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High strength bolts

High strength bolts

High strength bolts

(OP)
I do a lot of vessel and heat exchanger rerates.  Often, the flange bolts are the limiting component.  I am currently looking at a TEMA flange that would be sufficient if I change the bolts.  The problem:  Bolts made of material such as SB 637 are not only hard to find, but they are very expensive ($7000 for a set).  Does anyone know of high strength studs that are common enough to be available and cost effective?  Thanks, TEEBOOG

RE: High strength bolts

Just an idea but have you tried Unbrako in the UK. They make a cap head bolt/screw. These from memory were made froma a high tensile steel and I believe are used for the compact style of flanges commonly used on the rigs in the North Sea..

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