Hot Tapping & Line Stopping


EPCM’s world-class hot tapping and line stopping services for pipelines and pressurized systems enable modification and remedial work without interrupting material flow. Hot tapping can be applied to a broad spectrum of materials, including carbon steel, cement, and PVC – on land or underwater. Whether carrying crude oil, gasoline, water, natural gas, or sewage, commodity flow and pressure remain unchanged, no matter how extensive modifications or repairs are.

With our vast industry experience, engineering excellence and state-of-the-art equipment, we pride ourselves on providing safe and efficient services for pressurized system repair, reconstruction or replacement, regardless of size or complexity. EPCM’s services in this sector include:

  • Hot tapping
  • Line stopping
  • Pressurized pipeline welding and installation works
  • Pipeline insulation
  • Cathodic protection

Before commencing a hot tap, the EPCM team writes out job-specific plans in generous detail, including a host of specifications which are intimately related to the procedure, at a minimum these include:

  • Connection Location and Design (including gaskets, valves, and bolts)
  • Thickness and Materials of the Vessel, Piping, or Pipeline to be tapped
  • Detailed, Written Welding Procedures
  • Health, Safety, Fire Protection, Emergency Response, Procedures and Instructions
  • Owner and User Requirements
  • Emergency Shut Off Procedures
  • Contingency Seal Off and Isolation Plans (that maintain integrity for the system’s life)

Line stopping is usually required when multiple hot taps are involved. Somewhat more involved than a hot tap, this operation uses the multiple hot taps, line stop actuators, plugging heads, and a bypass line. Line stopping performs the temporary function of a valve, to isolate and neutralize a section of the pipe system, while allowing the commodity to freely flow through the bypass structure, into the rest of the pipe system.

By performing effective line stopping services, EPCM helps our clients:

  • Avoid Interruptions to Service
  • Avoid Shutdowns and Associated Costs
  • Prevent Emissions
  • Prevent Loss of Product
  • Provide Engineered Modifications
  • Provide Increased Safety
  • Provide Maintenance
  • Reduce Operating Costs

As a skilled and experienced engineering firm, we always begin with the end in mind, including considerations for the anticipated remedial work. Complex systems such as those found in multi-product pipelines may require the addition of maintenance facilities, such as launching and receiving stations for pigging, pipe repair, complete replacement of pipeline sections, or any other modifications, including but not limited to:

  • Valve Fitting
  • Valve Replacement
  • Decommissioning
  • Leak Testing for Recommissioning
  • Cold Cutting
  • Pipe Welding and Weld Repairs
  • Consulting Services
  • Non-destructive Testing
  • Risk Assessment
  • Whole Site Procedures
  • Redundant Line Sealing
  • Relocations
  • Retrofits
  • Establishment of Routine Maintenance