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304 SS Spiral Wound FG, 304 SS IR, 304 SS OR

Selected Spiral Wound Gasker 304 Stainless Steel Inner Ring 304 Stainless Steel Outer Ring 304 Stainless Steel Centering Ring #150 Pound304 SS Spiral Wound FG, 304 SS IR, 304 SS OR
Spiral Wound Gasker 304 Stainless Steel Inner Ring 304 Stainless Steel Outer Ring 304 Stainless Steel Centering Ring #150 Pound304 SS Spiral Wound FG, 304 SS IR, 304 SS OR

Spiral wound gaskets listed below consist of a 304 stainless steel inner ring, 304 windings with flexible graphite filler, and a 304 outer ring. Spiral wound gaskets are metallic gaskets consisting of an outer centering ring (also known as OCR, OR, or an outer guide ring), metallic windings with a soft filler material, and a solid inner ring, or any combination of the three. These gaskets are manufactured to meet specifications as outlined in ASME B16.20 (previously covered by API 601). Spiral-wound gaskets can handle more harsh and varied operating conditions than non-asbestos sheet gaskets in general. They are available in multiple materials and configurations.

Products

Dimensional Specifications

Per ASME B16.20-2017
  Pipe Diameter
1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4 5 6 8 10 12 14 16 18 20 24
Inner Ring ID
per Class		 150# 0.56 0.81 1.06 1.50 1.75 2.19 2.62 3.19 4.19 5.19 6.19 8.50 10.56 12.50 13.75 15.75 17.69 19.69 23.75
300# 0.56 0.81 1.06 1.50 1.75 2.19 2.62 3.19 4.19 5.19 6.19 8.50 10.56 12.50 13.75 15.75 17.69 19.69 23.75
600# 0.56 0.81 1.06 1.50 1.75 2.19 2.62 3.19 4.04 5.05 6.10 8.10 10.05 12.10 13.50 15.35 17.25 19.25 23.25
900# 0.56 0.81 1.06 1.31 1.63 2.06 2.50 3.10 4.05 5.05 6.10 7.75 9.69 11.50 12.63 14.75 16.75 19.00 23.25
1500# 0.56 0.81 1.06 1.31 1.63 2.06 2.50 3.10 3.85 4.90 5.80 7.75 9.69 11.50 12.63 14.50 16.75 18.75 22.75
2500# 0.56 0.81 1.06 1.31 1.63 2.06 2.50 3.10 3.85 4.90 5.80 7.75 9.69 11.50          
Winding ID
per Class		 150# 0.75 1.00 1.25 1.88 2.13 2.75 3.25 4.00 5.00 6.13 7.19 9.19 11.31 13.38 14.63 16.63 18.69 20.69 24.75
300# 0.75 1.00 1.25 1.88 2.13 2.75 3.25 4.00 5.00 6.13 7.19 9.19 11.31 13.38 14.63 16.63 18.69 20.69 24.75
600# 0.75 1.00 1.25 1.88 2.13 2.75 3.25 4.00 4.75 5.81 6.88 8.88 10.81 12.88 14.25 16.25 18.50 20.50 24.75
900# 0.75 1.00 1.25 1.56 1.80 2.31 2.75 3.75 4.75 5.81 6.88 8.75 10.88 12.75 14.00 16.25 18.25 20.50 24.75
1500# 0.75 1.00 1.25 1.56 1.80 2.31 2.75 3.63 4.63 5.63 6.75 8.50 10.50 12.75 14.00 16.00 18.25 20.25 25.25
2500# 0.75 1.00 1.25 1.56 1.88 2.31 2.75 3.63 4.63 5.63 6.75 8.50 10.93 12.50          
Winding OD
per Class		 150# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.38 12.50 14.75 16.00 18.25 20.75 22.75 27.00
300# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.38 12.50 14.75 16.00 18.25 20.75 22.75 27.00
600# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.38 12.50 14.75 16.00 18.25 20.75 22.75 27.00
900# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.13 12.25 14.50 15.75 18.00 22.50 22.50 26.75
1500# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.13 12.25 14.50 15.75 18.00 22.50 22.50 26.75
2500# 1.25 1.56 1.88 2.38 2.75 3.38 3.88 4.75 5.88 7.00 8.25 10.13 12.25 14.50          
Outer Ring OD
per Class		 150# 1.88 2.25 2.63 3.00 3.38 4.13 4.88 5.38 6.88 7.75 8.75 11.00 13.38 16.13 17.75 20.25 21.63 23.88 28.25
300# 2.13 2.50 2.88 3.25 3.75 4.38 5.13 5.88 7.13 8.50 9.88 12.13 14.25 16.63 19.13 21.25 23.50 25.75 30.50
600# 2.13 2.50 2.88 3.25 3.75 4.38 5.13 5.88 7.63 9.50 10.50 12.63 15.75 18.00 19.38 22.25 24.13 26.88 31.13
900# 2.50 2.75 3.13 3.50 3.88 5.63 6.50 6.63 8.13 9.75 11.38 14.13 17.13 19.63 20.50 22.63 25.13 27.50 33.00
1500# 2.50 2.75 3.13 3.50 3.88 5.63 6.50 6.88 8.25 10.00 11.13 13.88 17.13 20.50 22.75 25.25 27.75 29.75 35.50
2500# 2.75 2.25 3.38 4.13 4.63 5.75 6.63 7.75 9.25 11.00 12.50 15.25 18.75 21.63          
Per ASME B16.47-2017
Series A Pipe Diameter
26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Inner Ring ID
per Class		 150# 25.75 27.75 29.75 31.75 33.75 35.75 37.75 39.75 41.75 43.75 45.75 47.75 49.75 51.75 53.50 55.50 57.50 59.50
300# 25.75 27.75 29.75 31.75 33.75 35.75 37.50 39.50 41.50 43.50 45.38 47.63 49.00 52.00 53.25 55.25 57.00 60.00
600# 25.50 27.50 29.75 32.00 34.00 36.13 37.50 39.75 42.00 43.75 45.75 48.00 50.00 52.00 54.25 56.25 58.00 60.25
900# 26.00 28.00 30.25 32.00 34.00 36.25 39.75 41.75 43.75 45.50 48.00 50.00            
Winding ID
per Class		 150# 26.50 28.50 30.50 32.50 34.50 36.50 38.50 40.50 42.50 44.50 46.50 48.50 50.50 52.50 54.50 56.50 58.50 60.50
300# 27.00 29.00 31.25 33.50 35.50 37.63 38.50 40.25 42.25 44.50 46.38 48.63 51.00 53.00 55.25 57.25 59.50 61.50
600# 27.00 29.00 31.25 33.50 35.50 37.63 39.00 41.25 43.50 45.75 47.75 50.00 52.00 54.00 56.25 58.25 60.50 62.75
900# 27.00 29.00 31.25 33.50 35.50 37.75 40.75 43.25 45.25 47.50 50.00 52.00            
Winding OD
per Class		 150# 27.75 29.75 31.75 33.88 35.88 38.13 40.13 42.13 44.25 46.38 48.38 50.38 52.50 54.50 56.50 58.50 60.50 62.50
300# 29.00 31.00 33.25 35.50 37.50 39.63 40.00 42.13 44.13 46.50 48.38 50.63 53.00 55.00 57.25 59.25 61.50 63.50
600# 29.00 31.00 33.25 35.50 37.50 39.63 41.00 43.25 45.50 47.75 49.75 52.00 54.00 56.00 58.25 60.25 62.50 64.75
900# 29.00 31.00 33.25 35.50 37.50 39.75 42.75 45.25 47.25 49.50 52.00 54.00            
Outer Ring OD
per Class		 150# 30.50 32.75 34.75 37.00 39.00 41.25 43.75 45.75 48.00 50.25 52.25 54.50 56.50 58.75 61.00 63.25 65.50 67.50
300# 32.88 35.38 37.50 39.63 41.63 44.00 41.50 43.88 45.88 48.00 50.13 52.13 54.25 56.25 58.75 60.75 62.75 64.75
600# 34.13 36.00 38.25 40.25 42.25 44.50 43.50 45.50 48.00 50.00 52.25 54.75 57.00 59.00 61.25 63.50 65.50 68.25
900# 34.75 37.25 39.75 42.25 44.75 47.25 47.25 49.25 51.25 53.88 56.50 58.50            
Per ASME   B16.47-2017
Series B Pipe Diameter
26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Inner Ring ID
per Class		 150# 25.75 27.75 29.75 31.75 33.75 35.75 37.75 39.75 41.75 43.75 45.75 47.75 49.75 51.75 53.75 56.00 58.19 60.44
300# 25.75 27.75 29.75 31.75 33.75 35.75 38.25 40.25 42

Color Codes

Spiral wound gaskets shall be marked with a color code that identifies the windings and filler materials. A continuous color around the outer edge of the centering ring shall identify the winding metal. The color identifying the filler material for NPS 1 1/2 and larger shall have four intermittent stripes spaced approximately 90 deg apart on the outer edge of the centering ring. Smaller size gaskets shall have a minimum of two stripes 180 deg apart. The colors shall conform to those listed in the table below.

Per ASME B16.20-2007
Metallic Winding Materials OD Color Code
Carbon Steel Silver
304 Stainless Steel Yellow
316L Stainless Steel Green
317L Stainless Steel Maroon
321 Stainless Steel Turquoise
347 Stainless Steel Blue
Monel 400 Orange
Nickel 200 Red
Titanium Purple
20Cb-3 Alloy Black
Hastelloy B Brown
Hastelloy C Beige
Inconel 600 Gold
Incoloy 800 White
Per ASME B16.20-2007
Nonmetallic Filler Materials Color Code
Polytetrafluoroethylene White Stripe
Mica-Graphite Pink Stripe
Flexible Graphite Gray Stripe
Ceramic Light Green Stripe

Governing Standards

ASME B16.20 Covers metal ring-joint gaskets, spiral-wound gaskets, metal-jacketed gaskets, and grooved metal gaskets with covering layers.
ASME B16.47 Covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class designations 75, 150, 300, 400, 600, and 900 with requirements given in both SI (Metric) and U. S. Customary units, with diameter of bolts and flange bolt hole expressed in inch units.

Spiral Wound Gasket with Inner Ring