Other specification requirements for the installation of high-strength bolts in Tonghua

Other specification requirements for the installation of high-strength bolts in Tonghua

When assembling high-strength bolt connection pairs, the side of the nut with a round table should face the chamfered side of the gasket. In general, when assembling high-strength bolt connection pairs with large hexagonal heads, the side with chamfered edges on the lower gasket of the bolt head should face the bolt head.

When installing high-strength bolts, construction personnel should strictly prohibit the forced penetration of the bolts (referring to knocking with a hammer). If you cannot pass freely, you should use a reamer to trim the hole. The maximum diameter of the hole should be less than 1.

Twice the diameter of the bolt after completion. When repairing holes, in order to prevent iron filings from falling into the gaps of the plate, all surrounding bolts should be tightened and checked for firmness before expanding the hole, so that the steel plate can be tightly tilted before operation.

One of the areas that requires special attention is the strict prohibition of gas cutting to expand the hole. Gas cutting and reaming are more likely to occur on-site and require special inspection.