That is, boiler capacity or boiler output, in general, should be close to the maximum amount of steam used in production or life, or with heat. The maximum amount of steam or heat used in life is generally about 80% of the boiler's rated evaporation, which is the most suitable. However, there are many factors that will affect the boiler operating conditions, such as pipe loss, boiler scale and so on.
也就是4吨燃油锅炉容量或锅炉出力，一般来讲应接近生产或生活最大用汽量，或者是用热量。而生活最大用汽量或用热量，一般则是锅炉额定蒸发量的80%左右，这样是最合适的。不过，有很多方面的因素，会影响到锅炉的运行工况，比如管道损失、锅炉水垢等。
In the case of the same evaporation capacity of the nameplate, the water supply temperature of the steam boiler is 20, 60, 90, 100 and 105, and the temperature of the water supply is different, and the evaporation capacity of the boiler is also very different. Therefore, this aspect should also be taken into consideration and should not be neglected.
蒸汽锅炉在铭牌蒸发量相同的情况下，其给水温度有20℃、60℃、90℃、100℃及105℃之分，给水温度不同，则锅炉的蒸发量也有很大的差异。所以，这一方面也要考虑到，不能被忽略。
Rated steam pressure of the steam boiler marked on the nameplate, should be better than the resistance and the production of steam supply pipe required working pressure for large sum. And we can not ignore the existence of the pipe resistance, this is because the rated steam pressure is higher, then the saturated steam temperature is relatively high, so that it will have an impact on the pipe resistance.
蒸汽锅炉铭牌上所标注的额定蒸汽压力，应该要比供汽管道阻力及生产所需工作压力的总和大才行。并且，我们也不能忽略了管道阻力的存在，这是因为额定蒸汽压力较高的话，那么其饱和蒸汽温度也是比较高的，这样就会对管道阻力产生影响。
容果锅炉受热面积大的话，那么其出力比较大且超负荷能力强，反之则是相反。此外，在容量相同的情况下，受热面积大的话，那么其排烟温度相对要低一些，但锅炉效率则要高。
If the heating area of the boiler is large, then its output is relatively large and its overload capacity is strong. Otherwise, it is the opposite. In addition, in the same capacity, the heating area is large, then the exhaust temperature is relatively low, but the boiler efficiency is higher.
