I have a part to a vessel designed to ASME 2015. Customer has designed vessel and other parts to ASME 2013. I must use 2015 per Sec VIII Div 1 Appendix 43, but to help the customer get over this difference in dates which they believe is insurmountable, I am looking for a technical basis and...
We have been using 2" lengths of 2" XS SA106 GrB pipe in pairs to hold a tapped bar. One difficult application cycled this loaded pair of pipes nearly 200000 times and failed. The pipes are welded on one tangent (top and bottom). The failure has been attributed to crack initiation and...
I use the bolted connection equations from textbooks to determine either load on part or load on bolt. These equations have as inputs: bolt torque load, part load, stiffness of the part, stiffness of the bolt. My question is do many of you use this or are familiar with these equations.
Often...
I would like the Sm for 4340 and cannot find any in Sec II. I see that theu UNS is G43400. Searching the Sec II nothing is listed. Can anyone point me to where it is or another source? Thanks.
Dave Harhay
Fives Bronx
Hi everyone,
I will go to the local college library to look up fatigue curves for certain materials. But prior to going, I'm sure I need to ask for more data like UNS, or ASTM, etc. I want to look up fatigue curves for: P20 high hard, SP300, SP350, and SP400 (the last three are from Arcelor...
We have a high pressure, 30000 psi panel, made up of High Pressure Equipment and Autoclave products (nipples, valves, tees, ells, etc). The local Ontario TSSA inspector wants the rupture disk to be marked. The disk is about 3/8 in diameter and comes with a plate that details the capacity of...
Hi everyone, I ran across the mention of ceramic insert geometry in the form of a string of numbers separated by commas. But I am not able to find what those values correspond. My example that I see in a pdf on Machining Forces and Merchants Circle:
"... a ceramic insert with geometry...
We have had a failure of a component of D2 hardened to 62 to 65 Rc. The part flew into four pieces, fortuneately no one was hurt.
The ID of the part was under a stress of 10000 psi. Holes are very close and as a stress riser contributed to the catastrophic failure.
Some specifics:the...
We made solid threaded shaft(200mm dia)with groove in one end out of 4340 forged. That groove holds up a several ton load. The load bearing land of the groove has been etched with LM51 to help hold grease on its surface. Also, there are radii on the grooves to lessen the stress...
Could anyone mention the Excel spreadsheets that they know are available for fluid flow calculations in pipes, cylinders, etc. I would like to see what is available in the way of spreadsheets and purchase/ download the ones I feel that I could use.
Dave Harhay
Bronx, Taylor-Wilson
North Canton, OH
I have a fundamental question about calculating the mass moment of inertia. Using the US units and then the Metric units. But then can one use the common units conversion programs, like UCONEER for an appropriate conversion back and forth?
Take an example of a solid shaft, 840kg weight, 280mm...
I need to provide a detail of a splice plate for a P33 railroad rail as well as the drilling of the rail for that splice plate.
Searches dont come up with much on this rail. Can anyone provide a lead as to where I can ask for the details of the splice plate? Thanks.
Dave Harhay
Bronx...
I received a vibration analysis report on gearmotors from a customer. There are many parameters such as position, direction, location, units, filters, detection. Also a graph .
Is there any available whitepapers or primers out on the net that I could read prior to calling and asking to speak...
