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Ankur's_Chemical_Engg_Blog



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Human Factors Engineering In The Chemical Process Industry

Posted by ankur2061 , in Management 17 May 2012 - - - - - - · 131 views
human, engineering, factors and 3 more...
Human Factors Engineering In The Chemical Process Industry Something new and interesting came up recently while I was checking some documents. This was related to "Human Factors Engineering" (HFE) related to an upstream oil & gas engineering installation. Today's blog entry is a kind of primer on HFE in context to the chemical process industry.

Let us start with the general definition of...



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Refinery Tankages

Posted by ankur2061 , in Technical 10 May 2012 - - - - - - · 316 views
refinery, tankage, tanks
Refinery Tankages Quite sometime back, in one of my previous organizations there was some talk into diversifying into the business of providing engineering services for petroleum refining industry. We were all very excited about it and all of the process engineers were asked to take up some background study related to a specific topic in petroleum refining.

Since the...



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Minimum Safe Flow For Centrifugal Pump

Posted by ankur2061 , in Technical 26 April 2012 - - - - - - · 740 views
minimum, safe, flow, centrifugal and 1 more...
Minimum Safe Flow For Centrifugal Pump Minimum Safe Flow for pumps has been discussed on numerous occasions on "Cheresources". Many posts have discussed the line sizing, flow control and the scheme for common minimum flow piping from multiple pumps operating in parallel.

Let us discuss pump minimum flow as defined by "API STD 610 - Centrifugal Pumps for Petroleum, Petrochemical...



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Some Notes On Corrosion In Upstream Oil And Gas

Posted by ankur2061 , in Technical 13 April 2012 - * * * * * · 795 views
corrosion, upstream, oil, gas and 1 more...
Some Notes On Corrosion In Upstream Oil And Gas Corrosion Control:
Corrosion control is required when the calculated general corrosion rate cannot be accommodated by reasonable corrosion allowances for carbon steel, as listed in the attached table. For example, if the predicted corrosion rate is 10 mils per year (mpy) for a heat exchanger shell with a 20 year design life, a corrosion allowance of...



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Heavy Hydrocarbon Recovery From Natural Gas

Posted by ankur2061 , in Technical 29 March 2012 - * * - - - · 1,380 views
heavy, hydrocarbon, recovery and 2 more...
Heavy Hydrocarbon Recovery From Natural Gas I have had several questions asked by entry level process engineers and even chemical engineering students studying petroleum engineering, about the various methods employed for heavier hydrocarbons recovery from natural gas and which one is better. While mentioning that there are many older methods which are gradually being phased out and newer methods...



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Importance Of An Hse Engineer In The Chemical Process Industry

Posted by ankur2061 , in Technical 16 March 2012 - - - - - - · 1,300 views
hse, engineer
Importance Of An Hse Engineer In The Chemical Process Industry To begin with, let me inform the readers of my blog that I do have basic knowledge related to "Health, Safety & Environmental" (HSE) engineering but I am not an expert on the subject.

In one of my previous jobs, there was a separate process engineering department with about 15 engineers who were led by me and a separate HSE department led by...



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Determining Hydrate Formation Temperature

Posted by ankur2061 , in Technical 29 February 2012 - * * * * * · 2,675 views
hydrate, formation, temperature and 1 more...
Determining Hydrate Formation Temperature Hydrates are crystalline solid compounds formed from water and smaller molecules in hydrocarbon fluids such as methane, ethane, propane, nitrogen, carbon dioxide and hydrogen sulfide.

Hydrates are a nuisance, since they can block pipelines leading to stoppage of...



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Compressor Surge And Anti-Surge Control

Posted by ankur2061 , in Technical 21 February 2012 - * - - - - · 3,365 views
compressor, surge, control and 1 more...
Compressor Surge And Anti-Surge Control Compressor surge has been discussed often on the forum with many posts dedicated to the subject. Despite all these discussions there was a serious lack of the basic scheme of anti-surge control. Today's blog entry tries to remedy the situation. I am presenting an excel attachment related to basic anti-surge control which should help all those who have...



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Some Utility Consumption Estimates

Posted by ankur2061 , in Technical 14 February 2012 - * * * * - · 2,220 views
utility, consumption, estimates
Some Utility Consumption Estimates As part of preparing a process discipline manual for one of my previous organizations, one section that I had prepared was "Guidelines for Preparation of Utility Summary". This document besides containing an excel template for utility summary also had some guidelines for determining the consumption of utilities such as instrument air, cooling...



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Short Cut Formulas For Gas Densities At Various Standard Conditions

Posted by ankur2061 , in Technical 10 February 2012 - - - - - - · 2,215 views
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Short Cut Formulas For Gas Densities At Various Standard Conditions Dear all,

I have been posed by many young entry level engineers about standard gas density calculations which I do in a jiffy using a calculator. I will try to summarize these below:

As a basic we are all supposed to know that gas density is calculated as:

rho = P*M / R*T*Z ------------- 1

or

rho = M / ((R*T*Z) / P) ----------- 2

where:

rho = gas...



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Engineering Applications Available For Iphone

Posted by ankur2061 , in Technical 27 January 2012 - * * * * * · 2,204 views
iphone, engineering, apps and 1 more...
Engineering Applications Available For Iphone Are you a gadget lover, and are you a fan of "Apple" products? Besides being a gadget lover and an admirer of Apple, do you also happen to be an engineering student or an engineeering professional with the zest to do quick calculations while on the move?

If the answer to the above questions is yes, then you will simply love the iPhone for the...



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Filament Yarn / Fiber Quench Air Systems

Posted by ankur2061 , in Technical 17 January 2012 - - - - - - · 1,139 views
filament, yarn, fiber, quench and 2 more...
Filament Yarn / Fiber Quench Air Systems I spent a long part of my career, both operations and design in Polyester Synthetic Fiber(filament yarn and staple fiber) including operations and engineeering design. During my stint as a process design engineer involved in design of polyester plants including Polyester Filament Yarn and Polyester Staple Fiber plants one of the key requirements was finding...



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Vendor Database – The Achilles Heel Of Engineering Companies

Posted by ankur2061 , in Management 20 December 2011 - * * * * * · 1,889 views
vendor, database, engineering and 1 more...
Vendor Database – The Achilles Heel Of Engineering Companies I am not delving into Greek mythology. The title is a metaphor indicating that lack of a good vendor database is a weak point of many engineering companies. Absence of a proper database is an obstacle in providing good quality engineering services as well as enabling timely completion of the engineering...



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Material Selection For The Oil And Gas Industry

Posted by ankur2061 , in Technical 17 December 2011 - - - - - - · 2,422 views
material, selection, oil, gas and 6 more...
Most process engineers are unaware of material selection and shy away from the task of providing material selection saying that a corrosion specialist needs to do the job.

What if you do not have the services of a corrosion specialist and you need to provide some quick answers for material selection as a process engineer. This blog entry attempts to give...



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The Art Of Responding To Queries On An Engineering Forum

Posted by ankur2061 , 10 December 2011 - - - - - - · 1,658 views
responding, queries, questions and 2 more...
I have been a member of Cheresources for the last 4-1/2 years. When I started out on the forums I had little idea of how questions need to be answered on a forum. I observed a lot of veterans on the forum including the administrator Art Montemayor on how they took up the task of answering queries posted by students, professionals and specialists and I...



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Erosion Due To Flow

Posted by ankur2061 , in Technical 06 December 2011 - - - - - - · 1,373 views
pipe, erosion, flow
Erosion can be defined as the mechanical loss of material by the impact of solid particles (e.g. sand, certain hard scales, catalysts) and / or liquid droplets.

Erosion caused failures are not new. The oil and gas industry has suffered and continues to face many failures that can be attributed to erosion.

Under aggressive operating conditions, flow...



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Gas Flotation For Waste Water Treatment

Posted by ankur2061 , in Technical 26 November 2011 - * - - - - · 1,105 views
gas, flotation, waste, water and 1 more...
Gas Flotation is one of the oldest methods for removal of solids, oil & grease and fibrous materials from waste water. It is part of the primary treatment of waste water. Removal efficiencies can be as high as 99%+ for suspended solids and oil and grease. Gas flotation is simply the process of generating microscopic gas bubbles in the container (tank /...



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Equivalent Length Calculations For Pipe Fittings And Valves

Posted by ankur2061 , in Technical 17 November 2011 - * * * - - · 2,193 views
Reducers, Elbows and 2 more...
November 16, 2011 is kind of a momentous day in my life. 25 years ago on this very day a young girl joined hands with me and both of us pledged our love and devotion to each other till death do us apart. This woman has stood by me through all the ups and downs in this long journey of 25 years. She has primarily been responsible for our children growing up...



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New Multiphase Flow Transient Analysis Software - Ledaflow

Posted by ankur2061 , in Technical 31 October 2011 - - - - - - · 754 views
multiphase, transient, flow and 2 more...
Being in the upstream oil and gas field the subject of flow assurance related to multiphase flow in pipelines is something that cannot be ignored. While the commonly used softwares such as PIPESIM, PIPEPHASE, TLNET and TGNET are adequate for most flow assurance studies the subject of transient analysis for multiphase flow is a complex one. PIPESIM does not...



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Standard Conditions Of Temperature And Pressure

Posted by ankur2061 , in Technical 24 October 2011 - * * * * * · 914 views
STP, standard, conditions and 2 more...
A lot has been said about standard conditions of temperature and pressure in chemical engineering texts, international standards (API, ISO, DIN, JIS etc.). Probably the best reference to this very debatable topic is the “Wikipedia” article given at the following link:
...



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