March 21, 2016
Tag: Spring Support
What if the Temperature used for designing the spring support has changed in the operation, is there a way to change the spring hanger without getting a new one?
May 16, 2014
A temperature change would mean a change in movement, which may or may not need a new spring hanger. If the travel does not take the spring out of its operating range, then you would not have to change anything. However, if it does, then the spring will need to be replaced.
How does putting two spring in series reduce the spring rate?
Putting two springs in a series makes a longer spring and reduces the spring rate by a function of how much longer the overall coil is made, whereas putting them in parallel does not change the spring rate but increases the load capacity.
Is it possible that the rod/spring coming down from the spring support can be welded directly to the pipe in order to support it?
May 9, 2014
It is possible but not recommended. You would lose the flexibility of being able to adjust the spring support height or load capacity.
What is the function of a spring?
The function of a spring is to absorb movement in the pipe caused by thermal and load displacements.
How do I set (load) a spring support?
November 2, 2010
In order to set (load) a spring support, you must ensure that the pipe system is at its cold (installed) state. (All hydro-testing has been completed.) At this point, with variable springs, the lower travel stops should be removed. Adjust the load at the load column of the spring so that a load slightly above the cold load is reached. The remaining travel stops can now be removed. Note: Excessive force should not be required to remove the travel stops at this time.
What are the sizes of spring supports?
For variable springs there are 23 sizes with loads ranging from 50 lb. through 50,000 lb. For constant springs, there are 110 sizes with travel ranging from 1″ to 14″ and loads ranging from 0 lb. to 90,000 lb.
F-Type Variable Spring Supports
PTP-8 Type C Variable Spring Assemblies
Figure 100 C-Type Constant Springs
PTP 100-C Size 84 Constant
How do I remove a spring support?
In order to remove a spring support, first you must ensure that the spring is at its designed cold (installed) position. Next, re-install the travel stop(s) in the support. Then, provide adequate temporary support for the piping system. Once you have adequate support, you can release the load from the spring. Finally, remove the spring support from the piping system.
Variable Spring Support with Travel Stops in Place
What are spring supports used for?
Spring supports are used to accommodate vertical movement in pipe systems during their thermal deflection cycles.
Variable Springs
What is a variable spring support?
A variable spring support is a pipe support that uses a spring coil (or series of coils) to accommodate pipe movement from the initial (installed) condition to the final (operating) condition of the piping system. For all variable spring supports there must be a difference in load and that load difference will be based upon the spring rate of the coil(s) specified.
Variable Spring Supports
Live New Webinar
Sign-up for a Live Technical Webinar…
Variable Spring Support Design, Size Selection, Installation & Maintenance Webinar
Date: Thursday, March 30, 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
This Webinar will focus on the different types of variable spring supports and big ton variable spring supports. Learn about the special features available, in addition to the design of a variable support. View how the different coil configurations produce a unique response to an applied load and see how a spring assembly is loaded. Discover the basic steps in selecting a hanger design and the step-by-step process used to size a spring for your application. Learn about the different attachments, testing, and installation and maintenance procedures. View examples of failed supports provided by our Field Service Division and learn why they failed and how to prevent it. Gain knowledge of the valuable tips used when deciding to replace or re-calibrate a variable spring support, as well as adjustments, shutdown, and isolation procedures.
Upcoming Webinars:
April 6th: Compact Spring Support Webinar 10:00 am OR 2:00 pm
April 13th: Fabric Expansion Joints Webinar by U.S. Bellows, Inc. 10:00 am
April 20th: Constant Spring Supports Design and Application 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