0707, thank you for your response.
this is from an official letter by the supplier that does the coating :
HEAT CURE PROCESS-WARNING-CUSTOMERS RESPONSIBILITY.
Coating of Teflon® requires curing at temperatures in excess of 800F. In some instances,
such temperatures may result in distortion of...
Hello all,
I've got to quote the fabrication of a pressure vessel with a HALAR ECTFE coating.
According to coating manufacturer/installator, this coating is cured at 800°F.
I've read UG-99(k)(1) and (2) and I understand I can request an exemption (from the client) to perform an hydrotest...
thank you !
as you said, I've got confirmation by our AI to submit a revision request for the CRN for the temperature change.
It's funny, as soon as you tell the client that there are fees for that change, the temp rating at 140°F is fine.
Hello all,
I've obtained a CRN (Canadian Registration Number) for a pressure vessel. The design temp is 140°F.
we have yet to start fabrication of the vessel.
Now the client asks us to change the temperature rating to 180°F.
do I need to request a change with the Inspetion Agency (to...
GD2, the vessel doesn't have a construction code, it is not API 650, not ASME BPVC, just a simple cylindrical shape that holds liquid, Hydrostatic pressure is the main design factor and the resultant thicknesses are calculated by the BPVC formulas.
It's a new fabrication.
only one vessel wall...
GD2, . In the purest sense, yes external pressure, but with very short unsupported span, in this case a pattern pitch of 2" or 2-7/8". That sort of pattern is covered in appendix 17.
And that design is the category H fitting for which i have a CRN. The vessel is not in the equation. My dimple...
GD2,
You are right that my question is useless as I have a CRN for a category H fitting, hence the question I'm asking has already been answered during registration. It is a category H fitting and is inspected by the manufacturer (me). The CRN includes the bottom plate.
as I mentionned in my...
GD2, thanks for you input.
the logic for applying laws,codes and standards is the following :
I start with the local laws and regulations. The provincial law of Quebec calls for the CSA B-51 standard which in turn calls for the ASME BPVC design rules.
So even before opening the ASME BPVC I...
David339933, we do not have a UM certificate. Maybe in the past, but not today.
Cobra17, it's not expired, in fact, it was just renewed recently with this note, hence the confusion.
anyway, thank you all for your input.
hey guys, thanks for your reply (sorry for the delay)
I also agree with both of your answers.
yes, our dimple jacket CRN is a category H fitting (it has the ''H'' in the number). My problem is that someone (way back, when first registered) put this note on the drawing :
'' MAXIMUM SIZE OF...
Hello all,
I'm the design engineer and working for the manufacturer.
I need to follow the decision diagram in CSA B-51 figure 1a to know if a dimple jacket welded on my vessel is to be inspected by the AI or by manufacturer
just to be clear : the vessel is NOT a pressure vessel. My question is...
Hello TBP,
thank you for your reply,
nobody (not the customer, not the AI) is requiring the CRN. It's just me being cautious as a design engineer to supply a product that operates within the applicable law, that's all.
MJCronin, thank you for your response, I like the quote you have copy/pasted from the article in the link. It works in my favor...
BUT, I would like a 'real' explanation/justification from an official source text... or other designer experiences with mechanical seals on mixing pressure vessels...
Hello,
I'm from a Canadian Manufacturer. We're designing a mixing tank (with vertical agitator) 30 psig (registered pressure vessel with CRN).
Is someone familiar with mechanical seals that have a CRN ? is it common ? is it required to have a CRN ? and what are the code/law requirements for...
Ladies and Gents, scholars and laymen, gather 'round for I possess extraordinary knowledge to bestow upon you.
Question: What is the meaning of the letters outside the circular symbols on the P&ID? (A/S or W/E) ?
Response : A/S means pneumatic actuator requiring air supply and W/E means device...
another example from another page : this time it's a MIBC (Methyl Isobutyl Carbinol) tank (ULC S601 certified). installed outside (-50°C to 40°C). It's almost on every nozzle/instrument/valve.
another diesel tank is identical
'waterproof enclosure' makes sense, but it seems to me a very...
Hello !
thank you both for your answers.
jari001, I don't have such title page or cover page.
LittleInch, 'air supply' and 'electrical supply' 100% makes sense, thanks !! for w/e = 'weather enclosure' not so much because the abbraviation appears for pumps/instruments/valves and tank nozzles...
