudent measures to protect against predicable hazards.
In the event of an accident involving an explosion in a hazardous environment, the attorneys for the injured party will attempt to prove negligence on the designer's part. To do this, they usually will retain some individual or organization recognized as an expert in the field.
The designer might be asked what measures were taken to ensure that the equipment was safe. Then, their expert would attempt to point out items missed or not listed under direct examination.
In the United States, Factory Mutual Research Corp. (FMRC) is recognized as one of the experts in the field of industrial safety. For certain installations, many companies, local governments and regulatory agencies require that all electrical equipment must be approved by FM, Underwriters Laboratories (UL), and the Canadian Standards Association (CSA).
In general, these rules and regulations spell out the location's category by class, division and group. (See Definitions) When an installation requires that electrical-measuring instruments be placed in locations that are considered hazardous, it is incumbent upon the engineer to see that the installation is safe.
The user generally will specify the degree of safety required. For example, a petrochemical company could specify that supplied equipment must be explosion proof for Class I, Division 1, Group B.
The user is being very specific as to the level of security expected, referring to Article 500 of the National Electrical Code. Factory Mutual subscribes to this code and references it in their approval guide.In general, the classification defines the extent of the hazard, taking into account the energy required to ignite certain gas mixtures and the potential forces released as a result.
When an assembly is called explosion proof, the sensor assembly manufacturer is certifying to the user that specific steps have been taken to ensure the safety of all Plant personnel. But, no chain is stronger than its weakest link; likewise, no system is explosion proof if it contains non-explosion proof components.
Systems are rendered explosion proof by two means:
Design the system so that it cannot release sufficient electrical or thermal energy to ignite the specified gas mixture. Such systems are classified as intrinsically safe.
Design the system such that it is capable of containing an internal explosion of a specified flammable vapor air mixture and may contain sufficiently long thread paths such that any escaping gases will be cooled below the ignition temperature of the surrounding atmosphere.
Installing a temperature sensor in a hazardous location requires more than an approved explosion proof connection head. To meet the safety requirements of FM and CSA, you must consider the complete system: including the sensor, the thermowell (if required and used) and the connection head.
Each component in the system must meet the code. For example, many thermowells are supplied with 1/2-14 NPSM threads for the sensor connection. FM/CSA dictates that to meet the requirements for explosion proof, a tapered thread is required.
Most sensors are supplied with a 1/2-14 NPT thread; however, FM/CSA also specifies a minimum thread engagement between the sensor and the connection head. The thread engagement requirement makes it necessary to overcut the thermowell thread beyond the ASME definition of 1/2-14 NPT.
Those manufacturers wishing to offer explosion proof assemblies must meet FM/CSA's requirements. Once a design is constructed with the proper thread size and engagement between the head cover, head body, wire conduit and seal, sensor, lag fittings and thermowell, the manufacturer submits the design to FM/CSA for testing to ensure that the specified gas mixtures are properly contained.
Once approved by FM/CSA, the manufacturer is not permitted to alter any of the approved configurations without FM/CSA approval. If changes are necessary, FM/CSA may require additional testing before approving any changes. In addition, FM/CSA performs periodic unannounced inspections of the manufacturer's plant to ensure that the assemblies are constructed in accordance with the approved drawings.
With explosion proof assemblies, it is truly a case of ?you get what you pay for?. Using unapproved sensors or thermowells with an approved, explosion proof connection head, for example, will not provide the protection you need for your plant and personel.
Failure to consider the entire system, or failure to utilize the knowledge and resources of recognized experts in this critical area, is at best risky, and at worst dangerous and irresponsible.
To review this and more articles on temperature control please visit: www.rdfcorp.com
Posted by Admin on Friday, February 24, 2006 (1204 Reads)
more
Instrument engineers are responsible for providing safe and appropriate instrumentation. To declare a system safe, simply because a single component is approved, is dangerous in more ways than one.
Two important factors should be considered whenever a job involves electrical equipment in a hazardous location:
1.) Safety. Is the equipment specified truly safe to use in the proposed environment? If the answer is yes, then on what premise is that answer based?
2.) Liability. If you have determined that the equipment specified is safe, are you prepared to defend that determination in a court room?
No one wants to be responsible for injuring others, especially when easily obtainable safeguards exist. In the event of an unfortunate incident, the consequences can be punitive if the injured party can prove that the designer did not take all reasonable and prudent measures to protect against predicable hazards.
In the event of an accident involving an explosion in a hazardous environment, the attorneys for the injured party will attempt to prove negligence on the designer's part. To do this, they usually will retain some individual or organization recognized as an expert in the field.
The designer might be asked what measures were taken to ensure that the equipment was safe. Then, their expert would attempt to point out items missed or not listed under direct examination.
In the United States, Factory Mutual Research Corp. (FMRC) is recognized as one of the experts in the field of industrial safety. For certain installations, many companies, local governments and regulatory agencies require that all electrical equipment must be approved by FM, Underwriters Laboratories (UL), and the Canadian Standards Association (CSA).
In general, these rules and regulations spell out the location's category by class, division and group. (See Definitions) When an installation requires that electrical-measuring instruments be placed in locations that are considered hazardous, it is incumbent upon the engineer to see that the installation is safe.
The user generally will specify the degree of safety required. For example, a petrochemical company could specify that supplied equipment must be explosion proof for Class I, Division 1, Group B.
The user is being very specific as to the level of security expected, referring to Article 500 of the National Electrical Code. Factory Mutual subscribes to this code and references it in their approval guide.In general, the classification defines the extent of the hazard, taking into account the energy required to ignite certain gas mixtures and the potential forces released as a result.
When an assembly is called explosion proof, the sensor assembly manufacturer is certifying to the user that specific steps have been taken to ensure the safety of all Plant personnel. But, no chain is stronger than its weakest link; likewise, no system is explosion proof if it contains non-explosion proof components.
Systems are rendered explosion proof by two means:
Design the system so that it cannot release sufficient electrical or thermal energy to ignite the specified gas mixture. Such systems are classified as intrinsically safe.
Design the system such that it is capable of containing an internal explosion of a specified flammable vapor air mixture and may contain sufficiently long thread paths such that any escaping gases will be cooled below the ignition temperature of the surrounding atmosphere.
Installing a temperature sensor in a hazardous location requires more than an approved explosion proof connection head. To meet the safety requirements of FM and CSA, you must consider the complete system: including the sensor, the thermowell (if required and used) and the connection head.
Each component in the system must meet the code. For example, many thermowells are supplied with 1/2-14 NPSM threads for the sensor connection. FM/CSA dictates that to meet the requirements for explosion proof, a tapered thread is required.
Most sensors are supplied with a 1/2-14 NPT thread; however, FM/CSA also specifies a minimum thread engagement between the sensor and the connection head. The thread engagement requirement makes it necessary to overcut the thermowell thread beyond the ASME definition of 1/2-14 NPT.
Those manufacturers wishing to offer explosion proof assemblies must meet FM/CSA's requirements. Once a design is constructed with the proper thread size and engagement between the head cover, head body, wire conduit and seal, sensor, lag fittings and thermowell, the manufacturer submits the design to FM/CSA for testing to ensure that the specified gas mixtures are properly contained.
Once approved by FM/CSA, the manufacturer is not permitted to alter any of the approved configurations without FM/CSA approval. If changes are necessary, FM/CSA may require additional testing before approving any changes. In addition, FM/CSA performs periodic unannounced inspections of the manufacturer's plant to ensure that the assemblies are constructed in accordance with the approved drawings.
With explosion proof assemblies, it is truly a case of ?you get what you pay for?. Using unapproved sensors or thermowells with an approved, explosion proof connection head, for example, will not provide the protection you need for your plant and personel.
Failure to consider the entire system, or failure to utilize the knowledge and resources of recognized experts in this critical area, is at best risky, and at worst dangerous and irresponsible.
To review this and more articles on temperature control please visit: www.rdfcorp.com
Posted by Admin on Friday, February 24, 2006 (1204 Reads)
more
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