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[Sawsan]

Hi All,

I am seeking your technical views on the recommended slope of flare subheaders in onshore and offshore facilities. In order to ensure adequate drainage, the slope typically is 1:200 by some engineering guidelines. Flare main headers typically are designed for slope 1:500
In view that subheaders are relatively shorter than main flare header, do you agree that at least 1:200 to 1-400 is needed to ensure adequate drainage. Have you experienced potential optimization of flare subheaders and tail pipes slope of 1:500. API 521 7th edition did not distinguish the slope of main headers and subheaders when stating :''
A slope of 21 mm in 10 m (1/4 in. in 10 ft) is suggested for all laterals and headers, taking into account piping deflections between supports.''

Thanks

Regards,