SPIRAL WOUND GASKETS

  • Spiral wound gaskets consist of a metal strip with a “V” profile rolled up into a spiral shape and with a soft material filling.
  • The soft material makes the spiral wound gasket waterproof and the metal strip makes it rigid.
  • The combination of these two materials makes spiral wound gaskets the ideal product for sealing high temperature fluids (up to 1,000ºC) and at high pressure (up to 250 bar)
CGI SPIRAL WOUND GASKET

CGI Spiral Wound Gasket (with an inner ring)

Types of Spiral Wound Gaskets

  • Type R: soft material (WITHOUT metal strip)
  • Type IR: soft material + interior metal strip
  • Type CG: soft material + exterior metal strip
  • Type CGI: interior metal strip + soft material + exterior metal strip.

The exterior metal strip is usually carbon steel and its function is to centralize the flange.

The interior ring helps to avoid internal tension. As it is in contact with the fluid, it must be made of the same material as the spiral strip and compatible with the fluid.

For the filling material, we recommend the use of graphite for temperatures ranging from 550ºC to -200ºC in most cases.

Types of Spiral Wound Gaskets

Materials for Spiral wound Gaskets

  • For the Strip and the rings:
    • Carbon Steel
    • Stainless steel: 304, 304L, 316L, 316Ti, 321, etc.
    • Others: Aluminium, Silver, Copper, Titanium, Nickel, Monel, Inconel, etc.
  • For the Filling:
    • Graphite
    • PTFE
    • Asbestos free fiber

Spiral Wound Gasket Manufacturing Norms

  • API 601
  • ASME B16.20
  • DIN. 2690, 2691, 2692, standard SPW1
  • BS 3381

Spiral Wound Gasket Measurements

  • API 605
  • ASME B16.15, ASME B16.47
  • DIN 2513, DIN2512
  • BS 1560

We can make spiral wound gaskets to specification, following the client’s indications: rings, ovals, etc. to specification.