It is very important to remember, that in usual European pelleting conditions the steam must be hot, dry and should be added under stable pressure.
The advices given below are very important and should be always remembered:

1. General rule for steam addition lines is to create many dewatering points, especially in vertical parts of piping.
   
2. Piping should be sloped downward according to transportation direction. The level difference should be 0,5cm in 1m section. If the piping is very long we can save on height using siphon bottles.
   
3. It is recommended to use cumulative pipe for steam carrying off branches. Cumulative pipe can also serve as drip separator. The diameter of the pipe should be big enough to slow down the speed of steam for separating the transported water and for discharging by dewaterer placed at the end of the cumulative pipe. Also the cumulative pipe should be sloped downward and be located below the level of pellet mill, so that water could freely strain “upward” from a pipe.
   Moreover, planning the size of cumulative pipe we should also think about its future application like for heating of containers with molasses (treacle) or fat
   
4. It is obvious, that all valves and piping should be properly insulated in its whole length, and distance from conditioner to boiler should be as shot as possible.
   
5. In the past sometimes was used a following practical solution: steam piping and molasses piping were built simultaneously and were insulated together. This was how the molasses was heated. But it unfortunately decreased the warmth of pelleting steam. Nowadays it is suggested to design separated line for molasses heating using warmth coming from cumulative pipe. This solution the warmth of pelleting steam is stable.

Please consider while designing steam line:

1. it is recommended to use safety-valve, suitable for the line
   
2. quick closing-valve with automatic dewaterer supplying pellet mill with steam, could be the first step to automatic control of pelleting process
   
3. dewaterers are most important devices of steam distribution system
   It must not be forgotten that during start-up dewaterers must be able to reduce excessive amount of water. The whole amount of steam used during the start-up is created without overheating and contains water.
   
4. in start-up phase there appears significant quantity of water; it is very important to install adequately big container, where the water will be gathered; it should be located outside the steam system. Then the water from the container is piped away to supplying water container
   
5. cumulative pipe is as important as dewaterers
   
6. remember that behind the drips separator should be placed following devices: dewaterer, steam movement indicator, cut-off valve (especially when we want to increase level of drips or we expect, than in piping can be antipressure created.
   Steam movement indicator lets us control if drip unloading is in order. Indicator must be placed in very available location.

The level of condensed steam can be increased by pressure of the steam, but we should remember that 1 atmosphere answers to 10 meters. Diameter of pipes should be so wide to transport steam without pressure decreasing. It has been proved that little diameters of pipes are often the cause of limitations in steam line and decrease productivity of pellet mill.