About On-Site Stress Relieving Services, LP.

About On-Site Stress Relieving Services, LP.

On-Site Stress Relieving Services, LP. (OSR) is a specialty industrial heat treating company offering portable on-site services. Our services extend, but are not restricted to:

  • new construction and turnaround work in oil and gas processing facilities
  • refinery and petrochemical units
  • power generating plants
  • fabricating shops
  • off shore equipment


OSR LP specializes in On-site Post Weld Heat Treating (PWHT) of pressure vessels, welded structures, field fabrications and piping using portable electrical heating and combustion heat treating equipment. Services are provided for both new construction and turnaround projects.

The company was incorporated in 2003, and has grown rapidly in a highly competitive industry by providing “Best in Class” services to its clients. OSR has become the most progressive and rapidly growing company in the industry. The company offers around-the-clock on-site contract services throughout the United States. The company has three offices located in Tulsa, Oklahoma, Houston, Texas and Topeka, Kansas.


Our management staff has an extensive knowledge of the heat treating industry with over 40 years of experience in on-site heat treating. OSR LP successfully differentiates itself by providing high quality workmanship by highly trained managers and technicians that are unmatched in the industry.

Customers of OSR benefit from:

  • Experienced Project Management and Planning
  • Experienced Field Supervision and Technicians
  • Courteous and on-time service
  • Well maintained and serviceable equipment
  • Reasonable and cost effective pricing
  • Management and technical support
  • An excellent safety program and safety record
  • A strong partnership with each client

For more details on our specialty services, please visit our services page.

When you contact us about an industrial heating project or problem, you can be sure to receive a quick response with straight answers, reasonable and cost effective pricing and reliable service.

Contact Us About Your Project Today