Pipe branch manifold and method of operating the pipe branch manifold

摘要

The invention relates to a pipe branching manifold (7) and to a method of operating the same, the pipe branching manifold (7) having a multitude of pipe branches (3), each of the pipe branches (3) having an entry block valve (4), an exit block valve (6), and a bleed outlet with a bleed valve (5) between the entry block valve (4) and the exit block valve (6), the manifold (7) having a selector means (12) for selecting either none or one out of the pipe branches (3) for switching from a standard operation to a test operation or a maintenance operation, wherein the selector means (12) allows only the one entry block valve (4) of the selected pipe branch (3) to be closed. The selector means (12) has a standard blocking element (23), and a test permitting element (31), and each of the entry block valves (4) has an entry control means (8, 9) with a standard blocking counter element (24) positively fitting to the standard blocking element (23), and with a test permitting counter element (32) positively fitting to the test permitting element (31).