Seal the blind plate and check carefully whether the pipeline is correctly connected and block phenomenon in the pipe before pressure test.

试压前要先封好盲板，认真检查管路是否连接正确，有无管内堵死现象。

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Test method: put the specimen under the pressure plate, controlled by computer, the sponge with pressure change calculated elastic properties, elastic properties generated curve, print out the curve.

泡棉应力测试仪检测方法：将试样置于压盘下，由电脑控制，将海绵随压力的变化的弹力特性计算出来、生成弹力特性变化曲线，把特性曲线打印出来。

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Test results show the resistance of spiral plate is 30% of that of segmental baffle, and the heat transfer efficiency is improved by 10% at the same pressure.

试验结果表明，螺旋折流板阻力只有弓形的30%，此外，在同样的压降下，螺旋折流板传热效率也提高10%。

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