Hello everyone, I would like to ask whether the pressure rating of ammonia pipelines must be 25 kilograms or higher
Thread Content
Hello everyone, I would like to ask whether the pressure rating of ammonia pipelines must be 25 kilograms or higher? Are there any relevant specifications?
The \"Classification of Pressure Grades for Pressure Pipeline Projects\" specifies that the nominal pressure grades for hydrogen, ammonia, and liquid hydrocarbon pipelines should be no less than PN2.0MPa when the SH standard system is used, and no less than PN2.5MPa when the JB standard system is used
Is the \"Classification of Pressure Grades for Pressure Pipeline Projects\" a standard specification or a design manual?
The answer is yes; is the valve yellow?
From Section 2, Chapter 4 of \"Pressure Pipeline Technology (Second Edition), edited by Yue Jincai\": I. Factors affecting the determination of the nominal pressure class, Item 3: Operating medium. Article 2 of section 5.3.2 in SH/T3059, the standard specification for the selection of materials used in petrochemical pipelines within the SH standard system, provides relevant details; however, no such information could be found in the JB standard system.
Is there no more Article 5.3.2 in SH/H 3059-2012?
It seems to refer to substances that are prone to permeation in pressure vessels, and safety must be ensured by raising the flange rating. I can’t remember the specifics.
Ammonia, when it leaks out, constitutes a malodorous pollutant that can easily lead to complaints; its fire hazard is classified as category B. Therefore, the flange grade should be appropriately increased to ensure sealing performance and reduce the likelihood of leaks.