DTI calibration
DTI calibration
(OP)
I have a client who is planning on using silicone-filled direct tension indicator washers for connections. The owner's QC guy is adamant that a skidmore is required to determine the number of refusals required at a specific tension, and that's the only way, hands down, no other way according to him.
I've always seen it done where the DTI was placed into a solid steel connection until refusal with the feeler gauge is met in most of the locations into the bolt shank. Once this is achieved, usually the amount of silicone emptied is noted and visually that is what's compared on the remaining bolts.
Both methods are acceptable, right?
I've always seen it done where the DTI was placed into a solid steel connection until refusal with the feeler gauge is met in most of the locations into the bolt shank. Once this is achieved, usually the amount of silicone emptied is noted and visually that is what's compared on the remaining bolts.
Both methods are acceptable, right?





RE: DTI calibration
We just demonstrated on some "unused, not well stored", A325 bolts that bolt fracture occured before the squirter "squirted" or the required tension was obtained on the Skidmore. Trade name DTI's were required under the Contract.
RE: DTI calibration
Just read over the newest edition of the RCSC...yep, you're right, right there in black and white.
Thanks.
RE: DTI calibration
http://www.FerrellEngineering.com