Choosing a Flexible hose for outlet air pressure vessel

[guideonl]

TL;DR Summary

Flexable hose choosing for outlet air pressure vessel

Hi everyone,

What should be the considerations to choose the proper hose (max working press) installed at outlet air pressure vessels (11 bar) for industrial purposes? Please remark source\link.
Also, I've found a table which lists the max sys operating press for 4 different fluids (fuel, oil, hyd/pneu, inst air). What is the abrreviation inst mean?

Thank you

 

[jrmichler]

Ask/look for standard air hose. The standard rubber air hose in a local hardware store is specified for 300 PSI (20 bar) working pressure.

Inst air is probably instrument air. Instrument air is compressed air that has been dried (moisture removed) and does not have oil added.

 

[gmax137]

Right, instrument air is used in industrial applications (eg, chemical plants, power plants, etc). The IA can be used to operate valves, and various control devices.

... I've found a table which lists the max sys operating press for 4 different fluids (fuel, oil, hyd/pneu, inst air). What is the abrreviation inst mean?

This must be some kind of generic table listing "typical" values. The plants I worked in had instrument air at around 100 psig (6.9 barg). I do not recall the system design pressure (for the piping, etc.) probably twice or three times that. Many of the air-operated instruments run at much lower pressure. Pneumatic signals are typically 3-15 psi for 4 - 20 ma signals.

 

[guideonl]

Ask/look for standard air hose. The standard rubber air hose in a local hardware store is specified for 300 PSI (20 bar) working pressure.

Inst air is probably instrument air. Instrument air is compressed air that has been dried (moisture removed) and does not have oil added.

Thank you jrmichler

 

[Tom.G]

If this is for general use in areas like assembly lines for electronic equipment, pay attention to the local laws & safety regulations.

Here in California (and maybe Federal) there is a maximum pressure you must not exceed. I don't recall the exact number but believe it is around 30-50PSI (2-3bar).

We would put a pressure regulator at the head of each assembly line, but put one connector for "Supervisor Use Only" at the head end before the regulator to get the 100PSI (7bar) line pressure. That one got a lot of use!

Of course if you are powering tools or equipment you use whatever is needed.

Cheers,
Tom