3" x 18' Cryogenic Transfer Hose — 280 PSIG CL 150

What pressure, flow and temperature is it rated for?

This hose is rated for 280 PSIG maximum working pressure. Flow capacity is not specified in the listing—you'll need to ask the seller for the actual rated flow or consult the original manufacturer data for a 3" cryogenic hose of this construction. Cryogenic transfer hoses are typically rated for service down to liquid nitrogen temperatures (-320°F), though the specific minimum temperature rating should be confirmed with the seller.

What gases is it compatible with, and has it been oxygen cleaned?

The listing indicates 2.5 threaded nitrogen connections, suggesting nitrogen service, but does not specify what gas it was used for or its full compatibility range. Oxygen cleaning status is not mentioned. For oxygen service or other reactive gases, you must verify cleaning documentation and material compatibility with the seller, as cryogenic hoses can be rated for nitrogen, oxygen, argon, or LNG depending on construction and prior service.

What should I inspect before putting it into service?

Inspect the inner corrugated tube for cracks, pinholes, or erosion, especially near the end fittings where flexing concentrates stress. Check all four CL 150 flanges and threaded connections for damage, corrosion, or previous over-torquing, and verify the outer jacket has no cuts or excessive wear that would compromise the vacuum insulation if this is a vacuum-jacketed design. Pressure test and consider a leak test with the intended cryogen, as thermal cycling can reveal leaks not apparent at ambient temperature.