Question regarding the installation of an emergency shut-off valve 10 meters outside the flexible hose
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The standard specifications state that an easily operable emergency shut-off valve should be installed on the loading and unloading pipelines at a distance of 10 m from the car loading/unloading cranes for liquefied hydrocarbons and flammable liquids. ”Such a regulation. Question 1: Why is it set 10 meters away? Such a large distance makes it less convenient to operate, doesn’t it? Question 2: Does an easily operable emergency shut-off valve refer to one that is easy to operate manually, or is remote control operation also acceptable?
It is explicitly stipulated in the GB50160 Code for Fire Protection Design of Petrochemical Industries. The emergency shut-off valve is located 10 meters away from the unloading crane position. Personal understanding: Pneumatic systems are generally used more often. An emergency shut-off valve can have a handwheel, but it must have a remote shutdown function. 10m distance to prevent valve failure and damage in emergency situations. Its operation buttons are outside the operation area.
A distance of 10 meters is intended to prevent access to the area in case the containers overflow.
1. A safety barrier for the emergency shut-off valve is located 10 meters away； 2. Remote control shutdown or interlock automatic shutdown.
This is to isolate the connection pipes from other devices, thereby reducing fire-related losses.
This post was last edited by Xiaoyao de Xiao Yu on 2020-11-6 at 08:47. A distance of 10 meters lies outside the explosion radius; this is to prevent manual emergency shutdowns at the scene, as the danger is too great or the fire is too intense to approach. Remote control of the emergency shut-off valve is possible and even preferable, but it must be ensured that it can also be activated manually on-site. All of the above requirements are in place so that, in the event of an accident, the material can be cut off promptly and quickly, thereby preventing the expansion of the danger
Settings are required for both loading and unloading – what is the purpose of the unloading settings?
Unloading is definitely required; it is mentioned in the explanatory notes for the petrochemical sector, with examples given. Is it installed before the unloading pump or after it? I’m not sure if there’s any specific specification for this
I agree with you; safety must come first in everything
No relevant provisions or explanations were found. Could you give some guidance?
The emergency shut-off valves for flammable and highly toxic tank trucks are located in the middle of the vehicle or even at the front, not at the rear; this ensures that those responsible for operating the shut-off valves can handle the situation safely and promptly