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      Pipeline Pigs

      • Articulated Pigs
      • Bi-Directional Pigs or Bidi Pigs
      • Cup Pigs and Conical Cup Pigs
      • Desalination pigs and handling equipment
      • Dual or Multi Diameter Pigs
      • Flexicast Pigs
      • Foam Pigs
      • Gel Pigs and Speciality Pigging Solutions for Unpiggable Pipelines
      • Magnetic Pipeline Pigs
      • Spheres
      • Studded or Pin-Wheel Pigs

      Isolation Tools

      • Abandonment Plugs
      • Dual Tool Isolation (also known as Twin Tyred Posi Plugs)
      • Heat Exchanger Tube Plug Systems
      • High Pressure Test Plugs
      • Hyperbaric Spheres and Piggable Plugs for Subsea Tie-ins on Pipelines
      • Internal Weld Testers and Flange Weld Testers
      • Low and Medium Pressure Plugs
      • Valve Removal Tools
      • Welding Pig – Piggable Plug

      Pig Tracking & Signalling

      • Pig Signallers
      • CD 42 Topsides Pig Tracking
      • CD42-STS Subsea Pig Tracking
      • CD52 Topsides Non-Intrusive Pig Signallers
      • CD 52 Subsea Non-Intrusive Pig Signallers
      • CD Electro-Magnetic and Acoustic Transmitters for Pig Location
      • Pig Location and Tracking TRAXALL GPS

      Pig Handling & Loading

      • Automatic Pig Launcher
      • Launchers and Receivers
      • Pig Handling Equipment
      • Portable Pig Launchers
      • Sphere Release Fingers
      • Wet Buckle Pig Insertion Tools

      Pigging Ancillaries

      • Pig Diverters
      • Sphere Flow and Barred Tees
      • Valve Leak Detection System
  • Services
      • Custom Pig Design
      • Heat Exchanger Tube Plug Systems
      • Ice Pigging
      • Pipeline Cleaning
      • Pipeline Decommissioning
      • Pipeline Inspection
      • Pipeline Maintenance
      • Pipeline Testing
      • Speciality Pigging Solutions for Unpiggable Pipelines
      • Training
  • Hire/Rental
    • KC Widget Content

      Pipeline Pigs

      • Gel Pigs and Speciality Pigging Solutions for Unpiggable Pipelines
      • Leak Detection Pigs

      Pig Tracking & Signalling

      • Pig Signallers
      • CD 42 Topsides Pig Tracking
      • CD42-STS Subsea Pig Tracking
      • CD52 Topsides Non-Intrusive Pig Signallers
      • CD 52 Subsea Non-Intrusive Pig Signallers
      • CD Electro-Magnetic and Acoustic Transmitters for Pig Location
      • Pig Location and Tracking TRAXALL GPS

      Isolation Tools

      • Dual Tool Isolation (also known as Twin Tyred Posi Plugs)
      • Heat Exchanger Tube Plug Systems
      • High Pressure Test Plugs
      • Internal Weld Testers and Flange Weld Testers
      • Low and Medium Pressure Plugs
      • Valve Removal Tools
      • Welding Pig – Piggable Plug

      Pig Handling & Loading

      • Automatic Pig Launcher
      • Launchers and Receivers
      • Pig Handling Equipment
      • Portable Pig Launchers
      • Wet Buckle Pig Insertion Tools

      Pigging Ancillaries

      • Pigging Services Ancillary Equipment
  • Solutions
Call +44 (0)1748 813270
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Call +44 (0)1748 813270
  • 28″ Black Powder Pigs
  • 36” Secondary Pipeline Isolation Solution
  • 36” & 48” Welding Pig / Piggable Plug
  • 36” Condensate and Black Powder Removal Pigs
  • 42” & 20” Pig Diverters
  • 90″ Foam Pigs, Pig Launcher & Loading Tool
  • API 10K Intrusive Pig Signallers
  • Bespoke Pig Design Solution
  • Bespoke Pig Pole / Pusher
  • Bespoke Pipeline Isolation Solution
  • Contingency Pig Loading Tool
  • Hazardous Waste Decommissioning Pigs
  • Inflatable Sphere Comparison
  • Long Run Dual Diameter Foam Pigs
  • Long Run Pipeline Pigs and Foams
  • Online Replacement of Leaking Valve
  • Pig Trials Dunlop Double Carcass Floating Hoses
  • Pigging of Slurry Pipeline
  • Site Operations: 36” NB Pipeline Cleaning
  • Site Pigging Services & Equipment
  • Piggable Temporary Isolation Systems
  • Pipeline Isolation & Valve Removal Tool Under Pressure
  • West Burton ‘B’ Power Station
  • Site Operations: Pull-through Pig
  • Abandonment Project Compression Plugs
  • 24” Test Plug / Dewatering Tool

Case Study: Pig Trials on Dunlop 24" Saflote Double Carcass Floating Hoses


Introduction

The offshore industry has been using the method of pigging for cleaning the walls of rigid pipelines for many years. Pigs come in a variety of designs and offer a number of solutions in the pipeline industry. The pigs are generally the same diameter or larger than the internal diameter of the pipe. When placed in a pipeline the pig is fired down cleaning any deposits off the pipe wall.

 

Client Requirements

The question has been asked at Dunlop Oil and Marine as to the suitability of pigging offshore hoses and to recommend a suitable method for removing waxy build up deposited on the lining of a hose after product transfer. The biggest concern when considering pigging offshore hoses has always been the rubber lining construction and, unlike rigid pipelines, the flexibility of the hose. Dunlop were given the task of developing a safe method for cleaning hose bores that would not damage the lining of the hose so rendering it useless for further service as stated by Oil Companies International Marine Forum latest edition 1991 (O.C.I.M.F.).

 

Project Execution

A project was developed to run a number of trials at Dunlop’s Grimsby site to prove that pigs can travel down flexible hoses without causing damage to the rubber lining and to find a suitable pig capable of removing the waxy build up deposited on the lining of the hose. The trial was run in conjunction with iNPIPE PRODUCTS™, manufacturer of pigs. For the purpose of the trials Conoco kindly gave permission for the use of three of their 24” Dunlop Saflote double carcass hoses.

The trial consisted of three pig varieties, ‘Soft Foam’, ‘Long Run Standard Duty Criss Cross’ and ‘Star Wheel’ pigs, all supplied by iNPIPE PRODUCTS™. A short string was constructed using the three Conoco hoses to simulate the use of the pigs on used linings and to see if the deposit on the hose lining could be removed. To run the trial the pigs required only 0.7 bar to traverse along the string but required a high volume of water to seal the pig against the pipe wall. A pump capable of delivering over 76 litres per second at 0.7 bar was used to propel the pigs through the string and calculated to take around three and a half minutes to complete a run.

The Foam and Long run pigs proved successful at negotiating the hose string and upon inspection had not damaged the lining of the hoses, but they only managed to remove light surface dirt and not the hard waxy deposits seen on the lining.

The Star Wheel pig trial consisted of the string being initially placed in a straight line and the pig was then forced down the hose string 10 times. With the hoses bent through 180°, the pig was pushed through the string a further 10 times. The attached picture illustrates the hose string being bent to 180° and the ‘Star Wheel pig’ exiting the string during the trials.

After the completion of the trials the hose linings were inspected and found to be clean and free from damage and the Star Wheel pig had successfully removed a significant amount of waxy deposit from the lining of the hose.

Summary

The conclusion of the full scale trials carried out in conjunction with iNPIPE PRODUCTS™ has confirmed the suitability of three pig types, ‘Soft Foam’, ‘Long Run Standard Duty Criss Cross’ and ‘Star Wheel’ for cleaning the bores of offshore hoses manufactured by Dunlop Oil and Marine Ltd. The Star Wheel pig trialled by Dunlop proved itself more than capable of removing hard wax deposits from hose linings.

 

iNPIPE PRODUCTS™ is an internationally recognised leader in the design and manufacture of pipeline pigging products, including foam pigs, cup pigs, bi-directional cleaning / gauging pigs, pig handling equipment, pig signalers, engineered solutions for pipeline isolation and joint testing, launching & receiving systems as well as bespoke pigging solutions based on specific client project requirements.

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Pigging Poles / Pusher Bespoke Design

Bespoke design to assist clients with pig handling, insertion into launcher or receiver and loading or removal of pipeline pig.

iNPIPE PRODUCTS™ supplies a range of standard and bespoke pigging poles/pusher which are designed, manufactured and tested to conform with specific client project requirements.

iNPIPE PRODUCTS™ was approached by one of Europe’s top oil and gas operators to look at a bespoke pig pusher for a 36” pig, as their existing pig pusher was not performing as required for their project.
Read full case study: http://www.inpipeproducts.com/case-studies/pig-pole-pusher/

Pigging Poles / Pusher Standard Design

Standard design to assist clients with pig handling, pig insertion into launcher or receiver and loading or removal of pipeline pigs

• Manufactured from durable, high strength aluminum for a tool that works as hard as you do
• Limited flexibility of our Pigging Poles ensures hitting the target every time
• Drilled with exacting tolerances for a precision fit
• Indexed parts allow the operator to know hook orientation for a trouble-free catch each time
• Long term field tested and approved
• Patented tool and components
• Easily stores in pickup bed
• Modular components allow for multiple attachments and special orders
• Non-spark producing aluminum construction makes a safer tool
• Aluminum hook, cast with special alloys for strength and long life
• Aluminum hook will not cause sparking, which is critical in a natural gas environment
• This is the only aluminum hook in the industry
• Aluminum Ram (also non-sparking) for seating pigs without damaging poles or pigs
• The most durable and safest tool to use in a natural gas environment
• Multiple lengths available for different barrel lengths

Sphere Lifter Standard Design

Standard design to assist with the handling of pipeline pigging spheres in an easy and efficient manner

Sphere handling lifter comprising hand operated vacuum pump, 1.5 metres of hose and cup complete with lifting shackle

Sphere inflation kit

Sphere handling cassette