PT&P custom-designed big ton spring supports with stainless steel rollers for a chemical plant in Brazil. The frame is fabricated from carbon steel and the shim plates are 2205 duplex stainless steel. The design specified that these big tons are placed in a large “oil pan” that was fabricated from AR400 steel. AR400 steel is abrasion resistant and has a minimum hardness of 360 on the Brinell scale and a nominal hardness of 400. The stainless steel rollers are designed to fit inside the “oil pan” and the big tons are placed on top of the rollers. Oil is then placed inside the pan providing continuous lubrication for the assembly while accommodating the axial or lateral movement of the structure. These big ton spring assemblies include special coils and neoprene drip shields to protect the coils and oil in the pan from debris. The big tons are 26-1/2″ x 33″ x 26-1/2″ with a movement of 0.499″ down and a spring rate of 13,450 lb./in. They are designed for an operating load up to 78,318 lb. and underwent load testing prior to shipment. PT&P, along with our team of engineers and designers, specializes in making the impossible, possible. Over the years, there are many instances where our clients have come to us with unique and unusual applications requiring a product not yet developed or requiring the modification of an existing product.

Live New Webinar
Sign-up for a Live Technical Webinar…
Compact Spring Support Webinar
Date: Thursday, June 15, 2023 - 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
The Compact Spring Support Presentation was presented by DST and covered key objectives, background and leading industry problems related to process equipment nozzels (both rotating and non-rotating equipment). It reviewed the challenges involved in design and analysis of piping with respect to process equipment nozzles. This presentation also discussed the types of chronic problems and failures related to process equipment nozzles and present (or introduce) the Compact Spring Support as a solution. During the presentation, the DST team explained why chronic problems with process equipment exist, describing current design practices as they relate to industry code standards and how the Compact Spring Support addresses these problems directly and effectively. It also took a quick look at DST technical data and sizing program.
Upcoming Webinars:
June 8th: U.S. Bellows 101 - The Basics of Expansion Joints 10:00 am
June 22nd: Constant Spring Supports Design and Application Webinar 10:00 am OR 2:00 pm
June 29th: Pipe Support Field Inspection, Installation and Maintenance 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