When the biaxial nominal stresses are equal to each other, the mathematical relationship between loading strength and porosity can be also gained for the foamed metals under biaxial equal loads.
当双向承受的名义应力相等时，还可得到泡沫金属在双向等荷承载条件下的载荷强度与孔率的数学关系。
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On the other hand, the recessing in the joint with low elastic modulus adhesive caus es the peak stresses increase evidently that may decrease the nominal and actual strength of the joint markedly.
It's suitable for the small caliber valve nominal diameter: airproof test and strength test of DN15/100 flange type, through-type gate valve, cut-off valve and ball valve etc.