I'm curious to know what techniques people are using to evaluate the condition of non-rotating or low-rotation wire ropes for cranes/hoists?
Any success stories?
Thanks,
Charlie

Hmm..
Visual inspection comes to me, check for rust, broken wires and always check the wire clamps.
It is amazing how so many people are unaware of the Don't Put a Saddle on a Dead Horse rule.

Do you mean wire ropes on the crane/hoist or rigger wire ropes being attached to the crane/hoist hooks?

quote:

Originally posted by svanels:
Hmm..
Visual inspection comes to me, check for rust, broken wires and always check the wire clamps.
It is amazing how so many people are unaware of the Don't Put a Saddle on a Dead Horse rule.

Visual is OK on stranded ropes which can be opened up so you can see the internal strands/wires. Non-rotating ropes cannot.

quote:

Originally posted by Josh:
Do you mean wire ropes on the crane/hoist or rigger wire ropes being attached to the crane/hoist hooks?

Josh,
I'm referring to the running rigging which connects the hoist and the hook.

My favourite source for chains, rope, blocks and related items was the catalog of The Crosby Group.
Now they are on the internet http://www.thecrosbygroup.com/Crosby/HomePage.nsf/ProdW...iew&Language=English

The Product Warning & Application page has interesting information

Another source can be any safety related site about rigging.

What do you mean by "non-rotating" ropes? We send out rigging lofts for recertification every 6 monthly. Inspection methods left to the inpsector but I think they refer to an API standard. The ropes on the crane itself are visual inspected every 6 monthly also.

This message has been edited. Last edited by: Josh,

quote:

Originally posted by svanels:
My favourite source for chains, rope, blocks and related items was the catalog of The Crosby Group.
Now they are on the internet http://www.thecrosbygroup.com/Crosby/HomePage.nsf/ProdW...iew&Language=English

The Product Warning & Application page has interesting information

Another source can be any safety related site about rigging.

Thanks; but, I was actually looking for feedback on which techniques people are currently using in various industries.

quote:

Originally posted by Josh:
What do you mean by "non-rotating" ropes? We send out rigging lofts for recertification every 6 monthly. Inspection methods left to the inpsector but I think they refer to an API standard. The ropes on the crane itself are visual inspected every 6 monthly also.

Josh,
A better term is probably 'rotation-resistant'
All ropes have tendency to twist as load is applied. Rotation-resistant ropes have produce less torque in the rope as load is applied and therefore have a lesser tendency to twist.

Charlie,
Here is some basic inspection information:
http://pythonrope.com/wireropes/wr_techinfo_0.shtml

Here is a company in the wire rope testing business:
http://www.dmt.de/en/services/mining/structural_compone...re_rope_testing.html

Visual inpsection is limited to the outer surface and is tedious, time consuming, and may not be practical.

Walt

quote:

Originally posted by Walt Strong:
Charlie,
Here is some basic inspection information:
http://pythonrope.com/wireropes/wr_techinfo_0.shtml

Here is a company in the wire rope testing business:
http://www.dmt.de/en/services/mining/structural_compone...re_rope_testing.html

Visual inpsection is limited to the outer surface and is tedious, time consuming, and may not be practical.

Walt

Walt,
Are you currently using these technologies; if so, I'm interested in your experience with that.
Do you discard ropes strictly based on condition evaluation or do you still set a time/usage limit?
Thanks,
Charlie

Charlie,
Sorry, I can't help you on this one. Perhaps others with relevant experience will voice an opinion.

Walt

Charlie, do you mean the ropes are not prone to twisting during lifting? - I guess so after reading the Python website.

This message has been edited. Last edited by: Josh,

quote:

Originally posted by Josh:
Charlie, do you mean the ropes are not prone to twisting during lifting? - I guess so after reading the Python website.

Josh,
That's correct. There is less tendency to rotate the load. This is accomplished by alternating the lay of the different layers of rope. Because of the alternating lays, you cannot untwist the rope to inspect it internally, as you can with a traditional stranded rope.

we r facing a problem that when operator uses the overhead crane for lifting the laddle filled with hot metal in LD shop ,he cannot see the hook below him in lifting the laddle . the temperature of molten steel filled in laddle is 1700'C . we want to go for a camera which can give a clear picture in operator cabin of the position of hook for safe operation because a sliet mistake can lead to disaster . i m requesting all forum member to tell me a solution of specification of camera which can give a clear picture of hook inoperator cabin .

Monendra, you are just a bit off topic. I suggest you start a new thread and maybe also post it at the Infrared Thermography forum.

This message has been edited. Last edited by: Eugene,

Charlie,
We check 10 Yale, 2 speed, 2 ton hoists every day before start up with a go-no go gage based on the same measuring principles demonstrated on the Python web site. Looks a lot like a tuning fork with oversized relief behind smallest measurement so rope will pass through the “pinch point” (smallest permissible rope size) and provide tactile feedback to operator. Measurements are taken every 6 to 8 inches for full travel while running in slow speed. We also look for other know types of wire rope defects visually. Before using the gage we were changing ropes regardless of condition quarterly. Monitoring began in March of this year and three ropes have been changed. Big savings...3 as opposed to 80 YTD.
GOOD IN = GOOD OUT

Noisemakr: Just curious, cost of the gauge vs cost of 80 ropes?

This message has been edited. Last edited by: Eugene,

Wire ropes...$11,840....100 bucks to make gage in house..... Priceless....

What is the go-no go gauge? Do you have any link to see it? Can we use to inspect crane ropes offshore?