2. WHY PIG? Government Regulations Decrease Corrosion Increase Efficiency/
Decrease Corrosion
Increase Efficiency
Decrease Power Costs
Pre-Inspection Cleaning
Operational Pigging
Gauging Line Geometry

3. INFORMATION TO KNOW BEFORE PIGGING YOUR LINE
Pipe Dimensions
Line Size
Line ID
Pigs 1-5 % Larger Than Pipe ID
2% Optimal
Line Length
Selection Of Pig Material
Pipe Material
Internal Coatings
Wall Thickness
Line Pipe Grade May Determines Thickness
Selection of Pig Material ID OD

4. INFORMATION TO KNOW BEFORE PIGGING YOUR LINE
Valve Types
Single Biggest Cause Of Problems

5. INFORMATION TO KNOW BEFORE PIGGING YOUR LINE
Bends
1.5 D, 3D, 5D or Greater
Miter Bends

6. INFORMATION TO KNOW BEFORE PIGGING YOUR LINE
Branched Fittings
Wyes
Tees (Barred or not)
Tees > 50% of main diameter should be barred
At Least Three Diameters Of Straight Pipe Between Any Two Fittings

7. FLOW RATE Flow Rate Most Effective If Ran At Constant Speed
Pig Velocity > 4ft/sec But <15ft/sec
In General, the faster the pig travels the less efficient it becomes in being able to carry material in front of it
Application
Speed (MPH)
New Construction
1-5
On-Stream Gas
2-8
On-Stream Liquids
1-8
ILI Tools
2-7

8. FLOW RATE
Pigs Are Driven Through The Line By Applying Pressure In The Direction Of Required Movement. A Pressure Differential Is Created Across The Pig, Resulting In Movement In The Direction Of The Pressure Drop.
Once The Force Behind The Pig Becomes Greater Than The Opposing Frictional Force, The Pig Will Move In The Direction Of The Applied Force (Pressure).
Break Out Point : When A Pig Begins To Move
Greater Than Pressure Required To Maintain Movement

9. LAUNCHING & RECEIVING

10. LAUNCHING & RECEIVING

11. Pigging Mediums Liquid Gas
Incompressible Liquids Provide Maximum Control Over Pig Speed As Well As Lubricating Seals
Ensure Seal Material Is Compatible With Propelling Liquid
Gas
As Gasses Are Compressible, The Amount Of Stored Energy Behind A Pig Propelled With Gas Is Far Greater Than That Of A Similar Pig Propelled With Liquid
Increased Wear On Sealing Discs

12. TYPES OF PIGS

13. Pig Uses Batching Gauging Cleaning Barrier Between Dissimilar Fluids
Soft Metal Plate
90%-95% ID
Confirms Integrity Of The Flow Area
Cleaning

14. Pig Uses Magnetic Gel ILI Lift Ferrous Debris or Trip Pig Signals
Mapping, Geometry Measurement, Metal Loss

15. CATAGORIES OF PIGS Foam Negotiate Short Radius Bends Various Densities
2-5 LB , 5-8 LB, 8-10 LB
Reduce In Diameter Up To 35%
Numerous Options
Uses
Drying
Wiping
Cleaning
Proving

16. CATAGORIES OF PIGS Solid Cast Urethane Uses
Hollow Shaft Can Handle 20% Reduction In Pipe ID
Can Maneuver In Less Than 1.5D Radius Bends
Advantages: Non Brittle, Elastomeric Memory, Abrasion Resistant
Disadvantages: Break Down In Higher Temps, Dissolves In Certain Chemicals
Uses
Sealing
Batching
Cleaning

17. CATAGORIES OF PIGS Solid Cast Urethane Durometer
Types Of Polyurethanes
Castable Elastomers: Prepolymer And A Curator
MDI (Methylenebisdiphenyl)
More Expensive But More Durable
TDI (Tolylenediisocyanate)
Better Compression And Holds Up In Higher Temperature
Durometer
Measured By Shore Durometer or Rockwell Test
The Higher The Durometer The Harder The Urethane And The Better The Scraping Capability. The Softer The Durometer The Better The Sealing Capability.
MDI : 70A-85A Range
TDI : 50A-90A Range

18. CATAGORIES OF PIGS Steel Mandrel Pig Most Aggressive Pigs
Most Versitile
Discs
Sealing: < 1 Inch (High Sealing Low Scraping)
Scraping: >1Inch (High Scraping Low Sealing)
Slotted: Multi-Diameter Lines
Cups
Scraper: Maximum Scraping - Reduce 15-20% Of Diameter
Conical: Maximum Sealing – Reduce 30-35% Of Diameter
Brushes
Mounted To Ensure Full 360° Wall Coverage
Size Of Bristle Has An Effect On The Size Of Anomaly It Can Clean

19. Brushes
Flat Wire: Remove dirt, scale and large debris. Doesn’t clean pits well.
Round Wire Brush: Ideal for pits. Easily handle thickness changes and 1.5D bends.
Pencil Brush: Best for rust and loose debris. Rigid and doesn’t handle tight bends well.
Wire Wheel Brush: Used for smaller diameters and not aggressive.
Scrub Brush: Total wire foam pig. Good for finishing and polishing.

20. SOLUBLE PIGS Uses Options Advantages Proving Length Size Shape
Water Soluble
Oil Soluble
Advantages
Cannot Get Stuck
No Cut Outs

21. PIGGING SPHERES USES OPTIONS Advantages Liquid Removal Coatings
Brushes
Advantages
Automated Launching

22. PIG SIZING Pig Lengths Bullet Shaped Double Dish & Light Density Swab
2 Times Nominal Diameter
Sealing Length: 1.5 Times Nominal Diameter
Double Dish & Light Density Swab
1.5 Times Nominal Diameter
Solid Cast
Approximately 1.5 Times Nominal Diameter
Steel Mandrel
3” Longer Than Nominal Diameter (Small Pigs)
6” Longer Than Nominal Diameter (Larger Pigs)

23. WHAT IS CLEAN? There Is No Industry Cleanliness Standard
Remove Contaminates A Layer At A Time
Combination Of Pigs And Cleaning Solution

24. Dual Diameter Pigging Not to be confused with Multi-Diameter Solutions
Butterfly or Petal Discs
Paddle Pig
Wheel or Spring Suspension
Tend to see higher wear in the smaller diameter line

25. Cleaning With Solvents
Ran in conjunction with pigs to aid in cleaning the line.
Designed to breakdown, suspend solids, and reduce surface tension to enhance cleaning programs
Solvents are designed for:
Penetrating solids
Suspending large volumes of solids in fluid columns
Getting deep into pits
Coat solids to keep them from sticking to each other
Solids come out in a slurry

26. PRE-RUN INSPECTION Pig must be in good condition
Measure the sealing surface to ensure it is oversized
Inspect the sealing surface for defects
Unrestrained diameter of the brushes must be measured to ensure contact with the pipe
Also inspect brushes for corrosion or breakage so they don’t fall apart in the line or damage fittings
Documentation of these practices pre and post run can help maximize pig usage and decrease costly mistakes

28. PROGRESSIVE PIGGING Run Bare Foam Pig To Determine True Pipe Opening
Continue To Run Bare Foam Pigs Until They Come Out Clean
Run A Foam Criss Cross Coated Pig Just Larger Than The True Pipe Opening
Run A Bare Foam Pig Behind It To Improve Seal and Continue Criss Cross Pigs Travel
Continue This Set Up Until A Criss Cross Pig Comes Out Re-Usable
Increase Pig Size ( ¼ ” to ½”) Until Full ID Attained
Run Two Full Size Pigs (Criss Cross or Wire Brush)
Run A Swab Pig Behind It To Clear The Line
Flush Line
*Ideal Pig Speed Feet A Minute

29. PIGGING APPLICATIONS Sand Buildup Method 1 Method 2 Method 3
Run a large amount of light density swabs
Used when increased pigging volumes are not available
It is very time consuming and not strong enough to push through the entire line
Propelling medium may deposit more sand than pig removes
Method 2
Using foam or steel pigs with bypass jets
The bypass jets allow the propelling medium to bypass the pig creating turbulent flow keeping the sand suspended
The bypass jets reduce the pig's speed by as much as 30%.
If adequate volume is not available to propel a pig with bypass jets this method should not be used
This method should not be used is where extreme deposits of 30% or more of sand exist
Method 3
Foam pigs and extreme high-volume propelling medium
The pigs diameter is equal to the internal pipe diameter, less the largest amount of deposited sand per a cross-sectional view.
For example, if we were pigging a 24" pipeline with a buildup of sand of 8", we would subtract 8" from 24" and use a 16" foam pig
The large volume propelling medium is going to bypass the pig causing turbulence to agitate the sand and keep it in suspension
Increase pig diameter until nominal internal diameter of pipe is reached

30. PIGGING APPLICATIONS Butterfly Valves
Butterfly valves cannot be pigged. It is not recommended to attempt pigging through a butterfly valve. If one is willing to attempt to pig a butterfly valve, they must accept full responsibility for any problems.  
*It is highly recommended to seek the aid of someone experienced with this type of special application pigging and to use a pressure recorder with 0 to150 psi and one-hour rotation capability. This should be mounted on the launching end of the line.

31. PIGGING APPLICATIONS Drying Pipelines
This first run will remove anywhere from 85% to 95% of the water in the line.
Most use criss-cross foam pigs because of flexibility, easy handling and low cost
Run a series of swabs to remove any moisture from the air in the line.
From this point further the propellant should be dry.
Brush foam pigs and swabs are now used to begin cleaning and removing the rust and millscale.
These pigs are run at speeds of 7 to 10 feet per second and in alternating groups: first, three brush pigs, and then ten swabs.
If receiving dust dry pigs, the pipeline is considered at 00 dew point.
For negative dew points, pigging is continued.
The last stage of pigging involves running a medium-density bare pig for a final wipe down and sweep of the line.

32. PIGGING PROBLEMS Over Cleaning When To Stop Pigging
Pigging To Bare Metal Invites Oxidation
A Few Mils of Build Up Prevents Oxidation And Minimally Affects Flow
When To Stop Pigging
Monitor pressure drops when readings essentially level out.
Time pig runs, if the volume is consistent pigging should stop when cleaning time has leveled out.
When the number of seconds of receiving effluent is the same during subsequent pig runs, pigging should be stopped.
Wirebrush pig runs should be limited to two or three.
By running swabs nearing the end of pigging operation, they will both sweep the line of loose buildup as well as gauge the line’s cleanliness. When a swab is retrieved in good condition, pigging should stop.

33. STUCK PIGS

34. STUCK PIGS

35. STUCK PIGS

36. STUCK PIGS

37. STUCK PIGS

38. STUCK PIGS

39. STUCK PIGS

40. STUCK PIGS

41. STUCK PIGS

42. STUCK PIGS

43. STUCK PIGS

44. STUCK PIGS

45. STUCK PIGS

46. STUCK PIGS

47. STUCK PIGS

48. WHAT IS PIG TRACKING
Pig Tracking refers to monitoring the passage of a pig as it moves past prescribed and monitored points along the pipeline.
Pig Locating refers to pinpointing a pig that has become stuck or lost in a given pipeline or pipe manifold system on land or at sea.

49. TYPES OF TRACKERS
Unfortunately, carbon steel pipe acts as an ideal electromagnetic shield, which limits the possible methods of transmitting a signal through the pipe wall to a sensor. The common methods used to sense the passage of a pig or attempt to locate it are:
Mechanical:
have several drawbacks.
invasive into the line, which makes them a potential environmental and safety hazard.
subject to contamination by materials in the pipe, which can prevent them from operating correctly.
subject to mechanical wear and damage, which will prevent them from operating properly.
Intrusive Pig Signals
Radioactive:
two main drawbacks.
the radioactive nature of the transmitting device itself makes people extremely skittish in regards to using it.
the transmitting distance is very limited which makes it primarily usable only when the “outside-the-pipe” sensor is directly attached to the pipe.
Acoustic:
systems generate an audible signal, which can be picked up by external sensors, but only when there is sufficient acoustic coupling between the transmitter and the wall of the pipe.
This usually limits their use to lines filled with liquid, and as you might expect lines which do not operate in a high noise environment such as sub-sea lines.
Geophones
Magnetic:
Magnet equipped pigs operate well for tracking.
They are not of any use in locating a stuck pig as it is practically impossible to locate them when they are not in motion.
Non Intrusive Pig Signals
Electromagnetic:
Utilize an electromagnetic transmitter, which is attached to, embedded in, or travels with the pipeline pig, and a receiver/wand that will pick up the signal from those transmitters at a distance allowing for significant ground cover.
This signal is a low frequency signal that operates in the magnetic range of the electromagnetic spectrum, which allows the signal to penetrate the steel pipe wall to transmit a given distance through the ground.

50. PINPOINTING A STUCK PIG
Pinpointing the location of the transmitter located in a stuck pig is a relatively simple operation.
Move to the last leapfrogging location where you know the pig passed. At this point hold the wand horizontally and begin to slowly walk the line listening for the steady pulsing beep of the transmitter.
Please note that you must be sure where the pipe is when you are attempting to walk the line.
Lateral distance from the center of the pipe will greatly decrease the possibility of picking up the signal.
Upon picking up the signal, continue walking towards the transmitter while watching the analog sweep meter.
When the meter movement begins to decrease, move backward until you see the approximate maximum signal strength.
Turn the wand vertical over the pipe.
Slowly move the wand over the approximate area of maximum signal strength.
The signal strength will increase and then fall to zero as well as the audible signal will disappear (in other words “NULL”) and then start to rise again.
Move the wand back and forth until you center over the “NULL”.
You should now be standing directly over the transmitter.

51. REMOVING STUCK PIGS Type 1: Options:
Loss Of Seal →Propelling Medium Bypassing Pig
Excessive Wear On A long Pig Run
Dual Diameter Line
Abrasive Line Conditions
Torn Pig Due To Partially Closed Valves Or Debris
Options:
Increase Pigging Volume
Amount Not Bypassing May Be Enough To Propel The Pig
Remove Pressure & Volume
Wait 15 Min For Pig To Regain Shape
Run A Line-Size Swab
2LB Density Pig Will Try To Bypass Stuck Pig & Reseal 1st Pig
Reverse Flow Direction
Send Pig Back A Few Feet Then Send The Original Direction (Bidirectional Only)
Cut Out

52. REMOVING STUCK PIGS Type 2: Obstructed Options:
Excessive Debris Build-Up
Partially Closed Valves
Tools, Animals, Etc.
Options:
Increase Pigging Pressure
Increased Force To Push The Obstruction
Increase / Decrease Pigging Pressure
Quick On-&-Off Fashion (Kick In The Rear)
Works Well In Small ID Fittings, Tight Bend Ells & Valves
Remove Pressure & Volume
Wait 15 Min For Pig To Regain Shape
Reverse Flow Direction
Send Pig Back A Few Feet Then Send The Original Direction (Bidirectional Only)
Cut Out

53. Any Questions Or Comments?
Any Further Information Or Assistance Can Be Provided.
Just Contact Us By Or Phone.
The Pigging Guide CD-ROM Has Pigs Available As Well As Technical Information.
Anything Not Seen In The Catalog Can Be Made