Sunday, January 11, 2015

Liquid Process Piping - Engineering Design Manual (Must Have)

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1. The purpose of this manual is to provide information for the design of liquid process piping.

2. Applicability. This manual applies to all HQUSACE elements and all USACE Commands having responsibility for the design of unit processes for treatment of liquids.

3. Distribution Restriction. Approved for public release; distribution is unlimited.

4. References. References are provided in Appendix A.

5. Scope. This manual is to be used in the selection of piping systems and materials for chemical and physical unit processes. Process piping systems include pipe and appurtenances used to transport fluids. Separate guidance has been provided for plumbing, potable water, sewage, storm drainage, fuel and lubricant systems.

Monday, January 5, 2015

How to Draw a P&ID (Piping and Instrumentation Diagram) - Separators

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This P&ID (Piping and Instrumentation) Tutorial was done for the Queen's University Chemical Engineering, CHEE 470, Design of Manufacturing Processes, 4th year capstone design course.

Two and three phase separators along with two heat exchangers were drawn.

Note the video is slightly out of focus to due a screw up by the instructor who forgot to focus the camera.


[PPT] Basics of Pipe Rack and Rack Piping

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A pipe rack is the main artery of a process unit. It connects all equipment with lines that cannot run through adjacent areas. Because it is located in the middle of the most plants, the pipe rack must be erected first, before it becomes obstructed by rows of equipment. Pipe racks carry process, utility piping and also include instrument and electrical cable trays as well as equipment mounted over all of these.

Contents of the PPT:


Piping Design Info XLS (40+ Sheets)

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Piping Design Info XLS is an excel file which almost contains all sizes of various fittings and structure sizes. This came out handy at many calculations which we requires from time to time while doing piping. Here are the contents of the excel file:

  • 150# RF PIPING DIMENSIONS
  • 300# RF PIPING DIMENSIONS
  • 600# RF PIPING DIMENSIONS
  • 900# RF PIPING DIMENSIONS
  • 1500# RF PIPING DIMENSIONS
  • 900# RTJ PIPING DIMENSIONS
  • 1500# RTJ PIPING DIMENSIONS

Thursday, January 1, 2015

Basic Design for Piping: Isometric Drawings

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Criteria of Piping Material Application

A spool is a short piece of pipe with flanges on both ends. The word “spool” is derived from the fact that his configuration actually looks similar to the common wood spool upon which sewing thread is wound.


A spool drawing, however, is more complicated than the simple illustration above, since it involves many such “spools” on one sheet of paper. The spool drawing is an isometric drawing rather than an orthographic drawing. It is three-dimensional in that it shows both horizontal and vertical planes. The term “spool” is no longer being used as the name for these drawings. The proper term is “piping isometric”. Slang forms have shortened it to “isometric” or “isos”.




The purpose in making the piping isometric of a piping configuration is threefold:

1. It is used by the Fabricator in fabricating the line.

2. It is used by the Piping Material Group in purchasing the material for the line.

3. It is used by the field crew in erecting the line.

Monday, December 29, 2014

[EXCEL] How to Design Entrainment Separation Vessels / Gravity Deacanter

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A Knockout drum with a mist eliminator is common whenever a process requires entrained droplets to be separated from a vapor stream. A simple knockout drum (no mist eliminator) will remove droplets larger than about 380 microns by gravity settling M. generally gravity settling removes more than 90% of the liquid entering the vessel .However the remaining droplets smaller than 380 microns can be a significant problem for a downstream unit. A mist eliminator in the top of the knockout drum will remove the remaining droplets down to a diameter of 6 microns or less, depending on the type of mist eliminator. A knockout drum with mist eliminator can achieve an overall efficiency of 99.99% liquid removal.

Knockout Drum Configurations

Knockout drums may be oriented vertically or horizontally. In both types, the mist eliminator may also be oriented vertically or horizontally. For a vertical mist eliminator (horizontal vapor flow), the drainage flow is cross-current, whereas for vertical upflow the drainage flow is counter-current. Because cross-current flow results in less liquid holdup, a vertical mist eliminator can be operated at a higher vapor loading without reentrainment (depending on the liquid load and on the height).

A horizontal entrainment separation vessel can also be designed to operate as a droplet coalesce. In this case, the mist eliminator operates beyond the reentrainment load. Large, coalesced droplets blow off the down stream side of the mist eliminator and either settle by gravity or are collected by a vane type mist eliminator.

Monday, December 22, 2014

[EXCEL FILE] Heavy Oil Programs Worksheet (51 Sheets)

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Heavy Oil Programs Worksheet (51 Sheets)

Program Description

0 Conversion Factors

1 API - Determines oil API, density and molecular weight at any temperature

2 Water Properties: Density and thermal properties of water

3 Thermal Properties: Heat capacity, thermal conductivity and diffusivity of fluid saturated rocks/and liquids

4 Viscosity of Liquid Mixtures & Emulsions

Tuesday, December 16, 2014

An Introduction to Block Flow Diagram (BFD)

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A Block Flow Diagram - BFD, is a schematic illustration of the major process.The block or rectangles used represent a unit operation. The blocks are connected by straight lines which represent the process flow streams which flow between the units. These process flow streams may be mixtures of liquids, gases and solids flowing in pipes or ducts, or solids.


Thursday, December 11, 2014

An introduction to Pipe & Tube Classification

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Pipe classification:

Iron pipe size (approximate internal dia.)

Manufacturers’ weight: NPS +

  • STD
  • XS
  • XXS


Monday, November 24, 2014

General Guidelines for Ladders and Platforms

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Types of Ladders

1)    Step Through
2)    Side Step
3)    Straight/vertical Ladder
4)    Inclined

General Guidelines
·        Platforms are provided for access to manholes, instruments, valves and equipment, and for crossovers between ladders.

 

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