SY-0081 Location of safety valve for crude oil thermochemical dehydration tank
Thread Content
**Clause 9.5 of the Energy Bureau’s SY-T0081-2010 version of the \"Design Code for Thermal Chemical Sedimentation and Dewatering of Crude Oil\" stipulates that a closed safety valve should be installed in front of the control valve on the drain pipeline of horizontal thermal chemical sedimentation dewatering units. I have never understood why a safety valve is necessary on the drain pipeline How many friends have designed safety valves according to this standard? Thank you.
I haven’t come across this before, but based on its literal meaning, it seems to take into account the possibility of control valve failures. This safety valve is primarily used when there is a failure in the control valve of the drain pipeline and it becomes closed. From the perspective of safety valve design, it should be designed with valve failures in mind
It is common sense that safety valves should be avoided from being installed on drain pipelines as much as possible. The level control valve on the waste discharge pipeline is not kept open continuously; as a result, waste material can easily accumulate upstream of the control valve, potentially affecting the safety valve. I just called Jianghan Design Institute (the drafting agency) to inquire, and the person in charge of drafting has retired. My question is, why can’t it be installed on the tank? Why is it specified as a standard to install it in front of the drain valve?
It probably depends on the type of separator used. I’m not familiar with this process, but it seems that the location of the standard safety valve is determined by the type of separator
Thank you, Floor 4; there have been changes in the 2010 version.