Hello, I have a question with respect to the isolation valve installation standard for LNG Vaporizer.
As per NFPA 59A 2013 edition, where the heated vaporizer is located less than 50 ft from the heat source, it shall have an automatic shutoff valve in the LNG liquid line located at least 10 ft from the vaporizer.
Would you tell me why an automatic shutoff valve shall be located at least 10 ft from the vaporizer?
Thank you.