Blind flange is designed as per API 6A and API Spec Q1. It is the flange with no centre bore, used to close off completely a flanged end or outlet connection.
Weldneck flange size:
1-13/16” , 2 1/16”, 3 1/16”, 4-1/16”, 5 1/8”
Weldneck flange pressure:
From 3000PSI to 15000PSI.
