Grinnell Spring Hanger Catalogue 1

[DBreyer]

Hi all,

I have an existing line with an old Grinnell spring hanger. Due to corrosion on the can we would like to replace the spring hanger. Unfortunately the type label on the hanger is unreadable (I can only see B-268).
I tried to identify the figure number of the hanger by measuring the hanger can length an diameter and looking up the corresponding figure number from a hanger catalogue.
While browsing through different catalogues (Anvil, PSS) I found that although they advertise their hangers as Type B-268 the dimensions and even spring rates of the suppliers differ greatly.

Doe any of you have some original ITT Grinell catalogues (ideally from the 1960s or 70s) or any other idea to find the right spring hanger short of doing a piping stress analysis?

Kind regards

 

[MJCronin]

DBreyer ...

The Grinnell company became ANVIL a number of years ago ... You are talking to the same people

I have dealt with powerplant spring hanger repair and replacement in the past.

Some Questions:

------ Is this a constant or variable spring hanger ? - Have you checked for any failed/corroded spring coils ? - Can you see the coils ?

------ Has this hanger been "topping" or "bottoming" out at piping operating temperature ?

------ Are the adjacent spring hangers on the system in good repair or at the limits of their travel ? - do they have broken coils ?

------ Is this hanger on a steam piping system ? Is the piping clamp/clevis and other hardware made of alloy steel ? Are the coils coated ?

I suggest that you talk directly with the sales engineer at ANVIL and send him pictures of your hanger problem

Please post pictures of the hanger on this thread.

I also suggest that you cut the corroded can off of the hanger, inspect and count the spring coils and relay this information to ANVIL

More details and pictures of this hanger will help you ... please post them

This is an example picture of an old spring hanger with the can removed and showing failed coils:

MJCronin
Sr. Process Engineer

 

[MJCronin]

This is kind of a fun read .....

https://thielsch4syte.com/2017/05/26/piping-failures-and-the-importance-of-hanger-walkdowns/

And for those fans of exploding piping, death and dismemberment..... you simply cannot beat:

https://s3.amazonaws.com/suncam/docs/167.pdf

Any comments anyone ????

MJCronin
Sr. Process Engineer

 

[DBreyer]

MJCronin,

to answer your questions:
Some Questions:

------ Is this a constant or variable spring hanger ? - Have you checked for any failed/corroded spring coils ? - Can you see the coils ? -> variable spring, yes- yes

------ Has this hanger been "topping" or "bottoming" out at piping operating temperature ? -> No

------ Are the adjacent spring hangers on the system in good repair or at the limits of their travel ? - do they have broken coils ? ->no additional hangers here. The line I am looking at connects to a tank and this is the 1st support from the tank nozzle -> Movements are due to tank settlement and nozzle rotation.

------ Is this hanger on a steam piping system ? Is the piping clamp/clevis and other hardware made of alloy steel ? Are the coils coated ? -> No, no, no

I suggest that you talk directly with the sales engineer at ANVIL and send him pictures of your hanger problem -> will do, I was not sure which company actually took over from grinell as many comanies use the same numbering system.

Please post pictures of the hanger on this thread. -> One photo is attached.
I also suggest that you cut the corroded can off of the hanger, inspect and count the spring coils and relay this information to ANVIL

More details and pictures of this hanger will help you ... please post them

This is an example picture of an old spring hanger with the can removed and showing failed coils: Thanks for the additional information

 

[XL83NL]

Any comments anyone ????

Excellent post. Esp. the link to May's article. I have a similar document, albeit only with photos and less explanation, from Lisega, on plant walkdowns they did and what they found (typically). Im not sure if it can be shared, but such documents always hold some interesting examples to share with others.

Huub
- You never get what you expect, you only get what you inspect.