Contrast is bolt due to bending moments

　　After gasket stress is more than 9 mpa, will not leak. But because the gasket will occur under high temperature creep, compression is more and more big, the amount of springback ability worse and worse. When creep variable is small, but if the gasket stress is greater than the mP, gaskets should not leak, the hydraulic flange without hot tight; But when the worm variables is larger, the gasket stress may be less than mP, gasket leakage will happen at this time, need to consider the hot tight. Operating conditions of bolt stress distribution along the length direction of the inner stress distribution, stress distribution along the length direction plate flange lateral. In length to 0, and 100 mm respectively stud two points, the inside of the cross section at the top and bottom section length of 0 and 100 mm respectively stud section at the top and bottom section of the lateral of the two points. Blind flange on the maximum stress occurs in the nut and the upper and lower flange near the contact position, less stress on both ends.

　　Contrast is bolt due to bending moments, the inner tension and the lateral pressure, the pre-tightening force and bending moment under the joint action of the medial tensile stress is larger, the lateral smaller. After add internal pressure butt welding flange bolt stress distribution in whole with a preloaded consistent, but the stress increase. Flat welding flange on both ends of the stress increased obviously after heating, other position slightly increased.

　　Hebei Shengtian Pipefitting Group Co.,Ltd is specialized in producing stainless steel pipe fittings,stainless steel flanges,stainless steel elbows,stainless steel tees,cross, reducer (concentric and eccentric reducers),stub ends and caps. Products variety,sizes diverse,beautiful appearance,stable performance,not only have variety materials (201,301,304,304L,316,316L,321,310S）welding and seamless elbows,also can produce according to the standard of GB12459,ASTM 403,DIN 2605(elbow),DIN 2609(Stub End),DIN 2615 (TEE),DIN2616 (Reducers) standard pipe fittings,stainless steel pipe fittings include A & B series,long radius and short radius,and we can produce the special products according to clients request.