A strip can be used in a heat exchanger

Hello, everyone, I have a problem, always can not understand the GB/T151-2014 standard in the P10 page of the 5.3.3 on the lining of the use of conditions, there is no God can help me explain it, very grateful!!
2017-04-26 Reply
Lining composite structure shall not be used:
1 design temperature above 300 degrees;
2 in the working process, there is a vacuum condition;
3 medium toxicity is extreme or highly dangerous
2017-04-27 14:19:06 Reply
The lining here shall be the lining ring and the lining structure, such as overlay or explosive composite plate structure should be used
2017-04-28 18:47:22 Reply