Subsea Hot Tap and
Line Stop

The offshore and subsea environment is part of our DNA at ION PRO Services, with extensive experience working in the offshore subsea environment.

Offshore & Subsea Hot Tap & Line Stopping Capabilities

Our subsea capable equipment successfully performs hot tapping and plugging for pressurized pipeline repair, maintenance, and modification.


Up to 5,000 psi


up to 200°F

Line Stop Size

up to 48” in diameter

Our Recent Subsea Hot Tap & Line Stop Projects

What to expect during every project?

  • Perfect safety record
  • Zero pipeline interruption even in extreme environments
  • Simplified data sheets
  • Easy scheduling
  • Fast quoting process

We’re ready to work.

Photo Apr 28, 09 27 50
Oil pipeline in industrial district with factories at dusk
in_service_welding_ionpro1 (1)
previous arrow
next arrow

Choose ION PRO Services for your next Offshore & Subsea Project

At ION PRO Services, our focus is to keep critical pipeline infrastructure online.

Our subsea hot tap and line stopping teams are ready to provide:

  • Effective systems for subsea operations
  • In-house hose reels and support equipment
  • In-house subject matter experts
  • Offshore trained personnel
  • BOSIET qualified technicians

We stay abreast of advanced and developing technologies in our field of work. Rest assured; you are in safe hands with ION PRO.

How Are Subsea Hot Tap & Line Stops Performed?

Our subsea hot tap and line stop set up and execution procedures are specialized to work on under-pressure systems up to 5,000 psi.

Hot Tap Process


We are responsive to your requests and value your questions. ION PRO Services has proudly served clients seeking turnkey hot tap and line stop services as qualified experts with precision and excellence, with extensive experience in the industry.

How is the pipeline pressure contained when a hot tap is performed?

The connections between the pipeline / fitting / valve / hot tap adaptor / hot tap machine are all pressure rated connections capable of containing the pipeline pressure. Also, each individual component has been designed to contain pipeline pressure. When the pipe wall is breached by the pilot bit the pipeline pressure fills the cavity inside the fitting, valve, hot tap adaptor and lower part of the hot tap machine but is contained in this space. After the tap has been completed the coupon is retrieved past the valve and valve is closed. This allows for the removal of the adaptor and hot tap machine without loss of pipeline pressure.

Why is it important to know the flow rate of a pipeline when performing a hot tap?

When a hot tap is performed a saddle shaped coupon is cut out of the pipe wall. This coupon is held to the pilot bit by u-wires.

When the coupon has been fully cut free of the pipe it will slide along the pilot bit and into the pipe where it is in the product flow.

A high product flow rate can cause the coupon to spin and risk it becoming free of the pilot bit and fall into the pipeline. Typically, the maximum flow rate in a gas line is 30 fps and in a liquid line it is 15 fps.

Why are pig bars used on a flow through plug?

Pig bars, or pig guide bars, are used to essentially block a pig from diverting or getting stuck into a hot tap branch.

When the pipeline flow into the branch is great enough, a pig can be drawn into the branch without pig guide bars.

Another risk is that even without any flow exiting a pipeline into the branch, a hard body pig or a smart pig can get caught on the perimeter of the branch penetration in the pipeline if pig guide bars are not present.

Why are leak tests performed on the makeup of the hot tap machine in the field?

This test, performed at a pressure equal to the line pressure plus 10%, ensures that the hot tap machine, adaptor, valve, fitting, and the fitting to pipeline connection will all be able to hold the pipeline pressure with the pipe wall is breached by the pilot bit.

What is the benefit of using a 3-way tee?

Using a 3-way tee allows the pipeline valve to be installed above grade where it can be more easily and conveniently inspected and serviced.

Contact Us

21233 FM 529,
Cypress, Texas, USA, 77433-5139

phone number
+1 (832) 674-4096