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Never mind, I found my answer at AISC's FAQ section https://www.aisc.org/DynamicQuestion.aspx?Grpid=6&QueId=1782&ste=_Preview&id=2100&type=0 6.6.8. What is the upper limit on the installed tension of high-strength bolts? As stated in 2004 RCSC Specification Sections 9.2.1 through 9.2.4...

3/4" bolts

We have some SA-193 Gr B7 bolts on flanges that we overtorqued. We torqued them to 450ft-lbs. Some of them streteched upto 3/8" over 8" long bolt rod. The vessel passed the test. However, we want to know whether the bolts need to replaced or over-torquing the bolts OK as long they don't break ?

Does anyone here have experience with building bullet resistant door (Level 4 protection : .30 Caliber Rifle (1 shot)) ? If yes, can you please share your design experience as how to you achieve the bullet protection, esp, plate thickness, in-fill core etc. Thanks StressStrain

I found a great reference to calculate the force due to impact, while accounting for the ductility of the material. IMPACT EFFECT OF FRAGMENTS STRIKING STRUCTURAL ELEMENTS (http://www.osti.gov/scitech/servlets/purl/4315907) The force calculated by using equation 13 is way less then that...

I have verify and calculate impact force analytically. The purpose of the plate is to act as a shield

We have a projectile of mass m travelling at a velocity of v impacting in elastically to 1/2" plate. Assuming there is no local perforation of projectile, how do I determine that the global response of the plate is acceptable (i.e. some plate yielding is acceptable as long as it does not form a...

I agree with 'dik' regarding the fleet angle (2 deg recommended). However, in my case the cable is not winding on a drum, but is going through another sheeve pulley whose is axis is offset by 10 degrees. Does 2 deg allowable is still the maximum allowed angle or can it be allowed more than 2...

Ideally the cable should be pulled in line with the sheeve, however the case is such that cable has to be pulled at an angle. My question is, how do I calculate the maximum allowable angle before the cable slips off from the sheeve ? Any help/pointers will be greatly appreciated...

What is the maximum 'g' load (acceleration) that will be applied to a flexible component during road transportation in US. Is there a guide/MIL Spec/Rule of thumb I could use ? Thanks

I would suggest "Pressure Vessel Handbook" by Bednar. Its concise and highly referenced in pressure vessel community.

Does ASME discusses about the stress due to thermal shock of introducing fluid at high temperature to a pipe at ambient conditions ? If yes, can you refer the appropriate section. PS: I have posted similar question on pipeline forum. I apologize for double posting in advance.

This thermal shock on the tube is due to internal constraint wherein inner surface has high temperature and outer surface is at ambient, the inner surface watns to expand and outer does not, hence creates an internal stress. This, I believe, has independent of any external constraints.

After having performed thermal analysis the stress calculated per equation comes out to be much greater than yield strength. In such a case, how do one typically reduce the imposed stress ? Sigma = alpha*E*Delta_T/(2*(1-Poisson))

I am trying to figure thermal shock stresses imposed by sudden inflow of pressurized steam at 650F in the tube at ambient conditions. How do I go about calculating the thermal shock stresses generated ? Any pointer/references will be greatly appreciated. Thanks StressStrain

That is a good suggestion chicopee, let me run it past the project engineer to see if we are allowed to it on this project. Thanks .

The damper is similar to http://www.ruskin.com/model/CD35 We are concerned about damper operating to break the ice blocking the vanes. Using heat tapes is not an option because this damper has to operate in case of a power failure. Knowing that ice strength varies widely based on the kind of...

Thanks everyone for the suggestions. We were successful in lifting the pressure vessel by tailing vessel with the forktruck, using straps long (choked to 2 legs and lifted at one point) enough to prevent interference when vessel is lifted into vertical position by the crane. Everything went...

We do have forklifts in the shop

Hi, One of our cranes has stopped working. So we have only functional crane in the shop. Any ideas on how lift-up the the pressure vessel from its current position (lying horiztonal on ground) to vertical position (on its feet). Lifting lugs are located on the top head. Pressure Vessel is 90"...