Re-Tensioning an Abandoned Anvil B 268 Spring Hanger?
Re-Tensioning an Abandoned Anvil B 268 Spring Hanger?
(OP)
I've been handling pipe systems for a while, but this problem has not come up before.
A previous outage removed some 18 inch pipes and their pipe strap hangers. One old spring hanger (Anvil-Grinnel Fig B-268, Size 11, Type A) was left in place, but it was unloaded completely when its original pipe clamp was removed.
The hanger had a pre-load of 1839 lbs. With no pre-load at all right now - of course - the spring is "topped out" to the top of the can.
We have been tasked to replace the original piping and re-use this spring hanger.
What special precautions or warnings are required to do this? Seems it is a matter of supporting the new pipe with a separate chainfall and straps. Clamping the old hanger's rod and pulling the spring down (towards the loaded position) with a chainfall on the temporary clamp until the spring is back at the 1839 lbs position, then re-insert an equivalent pair of new pre-load stops.
Once the new stops are re-inserted, then the old pipe hanger can be fitted out and tightened up as usual for a new spring hanger.
A previous outage removed some 18 inch pipes and their pipe strap hangers. One old spring hanger (Anvil-Grinnel Fig B-268, Size 11, Type A) was left in place, but it was unloaded completely when its original pipe clamp was removed.
The hanger had a pre-load of 1839 lbs. With no pre-load at all right now - of course - the spring is "topped out" to the top of the can.
We have been tasked to replace the original piping and re-use this spring hanger.
What special precautions or warnings are required to do this? Seems it is a matter of supporting the new pipe with a separate chainfall and straps. Clamping the old hanger's rod and pulling the spring down (towards the loaded position) with a chainfall on the temporary clamp until the spring is back at the 1839 lbs position, then re-insert an equivalent pair of new pre-load stops.
Once the new stops are re-inserted, then the old pipe hanger can be fitted out and tightened up as usual for a new spring hanger.





RE: Re-Tensioning an Abandoned Anvil B 268 Spring Hanger?
Check w/ mfg or find old manual