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Big Ton Springs used in a Chemical Processing Plant

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Slide Plates

Photo Title: Big Ton Springs used in a Chemical Processing Plant

Keywords:
slide plates

Description:
The limiting constraint in designing and fabricating these big ton spring supports was to maintain an overall height less than 15.75 inches and still allow the load table to travel downward during operation. Whereas a standard PT&P size 2-190 variable springs would have been sufficient to hold the load specified, the coil alone was taller than the space available at site. For this reason, a big ton design was implemented which utilized six smaller coils working in parallel to produce the required load-carrying capability and spring rate. All of the framehousing components were made from carbon steel and supplied with an HDG finish. The travel stop rods were made of A-193 Gr. B7 material and were painted red. The slide plates sitting atop the load flange were made of polished A-304 stainless steel. Both big ton assemblies are 30 inches wide by 30 inches deep by 15.75 inches tall. Overall spring rate is 3,600 lbin. and each weighed approximately 1,460 pounds. The installed cold load = 14,800 lbs. and the operating hot load = 16,075 lbs. Movement from cold to hot = 0.354 down. Tested in the load cell to insure proper operation throughout the entire working range of the coils, the big tons were then set to the cold installed load as specified.

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Piping Technology & Products

Photo Title: Big Ton Springs used in a Chemical Processing Plant