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Chemical Process Technology

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Chemical & Process Technology

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Sunday, March 30, 2008

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If you are plant or maintenance engineer in Chemical & Process plant, you may check out IDCON. This site contains many useful plant maintenance and reliability tips. Most of the tips are presented in brief and short. No long article to be read. Why not check it out ? Following is a quick list and associated links of what are available so far in IDCON. Normally will publish tips in monthly basis...

For most updated listing and current tip...Check out in CURRENT TIPS...

Feb 2008 Maintenance Managers – Do you have a clear...
Jan 2008 What's a "Root cause"?
Dec 2007 Long-lasting change in maintenance?
Nov 2007 Setting Maintenance Priorities
Oct 2007 Maintenance Key Performance Indicators (KPI's)
Sept 2007 Adjusting packed centrifugal pumps with open impellers
July 2007 Defining "Maintenance costs"
June 2007 Using corrective maintenance work plans to ...
Feb 2007 Maintenance Management for Supervisors
Oct 2006 Reliability Centered Maintenance (RCM)
Sept 2006 What is the Core Knowledge in Root Cause Analysis?
Feb 2006 Maintenance Planner’s Checklist
Jan 2006 Digital cameras
Dec 2005 A Planner's tool kit
Nov 2005 Root Cause Problem Elimination. A tool for an elite ..
July 2005 Managing Maintenance
May 2005 Root Cause Analysis (RCA)
April 2005 Maintenance Planning
Jan 2005 Industrial Preventive Maintenance (PM)
Nov 2004 Root Cause Failure Analysis (RCFA) or Trouble....
Oct 2004 Spare Parts Management Indicators
Sept 2004 Reliability Management - Change
Aug 2004 Plant Maintenance - Deciding if Components ...
May 2004 Case study - Results of Condition Monitoring
March 2004 Basic Principle of Hydraulic Motor
Feb 2004 Philosophy: Maintenance work
Jan 2004: Philosophy: Planning & Scheduling
Dec 2003: Philosophy: Inspection Interval
Nov 2003: Definition: “Preventive Maintenance” (PM)
Oct 2003: Technique: Inspection
Sept 2003: Technique: The smart hook
Aug 2003: Technique: Benchmarking
July 2003: Technique - Vacuum pump
June 2003: Tools: Grease gun with cordless power and .....
May 2003: Technique: Dirt is bad for bearings
April 2003: Definition: Break-in jobs
March 2003: Technique: Steam Trap
Feb 2003: Technique: Hydraulic
Jan 2003: Philosophy: Planning & Scheduling
Dec 2002: Technique: Alignment
Nov 2002: Technique: Belts

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posted by Webworm, 4:01 AM | link | 0 Comments |

Wednesday, December 12, 2007




Many Shell and Tube heat exchangers are provided in Chemical and Process plant for heat exchanging, heat recovery and integration for energy saving. There are many issues associate with Shell and tube heat exchanger such as corrosion, fouling & scaling, heat transfer efficiency drop, cleaning and maintenance, etc.


One of the way to minimize and avoid above mentioned issues is applying protective coating on the tubes. The benefits are :
  • CORROSION - Coating avoid corrosive contact with tube material and avoid corrosion. Extra corrosion allowance or corrosion resistance material is required. If severe corrosion occur, retubing may be required.
  • FOULING & SCALING - Coating avoid sticky fluid contact with tube material and stay as fouling & scale.
  • HEAT TRANSFER EFFICIENCY - Fouling & scaling will reduce heat transfer efficiency and more heat transfer area required. This will increases the heat exchanger capital investment.
  • CLEANING & MAINTENANCE - Fouled heat exchanger shall be shutdown for cleaning and maintenance. In some event, chemical cleaning may be required. This increases heat exchanger operating and maintenance cost and also increases downtime and reduce plant availability.
  • COST EFFECTIVENESS - In some configuration and operating condition, coating compare to corrosion resistance material, coating may turn out to be very cost effective.

Curran International (CI) is one of the heat exchanger tubing coating service provider. Edward Curran from CI has published an article in Chemical Processing.com.


On the other hand, there are disadvantages for coating. One of the major issue is the reliability of coating stay in tubing without dropping-off. Lost of coating layer may put the heat exchanger in unsafe operation without operator awareness and potentially lead to catastrophic consequence. This is an major issue alway debate till no conclusion and receive a lot of challenges.

What do you think about coating tubing ? Is any of your heat exchanger tubing coated ? Why not share you experience here ?

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posted by Webworm, 9:30 AM | link | 0 Comments |

Friday, July 20, 2007


If you plant / maintenance engineers, you probably interested to the following articles...

POLARIS, a Heat Exchanger manufacturer from Denmark. POLARIS supply Plate-and-Frame, Brazed, Safety-Pair Double-Wall Plate, Semi-Welded Plate and Free-Flow Plate Heat Exchangers.
FREE Operation and Maintenance Manual Available for download from POLARIS

Simpel operation guideline presented in the manual for Brazed Heat Exchanger. It covers how a brazed heat exchanger is operated, application, specification and advantages of brazed heat exchanger, installation guide, start-up & shutdown as well as cleaning procedures.

Plate-and-Frame Heat Exchanger Operation and Maintenance Manual
This manual briefly discusses a Plate Heat Exchanger Construction, function and characteristic, the gasket design, installation and start up procedures, maintenance & cleaning procedures.
Further reading...









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posted by Webworm, 8:20 AM | link | 0 Comments |