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November 14, 2007

Gate Valve, Globe Valve, Check Valve Description

If you're seriously interested in knowing about Gate Valve, Globe Valve, Check Valve, you need to think beyond the basics. This informative article takes a closer look at things you need to know about Gate Valve, Globe Valve, Check Valve Description.

Type of Valve

Item Description for the

Material Specification

Other Information Specified in the

Technical Specification

Gate Valve

1. Body Material

2. Trim Material (Including Seat)

3. Rating of Valve

4. Ends - Socketweld

- Threaded

- Flanged - Type of Facing

5. Design Code

6. Shape - BB, BG, OS&Y

- SB, ISS(ISRS)

7. Lantern Ring/Plug (if Client specifies)

8. Wedge/Disc Shape (if Client specifies)

9. Port Size - Reduced

- Full

10. Operator - Handwheel

- Gear Operator

 

1. Gasket

2. Bonnet Bolting

3. Gland Packing

4. Gland Bolting

5. High Pressure Pneumatic Shell Test

6. Non-Destructive Testing (NDT)

Globe Valve

1. Body Material

2. Trim Material (Including Seat)

3. Rating of Valve

4. Ends - Socketweld

- Threaded

- Flanged - Type of Facing

1. Design Code

2. Shape - BB, BG, OS&Y

- SB, ISS(ISRS)

3. Lantern Ring/Plug (if Client specifies)

4. Port Size - Reduced

- Full

5. Operator - Handwheel

- Gear Operator

1. Gasket

2. Bonnet Bolt and Nut

3. Gland Packing

4. Gland Bolt

5. High Pressure Pneumatic Shell Test

6. Non-Destructive Testing (NDT)

Check Valve

1. Body Material

2. Trim Material (Including Seat)

3. Rating of Valve

4. Ends - Socketweld

- Flanged - Type of Facing

- Wafer - Type of Facing

5. Design Code

6. Type - Piston-Lift, Swing, Wafer, Ball-Lift, Single Plate, Dual Plate, Wafer-Lug, Double Flanged

7. Port Size - Reduced

- Full

8. Cover - Bolted Cover, BC

- Threaded Cover

- Screwed Cover

9. Drain Connection (if Client specifies)

 

 

1. Gasket

2. Cover Bolt and Nut

3. High Pressure Pneumatic Shell Test

4. Non-Destructive Testing (NDT)

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November 15, 2007

Choke Valve

A choke valve is a valve that changes the flow rate of the fluid at very high operating pressures with only a slight pressure drop.  It is also used when changing the conditions of a line from high pressure, high flow rate to a lower pressure, lower flow rate.  It is capable of handling erosive fluids with sand and grit.  This valve is typically used in wellheads before the fluid is brought to the process area.

HERE ARE TYPICAL INFORMATION TO VENDOR

1. Item No.
2. Quantity
3. Type
4. Size and Connection
5. Fluid Service
6. Operating Condition
a. Temperature
b. Pressure
7. Design Condition
a. Temperature
b. Pressure
8. Corrosion Allowance
9. Flow rate
10. Specific gravity
11. Viscosity
12. Pressure Drop
13. Maximum Pressure Drop
14. Material
a. Body
b. Trim
c. Bolt and Nuts
d. Bonnet Gasket
e. Gland Packing
15. NDE
16. Location
a. Line Numbers
b. Line Class

SOME CHOKE VALVE VENDOR

1. Mokveld            http://www.iceweb.com.au
2. Master Flo Valve Inc.     http:// www.masterflo.com
3. Cor-Val Inc.          http://www.corval.com

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Spring Loaded Ball Valve

A spring-loaded ball valve is a manual valve that closes or opens automatically using a spring.  Once operated, this valve remains in its operating position only as long as the handle is held firmly by the person operating the valve, by a cable or other similar means.  As soon as the handle is released from the operating position, it springs back to its inoperative position.  Most valve/handles are designed to spring-to-close.  A common application is in toxic service lines where it is important that once an accident occurs, and the operator becomes unconscious, the valve is closed immediately. 

HERE ARE TYPICAL INFORMATION TO VENDOR

1.
1. Fluid
2. Design Condition
* Pressure
* Temperature
3. Valve Type
4. Size
5. Rating
6. End Connection
7. Valve Specification
* Design Code
* Body and Ball Construction
* Bore
* Pattern
* End Connection
* Facing Finish
* Heat Treatment
* Actuator
* Material Specification
a. Body
b. Ball
c. Stem
d. Gland
e. Seat Ring
f. Bonnet Gasket
g. Stem Packing
h. Bolting
8. Location
* Equipment No.
* Line No.
* Line Class
9. Service Category

SOME SPRING LOADED BALL VALVE  VENDORS

1. Kitz
2. Kitamura
3. Jamesbury

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Strainers

A strainer is a device used to provide a mechanical means of removing solids from a flowing liquid or gas by using a barrier.

Strainers are classified into three categories:

(1) Simplex
A strainer consisting of a single element chamber that normally requires the flow through the unit to be shutdown before cleaning.

Conical Strainer  -    serves as temporary strainer for temporary installation during the commissioning, or start up service for the efficient removal of solids/debris for the protection of Fluid and Gas handling equipment from damage.  This can be installed either vertically or horizontally.  Also, it can be manufacture using any kind of wire mesh or perforated plate, in carbon steel and stainless steel or in alloys.
        

Y”-Type Strainer  -     economical method of protecting the pipeline equipment by removing solids/debris from flowing liquid or gas.     
        
        
T-Type Strainer  -    fabricated to satisfy any filtration requirements and provide a very high filtering area, therefore ensuring a very low pressure drops.
               

Bucket Type Strainer  -    Simple and efficient method of protecting the vital pipeline equipment by removing of solids/debris and reducing expensive plant maintenance.          
     
    
(2) Duplex or Multiplex
A strainer usually consisting of at least two elements chambers separated by a valve that permits continuous flow of fluid through one chamber while the other is accessible for cleaning.

(3) Automatic (Self Cleaning)
A strainer providing some means of back flushing or cleaning of the straining element while the unit is in service.
   
HERE ARE TYPICAL INFORMATION TO VENDOR

1. Item Number
2. Type
3. Size
4. Quantity
5. Connection
* Screwed
* Socket weld
* Flange
6. Fluid
7. Design Condition
* Pressure
* Temperature
8. Operating Condition
* Pressure
* Temperature
* Specific Gravity
* Viscosity
9. Materials
* Body
* Perforated PLATE
* Screen
* Screen Mesh
* Diameter of Wire
10. Location
* Line No.
* Line Class
11. Remarks

SOME STRAINERS VENDORS

1. Douglas Italia S.p.a         http://www.douglas-chero.com
2. Vee Bee Limited            http://www.veebee.co.uk/
3. Koyo Seisakusho Co. Ltd.
4. Plenty Filters            http://www.plenty.co.uk
5. Spirax Sarco Inc.            http://www.spirax-sarco.com.au
6. YAC Filter Systems Corp.
7. Mueller Steam Specialty
8. BP Flow Equipment

 

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November 17, 2007

Chemical Engineering Software

Pressure Drop via the Karman Method
Mr. Daan Le Roux of SASOL shares his spreadsheet based on the Karman pressure drop method as featured in the June 2006 edition of CEP Magazine.
 
Chemical Plant Cost Estimation
Ever wonder what really goes into estimating the cost of a world scale chemical production facility?  Here is a sample of such a spreadsheet used for a project in India.  Build your own from this sample which includes virtually all of the economics that need to be considered.
 
2005 MS Excel Spreadsheet Competition
These are some of the best entries received during the 2005 spreadsheet competition:

Steam Tracing (Winner)
Vapor Pressure from Antoine Coefficients
Column Diameter and HETP Calculation
Packed Column Scrubber Design
Reactor Particle Size and Velocity Calculation
Condensate Line Sizing

 
Two Phase Flow in Pipes
Download this easy to use spreadsheet to estimate pressure losses in pipes with two-phase flow.
 
Various Chemical Engineering Calculation Spreadsheets
Zip file with Excel spreadsheets including calculations such as: unsteady state heat transfer, horizontal vessel calibration data, catenary equations, compressible flow calculations, cone and circle geometry, control valve sizing, dewpoints of acidic gases, duct calculations, orifice sizing, packed scrubber design, flat plate deflections, pump performances, and rectangular weir flow.  These spreadsheet provided by Mr. Neil Stone of Esco Engineering.
 
Filtration Spreadsheets from Dr. Richard Holdich
Calculations include specific surface area, compressible cake at constant pressure, compressible cake at constant flow, power law equation, pressure leaf clarification costing, and rotary vacuum filtration.  Complete with documentation.   Files are in Excel format, download as a zip file.
 
Vessel Pressure via the SRK Equation of State
Use this Excel spreadsheet to find the pressure inside a vessel via the SRK equation of state (EOS).  Brought to you by the Direction of Software Corner, Somak Mukherjee
 
Fired Furnace Excess Air Calculation
Calculate the excess air volume required for a hydrocarbon furnace with the Orsat analysis.  Excel spreadsheet provided by the Direction of Software Corner, Somak Mukherjee
 
Financial Calculation Spreadsheet
You know what a chore it is to optimize a chemical process and get to the bottom line.  Then you make some changes and have to do it all over again.  Here a great spreadsheet that should ease you pain substantially!
 
Water Properties Program
Download this small helper program so that you have the properties of water at your fingertips.  The link above is a direct link to the executable file.  This program was graciously donated the Resource Page by Pablo Coronel at pcorone@unity.ncsu.edu
 
Physical Properties DataBank AddIn for Excel
This Excel AddIn contains a moderate databank of chemicals and a nice array of physical properties.  It also contains Excel functions that can be pasted into worksheets (be sure you have one open first).  You'll find the AddIn under the Tools menu.
 
Units Conversions
These handy little programs are just about everywhere.  There a good and bad side to this one.  The bad side is that is runs in DOS, the good side is that it shows many different conversions at once.
 
The Reactor Lab
A fantastic program designed to help students gain a better understanding of reactor simulations…and best of all….it's free!
 
Insulation Calculation Programs
Two programs included to help you with insulation calculations.  The "Economic Thickness Calculator" will recommend the appropriate insulation thickness based on energy savings.  The "Insulated Pipe Temperature Prediction Spreadsheet" will help you predict the temperature inside a pipe and linear heat loss.
 
Vapor Pressure of Binary Liquid Mixtures
Use this spreadsheet to find the vapor pressure of binary liquid mixtures.   Based on fugacity corrected values from Antoines Law, this spreadsheet give accurate results with minimal inputs.
 
Physical Property Data Spreadsheet
This spreadsheet for Excel 97 contains data such as boiling and freezing points, critical data, density, vapor and liquid heat capacities, liquid viscosity, vapor pressures, and more for 468 chemicals.
 
Cooling Tower Calculator
This handy little DOS program will calculate the tower characteristic or cold water temperature for a given cooling tower with just a few inputs.  (See Cooling Tower article here at the "Resource Page")
 
Pipe Size Optimization for Carbon and Stainless Steel Pipes
This simple spreadsheet will calculate the most economical pipe diameter for a system based on flowrate, fluid density, and fluid viscosity.  The sheet is to be used for turbulent flow in carbon or stainless steel pipes.  It is designed to run on Excel 97 or higher and utilizes the Solver function so it must be installed as well.
 
Validating Binary VLE Data
Check the thermodynamic consistency of your binary VLE data with this easy to follow analysis.  Complete with spreadsheet to save you time!
 
Costing Distillation Columns
Enter some basic data and this EXCEL ADD-IN will do the rest.  Check out the specifications of the program.

Source:http://www.cheresources.com/software.shtml

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Heat Transfer and Fluid Flow Design and Analysis Software

SINDA/FLUINT is a comprehensive finite-difference, lumped parameter (circuit or network analogy) tool for heat transfer design analysis and fluid flow analysis in complex systems. It is used at over 500 sites in the aerospace, electronics, petrochemical, biomedical, and automotive industries, and in over 25 countries.

For years, SINDA/FLUINT has provided users with the most proven heat transfer and fluid flow design and analysis software in the aerospace industry. SINDA/FLUINT is a comprehensive, generalized tool for simulating complex thermal/fluid systems such as those found in the electronics, automotive, petrochemical, turbomachine, and aerospace industries. The program has proven itself repeatedly for several decades.

SINDA/FLUINT saves time and money by making the design process faster and easier, letting you gain a better understanding of your complex system. You control what is important and how to get the answer to your design performance questions using the most efficient approach. Furthermore, the code is completely extensible. You choose the features you want, decide what levels of accuracy and approximation are appropriate, and what outputs are needed. You can even add your own customizations as needed to handle your unique design task or to automate repetitive tasks.

Features

Read More
Get FREE evaluation versions here

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November 18, 2007

Uconeer v2.4

Uconeer Main Screen Image

 

 

 

This free units conversion program is designed specifically for engineers. It includes a wide range of technical categories required by engineers, but it excludes the archaic and esoteric units that clutter the menus of the other conversion programs.
If you need to convert from hogsheads to tablespoons then Uconeer is NOT for you, but if you are tired of searching for the barrels amongst the bottles, buckets and bushels then read on ….
  • In addition to the standard categories Uconeer includes engineering categories like Diffusivity, Enthalpy, Entropy, Fouling Factor, Heat Capacity, Heat Transfer Coefficient, Moment of Inertia, Stress, Surface Tension, Thermal Conductivity, Valve Sizing Coefficient, Friction Factor, Torque and Viscosity.  There are a total of 397 units in 46 categories.
  • Includes only the practical units in each category, making them quick and easy to select.
  • Convert between density and specific volume.
  • Convert decimal lengths directly to and from lengths in feet, inches and fractional inches.
  • Convert between dynamic and kinematic viscosity.
  • Convert between Brinell, Knoop, EQUOtip ™, Rockwell, Shore Scleroscope, Tensile Strength and Vickers hardness scales for steels.
  • Convert between volumetric and mass flowrate for liquids or gases.
  • Calculate Universal Gas Constant "R" in any combination of units, which can be based on Energy or Pressure x Volume.
  • Flexible formatting of output, including engineering notation.
  • Full support for clipboard, with clipboard contents always shown on screen.
  • Online calculator during data entry.
  • "Recently-used" list ensures that the categories which you use regularly are available with a single click.
  • Small download size - only 0.5 Mb
  • Full install and uninstall utilities included.
 

Download
Uconeer can be downloaded either as an executable installation program, or as a ZIP file containing the installation program and a ReadMe file. Both versions result in the identical installed package.
If you want to be able to simply click on the downloaded file to install Uconeer then download the executable install file. If you do not know how to handle ZIP files then you should use this option. The executable download file is 533 kb. Download executable.
If you prefer to work with ZIP files then download zip file here. The zipped download file is 508 kb.
If you have problems downloading either of these files you can also download the ZIP version from Simtel. They have mirror sites all around the world. When you click on the Simtel link you will see a list of all the states and countries that have Simtel mirrors. Simply select the nearest mirror to you to start downloading.

Source:http://katmarsoftware.com/uconeer.htm

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January 18, 2008

How to plumb a small half bath

If you want to boost your popularity rating with your spouse and kids, put in an extra bathroom. It’ll eliminate those morning lineups, keep the kids and their friends from tromping through the living room with muddy feet, and please older folks because they won’t have to climb the stairs.

 

 

This project ranks so high on homeowner surveys that builders now put extra bathrooms in new homes as standard equipment. But if you own an older home, you can probably use another.

In this article we’ll show you how to plumb a “half bath,” so called because it has a sink and a toilet but no shower or tub. It’s small enough so you can usually squeeze it into your current floor plan. See “How to Find Space,” p. 32.

This article is an updated and completely rewritten version of a popular plumbing feature we ran in Sept. ’93.


Click Image to enlarge.

Building an entirely new bathroom is a big project involving carpentry, plumbing, electrical, drywall and usually ceramic tiling skills. In this article, we’ll focus on the most difficult part: the plumbing. Plan to spend three or four days on the plumbing and about two weeks for the entire bath. Remember to apply for a permit to make sure your work is inspected and approved. On p. 42, we list detailed TFH articles on tiling, drywall, setting a toilet, and electrical wiring.

Step 1: Measure and sketch your proposed drain route; shorter is better

Plumbers claim that you can plumb a bathroom no matter where you put it. But the farther you locate the bathroom from your home’s main waste line, the more problems you’ll encounter. The main waste line is a 3- or 4-in. dia. pipe called a “soil stack” when it runs vertically inside the house, and a “building drain” when it runs horizontally underground. On the main floor, it’ll be enclosed inside finished walls, but you can usually locate it by looking in the attic or basement or on top of the roof, where it exits to open air. You’ll have to attach at minimum a 3-in. dia. waste line from your new toilet to this main waste line. The shorter the run, the better, so you don’t have to break into as many walls, floors and ceilings. In extreme cases, you may have to box in a portion of a ceiling for a drainpipe. The main drain lines can be more difficult to find in a slab-built house because they run under the concrete. If you can’t locate them, call in a licensed plumber to help with this crucial part of the planning.

TIP:

The closer you locate the bathroom to your home’s main waste line, the fewer problems you’ll encounter.

How to find space

Remember the old-time half bath that was so cramped you had to sit on the toilet sideways? No longer. Most building codes now have minimum space requirements for toilets: 30 in. in width and 24 in. of open space to the front. Fig. A shows the approximate minimum room size needed to fit standard sinks and toilets. However, you can shrink the room more if you choose smaller fixtures. To find them, check the catalogs at a full-service plumbing store or a home center, or consult a bathroom designer.

Designers look to closets, pantries and portions of bedrooms as the most likely places where they can “steal” space. However, you don’t want the door opening to kitchens, dining rooms or main living areas. Basements are ideal locations too.

You might have to shift a wall or two to get the right dimensions. “Bearing walls,&rdqu