When referring to constants, the j dimension refers to the diameter ofthe rod which transfers our load from the constant to the support component.(i.e. clamp, clevis, etc.)
Constant Drawing with J Dimension Shown
The strength of the hanger rod is dependent upon its diameter. The smallest standard rod diameter for Piping Technology is .5 inch with a load capacity of 1,350 lb. and the largest with a 3 inch diameter and a load capacity of 60,100 lb.
When installing clevises, first you should disengage the pin connection of the clevis. Then align the clevis pin holes with the existing component. Place the pin through the holes of the clevis an component and place the lock in the pin.
Clevis and Pin Connected to a Rod
When determining the required length of a u-bolt, one should provide a leg length which extends from the centerline of the pipe to end of the threaded portion, while still permitting a hexnut/locknut combination with full thread engagement.
For saddle supports that do not require welding, the installation process would involve locating the saddle support in the correct position, utilizing the adjustable component (usually a threaded member) to accommodate height requirements and finally ensuring that the saddle component is completely in contact with the outer pipe wall.
Saddle Supports with Stainless Steel Slide Plates
Use this 10-point operational integrity check list when inspecting spring supportsin the field:
- Beam attachment
- Beam attachment pin
- Spring hanger attachment
- Load flange movement
- Spring coil corrosion
- Check load indication for hot load
- Note load deviations
- Threaded rod/weldless eye, hex nuts
- Pipe clamp attachment pin
Corroded Variable Spring Support