HIGH PRESSURE INDUSTRIAL GAS TRANSFER STAINLESS STEEL HOSE WITH PRESSURE GAUGE (CO2)

That specific item is a Stainless Steel Flexible Pigtail or High-Pressure Transfer Hose Assembly used to connect a Carbon Dioxide ($text{CO}_2$) cylinder to a fixed regulator or a manifold system. The integrated pressure gauge is essential for monitoring the cylinder's state.

This assembly is used in various industrial applications, including welding, fire suppression systems, and beverage carbonation, where the $text{CO}_2$ is stored at high pressure.

Key Specifications for the $text{CO}_2$ Hose Assembly

1. Pressure Rating (Crucial)

Unlike gases stored only as compressed gas (like Argon or Oxygen), $text{CO}_2$ is typically stored as a liquid at ambient temperature. The pressure in the cylinder is dependent on the temperature, not the amount of gas remaining, until the liquid is depleted.

• Cylinder Pressure: At room temperature ($approx 21^circtext{C}$ or $70^circtext{F}$), the cylinder pressure is approximately 830 PSI ($approx 57$ bar).

• Hose Working Pressure: For industrial applications, these stainless steel hoses are generally rated for pressures much higher than the cylinder pressure, typically:

  • $mathbf{200 text{ Bar}}$ ($mathbf{2,900 text{ PSI}}$)

  • Some heavy-duty versions are rated for $mathbf{300 text{ Bar}}$ ($mathbf{4,350 text{ PSI}}$).

2. Design and Materials

• Hose Core: The core is typically a corrugated stainless steel tube (e.g., $text{SS } 316$ or $321$) or a PTFE (Teflon) core. Stainless steel is often preferred as it resists the formation of carbonic acid (from $text{CO}_2$ and moisture), which can degrade carbon steel or certain rubbers.

• Reinforcement: An external stainless steel braid ($text{SS } 304$) provides high burst pressure resistance and protection against abrasion and kinking.

• Fittings: The fittings will be the standard connection for $text{CO}_2$ cylinders in your region (e.g., CGA 320 in the US, or W21.8 in Europe/Asia). These are typically Right-Hand (RH) threads.

• Gauge: The pressure gauge is fitted near the cylinder connection and is often marked with a maximum reading that matches or exceeds the hose's rating (e.g., 0-300 bar or 0-4000 PSI).

3. Purpose of the Gauge

The pressure gauge on the pigtail serves two main purposes:

1. Supply Monitoring (Gas Phase): Once the liquid $text{CO}_2$ has been completely vaporized, the pressure will drop rapidly, indicating that the cylinder is almost empty.

2. Manifold Pressure: In a manifold system, it allows technicians to read the pressure of each individual cylinder feeding the system