ClassNK- TEC 0906
ClassNK issues Technical Information TEC- 0906 regarding the devices to prevent the passage of flame into cargo tanks in chemical and oil/chemical tankers.
The design, testing and location of devices(flame screen, flame arrester, high velocity device etc.) to prevent the passage of flame into cargo tanks in chemical and oil/chemical tankers prescribed in MSC/Circ.677 was amended to MSC/Circ.1324 as follows.
1. Amendment
The devices on chemical and oil/chemical tankers certified for the carriage of chemicals which are required to follow the apparatus group IIB(including no description of apparatus group) or IIC, based on the apparatus group assigned as per column i” in the table of the IBC Code, Chapter 17, should be tested with the ethylene(apparatus Group IIB) or hydrogen(apparatus Group IIC). Accordingly, it is necessary to install the suitable devices for the carried chemicals as the amendment.
2. Application
(1) New ships
The MSC/Circ.1324 is applied to the ships constructed on or after 1 January 2013.
(2) Existing ships
The MSC/Circ.1324 is applied to the existing ships constructed before 1 January 2013, no later than the first scheduled dry-docking carried out on or after 1 January 2013. The existing ships are required to comply with following (i) or (ii).
(i) Exchange the devices
In case where the devices are not tested and approved as suitable apparatus group for the carried chemicals, the devices in ships should be exchanged for the suitable devices *1.
In case where ships exchange existing devices for the tested and approved ones, plan approval of
“The revised cargo vent piping diagram (including the information about the name of manufacturer and type of newly installed devices)” and “Drawings which are necessary to revise in relation to the exchange of devices*2” are required. We would therefore like to ask you to submit at least three copies of them to our Natural Resources and Energy Department with a application form
For more information, click here.
Source: ClassNK