Sprial Wound Gasket
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Sprial Wound Gasket (SPW)
The Spiral Wound Gasket come in a number of different styles which offer outstanding sealing capabilities with in flanges. SPW is in accordance with gasket standard to suit the flange destinations. The ASME B16.20 gaskets were designed for use ni ASME B16.50 flange or ASME 16.47


TYPE OF SPIRAL WOUND GASKETS


SPW with Outer and Inner ring
(SPW OR+IR)
Consisting of sealing element and solid outer ring (Centering ring) and inner ring, both giving additional rigidity ot the gasket sealing element, proventing buckling and blowout as wel as a pressure limit ot avoid over compresion on application.		 SPW with Outer ring
(SPW with OR)
Consisting of sealing element and solid outer ring (Centering ring) which provide a radial support ot prevent blowout as wel as a pressure stop to avoid over compression of the gaskets.


SPW with Inner ring
(SPW with IR)
Consist of sealing element and sollid metal inner ring. The solid ring provides an inner radial support ot prevent buckling as wel as limit ot avoid over compression of the gasket.		 SPW winding only
(Winding Only)
Produced from a formed Spiral wound metallic strip, with a layer of filer material without outer ring and inner ring. (known as the winding)



CENTERING RING

It dose not touch directly with contained fluid, therefore it can be of several material but the normally standard is carbon steel zinc plate.

In extremely aggressive services, it can be made of the same material as the metal strip such as stainless steel sus304, sus316L etc.



INNER RING

As mentioned before, it is used to avoid an over compression. It is also used to reduce turbulence in the flange area and avoid corrosion or erosion of winding.

Usually, the ring thickness is less than the gasket thickness.
Gasket thickness = 4.5 mm >> Ring thickness = 3.2 mm
Gasket thickness = 3.2 mm >> Ring thickness = 2.7 mm

Metal Material Temp (C)
min.		 Temp (C)
max.
Silver 		Carbon Steel (CS) -40 540
Yellow 		SS 304 -195 760
Green 		SS 316L -100 760
GASKETS SEAL

The Metallic Strip has a standardized thickness of 0.008 in (0.2 mm). The width according to the thickness of gasket seal (t= 4.5 mm, t=3.2 mm etc.)

The filler material provides the sealability of the gasket. It recommended that the edge of the filler be flush with or above the metal strip. It shold never be below it.

Filter Material Temp (C)
min.		 Temp (C)
max.
Grey 		Flexible Graphite -200 550
White 		TPFE -200 260
Pink 		Non-Asbestos -100 250
PROCESS

Our machines can make the gasket under properly construction (winding and welding process).

standard thickness for gaskets 3.2mm, 4.5mm both are available.

Manufacture
Gasket
(mm)		 Thickness
after Seating
(mm)
3.2 2.3 - 2.5
4.5 3.2 - 3.4
GASKETS FOR BOILER

This gaskets are windings in the circular and non-circular shape such as Oval, Oblong, Rectangular, Square with round corners, Diamond or Pear shapes. It normally used in Boiler, Handholes and Manholds and Exhaust system.
HOW TO ORDER

The dimension of these gaskets are verified by:

ID = Inside Diameter (mm)
ID1 = Inside Diameter 1st (mm)
ID2 = Inside Diameter 2nd (mm)
R = Radius (mm)
W = Width (mm)

Even not being standardized some the gaskets are considered standard in the industry such as

Shape ID1 ID2 W
S Oval 220 320 25
M Oval 300 400 25
L Oval 320 420 25
Unit in mm.



HOW TO ORDER




Note:

In case of Winding Only Round and the other shape. In case of Non-Standard SPW with inner and outer ring D1, D2, D3 and D4 must be determined.
DIMENSION FOR SPIRAL WOUND GASKET

Dimension and tolerances for Gasket, Centering Ring, Inner Ring shell be in accordance with the Table
DEFINITION

ID1 = Inside Diameter of Inner-Ring (mm)
ID2 = Inside Diameter of Gakset (mm)
ID3 = Outside Diameter of Gasket (mm)
D4 = Outside Diameter of Centering-Ring (mm)
Standard Flanges may cocerned:
ASME B16.5
ASME B16.47 SERIES A ( MSS SP44)
ASME B16.47 SERIES B (API 605)
DIN Flange, JIS Flange
DIMENSION for spiral gasket use with ASME B16.5 flange

Table 1: Dimension for Gasket by Class 150

Flange
Size
(NPS)		 Inside Diameter
of Inner-Ring
(D1)		 Outside Diameter
of Gasket
(D2)		 Inside Diameter
of Gasket
(D3)		 Outside Diameter
of Centering Ring
(D4)
1/2" 14.2 19.1 31.8 47.8
3/4" 20.6 25.4 39.6 57.2
1" 26.9 31.8 47.8 66.8
1-1/4" 38.1 47.8 60.5 76.2
1-1/2" 44.5 54.1 69.9 85.9
2" 55.6 69.9 85.9 104.9
2-1/2" 66.5 82.6 98.6 124.0
3" 81.0 101.6 120.7 136.7
4" 106.4 127.0 149.4 174.8
5" 131.8 155.7 177.8 196.9
6" 157.2 182.6 209.6 222.3
8" 215.9 233.4 263.7 279.4
10" 268.2 287.3 317.5 339.9
12" 317.5 339.9 374.7 409.7
14" 349.3 371.6 406.4 450.9
16" 400.1 422.4 463.6 514.4
18" 449.3 474.7 527.1 549.9
20" 500.1 525.5 577.9 606.6
24" 603.3 628.7 685.8 717.6
Note:
  1. Refer to ASME standard ASME B16.20-2007 (Revision of ASME B16.20-1998)
  2. The gasket outside, inside Diameter tolerance are according to ASME standard.
  3. Al dimensions are in millimeters

Table 1: Dimension for Gasket by Class 300

Flange
Size
(NPS)		 Inside Diameter
of Inner-Ring
(D1)		 Outside Diameter
of Gasket
(D2)		 Inside Diameter
of Gasket
(D3)		 Outside Diameter
of Centering Ring
(D4)
1/2" 14.2 19.1 31.8 54.1
3/4" 20.6 25.4 39.6 66.8
1" 26.9 31.8 47.8 73.2
1-1/4" 38.1 47.8 60.5 82.6
1-1/2" 44.5 54.1 69.9 95.3
2" 55.6 69.9 85.9 111.3
2-1/2" 66.5 82.6 98.6 130.3
3" 81.0 101.6 120.7 149.4
4" 106.4 127.0 149.4 181.1
5" 131.8 155.7 177.8 215.9
6" 157.2 182.6 209.6 251.0
8" 215.9 233.4 263.7 308.1
10" 268.2 287.3 317.5 362.0
12" 317.5 339.9 374.7 422.4
14" 349.3 371.6 406.4 485.9
16" 400.1 422.4 463.6 539.8
18" 449.3 474.7 527.1 596.9
20" 500.1 525.5 577.9 654.1
24" 603.3 628.7 685.8 774.7
Note:
  1. Refer to ASME standard ASME B16.20-2007 (Revision of ASME B16.20-1998)
  2. The gasket outside, inside Diameter tolerance are according to ASME standard.
  3. Al dimensions are in millimeters

Table 1: Dimension for Gasket by Class 600

Flange
Size
(NPS)		 Inside Diameter
of Inner-Ring
(D1)		 Outside Diameter
of Gasket
(D2)		 Inside Diameter
of Gasket
(D3)		 Outside Diameter
of Centering Ring
(D4)
1/2" 14.2 19.1 31.8 54.1
3/4" 20.6 25.4 39.6 66.8
1" 26.9 31.8 47.8 73.2
1-1/4" 38.1 47.8 60.5 82.6
1-1/2" 44.5 54.1 69.9 95.3
2" 55.6 69.9 85.9 111.3
2-1/2" 66.5 82.6 98.6 130.3
3" 81.0 101.6 120.7 149.4
4" 102.6 120.7 149.4 193.8
5" 128.3 147.6 177.8 241.3
6" 154.9 174.8 209.6 266.7
8" 205.7 225.6 263.7 320.8
10" 255.3 274.6 317.5 400.1
12" 307.3 327.2 374.7 457.2
14" 342.9 362.0 406.4 492.3
16" 389.9 412.8 463.6 565.2
18" 438.2 469.9 527.1 612.9
20" 489.0 520.7 577.9 682.8
24" 590.6 628.7 685.8 790.7
Note:
  1. Refer to ASME standard ASME B16.20-2007 (Revision of ASME B16.20-1998)
  2. The gasket outside, inside Diameter tolerance are according to ASME standard.
  3. Al dimensions are in millimeters