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Ankur's_Chemical_Engg_Blog



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Importance Of An Hse Engineer In The Chemical Process Industry

Posted by ankur2061 , in Technical 16 March 2012 - - - - - - · 15,733 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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8 Comments

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Determining Hydrate Formation Temperature

Posted by ankur2061 , in Technical 29 February 2012 - * * * * * · 41,629 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 - * - - - - · 29,440 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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11 Comments

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Some Utility Consumption Estimates

Posted by ankur2061 , in Technical 14 February 2012 - * * * * - · 31,569 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 - * * * * - · 35,293 views
gas, density, short, cut and 3 more...
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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5 Comments

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Engineering Applications Available For Iphone

Posted by ankur2061 , in Technical 27 January 2012 - * * * * * · 11,460 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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7 Comments

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Filament Yarn / Fiber Quench Air Systems

Posted by ankur2061 , in Technical 17 January 2012 - - - - - - · 13,244 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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Material Selection For The Oil And Gas Industry

Posted by ankur2061 , in Technical 17 December 2011 - - - - - - · 18,999 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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8 Comments

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Erosion Due To Flow

Posted by ankur2061 , in Technical 06 December 2011 - * * * * * · 124,217 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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20 Comments

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Gas Flotation For Waste Water Treatment

Posted by ankur2061 , in Technical 26 November 2011 - * - - - - · 15,710 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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6 Comments

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Equivalent Length Calculations For Pipe Fittings And Valves

Posted by ankur2061 , in Technical 17 November 2011 - * * * * - · 66,614 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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28 Comments

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New Multiphase Flow Transient Analysis Software - Ledaflow

Posted by ankur2061 , in Technical 31 October 2011 - - - - - - · 19,975 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 - * * * * * · 25,212 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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Boiler Feed Water - Impurities, Treatment, Blowdown And Cycles Of Concentration

Posted by ankur2061 , in Technical 11 October 2011 - * * * * - · 23,843 views
boiler, feed, water, impurities and 4 more...
Quite sometime back during my tenure in Saudi Arabia, I was involved in a project related to a large-capacity, gas-fired, D-type water tube boiler. The capacity of the boiler was 530,000 lb/h (240 TPH).

During that time I had been studying about the requirement and design calculations for boiler feed water (BFW) for the boiler since it was part of the...



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13 Comments

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Centrifugal Compressor Seal Systems

Posted by ankur2061 , in Technical 28 September 2011 - * * * - - · 14,197 views
centrifugal, compressor, seal
The subject of compressors has been fascinating me since the last few years which I have also mentioned in one of my earlier blog entries 'Polytropic Efficiency as a function of Inlet Volume Flow'.

Recently a client came up with a problem of their centrifugal compressor seal failure and asked us to investigate it. Although the subject of compressor...



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3 Comments

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Flow Meter Comparison - Quick Compilation Of The Web Resources

Posted by ankur2061 , in Technical 15 September 2011 - * * * * - · 7,233 views
flow, meters, web, resources
Flow meters are a subject of frequent discussion on the 'Chereources' forum. Some of the typical questions related to flowmeters can be described as below:

1. For my application I need to measure the flow. Please suggest the type of flowmeter I should install?

2. I have a flow meter for a particular application. Presently we are facing problem of...



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2 Comments

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Biochemical Oxygen Demand - Industrial Waste Water Management

Posted by ankur2061 , in Technical 08 September 2011 - * * * * * · 6,978 views
bod, oxygen, demand, industrial and 2 more...
A lot has been written and said about the subject of BOD. But very few know that BOD5 is calculated using simple concentration formulas from laboratory tests. However, before going into the calculation part let us start from the fundamentals of BOD.

Wikipedia defines BOD as follows:

Biochemical oxygen demand or B.O.D. is the...



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A Refresher On Pump Cavitation And Npsh

Posted by ankur2061 , in Technical 25 August 2011 - * * * * * · 11,507 views
blog, understading, npsh and 2 more...
There have been numerous articles on the subject item and most standard textbooks in chemical engineering provide quite a detailed description on what pump cavitation and NPSH is. Despite all the literature available on the subject, the debate related to pump cavitation and NPSH continues which is evident from the numerous postings related to the subject...



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6 Comments

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A Detailed List Of Books For Process Design Engineering

Posted by ankur2061 , in Technical 16 June 2011 - - - - - - · 3,512,885 views
process, design, engineering and 1 more...
Often in the forum there are questions about which book or published resource to refer for a particular subject in process engineering. If we look around the list is huge and sometimes some engineer may have access to some book whereas the other person may have access to another book. Apart from the standard chemical engineering texts during the...



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26 Comments

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Estimation Of Saturated Liquid Density

Posted by ankur2061 , in Technical 15 May 2011 - - - - - - · 6,356 views
saturated, liquid, density and 1 more...
More than a year ago I had unilaterally made a post in the "Industrial Forums" sub-forum a post with the title "Estimation of Saturated Liquid Density" along with a spreadsheet. I had thought it was a pretty decent spreadsheet for calculating liquid densities below the critical temperature (saturated liquid) for some non-polar compounds....



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