For UL1479, T rating is optional but in for EN 1366-3, the I (equivalent to T rating) is compulsory. Does it mean the EN 1366-3 is more strict then the ASTM814 or UL1479?
Does it also mean that for EN, we have to cover the metallic pipe all the time when testing, but it is not the case in real life for metallic pipe installing situation?
Hello Quan,
UL1479 / ASTM E814 and EN 1366-3 are both used as test standards for firestopping penetrations however they are prescribed in different parts of the world with different code requirements. UL 1479 / ASTM E814 are prescribed in the USA and where countries adopt the US codes and standards. Although the T-rating is an optional test within this standard it is required in the US codes for penetrations through fire resistance rated floor assemblies. It is not prescribed for wall assemblies. The EN 1366 is prescribed in the EU and in countries that adopt EU standards.
There are a number of differences between these test standards. Some of the main differences includes: 1) Furnace pressure 2.5 PA US verse 20 PA EU, 2) Optional T-rating US (based on code), 3) Hose Stream US only. Here are comments based on you specific questions.
- Because of these differences it is not valid to make a generalized statement on which standard is more strict especially since the US standards require a hose stream test which can be quite demanding on the system.
- For metallic pipe using the EN standard the requirements for covering the pipe are dependent on the entire system which includes the fire resistance rated assembly. In many cases (maybe most) the pipe will need insulation to meet the T-rating requirements.
Regards,
Cody