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Thanks I didn’t realize it was customer specific. I don’t have the spec but I see it comes up a bit. Any major difference than AWS?

Looking to see if someone had additional details regarding WBS 5018 welding. Appreciate the response. Thanks.

Correct - with a small adjustment. Supplier (me) is "Stack Engineering / Manufacturing / Fabricating". i.e we are not just a steel supplier. Customer 2 will purchase an Engineered Stack from me and we will deliver it to Customer 1 / 2 at the job site.

Thanks all for chiming in. I've never been to this site and great support. Our customer, a boiler manufacture, sold an "A-36" exhaust stack as part of their package to their customer, a Canadian petrochemical company. This boiler supplier offered a higher grade material for the stack but that...

Thanks for the very detailed replies! Dhengr- normal operating temperature of the stack is 400F. Of course the -46 C will only occur when the unit is not operating and during an extremely cold day. The job site is near Edmonton Canada.

Thanks for the replies. ASME STS 1 Steel Stacks is what governs stack designs and they don’t address cold weather material selection or what temperature charpy testing is recommended.

ASME STS - 1 Steel Stacks does not address this issue. There is a requirement from the client to charpy test lifting lugs and weld procedures at -46C. Correct the client specifies a minimum design temperature of -46C and A-36 materials. It still comes down to 1) Is A-36 an acceptable material...

Don't know if this should be in the Structural Engineer or Materials section. The project is a self supporting stack that would be behind a natural gas fired boiler. We always use A-36 material but are aware of brittleness at low temperatures. Is there a general "rule" when to switch to a...

Don't know if this should be in the Structural Engineer or Materials section. The project is a self supporting stack that would be behind a natural gas fired boiler. We always use A-36 material but are aware of brittleness at low temperatures. Is there a general "rule" when to switch to a...