PT&P custom-designed U-type constant spring supports for an oil refinery in Texas. Constants can be utilized in refineries within blocks such as hydrogenation units, naphtha desulfurization units, and fluid catalytic crackers. The spring’s frame is manufactured from A36 carbon steel and hot-dipped galvanized to protect against corrosion. For instances where there was axial and lateral movement, 240 Gr. 304 slide plates were installed on the load flanges of the constants. The constants supplied are designed for an operating load ranging from 1,085 lb. up to 17,480 lb. and horizontal travel from 2.5” to 6”. The overall dimensions range in size from 17” H x 20” W x 31” L to 28” H x 26” W x 66” L. Load and travel tests per industry standards were performed prior to shipment.

Live New Webinar
Sign-up for a Live Technical Webinar…
Shock Control, Restraint & Support Devices Webinar
Date: Thursday, May 1, 2025 - Register for 10:00 am OR 2:00 pm
*Note: Time Zone is CDT * Central Daylight Savings Time / GMT -5h
Live Webinars are 1 PE/PDH Credit for TX Professional Engineers
Explore the various applications of snubbers, sway braces, and sway struts in piping systems and equipment. Learn how these products help prevent pipe system failure due to seismic loads, flow transients, wind loads, safety valve thrust loads, or pipe rupture. Discover the various tests performed within PT&P’s facility to ensure product quality, including cycle testing, travel testing, and load testing. Finally, view the value-added services offered by PT&P and rest assure that your shock control, restraint, and support device needs can be covered by our 24×7 web-based emergency services, field services, and quick turnaround time when you need it most.
Upcoming Webinars:
April 24th: U.S. Bellows 101 - The Basics of Expansion Joints 10:00 am OR 2:00 pm
May 8th: U.S. Bellows - Expansion Joints In-depth Webinar 10:00 am OR 2:00 pm
May 15th: Pipe Support Engineering & Design Webinar 10:00 am OR 2:00 pm

Online Course
Piping Design and Analysis Influence on Pipe Support Selection and Design
Surveying a piping system? Need to change a current system?
This course is also great for…
• New Engineers, Management and Operations
• Field, Process, Maintenance and New Engineers
• Piping and Piping System Designers and/or Instructors
*This online course is approved for 8 hrs. P.E. Credits