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I'm looking for the maximum allowable vacuum in standard 18” and 24” Sch10 316SS pipe. Is there a reference I should be looking for our a formula to be used?

I have a question about this. I think that B31.3 allows for a hydrotest in lieu of NDE. However, as you get to it depends on the situation whether this is wise or not. If you were doing a relatively low pressure application with extremely low likelihood of failure on a piping system (low...

We always do a pyramiding method for weld tests. We test approximately 10%, or whatever % we decide on for that area. We pay for our own NDQ. Then, for any failure the company must repair it at their expense, retest at their expense and shoot one more weld at their expense. That way for...

Besides size, length and product I would ask what is the running pressure? Replace the cracked sections and if it is low pressure more than likely mech integrity will not be all that important. If it is an atmospheric line, this is especially true.

Yes. I have B31.1 and 31.3. However, I also have the full pressure vessel code. I can't find the section I'm looking for. I've read the whole thing, awhile ago. I remember seeing something on recommended discharges. I can find all of the discharge information on location, direction and...

Somewhere in code, I know I've seen it, there is a section on recommended practices for installation of Pressure Relief Valves. It recommends a certain height for relieving hot liquids and steam/condensate so that when it reaches ground level it no longer is hot enough to cause a safety hazard...

I like that last suggestion. I'm going to have to try that.

This setup is used to open bottom dump railcars. There is definitely variable torque required throughout the process. There is no way to predict how much the maximum torque required is going to be. This setup is pretty standard for the industry. The cars that are the hardest to open we...

electricpete: I did know that there can be some transients and that during startup and coast I can exceed that torque. The thought was that the actual deformation of the shaft occured while running at speed with the operator failing to stop in time. Hydtools: what is the ISBN for Machinery's...

I have a motor that is 3 HP and 1730 RPM. It has a 102:1 gear reduction set on it. I'm having a problem with it twisting the transmition shaft, which is 1 3/8 inch solid steel. I calculate the full speed Torque to be ~930 lbft...Correct? I calculate the Maximum shear stress to be ~20600...