Though dated in MatCad 7 format this site has a pdf and mathcad sheet to assist in the design of lifting lugs. http://www.pdhcenter.com/courses/s106a/s106a.htm
Richard
Check the EPRI site. I don't remember the report number but there is report on dissimilar metal weld joints, and filler metals, http://www.epri.com/Pages/Default.aspx
Richard
I have seen lamellar tearing like defects in thick carbon steel plates that occurred during HDG. I ran simulations using the 2-dim finite differences models (transient heat transfer) using the kettle temperature, various base metal temp and thicknesses. My conclusion is there are probably quite...
In general heat cambering is the method of choice.
below is the rough procedure Bold items are important
The following heat cambering procedure shall be used for material with a specified yield strength not greater than 50,000 psi. The heating temperature shall not exceed 1200 degrees...
Throwing out a few ideas
1. Check the grounds. Use a IR thermometer and monitor the temperature of the ground. As needed take the ground connectors apart and clean and add a lubricate with a silver-based conductive lubricant. Many companies fail at this this simple practice that has a huge...
I have personally witnessed welds that have passed UT and RT that later failed during hydrotesting. Though the code or specification may allow it, being conservative I would recommend hydrotest. for example, if the wrong filler was used (lower strength) a sound (passing RT or UT) weld may be...
As previously mention use a plastic/polymer or composite electrical enclosure.
Completely cover the electronics with a conforma coating, an example is http://www.farnell.com/datasheets/1673864.pdf .
Note the coating will reduce the heat transfer of the heat sink, a couple of ideas:
- increase...
To help you make up your mind. Study and take the patent bar exam. You can work as a patent agent while in Law school, if you decide to go that route; or if you decide it is not for you without spending all the money and time on Law school.
Richard
Another application of ferrite testing of austenitic stainless steels is to assure proper heat treatment of the bends following cold bending operations. Typically used in testing bends in boiler superheaters, rather then hardness testing.
Richard
I first obtain a PE license in Mechanical Engineering in the late-80's and in Welding Engineering in the early 00's. While employed in the manufacturing industrial segment for a global company, I was identified (because of the PE) as an expert in the specialties, this led to several global...
Follow this link to the Forensic report on the Mayflower Pipe Break http://posting.arktimes.com/images/blogimages/2013/07/31/1375318588-metallurgical_report_no._64961__rev._1.pdf. I just started reading the report, but it make me wonder how many 60 plus year old ERW pipeline are in service and...
Watch out for Solid Metal Embrittlement caused by the zinc in contact with the Stainless Steel. The severity of embrittlement increases with temperature, with a sharp and significant increase in severity at the Tm (melting point) of the embrittling (zinc) agent.
Richard
