Zhejiang, China
Business Type:
Manufacturer/Factory & Trading Company
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Peak season lead time: one month
Off season lead time: one month
OEM/ODM Service

Asme B16.20 Swg, Asme B16.47 Spiral Wound Gasket, Swg manufacturer / supplier in China, offering Spiral Wound Gasket (SWG) Asme B16.20 16.47, Asbestos Packing, EPDM Sheet (RS-5038) and so on.

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Spiral Wound Gasket (SWG) Asme B16.20 16.47

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Min. Order: 50 Pieces
Production Capacity: 200, 000 PCS Per Week
Transport Package: Wooden Case, Plastic Film, Carton Box
Payment Terms: L/C, T/T
Material: 316L, 304, Graphite, PTFE
Shape: O-Ring
Standard: Standard, as Requested
Specification: ASME, BS, JIS and EN(DIN) standards and others
Trademark: RILSON
Origin: China, Zhejiang

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Basic Info

Model NO.: RS1-CGI
HS Code: 84841000

Product Description

Available in a full range of styles and materials, our spiral wound gaskets are manufactured in accordance with ASME B16.20 for use in all industry flanges, including ASME/ANSI B16.5, ASME B 16.47, Series A & B. American Seal & Packing assures strict adherence to these specifications as routine inspection procedures are applied throughout the manufacturing process. In addition, we maintain trace ability of all materials used in our gasket construction to provide material certifications as required.

Normal Pressure: from 150# to 2500#
Normal Diameter: from  1/2'' to 60''

Usage: Flat and raised faced diameter flanges up to and inclusive of Class 2500.
Technical Benefits: >Metallic winding suited for cyclic loading
                                     >Outer ring center gasket
                                     >Inner/outer ring provides additional blow-out strength
                                     >Inner/outer ring provides a compression stop
                                     >Prevents flange erosion
                                     >Prevents inward buckling
                                     >Reduces turbulent flow
                                     >Recommended for high pressure/temperature applications

Applicable Standards: >ASME B16.20
                                           >BS, JIS,DIN
                                           >Suited for ASME B16.47 series A/B flanges

Metallic Strip
The standard thickness of the metallic strip is 0.2 mm.

Filler is normally used for thickness from  0.5 mm to 0.6 mm.
- Flexible graphite 
- Ceramic
- Asbestos

Centering ring
The centering ring does not come into direct contact with contained fluid. It is normally made of carbon steel and electro plated or painted to avoid corrosion. Other materials are available on request.

Inner ring
Inner ring is used to avoid excessive compression due to high seating stress in high-pressure service and it is also used to reduce turbulence in the flange area. It is normally made of the same material as the gasket metallic srtip.

Manufaturing sizes
This limitations are general and can vary according to the special customer.


The standard manufacturing thickness for spiral wound gaskets are: 3.2 mm; 4.5 mm; 6.5 mm (measured across metallic strip not including the filler, which protrudes slightly beyond the metal).

Manufacturing tolerances
The tolerance of the gasket diameters (d1, d2, d3, d4, s, s1) are stipulated by ASME B 16.20 and  DIN 2632-2638 standards. The gaskets designed for non-standard flanges meet the recommendations by the ASME B 16.20.

The dimensions of the standard SWG meet the ASME, BS and EN (DIN) standards.

Spiral Wound Gasket (SWG) Asme B16.20 16.47
Style CG - Utilizes an external ring which accurately centers gasket on flange face, provides additional radial strength to prevent gasket blow-out and acts as a compression stop. A general purpose gasket suitable for use with flat face and raised face flanges up to and inclusive of class 2500. See note at bottom of page 8 for inner ring requirements.
Spiral Wound Gasket (SWG) Asme B16.20 16.47
Style CGI - A Style CG gasket fitted with internal ring which gives an additional compression limiting stop and provides heat and corrosion barrier protecting gasket windings and preventing flange erosion. Suitable for use with flat face and raised face flanges. See note at bottom of page 8 for inner ring requirements. 
Spiral Wound Gasket (SWG) Asme B16.20 16.47
Style R - Basic construction type. Inner and outer diameters are reinforced with several plies of metal without filler to give greater stability and better compression and sealing characteristics. Suitable for tongue and groove or male and female or grooved to flat face flange assemblies.

Production Flow

All is for better life!

Metal Winding Strip Materials

Stainless Steel 316L
Stainless Steel 304 
Stainless Steel 309 
Stainless Steel 310 
Stainless Steel 316Ti 
Stainless Steel 321 
Stainless Steel 347 
Monel 400 
Nickel 200 
Inconel 600 
Inronel 625 
Inconel X750 
Incoloy 800 
Incoloy 825 
Hastalloy B2 
Hastalloy C276 
Filler Materials  

Treated Asbestos Fiber
Non-Asbestos Fiber
Outer Ring Materials

Carbon Steel
Stainless Steel 304
Stainless Steel 316L
Stainless Steel 316Ti
Stainless Steel 321
Stainless Steel 347
Stainless Steel 4l0
Monel 400
Nickel 200
Inconel 600
Incoloy 800
Inroloy 825
Hastalloy B2
Hastalloy C276
Alloy 20

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