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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...

Another concern with this combination is solid metal embrittlement of the stainless steel by the zinc. Richard

here is a link to a pdf on skewed fillet welds www.jflf.org/pdfs/papers/design_file102.pdf‎ Richard

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...

Look for a software package that will do a code check, i.e., will check and limit your input to those allowed by the code. Richard

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

The AISC paper above was written to combat the publicity caused by the failures attributed to the Galveco process. The Galveco process introduced other low melting point elements into the galvanizing alloy. Umicore withdrew Galveco from the market in March 2007. Below are some additional...

Zinc and the additives used in the galvanizing, especially Bismuth & Tin form a low melting point eutectoid that wets the grain boundary surfaces. This eutectoid reduces the energy required to "unzips" i.e. crack the steel while in the dip kettle. From page 35 NYRSTAR Half Year Report 2008...

Helium is usually introduced at a low pressure, I would not expect it to be beneficial nor harmful to the tube, tube sheet or joint, hence NDE. I general it is not required by the ASME code, though there are exception.What code sections are you working with? HE testing is very sensitive a good...

Just recently finished an IBR project (We supplied some reheater assemblies). I am not sure that your equipment would fall under the IBR but with all India projects the determination is by the local authority. Some items to be aware of. IBR require that your welder be requalified to the IBR...

LME or LMIE cracking of the steel and welds due to galvanizing can occur. Zinc is a paramagnetic material therefore magnet particle inspection can be utilized. For best results with this nde method utilize Dray power AC yoke method. Here are a copy articles, though several years ago, that may...