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Safety Factors for Stainless Steel Tubing

Safety Factors for Stainless Steel Tubing

Safety Factors for Stainless Steel Tubing

(OP)
How does a 6:1 safety factor relate to stainless steel tubing specfications?

RE: Safety Factors for Stainless Steel Tubing

It doesn't.

Mike Halloran
Pembroke Pines, FL, USA

RE: Safety Factors for Stainless Steel Tubing

(OP)
MikeHalloran: Thanks for the response. I have a client asking for "material for instrument tubing shall be stainless steel with a safety factor of 6:1". It didn't mean anything to me either.  

RE: Safety Factors for Stainless Steel Tubing

Maybe some context is missing.  I might guess that the customer intended a minimum fs of 6 for bursting against the design pressure.

Actually, I might ask the customer to explain in more detail what he means, because it doesn't _say_ minimum.   That's sort of implied by 'factor of safety', but lawyers could argue it either way.  

To demonstrate compliance with a strict interpretation of what's written might have you using foil tubing, and I don't know where to get it or how to terminate it.

How many lawyers does your customer currently own or rent?

Mike Halloran
Pembroke Pines, FL, USA

RE: Safety Factors for Stainless Steel Tubing

So does the next sentence give you the maximum possible system pressure?
No, they have some explaining to do.  I would think that the mean that the stress from service pressure should be no more than 1/6 of the theoretical burst pressure......but....
Should it be based on the minimum strength?  What are you to use for the pressure? Any fatigue considerations? How do they rate fittings?

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: Safety Factors for Stainless Steel Tubing



SAFETY FACTOR – The standard safety factors indicate
three grades of severity of service:

4:1 –mechanical and hydraulic shocks not excessive
6:1 –considerable mechanical strain and hydraulic shock
8:1 –hazardous applications with severe service conditions

RE: Safety Factors for Stainless Steel Tubing

0707 - where do those come from?
Is there a standard?

RE: Safety Factors for Stainless Steel Tubing

good grief...we need to re-boot this series of questions

to have a safety factor you have to first have the design requirements

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