Spiral Wound Gasket 316L /316L/FG SWG RIR IR type(Inner ring)

China Manufacturer of Spiral Wound Gasket 316L /316L/FG SWG RIR type SWG.

Spiral Wound Gaskets (SWG) are widely used as high integrity and sustainable gaskets. We offer a complete range of spiral wound gaskets, Standard and non-standard spiral wound gasket and spiral wound gasket material . SWG can be made from a large selection of alloys and filler materials in a variety of shapes and sizes.

Spiral wound gasket comprise a mix of metallic and filler material. Generally, the gasket has a metal (normally stainless steel) wound outwards in a circular spiral (other shapes are possible) with the filler material (generally a flexible graphite) wound in the same manner but starting from the opposing side. This results in alternating layers of filler and metal. The filler material in these gaskets acts as the sealing element, with the metal providing structural support.Spiral wound gaskets are designed for ASME ,DIN,JIS flanges.There are usually 4 types of spiral wound gasket ,R/IR/CG/CGI.

Style RIR – Is comprised of a sealing element and inner metal ring.
The inner ring functions as both a compression stop and creates a physical barrier between the sealing element and media stream. The innerring is also designed to reduceturbulent flow, minimising flange erosion and prevents the build up debris in the annular space between the pipe bore and internal diameter of the gasket. Style RIR gaskets are suitable for use on male and female (spigot and recess) flanged connections.

RIR Type Spiral Wound Gasket:
SWG with only inner ring,  for  male  / female   flange. 

IR Inner Ring Type
Solid inner metal ring acts as a compression stopper. To prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion, damages of gasket between flange bore and the inside diameter, the annular space is filled up by solid inner metal ring. – Suitable for male and female pipe flanges.

Spiral Wound Gaskets Materials:

• Gasket Hoop

Inner and outer Ring Material

SWG Inner and Outer Ring Material: Carbon Steel, 304(L), 316(L), 321, 317, 31803, Monel, Ti, Ni, INC825, INC625, Hast.C/B etc.

• Gasket Filler

How to choose Filler for Spiral Wound Gaskets

The main sealing part is filler which is made up of SS strip and non- metallic filling tape,  the  material can be changed  according to different chemical compatibility requirements, 
Graphite filling strip is supposed to used in high temperature environment,  
PTFE filling  strip is for acids and other corrosive mediums 
Non – asbestos   its use increased when the health problems with asbestos became  known. Only  recommend  for low temperature less severe applications due to the rubber content . 
Ceramic is in extremely high temperature applications.The filler is not so common as it cannot achieve the same leak tightness as graphite  

Common Standards for Spiral Wound Gaskets

• ASME B16.20: Specifications for metal gaskets for pipe flanges.
• EN 1514-2: European standard for spiral wound gaskets.
• API 601: Standards for gaskets in refinery applications.

SWG RIR IR type(Inner ring) struture reference

SWG Inquiry Example for refernece.

Metal Spiral Wound Gasket Enquiry