Bolt Tightening Torque Values for the Foundation Bolts

Righty tighty, lefty loosey.

Look up the values in any of dozens of mechanical engineering handbooks.

Search, "bolt torque values".

please suggest any refrence book

Green EGGS and ham

Bolt pretensioning of pressure vessel anchor bolts are done the same way as anchor bolts for structural columns.

The "turn of the nut" method has been used for decades. There are also other methods approved by AISC.

Turn of the nut method requires inspection and marking of both snug and "turned" bolts. There is a certain sequence that must be followed.Galvanized bolts/nuts may be a problem

Note that the vessel anchor bolts are outside of the Pressure Vessel design rules and that the rules for bolt torqueing of piping and vessel body flanges is in accordance with different rules.

http://www.appliedbolting.com/turn-of-nut-bolting-method.html

http://www.fastenal.com/content/feds/pdf/Article%20-%20Structural%20Bolts.pdf

Turn of the nut is a good method, if you are using structural bolts (A235 or A490), but ensure you know what material the anchor bolts are as they are usually not the same strength(material type) as structural bolts. They are normally a lower grade with weaker properties so you have to be careful not to over torque them and risk failure.

AICS and CISC may have something in them, I can't recall as I have been out of that industry for a couple of decades.

Flog them up until they break, then back them off a quarter of a turn.

There is no direct rule for "anchor bolts" because there are different kinds of anchor bolts, different materials and different methods of anchorage in the concrete.

The question back to you is, "Is the tension specified on the project documents?" if not, they only need to be snug tight. If you try to torque up some bolts, you may break them or pull them out of the concrete, I've seen both of these things happen because of over enthusiastic torquing.

Please also take into consideration the material(s) plies composition residing within the "grip" area when performing the torque value lookup.

All too often the bolts/nuts get torqued at a value based solely on the bolt grade rating torque chart value which is much too high for the material(s) plies within the "grip" area.

This oversight will result in damage, collapse, and/or failure of the material(s) and eventually the device/machine/equipment.

Example: Tightening a grade 8 bolt to the maximum torque chart value that is installed in an aluminum electrical buss structure will cause severe distortion, collapse, and/or rupture of the aluminum buss. This in turn will result in a poor electrical connection that will suffer high temperature and eventually complete failure of the buss at that location will occur. Sometimes the process is accelerated and the resultant phenomonon is impressive to say the least.

I am certain one of the publications recommended by Lyn will contain a section on this consideration.

For installation of pressure vessels on structure or foundation, normally vessel designer/manufacturer gives the design values for foundation bolt torque. As these vessels are subjected to wind pressure, which is taken more then the maximum historic values from the data of the specific region/area. Based on the factor of safety above the highest wind pressure for which vessel is to be subjected, foundation bolts are required to be torqued.

Mount the Vessel on Concrete Base -lightLY tighten Bolts - while Vessel axis is Plumbed with wedges below baseplates.Then Grout the voids below the base plates- 3 or 4 or more .

Pressure Vesssel's functions will continue inside Vessel .

Nothing to do with foundation Bolts .

Just flog them up until they break, then back them off 1/4 turn.