The Welding Greek Institute (WGI) offers the new learning program “Hot Taps for in Service Pipeline Connections Course” that highlight the added value that Hot Tapping and Plugging practices can offer to support engineers and technicians, who work in pipelines installation and maintenance.


Essentially, hot tapping is an alternative procedure that makes a new pipeline connection while the pipeline remains in service, glowing natural gas under pressure. This procedure involves attaching a branch connection and valve in the outside of an operating pipeline, and then cutting out the pipe-line wall within the branch and removing the wall section through the valve. Hot tapping avoids product loss, methane emissions and disruption of service to customers.


Hot tapping is usually performed when it is not feasible, or it is impractical, to take the equipment, Pipeline or Piping out of service, or to purge or clean it by conventional methods. This procedure is not a new practice, but recent innovations in design and technology mean that there is now more effective than before. Therefore, the payback period for utilizing such methods is often immediate.


Hot tapping is also referred as line tapping, pressure tapping, pressure cutting and side cutting. The process involves attaching branch connections and cutting holes into the operating pipeline without interruption of gas flow and with no release or loss of product. Hot taps permit new tie-ins to existing systems, the insertion of devices into the flow stream, permanent or temporary bypasses, and are the preparatory stage for line plugging with inflatable temporary balloon plugs (stoppels).


This training program covers a wide range of topics and gives candidates a good overall awareness of safely use the equipment and apply the modern techniques in successful hot tapping and plugging a pipeline. Consequently, by choosing this short course you could gain a competitive advantage in the marketplace, that would help you to find a job with better opportunities.


Swiss Approval International guarantees an accredited certification, giving the attenders the appropriate passport for the international market, ensuring with accuracy and independence the principles and rules that refer to hot tapping.


At the end of the training program, participants will acquire basic knowledge and skills regarding the following major issues:

  • Understand the key economic and environmental benefits of employing hot tapping procedures instead of shutdown connections
  • Understand the importance of proper selection of hot tapping and plugging equipment
  • Awareness of the specific safety precautions
  • Gain solid knowledge about all aspects pertaining Hot tapping
  • Gain knowledge on Safety assessments and Hazard identification for Hot tapping
  • Better grasp of the feasibility of Hot tapping process
  • Awareness of welding sequences of Hot tap Fittings into Live Piping, Pipeline and equipment
  • Better daily work performance as a result of deeper understanding of the technologies and operation principles of hot tapping and plugging systems
  • Achieve the required level of technical knowledge and skills that will be used effectively in relevant professional duties


Especially, this training program is suitable for the following stakeholders:

  • Pipelines Project Managers
  • Mechanical Maintenance Engineers
  • Professionals in Pipelines Installations and Maintenance
  • Engineers who are planning for hot tapping and plugging process
  • Technicians involved in Pipelines Construction, Maintenance and Inspection
  • Welding and Pipeline Professionals
  • Safety Engineers and Professionals
  • Inspection Engineers
  • Fresh Graduated Engineers who want to be updated with specialized engineering applications
  • Hands-on personnel


The final exams are closed-book. Everything covered in class, the lecture slides, the required readings, the assignments, or additional handouts may be tested. Additional details on the exam will be provided prior to the exam date. Successful attendees will also receive a Swiss Approval Training Certificate of Attendance.


  • Cost of Practical training – Theoretical training – Examinations – Student Material to be delivered:

Course Syllabus

Module 1: Welding Processes/ Discontinuities and Defects

  • Arc welding processes | Private
  • Consumable designations | Private
  • Crack types and discontinuities vs defects | Private

Module 2: Burn through and Related Safety Concerns

  • Factors affecting burn through | Private
  • Effect of wall thickness | Private
  • Effect of welding parameters | Private
  • Effect of flow rate/pressure | Private
  • Avoiding burn through | Private
  • Related concerns | Private

Module 3: Defect Assessment Prior to Repair

  • Reason for assessment | Private
  • Types of pipeline defects | Private
  • Pressure reduction requirements | Private
  • Corrosion measurement methods | Private
  • Corrosion assessment methods | Private
  • Assessment of grinding defects | Private

Module 4: Full-Encirclement Repair Sleeves

  • Full-encirclement sleeve types | Private
  • Principal of operation | Private
  • Assuring effective reinforcement | Private
  • Sleeve design | Private
  • Sleeve fabrication | Private
  • Other sleeve types | Private

Module 5: Hot Tap Branch Connections

  • Branch connection design | Private
  • Reinforcement types | Private
  • Integrally-reinforced | Private
  • Line replacement/stopping | Private
  • Pressure testing | Private
  • Hot tapping through welds | Private

Module 6: Pipeline Repair by Weld Deposition

  • Physical concept | Private
  • History of weld deposition repair | Private
  • Burn through risk | Private
  • Integrity restoration | Private
  • Practical application | Private
  • External repair of internal wall loss | Private
  • Regulatory activities | Private

Module 7: Non-Welded Repairs and Commercial Repair Products

  • Repair by grinding | Private
  • Bolt-on repair clamps | Private
  • Fiber-reinforced composite repairs | Private
  • Epoxy-filled shells | Private
  • Grouted tees | Private
  • Steel sleeves vs composite repairs | Private

Module 8: Selecting an Appropriate Repair Method

  • Pipeline repair manual | Private
  • Detailed selection criteria | Private
  • Repair option summary | Private
  • Qualifying factors | Private

Module 9: Standards - Safety

  • Standards, Requirements and national rules | Private
  • Reported incidents | Private
  • Safety while welding equipment in service | Private

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