，根据GBT 12251-89蒸汽疏水阀试验方法，Steam traps are devices located in steam systems which facilitate the condensate removal of condensate from the steam pipes to a drain. The steam trap does this by closing when steam pressure is present, and opening when the condensate starts to collect. This action enables condensate to be removed from the steam system while preventing the loss of steam.
GB/T 12251-89 is an international standard for steam trap testing which is used to determine whether the steam traps used in a steam system are functioning correctly and that they are free from leaks of steam. The test, which is provided in two versions, involves measuring the difference in pressure between a dry and wet steam trap and then calculating the ratio of these pressures.
GB/T 12251-89 is important for ensuring that a steam trap is functioning as expected and that steam is not being lost as a result of a malfunctioning steam trap. In order to carry out the test, a pressurised steam system must be used, as well as a pressure gauge, a clamp-on digital pressure gauge and the steam trap to be tested. Once the test has been setup, the digital gauge is used to measure and record the pressure of the steam passing through the steam trap when it is dry and also when it is wet. To obtain the ratio of pressures, the following calculation should be made:
(Wet pressure- Dry pressure)/Dry pressure= Ratio of pressures
This ratio of pressures is then compared to a rating provided from the steam trap manufacturer. The acceptable range of this ratio of pressures typically varies from 0.90 - 1.10. If the ratio is outside of this range, the steam trap may not be functioning correctly and should be replaced or remedied in some way.
In addition to ensuring that steam traps are functioning properly, GB/T 12251-89 also provides a standard method for maintaining and documenting the steam traps performance over a set period of time. This documentation is important for confirming that a steam system is functioning optimally, while at the same time providing a review of a steam traps performance. This information can then be used to identify any problems that may be present with the steam trap and to diagnose any problems which may have occurred in the past.
In conclusion, GB/T 12251-89 provides an important standard for testing steam traps to ensure that they are performing correctly and for documenting their performance over time. It is important for any company working with steam systems to be aware of and to apply this standard, as it can play an important role in ensuring that steam losses are not occurring due to malfunctioning steam traps.
