Hi,
Normally E7018 is packed with carton in that case it needs to be baked to ensure that humid content is minimum. The recommend temperature is 300 to 350 Celsius degree and 1 to 2 hour. The higher temp. the shorter baking. The purpose of baking is release humid it means that if electrodes expose to the environment more than 3 hours (not in portable dryer kept in 50 Celsius) they need to re bake and not more than three cycles.
Another options for EXX18 (E9018 / E10018 ...) , electrodes is packed in hermetically box (not vacuum) with small amount. In that case Exx18 - yn 4HR is the code name. With this type the baking is no need (if you believe that no damage being on the box) and of course electrodes remained shall be baked for the next use.
In the case that electrodes keep in storage (50 C degree) it can re-use without re-bake.
Hope that it can help
Dan TN
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Normally E7018 is packed with carton in that case it needs to be baked to ensure that humid content is minimum. The recommend temperature is 300 to 350 Celsius degree and 1 to 2 hour. The higher temp. the shorter baking. The purpose of baking is release humid it means that if electrodes expose to the environment more than 3 hours (not in portable dryer kept in 50 Celsius) they need to re bake and not more than three cycles.
Another options for EXX18 (E9018 / E10018 ...) , electrodes is packed in hermetically box (not vacuum) with small amount. In that case Exx18 - yn 4HR is the code name. With this type the baking is no need (if you believe that no damage being on the box) and of course electrodes remained shall be baked for the next use.
In the case that electrodes keep in storage (50 C degree) it can re-use without re-bake.
Hope that it can help
Dan TN
On Mon, Sep 6, 2010 at 6:04 PM, MAHANTESH LONI <mahantloni@gmail.com> wrote:
If your using electrodes which are vaccum packed, no need of baking. Electrodes are packed in normal packing then you need to follow manufacturers recommendations, code only gives minimum requirements.Regards\LoniOn Sat, Sep 4, 2010 at 2:40 PM, Srinivas Engr <srinivas.gmsrini@gmail.com> wrote:
Dear all,
I am in confussion?
What's called hermetically sealed packages?
According ASME section 2 c SFA 5.1, Table A3,
for E 7018, its says 140degree Celsius is enough for backing oven
conditions, when its removed from packages.
but some manafatures says 300-350 celsius.
according to Table A3, we can use after baking in holding oven by 140
celsius & with quivers in site. am i right?
Is it correct or not?
When E7018 is expsoed to air, then only we have to baking to 300 - 350
celsius according table A3.
is any conflict in this? r any wrong in this?
Pl clear me...
Thanks
Srinivas
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