Although Morris Coupling Inc, sales stated 15 psig some vacuum (~ 7 psi vac), they would not put the pressure limitation in writing. Similarly HP Products does not publish limits, but verbally reports 15 psig / FV. Two other manufacturers said similar things.
(a)Is there a standards organization that covers these plan bare end compression couplings?
(b)Are there other bare end tubing/piping couplings that have like UL standards proof testing, or that meet some recognized standard, similar to the ASME piping code?
(c)Is there a consensus on the application limits or a respected reference that is published on how to apply them, e.g., when to deviate from the first coupling and use the second &/or know how many bolts to specify on the coupling? etc.
Plain Bare End Tubing Coupling for Pneumatic Conveying
I am updating piping specifications, and haven't been able to confirm the pressure rating for compression couplings. So far a VERY frustrating search.
Morris Coupling, INC, sells these two prototypical configurations
these "lower pressure" couplings use 3 to 6 bolts to clamp the rubber sleeve to the tubing.http://www.morriscoupling.com/Produc.../prod1pic.jpg
and this split style is used for "higher pressure". http://www.morriscoupling.com/Produc.../prod2pic.jpg
Although Morris Coupling Inc, sales stated 15 psig some vacuum (~ 7 psi vac), they would not put the pressure limitation in writing. Similarly HP Products does not publish limits, but verbally reports 15 psig / FV. Two other manufacturers said similar things.
(a)Is there a standards organization that covers these plan bare end compression couplings?
(b)Are there other bare end tubing/piping couplings that have like UL standards proof testing, or that meet some recognized standard, similar to the ASME piping code?
(c)Is there a consensus on the application limits or a respected reference that is published on how to apply them, e.g., when to deviate from the first coupling and use the second &/or know how many bolts to specify on the coupling? etc.
Attachments
prod1_pic (JPG)
prod2_pic (JPG)
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