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HIGH PRESSURE PIGGING 40 000PSI

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HIGH PRESSURE PIGGING 40 000PSI

Objective/Outline Scope:
The objective of the present intelligent pigging program includes cleaning, electronic gauging (EGP) and In-line inspection (Corrosion detection using MFL technique) without disturbing process parameters) is to assess the heath of pipeline in quantifiable terms and to get the base data.

TECHNICAL SPECIFICATIONS OF HIGH DENSITY POLY PIGS

  • Pig shall be made out of open cell polyurethane foam of uniform density 8-10 LBS/CU FT and coated with polyurethane ester synthetic rubber coating. The material for foam Pig shall confirm the standard ASTM 02240/ DIN 53505/ BS903. The PIG shall withstand temperature range from 0 Deg to 80 Deg. C and upto 90 Deg C for short duration.
  • Pig shall maneuver itself through 3D bends.
  • Pig shall be suitable for heavy wiping of internal surface of minimum 100 KM continuous run.
  • Pig shall be able to successfully pass through up to 50% reduction in pipeline – internal diameter.
  • O.D of the poly pig & quantity shall be as per tendered Scope of work.
  • Each pig shall be equipped with a pulling hook on front portion of the pig body. The hook may be
    made of nylon rope.

TECHNICAL SPECIFICATIONS OF BI-DIRECTIONAL (BI-DI) GAUGE PIG

Each Bi-Di Gauge pig shall essentially consist of four polyurethane sealing disc and two support/guide discs, mounted on a carbon steel body. Each disc shall be separated by suitable polyurethane spacers. Each pig shall be suitable for specific nominal diameter pipelines to be cleaned.

Physical properties of polyurethane for sealing discs and supporting discs shall be as per ASTM 02240/ DIN 53505/BS903/ DIN53504/ DIN.53516. The PIG shall withstand temperature range from 0 Deg to 80 Deg.C and upto 90 Deg C for short duration.

DEGREE OF CLEANLINESS

The degree of cleanliness of pipeline segment will be based on the following criteria: • Maximum amount of debris coming out of the line shall be less than 24 Kg per 24 Km length of Pipeline Section. Magnets onto the magnet pig shall have collected less ferrous debris than the magnet can hold. If the those above criteria are not sufficient then it required to run extra cleaning pig at no extra cost to GAIL to achieve the cleanliness of Pipeline segment to obtained interpretable data by CDP run as per provisions of the Scope of Work.

APPLICATIONS:

Pipeline pre-commissioning, Pipeline maintenance, Boiler maintenance, Line dewatering, Line drying

Pigging launcher & receiver Sample of poly pigs Pigged pipe clearing scale