需要注意的问题：
Need to pay attention to the problem:
1、 瓷釉的合理配比。搪瓷是瓷釉烧结后成为一种密实的高分子物体，而瓷釉是由各种有机物质做成，瓷釉原料纯度将直接影响搪瓷质量。
1, reasonable mixture ratio of ceramic glaze. Enamel is sintered into enamel polymer objects a dense, and the enamel is made of organic material, enamel enamel quality will directly affect the purity of raw materials.
2、 制造与安装质量的控制。制造厂的制作质量是保证搪瓷层均匀、致密地被防护基体表面成型，金属管表面层釉处理不好会降低粘接强度，甚至会分层脱空，搪瓷表面污染会降低搪瓷层之间粘接强度，除气泡不当会增加分子式空穴存在，固话时间、温度不达标准会导致搪瓷层内聚集强度低等缺陷。
2, manufacturing and installation quality control. The quality of production factory is to ensure that the enamel layer is uniform, dense protected substrate surface molding, metal tube surface of the first layer of glaze will deal with the lower bonding strength, even delamination void, enamel surface pollution will reduce the adhesion strength between the enamel layer, in addition to the bubble there will be increasing improper formula of hole, fixed time, temperature not up to standard will lead to the enamel defects of low strength aggregation.
安装中既要注意聚四氟乙烯密封圈与管板孔的配合间隙，又要检查搪瓷管是否破损。
The gap with the installation should be the sealing ring and the tube plate hole noted PTFE, and also check whether the damaged enamel pipe.
3、 搪瓷管空气预热器不得与硬质物体碰撞，以防掉瓷。
3, enamel tube air preheater not collide with the hard object, to prevent off porcelain.
4、 搪瓷管的耐温差急变温度为300℃，不得适用于350℃以上的烟气中。
4, the temperature difference of enamel pipe blast temperature is 300 DEG C, shall not apply to more than 350 DEG C in flue gas.
5、 为防止管口密封采用焊接而造成搪瓷管管口周围搪瓷层严重破损，搪瓷管采用聚四氟乙烯密封圈密封，既可以防止搪瓷破损，又可以抵消在管箱制作存在扭应力、压应力和在投入运行后的热应力，保证搪瓷管在管箱中能自由松动，不受破损。
5, to prevent the nozzle seal caused by welding tube around the enamel enamel layer seriously damaged, enamel pipe with PTFE seal, which can prevent enamel damage, and can be offset in the tube box production exists torsional stress, compressive stress and put into operation after the thermal stress, ensure the enamel tube free in the loose tube box, not to be damaged.
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