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 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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If you have special requirements, test pressure exceeds 0.5mpa, the matching manufacture fixture is fixed on the heat exchanger tube plate, pushing pressing head test.

若有特殊要求试验压力超过0.5 MPa时，可制做配套夹具固定在换热器管板上，推压枪头进行试验。

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