Monthly Archives: March 2017 here

Thread galling is a common yet a seldom understood fastener problem seen by engineers and fabricators. It occurs when pressure and friction cause bolt threads to seize to the threads of a nut or tapped hole. The fasteners are not just overly tight but “cold/contact” welded together.

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weld-neck-flangeQ: I have a high pressure application with HCl at fluctuating temperatures. Can you recommend the best flange to provide a safe secure joint? A: Hands down, the weld neck flange is best for these types of hazardous, high pressure applications. Weld neck flanges are easily identified by their long … Continue reading

Posted in Corrosion Resistance, FAQs, High Strength, High Temperature Resistance, Technical Questions, Uncategorized | Tagged , , , , | Leave a comment

threaded-flangeQ: When do you recommend to use a threaded flange? I need a flange that can be changed easily & frequently. A:   After speaking with the customer, I found out that he has a pilot plant where he will be frequently changing parts. In this case a threaded flange is … Continue reading

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Q: How do I calculate the actual break force or yield of a bolt for a particular size? A:   The Ultimate Tensile properties for a material like Hastelloy C276 is independent of the size of the bolt, as its based on the x-sectional area of the bolt which typically … Continue reading

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Inconel fasteners are commonly used for extreme environments and come in various “flavors” depending on the needs of the application. This brief paper will give you a quick comparison of the two most popular grades, Inconel 625 and Inconel 718 to help you choose the best material.

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