ASA 150 Spiral Wound Gasket – Carbon Steel Inner Ring
Built for the demanding realities of industrial piping, the ASA 150 Spiral Wound Gasket with Carbon Steel Inner Ring delivers reliable sealing performance where it matters most high-temperature steam lines, volatile chemical processes, and high-pressure oil and gas systems.
At its core, the gasket's alternating layers of pre-formed metal and flexible graphite filler work in tandem to absorb pressure fluctuations and thermal expansion. When flange faces aren't perfectly smooth, the soft filler conforms to minor surface irregularities, closing off potential leak paths that a rigid gasket would miss. The result is a consistently tight seal, even as operating conditions shift throughout the day.
Two structural elements take the gasket's reliability further. The outer centering ring positions the gasket precisely within the bolt circle and distributes bolt load evenly, preventing over-compression that can compromise the seal. Meanwhile, the carbon steel inner ring reinforces the winding structure from the inside out—stopping the metal layers from buckling inward under pressure while shielding the filler material from erosive or corrosive fluid flow.
Dimensioned to ASME B16.5 / ANSI B16.20 standards for Class 150 raised-face and flat-face flanges, this gasket integrates directly into existing piping systems without modification.
Summary:
- Used to seal raised-face and flat-face pipe flanges
- Handles medium pressure (Class 150) and high temperatures, preventing leaks in demanding industrial piping systems
- Designed for Class 150 pressure systems (matching ASME B16.5 / ANSI B16.20 flange dimensions)
- Alternating layers of pre-formed metal and soft filler (commonly flexible graphite)
- It flexes to handle temperature changes and pressure swings while filling small flaws on the flange face
- The outer ring centers the gasket inside the bolt circle and stops it from crushing under heavy bolt pressure
- The inner ring stops the metal windings from buckling inward and protects the filler from corrosive or high-speed fluids
Applications:
Commonly used in;
- Oil & gas refineries and processing units
- Chemical plants, handling volatile or hazardous chemicals
- Power generation, steam lines, boilers, and turbine systems
