Repair of Pipeline Defects by Hot Tapping Technique

Repair of pipeline defects By Hot Tapping Technique

Hot Tapping Making a hole on pipeline for the  purpose of jointing a section with an operating pipe line at operating pressure without shut down of operating line.

Where Hot Tapping is required ? 1. Replacement of a section. 2. Rerouting of line 3. Take off a new line from existing line. 4. Hook up a line with another line

 Advantages of Hot tapping 1. Avoid thruput loss. 2. Saving of money. 3. Avoid retrieval & transportation of bulk quantity of product. 4. Safe operation, no spillage of product 5. Environmental friendly. 6. Fast operation.

Hot tapping flash presentation link

Safety measures in Pipeline maintenance 

Recommendations ◦

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EIC / Site engineer to ensure trench is prepared as per tender specification and site requirement.  Adherence to safety guidelines shall be certified by Site Engineer / EIC and supervisor by generation of checklist type format. Display boards to be displayed showing trenching design and danger of working in trench. PPEs to be worn by all the labours. This to be ensisted by Site Engineer / EIC Provision of shuttering for trench more than 2.0 m  All works to start with TOOL BOX TALK Surprise checks to be carried out by Senior executives

S.No. 01. 02. 03. 04. 06. 07. 08. 09. 10 11. 12.

orma renc ng ormat or c ec s ur ng trenc works

Activity Status Clearance given by EIC to start excavation at the site Tool Box Talk given to all Contractor labour and supervisor  Lift tools to be used at site viz., crane, sling are tested and testing certificate(s) checked and available at site The Crane operator is holding valid driving licence and more than 21 years of age (10.9.1.3 GCC) Register of wage-cum-Muster Roll for the workmen opened at site Proof regarding qualification of the supervisor checked. Workmen’s Compensation Insurance Safety helmet provided to all worker for safety of personnel working First Aid Box with medicines placed at site Drinking water available Trench beyon d 1.5 meter up to 3.0 meter (6.1.5 OISD-GDN-192) Safe angle of repose 45 degree and 0.5 meter width and every 1.5 meter depth Beyond 3.0 meter  Required shuttering and scaffolding provided

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Barricade at 1 M height (with red and white band, self glowing caution board) for excavation beyond 1.5 meter (6.1.10 OISD-GDN-192) Arrangement for entry into and exit from the trench. Trench more than 4’ to have one ladder for more than 100’. Ladder shall be extended from the bottom of the trench to at least3’3” above the surface of the ground.( 10.5.2.0 GCC) Excavation (10.5.2.0 GCC) Excavated material shall not be placed within 5’ of the edge of the trench or half of

Mainline emergency Equipment Equipment required for Mainline emergencies : Generators, Compressors, Welding machine, Dewatering pump, Pneumatic pump, Cold cutting machine, Fire extinguishers etc are kept at stations/ base stations. These are mobilised to the repair site on requirement basis during any emergency. In case of non availability, the equipment are to be taken on hire basis.

a n enance o system

equ pmen

 All

the equipment should be run trouble free during maintenance of any mainline work.

 Trial

run should be taken for all equipment for 15 minutes on monthly basis and monitor the condition of each equipment and details should be noted.

  Any

defect noticed during trial run should be rectified immediately with proper maintenance

 The

record of the trial run, defects observed and maintenance carried out if any should be maintained as per the format.

Discussion session

Thank you