Anamet - CE Code Heavy Duty Liquid-tight conduit and marking
This requirement did not exist in previous versions of CE Code-Part II, where any CSA-approved liquidtight was permitted.
The CSA standard covering liquidtight fittings, C22.2 No. 18.3, has also been recently updated to include requirements for Heavy Duty fittings, and those manufacturers are working on getting their fittings approved.
John Richardson
October 26, 2020 – The 2018 version of CE Code-Part II introduced a new product rating (and related marking) for liquidtight conduits—Heavy Duty (HD)—which is now required for use in any hazardous location that allows the use of liquidtight flexible metal conduit.
(source: Electrical Business Magazine)
https://www.ebmag.com/ce-code-heavy-duty-liquidtight-conduit-and-marking/