Plant Services, Inc

Plant Services, Inc


Mechanical Flow REstraint Services

Hot Taps

Hot taps

Tying a new line to an existing one isn’t easy, but PSI makes it look that way.

  • One of the largest hot tapping and line stopping inventories
    in the Western region
  • Hot taps from 1/2” up to 42”
  • Able to handle taps up to 700 degrees and pressures up to 1480 psi

mechanical line stops

When you need to isolate a piece of equipment, let PSI get to work. We can perform precision line stops on both single and double low to medium-pressure lines so you can get to work fast.

Our equipment includes multiple Shortstopp® 60, Shortstopp II, Shortstopp 275 and Shortstopp 50 units to ensure we have what you need when you need it.

PSI also stocks a vast assortment of adapter housing and spool pieces, allowing us to bolt almost any flange up to 42”.
If you need to bolt up using 150#, 300# or even 600# rated equipment, we can take care of you.

Hot Tap Fittings

PSI also stocks a vast assortment of adapter housing and spool pieces, allowing us to bolt almost any flange up to 42”.
If you need to bolt up using 150#, 300# or even 600# rated equipment, we can take care of you.

hot tap fittings

PSI not only performs hot tap and line stop services but also sells hot tap and line stop fittings.

Type I and Type II hot tap fittings are available through PSI, each engineered and fabricated to give additional reinforcement to pipe sections to ensure their reliability and integrity. A variety of full encirclement and partial encirclement products are also available depending on the level of needed support and use.

All standard hot tap fittings are engineered to meet the requirements of ASME B31.3 and B31.4/8. Hot tap fittings are typically A234 Grade WPB or WPC with A105 flanges.

PSI can engineer other materials to meet pipeline material Requirements or customer requirements. PSI’s hot tap fittings are compatible with major models of hot tapping equipment and are compliant with most pipeline design codes.

Typical flanges are ASME Class 150, 300, or 600. We also custom-engineer other classes or flange types for our customers.

line stop fittings

If you need full port size-on branch connections, PSI offers connections for standard line stop operations in stock. If you have custom requirements, we will engineer and supply reduced branch sizes where needed.

In addition to the standard line stop fittings, PSI supplies fittings with guide bar plugs for utilization when future line pigging is anticipated.

Line Stop

Line Freezes

Plant Services, Inc. knows that one solution doesn’t fit every problem. That’s why we offer line freezing services in addition to our mechanical line stops. Our skilled team uses cryogenic technology to isolate sections of pipe and allow for the repair or replacement of sections downstream without interrupting other sections.

Flow restraint services available through PSI also include:

  • Line Stop Fittings
  • Hot Tap Fittings
  • Cross-Line Stops
Tom Thayer Picture

Tom Thayer


Thank you for coming to our website. It is my hope that when you put your mouse down and decide to take action for your facility needs, that we’ve given you enough information for you to make PSI your first call for your specialty contracting needs.

I formed PSI to provide a better, more polished product for our customers in the power and petrochemical industries. To provide “old school” service that was based upon a handshake, and where a service company does just that, provide service. Not only provide service, but provide only the best service, with spot-on pricing, punctuality, professionalism and utilizes a “service with a smile” approach. The company, much like myself has modest roots, remains humble in its demeanor and yet is very driven to succeed and be the very best at what we do.

Mike Bosse

Mike Bosse

Lead Technician

Mike has been with PSI since Late 2014, when he moved over to Billings, MT from Chicago to join our work family.

Mike has been working in the petrochemical industry since he was 19 and has developed quite a few specialty skills over the years. Mike’s certified in multiple PSI service lines such as Isolation/Hydros and torqueing and on-stream leak sealing.

“Bosse” as we refer to him, is another part of our very talented and exciting MT crews. Committed, caring and very personable, Mike is a favorite of our customers and is usually asked for by name when they call in for service work. We enjoy seeing Mike’s bright, smiling face every day around here. He just brings joy to everything he does and is a superb member of our Plant Services, Inc. family.

Sean Carney

Sean Carney

National Technical Operations Manager

Sean has over 13 years of specialty contracting experience and has been with PSI for over 10+ years. Sean started in this industry at a very young age, so despite barely being in his 30’s, Sean has collected decades of experience and has earned his right to manage all of PSI’s territory offices. Sean is a life-long Montana native and grew up in the farm fields just outside of Billings right near the PSI corporate office.

Sean has obtained training and certification in just about every service line PSI has to offer. From Leak Sealing to Hot Taps and Line Stops, Sean’s mastery of these services lines is the baseline that provides him the knowledge to lead our offices to provide only the pinnacle of services to our valued customers.

Sean has the unique background in that he apprenticed at PSI while he was in high school. Seeing things literally from the ground up, as well as working his way up with hard work, dedication and a zest for specialty contracting, Sean’s vision for the future of PSI sets us all up for success. Customer service is core to Sean’s beliefs, and he is our cheerleader to our troops that quality customer service is not easy but is worth it every time and is the only service acceptable here at PSI. Give Sean a call and see what he can do for your specialty needs.