You're using pipe as a structural support?

Anyway, the 10W49 refers to the testing method, not the use. Who is doing your testing for you?

Hi,

If what you say is looked at logically, it is the endurance test for the fire proofing material that should matter at the end; 10W49 is just something to be used to carry it out. I do not see what role a structural member has in this test if not to just bring on a comparable condition - your pipe should do equally well. Albeit, you have to ensure your selection of pipe for the job is commensurate with its mechanical properties equivalent to 10W49's own.

Hope it helps.

Nachi

I read this requirement to mean that the standard test to determine the required thickness for a structural support is conducted on a 10W49. If it takes 4 inches of material to have a fire endurance of 1.5 hours on a 10W49, you need to put 4 inches of material on your pipe. You should contact a fireproofing manufacturer, and I am sure they would be able to clear this up quickly for you, as well as tell you the thickness you would need for their material.

Hi, I would like to correct one of my fellow engineers responding to your query. Firstly, any reputable Fireproofing manufacturer will be able to give you the thickness required, but will need to know which type of fire hazard the structural member is likely to occur. ie. 'Cellulosic' as typically found in a house or office type of fire event, or 'Hydrocarbon', which again breaks down into 2 main types, 'Pool', or 'Jet', these include LPG, LNG, or vapours. The point I would like to correct is the statement that the thickness as applied to your 'I' beam is the same as the thickness required on your Tubular, it is not. It depends upon the formula 'Hp/A', which is the Heated Perimeter divided by the Cross Sectional area of the steel, expressed as a ratio, most manufacturers produce a Hp/A table which they readily supply free of charge, so you can check the thickness of their product required to protect your structures. Incidently, the recommended core temperature that any load bearing structural member is generally considered to be 550 Celsius maximum, however pressure containing vessels should not exceed 400 Celsius, in order to avoid a 'BLEVE'. I notice you have another post on this forum asking about a storage sphere, so I have added this latter point in an attempt to answer both queries. So the support legs will have one thickness, and the body will have another.

Regards,