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噸燃油鍋爐容量或鍋爐出力，一般來講應接近生產或生活最大用汽量，或者是用熱量。而生活最大用汽量或用熱量，一般則是鍋爐額定蒸發量的80%左右，這樣是最合適的。不過，有很多方面的因素，會影響到鍋爐的運行工況，比如管道損失、鍋爐水垢等。
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.
蒸汽鍋爐在銘牌蒸發量相同的情況下，其給水溫度有20℃、60℃、90℃、100℃及105℃之分，給水溫度不同，則鍋爐的蒸發量也有很大的差異。所以，這一方面也要考慮到，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.
蒸汽鍋爐銘牌上所標注的額定蒸汽壓力，應該要比供汽管道阻力及生產所需工作壓力的總和大才行。并且，我們也不能忽略了管道阻力的存在，這是因為額定蒸汽壓力較高的話，那么其飽和蒸汽溫度也是比較高的，這樣就會對管道阻力產生影響。
容果鍋爐受熱面積大的話，那么其出力比較大且超負荷能力強，反之則是相反。此外，在容量相同的情況下，受熱面積大的話，那么其排煙溫度相對要低一些，但鍋爐效率則要高。
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.
