Archives :: Environmental, Health & Safety :: Plant & Personnel Safety :: Overpressure & Runaways

Displaying 41 - 47 of 47 stories.
April 15, 2008
A good understanding of the reaction chemistry is needed for a safe process design It is a fact that safety-related incidents do occur in the chemical process industries (CPI). These incidents have, in part, led to increased attention to reactive-chemical issues by industry, government and other stakeholders. We know that good safety-management systems take the reactivity of chemicals as well as the...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/Environmental-Manager-A-Checklist-for-Safer-Chemical-Batch-Reactions_3800.html
February 15, 2008
The failure of a device or of a group of components can lead to overpressurization and subsequent adverse events, such as fire, explosion, spill or release. The most common causes of overpressurization are listed below. Understanding the circumstances surrounding overpressurization will help an engineer to avoid these failures. External Fire According to API RP 520 and 521 standards, a fire-exposed area is...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/Causes-of-Overpressurization_3671.html
December 15, 2007
This article introduces a simple yet accurate way to calculate the wetted surface area of a partially filled horizontal vessel with semi-elliptical heads. This information is often needed for the sizing of relief devices. API Recommended Practice 521 specifies that a vessel containing liquid, mounted such that its lowest point is less than 7.62 m (25 ft) above ground level, must be fitted with a...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/Engineering-Practice-Accurate-Wetted-Areas-For-Partially-Filled-Vessels_3562.html
November 15, 2007
Steam traps are an integral part of steam systems in the chemical process industries (CPI). Steam is commonly used to add energy into a process through its latent heat (steam heat), while the resultant sensible heat (hot condensate) drains through steam traps. The operation of these traps influences the entire steam system’s function and reliability. Steam trap operation has a bearing on the...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/The-Importance-of-Intensive-Steam-Trap-Management_3496.html
July 1, 2007
    Traditional pressure-relief devices are, at times, unable to protect vessels at the elevated temperatures experienced during fires. As witnessed by numerous examples throughout history, loss of containment and the subsequent explosions that may occur with an over-pressurized system can lead to catastrophic results in terms of equipment damage, monetary loss, environmental impact and even...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/Emergency-Pressure-Relief-For-External-Fire-Scenarios_3126.html
December 1, 2006
    Even with the best process design, the unexpected can happen. Anticipating this, rupture disks are often installed as the last line of defense against the over-pressurization of equipment used for the manufacture, transport and storage of many types of chemicals, petrochemicals, medicines, plastics, powders, food and beverages. When handled and installed properly, rupture disks are a safe and...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/Troubleshooting-Field-Failures-of-Rupture-Disks_2790.html
March 1, 2006
    Solvents have been used for centuries and in all type of industries for the processing, manufacturing and formulation of goods. In the chemical process industries (CPI), solvents are used in various process-operation steps such as separation (of gas, liquid and/or solid), reaction (as reaction medium, reactant, and carrier), degreasing, washing and many more. As part of product formulations...
http://www.chemengonline.com/environmental_health_and_safety/plant_and_personnel_safety/overpressure_and_runaways/A-Modern-Approach-to-Solvent-Selection_2775.html
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