Posts Tagged ‘ pressure vessel ’

A Must Have List of Safety Inspection Checklist

Safety inspection is a regular safety job that is purposed to ensure that equipments, tools, work conditions, work area, plant facilities and so on have already met minimum safety requirements. It is carried out in order to detect any safety deficiencies as early as possible so that accident can be avoided.

Successful safety inspection requires reliable tool that’s a checklist. Safety inspection checklist lists up inspection items that need to be conformed. Such checklist is main reference for safety inspection job. With it, safety inspection will obtain consistent results.

Generally, safety inspection checklist can be obtained from equipment manuals, operation manuals, safety standards, expert advises and experiences. Ideally, you have all the required checklists. However, some of you may not know what kinds of safety inspection checklists are required in your plant site.

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6 Common Mistakes Made in Safety Valve Installation

There are many safety equipments used for releasing or controlling over pressurization in chemical plant operation. One of the most common types is safety valve. Safety valve prevents equipment and piping from damage due to over pressure by releasing certain amount of fluid into the atmosphere.

Safety valves are installed on pressure vessels or high pressure pipe line. They serve as protecting devices. However, because of improper installation, safety valves could do nothing to protect the equipment from over pressurization. So, it is very important to avoid common mistakes made during safety valve installation.

Improper installation of safety valve could endanger plant equipments as well as safety of workers and people inside plant site. You have to know common types of those miss-installations. Here are six common mistakes made in safety valve installation. (more…)

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11 Basic Facts That You Should Know About Rupture Disk

Rupture disk is one of important safety devices that are commonly found inside chemical plant. Rupture disk or bursting disk is installed to protect system, pressure vessel or equipment from over pressure and or damaging vacuum condition. It is a non-reclosing pressure relief device, according to ASME Code Section VIII, Division 1, 1988 edition.

Over pressure or extremely vacuum condition can cause catastrophic failure and death. So, rupture disk holds an important role to protect plant facility and workers’ safety.

Due to its undoubtedly vital function, it is very important to understand the basic fact about rupture disk. Keep reading this article to know the 11 basic facts that you should know about. (more…)

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Understanding LEL of Common Combustible Gases

by Lukman Nulhakiem

LEL-of-common-combustible-gasesThere are many common combustible gases found in chemical plant. These combustible gases have one similarity. They can be ignited when their concentration in air are within their flammability limits.

What are flammability limits? Flammability limits or commonly known as explosive limits are defined as concentration of combustible gas in mixture with air in which they can be ignited and exploded in the presence of source of ignition.

The lowest concentration of a combustible gas in mixture with air where it still can be ignited is called by Lower Explosive Limit (LEL) or Lower Flammable Limit (LFL). Whereas, the highest concentration of a combustible gas in mixture with air where it still can be ignited is called by Upper Explosive Limit (UEL) or Upper Flammable Limit (UFL). (more…)

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Pressure Vessels Safety Video

Pressure vessels are typical hazard sources in chemical plants. Due to their high operating pressure, pressure vessels can present more complex hazards such as explosion, fire and hazardous chemicals, than atmospheric vessels.

Good pressure vessels design and proper preventive maintenance program are exactly required to prevent chemical plant accident. According to Chemical Safety Board (CSB) of America, improperly installed or modified pressure vessels have led to a number of serious chemical accidents. One of the serious accidents was the explosion at Sonat Exploration Co, Pitkin, Louisiana, US, in 1998. (more…)

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Safety Inspection Checklists

safety-inspection-checklistPlant safety inspection is purposed to examine all parts of the workplaces, as I mentioned in my previous post, plant safety inspections. This time I would like to show you an example of plant safety inspection checklist. This checklist is a guidance that you will require when performing a plant safety inspection at the plant site.

This safety inspection checklist may not be fully matched with your system, due to uniqueness of your plant. However, there may be some questions that will suit the plant. It is expandable in order to meet your system requirement as closely as possible.

Answer the questions below. Mark it with YES or NO. All questions shall be answered, no exception. (more…)

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Confined Spaces Definition

confined-spacesIn this post, we will talk about confined spaces definition. After reading this post, it is hoped that you could easily recognize confined spaces in the plant site and provide adequate hazard control against confined spaces hazards.

By definition, confined spaces mean spaces that are large enough spaces where workers can bodily enter and perform assigned works. Confined spaces, which can easily found in chemical plant site, at least have the following characteristics:

a. Have limited or restricted openings/ways for entry and exit.
b. Not designed and purposed for continuous workers occupancy.
c. Have poor natural ventilation.

According to the above definition, we should be able to identify all of the confined spaces exist in the plant site. And I believe we can easily identify them. Below are confined spaces that are commonly found in chemical plant site. Just add them through comment column if you would like to add another one and share with other readers

1. Solvent tanks
2. Pressure vessels
3. Boiler
4. Reaction towers
5. Product tanks
6. Gas holder
7. Absorber column
8. Kiln
9. Calciner
10. Resin exchanger column
11. Large piping line
12. Bulk chemical container

I have many experiences working in confined spaces during my assign work in chemical plant site. Storage tanks, pressure vessels and reactors are some of confined spaces that I had entered. Special precautions have to be fully given during work in confined spaces, otherwise accident will probably occur.

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