A-36 Cold Weather
A-36 Cold Weather
(OP)
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 cold weather steel? 516 Grade 70N / A572 / CSA 350WT
Our application is at -46C but the question always comes up at what temp should we consider using a different material rather than A-36.
Our customer specifies A-36 as the material but as the supplier of the stack we feel that we have an obligation to inform them of the issues of A-36.
If there is a brittle failure who is at fault us as the designer / supplier or the customer for failing to protect the stack from brittle impacts?
Appreciate your thoughts!
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 cold weather steel? 516 Grade 70N / A572 / CSA 350WT
Our application is at -46C but the question always comes up at what temp should we consider using a different material rather than A-36.
Our customer specifies A-36 as the material but as the supplier of the stack we feel that we have an obligation to inform them of the issues of A-36.
If there is a brittle failure who is at fault us as the designer / supplier or the customer for failing to protect the stack from brittle impacts?
Appreciate your thoughts!
RE: A-36 Cold Weather
If a crane, other equipment or other object strikes the stack and causes brittle failure, the initiator of the strike would normally be liable. If wind loadings results in failure, the designer, manufacturer and erector would have potential liability.
RE: A-36 Cold Weather
But, then again, API 650 tanks hold volatile liquids and a failure is a serious public issue. What stnadards or codes apply to your structure?
RE: A-36 Cold Weather
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.
RE: A-36 Cold Weather
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."