What does 'flogging the bolt' mean?
What does 'flogging the bolt' mean?
(OP)
Hi,
Some of the older guys might be able to tell me what does it mean when someone say, 'flogging the bolt' is not permitted? Seriously.
Some of the older guys might be able to tell me what does it mean when someone say, 'flogging the bolt' is not permitted? Seriously.





RE: What does 'flogging the bolt' mean?
RE: What does 'flogging the bolt' mean?
I am reading a company standard on flange bolt up proceedure and torque values when I came across this unique term that I have never heard of. I gogled and have not find any definitions for it. This must be a very old term used by the older guys.
RE: What does 'flogging the bolt' mean?
RE: What does 'flogging the bolt' mean?
RE: What does 'flogging the bolt' mean?
You might be right because this term is used in a section where it talks about tightening methods - convential spanners/wrenches. It said, "the flogging of bolts in hydrocarbon system is not permitted."
So it might mean, like you said, the action of swinging a sledge hammer to apply impact load onto a spanner wrench to develop torque.
RE: What does 'flogging the bolt' mean?
http://www.valvecare.com/FlangeHire.htm
Ted
RE: What does 'flogging the bolt' mean?
TTFN
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RE: What does 'flogging the bolt' mean?
Thanks guys.
RE: What does 'flogging the bolt' mean?
maybe too close to the edge there (must resist nut joke)
RE: What does 'flogging the bolt' mean?
You are pretty close in the reference to the naval practice of keel hauling as the term "flogging" seems to have originated in Great Britain. I believe the original term was "flogging spanner".
I got into deep trouble when I substituted a Swench for a ring spanner (hammer wrench) to remove turbine housing nuts. The hammer wrenches were supposed to be used with extensions. We were not to use hammer (flogging) wrenches on said nuts under any circumstances.
http://www.powerhawk.com/pages/SWENCH/1000.html
RE: What does 'flogging the bolt' mean?
rmw
RE: What does 'flogging the bolt' mean?
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: What does 'flogging the bolt' mean?
Captain Bligh, "Flog that man".
Mr.Christian. "But he is dead Captain".
Captain Bligh, "Then flog his belongings".
Offshore Engineering&Design
RE: What does 'flogging the bolt' mean?
I was just curious what references or negative experience others might have that would form the basis of a prohibition for at least a gradual workmanlike application of this bolting discipline in a specification (I realize of course this practice obviously creates more shock to the bolting etc. steel, but I have personally not witnessed any "pop") .
RE: What does 'flogging the bolt' mean?
I worked on many slow speed marine 2-stroke Diesel engines (100rpm) in the days before hydraulic torqueing equipment was available.
The bolts could be up to 6"dia and were flogged up by sledgehammer (flogging hammer). The practise was to pop punch the bolt and nut postions before dis-assembly and then flog up to the same or thereabouts position when assembling.
I ended up with a physique like a weight-lifter along with my sailors roll. We loved it and there was always a queue to get the flogging hammer.
Offshore Engineering&Design
RE: What does 'flogging the bolt' mean?
RE: What does 'flogging the bolt' mean?
Slugging has long been quite common in the natural gas pipeline field used to make up tight flange joints. There are now high torque pneumatic wrench drives that make slugging unnecessary.
Slugging can be a problem when used on bolts because the impact of the hammer will tend to shear off the bolt head or, even worse, create a flaw at the shoulder of the bolt such that the bolt will fail in service. For this reason, flange connections in the gas industry are always made using high strength studs and high strength nuts. Never bolts.
RE: What does 'flogging the bolt' mean?
RE: What does 'flogging the bolt' mean?
Really, it is nice to see a light hearted discussion on this site for a change.