Labeling issues for pipe blind plates
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Sometimes, blind plates need to be installed on the pipes of production units due to maintenance or other reasons. After installing the blind flange, signs must be placed to clearly alert the workers on site. The question is, sometimes after sealing the ends of some pipes, is it also necessary to install signs? Or, since drain valves related to hazardous chemical pipelines also require the installation of blind plates, are signs also needed?
Our approach: For any operation involving the installation or removal of blind flanges, a blind flange work order must be obtained; regardless of the size or diameter of the blind flange, the work can only proceed after the corresponding work order has been issued. After the blind plate is installed, attach a blind plate sign. The blind plate tag should be retrieved after the blind plate is removed. Blind plate signs are divided into permanent blind plates AXX (green) and temporary blind plates BXX (blue). Blind covers do not require label issuance or ticket processing. For reference only. :lol
In addition to listing, it is also necessary to maintain records in a ledger and pass them on during shift changes
Pipe blind plates, whether installed for the purpose of process isolation or for safe construction, must be labeled, accompanied by relevant permits, and have records kept. As for drain pipes and dead ends, it depends on the internal management procedures of each company; in our case, we do not require permits or signage for them
Blind plates that are removed or installed need to be labeled; there must be someone responsible for the process of installing or removing them, along with a schematic showing the location where the blind plates are installed
I also think that end cap covers do not require tickets or labeling. However, out of concern that experts conducting the inspection might raise issues and demand corrections, they simply marked it themselves; P
The definition of blind plate removal and installation tasks is too vague; if anyone requests that blind plates used to seal pipe ends be included in the category of special operations, those being inspected have almost no way to respond: L
Article 3.6 of GB 30871—2014 \"Safety Specifications for Special Operations in Chemical Production Units\": Blinding-pipeline operation with stop plate refers to the operations of installing and removing blind plates on equipment and pipelines. Article 3.2 of HG 30012-2013 \"Safety Specifications for Blind Flange Installation and Removal in Production Areas\" specifies that blind flange installation and removal shall be carried out during process operations or maintenance when there are materials (gaseous, liquid, or solid) inside equipment and pipelines, along with certain temperatures and pressures; it also applies to blind flange installation and removal after the materials inside the equipment and pipelines have been purged, replaced, or cleaned. HG 30012-2013 states in its scope of application that it is applicable to the operation of removing and installing blind flanges on equipment pipelines in the production areas of chemical enterprises. AQ 3027-2008, \"Safety Specifications for the Operation of Removing and Installing Blind Flanges in Chemical Production Units\" (now repealed), describes exactly the same things as HG 30012-2013. It seems difficult for the above regulations to support the claim that end blind plate covers do not need to be included in the management of plug-and-unplug blind plates. I’m not sure if I understand correctly?
Our blind flange opening and closing operations include temporary isolation for maintenance, operation on the dual valves at the sewage outlets in the hazardous chemicals tank area, and pipeline sewage removal.
It is advisable to include end blind plate covers in the management system for plug-and-remove blind plates. This year, experts pointed out this issue, and the local safety authorities imposed a fine of 90,000 yuan as a result.