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SAFETY HIGHLIGHTS



High Viscosity Two- Phase Flow Relief System:

The design of a relief system for two-phase discharge can be complicated ,as it involves a fluid with a liquid-like density and a gas-like compressibility.  Moreover the fluid may flash as it loses pressure ,achieving choked flow at the valve's exit and thus, limiting the flow capacity of the relief system. The literature indicated that 30-40% of the relief devices that are in existence violate industry guideline for inlet pressure drop and backpressure. There are currently no broadly accepted methods for designing a relief system for HVTP flow. Many of the installed relief systems were designed using best industry practices such as the American Petroleum Institute's API-520, which details how to design emergency relief devices for low viscosity single-phase (gas, steam, liquid) system. The Occupational Safety and Health Administration .(OSHA; Washington, DC; www.osha.gov) Process Safety Management (PSM) rule, requires that the relief device design basis be documented and verified.

Qualify your design methods for high-viscosity two-phase relief systems against simple benchmarks.( CEP. June 2004) For expert opinion refer to (melhem@iomosaic.com)

 

New Safety Instrument System -(SIS) Standard - Smart Solution:

 

The newly released (SIS) standard concerning chemical process industries (CPI) designated as (IEC 61511) revolves around accumulated experience of (SIS) users and standard pertaining to safety equipment supplies and manufacturers. (IEC 61508).

    The new smart solution takes into account factors such as actual compliance with (IEC 61508) based on past performance and demonstrated data while selecting devices for (SIS) applications based on (IEC 61511) The compliance with (IEC 61508) is determined by third party inspection agencies such as (www.tuv.com)

    Texas based Emerson Process Management offers Plant Web Smart (SIS) safety solutions which could help users to choose instrument and control system speedily taking into account established track record of equipment and components (www.emersonprocess.com)

EMERSON PROCESS MANAGEMENT

(EXTRACTS)

Emerson Process Management Website HomeEmerson Corporate Business

      Emerson Process Management offers the industry's broadest array of process-automation products.

    Our technology know-how and application experience enable us to develop measurement and analytical instruments, final-control devices, and systems and software that deliver the proven performance and reliability our customers expect. And our open, standards-based PlantWeb architecture unleashes the power of intelligent field devices, systems, and software to deliver better process, plant, and business results.

    So it's not surprising that, in an independent survey, users have once again ranked our products first in more categories than any other supplier.  

Details. www.emersonprocess.com

 

  Noise control:

 
complete noise control and air filtration system for gas turbine is inclusive of  design, manufacture, and erect complete package that includes acoustics, intake system, exhaust system, and turbine enclosures.   www.stf.it  

  Legionella pneumophila in an ammonia plant cooling tower:

 

IN 1999 ,30 People died from infection by Legionella pneumophila bacteria after visiting a flower exhibition in The NETHERLANDS. This event prompted Kemira Agro Rozenburg to sample its cooling tower water at regular intervals for the presence of the Legionella bacteria.

         The result were consistently negative until the spring of 2000 when a sudden outbreak of the bacteria was detected. safety measure were implemented immediately,the cause of the outbreak was discovered , and measure were subsequently taken to prevent a reoccurrence.  

                               process safety progress.

 
EDUCATION AND SAFETY:

Major accidents in the chemical process industries continue to increase in size and number every year. Hard work of the safety and chemical engineering education (SACHE), committee of AlCHE’s center for chemical process safety (CCPS),and its group of 123 members universities will have  a positive impact on this performance.

                                        process safety progress.

 

 

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