Virgin PTFE Ring Gasket
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Virgin PTFE Ring Gasket

Ring gaskets are a flat sealing element, consisting of an inner and outer diameter sized to fit a flange's bore and bolt circle. Ring gaskets sit inside the flange's bolt circle. ASME B16.21 and ASME B16.47 govern the dimensions of ring gaskets for standard and large diameter pipe flanges. Skived virgin PTFE (polytetrafluoroethylene) is a high molecular weight polymer and one of the most versatile plastics known to man. Virgin PTFE sheet can handle virtually all chemicals in the 0-14 pH range with the exception of molten alkali metals and elemental fluorine. It is suitable for service at temperatures from the cryogenic range up to 500deg F. This style is particularly recommended for applications in the food and beverage industry where high purity materials are required. It is also used where contamination or discoloration of flow media cannot be tolerated. Virgin PTFE is harder, and less conforming than restructured or expanded PTFE.

 

Governing StandardsVirgin PTFE Ring Gasket

ASME B16.21 Covers types, sizes, materials, dimensions, tolerances, and markings for nonmetallic flat gaskets.
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.

Test ResultsVirgin PTFE Ring Gasket

Standard Sample Name Test Item Unit Test Results
ASTM
D3308-12
PTFE Sheet Tensile Strength MPa 21.0
Elongation at Break % 207
Dielectric Constant (1MHz) / 17.6
Melting Point Celsius First heating section: 332.6
Second heating section: 330.8
Density (23 Degrees Celsius) kg/m^3 2.17 x 10^3
  1. Data included in table above is representative of an actual testing sample.

Dimensional SpecificationsVirgin PTFE Ring Gasket

Per ASME B16.21-2016
  Pipe Diameter
1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 24
Inside Diameter 0.84 1.06 1.31 1.66 2.38 2.38 2.88 3.50 4.00 4.50 5.56 6.63 8.63 10.75 12.75 14.00 16.00 18.00 20.00 24.00
Outside
Diameter
per Class
150# 1.88 2.25 2.62 3.00 3.38 4.12 4.88 5.38 6.38 6.88 7.75 8.75 11.00 13.38 16.13 17.75 20.25 21.62 23.88 28.25
300# 2.12 2.62 2.88 3.25 3.75 4.38 5.12 5.88 6.50 7.12 8.50 9.88 12.12 14.25 16.62 19.12 21.25 23.50 25.75 30.50
600# 2.12 2.62 2.88 3.25 3.75 4.38 5.12 5.88 6.38 7.62 9.50 10.50 12.62 15.75 18.00 19.38 22.25 24.12 26.88 31.12
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
Inside Diameter 26.00 28.00 30.00 32.00 34.00 36.00 38.00 40.00 42.00 44.00 46.00 48.00 50.00 52.00 54.00 56.00 58.00 60.00
Outside
Diameter
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 39.62 41.62 44.00 41.50 43.88 45.88 48.00 50.12 52.12 54.25 56.25 58.75 60.75 62.75 64.75
600# 34.12 36.00 38.25 40.25 42.25 44.50 43.50 45.50 48.00 50.00 52.26 54.75 57.00 59.00 61.25 63.50 65.50 67.75
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
Inside Diameter 26.00 28.00 30.00 32.00 34.00 36.00 38.00 40.00 42.00 44.00 46.00 48.00 50.00 52.00 54.00 56.00 58.00 60.00
Outside
Diameter
per Class
150# 28.56 30.56 32.56 34.69 36.81 38.88 41.12 43.12 45.12 47.12 49.44 51.44 53.44 55.44 57.62 59.62 62.19 64.19
300# 30.38 32.50 34.88 37.00 39.12 41.25 43.25 45.25 47.25 49.25 51.88 53.88 55.88 57.88 61.25 62.75 65.19 67.12
600# 30.12 32.25 34.62 36.75 39.25 41.25                        
  1. All dimensions are in inches.
Virgin PTFE Ring Gasket
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Pipe Diameter Flange Rating Series Thickness Item # Availability Price Quantity UOM
1/2 150# - 1/16 GF1500-1500050 1-3 Working Days $3.69638/EA EA
1/2 300#, 400#, 600# - 1/16 GR1500-3460050 1-3 Working Days $1.36257/EA EA
3/4 150# - 1/16 GR1500-1500075 1-3 Working Days $1.52759/EA EA
3/4 300#, 400#, 600# - 1/16 GR1500-3460075 1-3 Working Days $2.07922/EA EA
1 150# - 1/16 GR1500-1500100 1-3 Working Days $2.07922/EA EA
1 300#, 400#, 600# - 1/16 GR1500-3460100 1-3 Working Days $2.49412/EA EA
1 1/4 150# - 1/16 GR1500-1500125 1-3 Working Days $2.71571/EA EA
1 1/4 300#, 400#, 600# - 1/16 GR1500-3460125 1-3 Working Days $3.18719/EA EA
1 1/2 150# - 1/16 GR1500-1500150 1-3 Working Days $3.43707/EA EA
1 1/2 300#, 400#, 600# - 1/16 GR1500-3460150 1-3 Working Days $4.2433/EA EA
2 150# - 1/16 GR1500-1500200 1-3 Working Days $5.13439/EA EA
2 300#, 400#, 600# - 1/16 GR1500-3460200 1-3 Working Days $5.7756/EA EA
2 1/2 150# - 1/16 GR1500-1500250 1-3 Working Days $7.17118/EA EA
2 1/2 300#, 400#, 600# - 1/16 GR1500-3460250 1-3 Working Days $7.92554/EA EA
3 150# - 1/16 GR1500-1500300 1-3 Working Days $5.02124/EA EA
3 300#, 400#, 600# - 1/16 GR1500-3460300 1-3 Working Days $6.71856/EA EA
3 1/2 150# - 1/16 GR1500-1500350 1-3 Working Days $7.4352/EA EA
4 150# - 1/16 GR1500-1500400 1-3 Working Days $8.15185/EA EA
4 300# - 1/16 GR1500-3000400 1-3 Working Days $9.20796/EA EA
5 150# - 1/16 GR1500-1500500 1-3 Working Days $8.78717/EA EA
5 300# - 1/16 GR1500-3000500 1-3 Working Days $12.46469/EA EA
6 150# - 1/16 GR1500-1500600 In Stock $9.8586/EA EA
6 300# - 1/16 GR1500-3000600 1-3 Working Days $16.18111/EA EA
8 150# - 1/16 GR1500-1500800 In Stock $14.06418/EA EA
8 300# - 1/16 GR1500-3000800 1-3 Working Days $21.91428/EA EA
10 150# - 1/16 GR1500-1501000 1-3 Working Days $19.10899/EA EA
10 300# - 1/16 GR1500-3001000 1-3 Working Days $26.40275/EA EA
12 150# - 1/16 GR1500-1501200 1-3 Working Days $29.40606/EA EA
12 300# - 1/16 GR1500-3001200 1-3 Working Days $34.34715/EA EA
14 150# - 1/16 GR1500-1501400 1-3 Working Days $35.9266/EA EA
14 300# - 1/16 GR1500-3001400 1-3 Working Days $51.22605/EA EA
16 150# - 1/16 GR1500-1501600 1-3 Working Days $46.4877/EA EA
16 300# - 1/16 GR1500-3001600 1-3 Working Days $59.01015/EA EA
18 150# - 1/16 GR1500-1501800 1-3 Working Days $43.34294/EA EA
18 300# - 1/16 GR1500-3001800 1-3 Working Days $68.87346/EA EA
20 150# - 1/16 GR1500-1502000 1-3 Working Days $51.30149/EA EA
20 300# - 1/16 GR1500-3002000 1-3 Working Days $79.37798/EA EA
24 150# - 1/16 GR1500-1502400 1-3 Working Days $67.00641/EA EA
24 300# - 1/16 GR1500-3002400 1-3 Working Days $106.89342/EA EA
1/2 150# - 1/8 GR1500-1500050-1/8 1-3 Working Days $1.99372/EA EA
1/2 300#, 400#, 600# - 1/8 GR1500-3460050-1/8 1-3 Working Days $2.56082/EA EA
3/4 150# - 1/8 GR1500-1500075-1/8 1-3 Working Days $2.87096/EA EA
3/4 300#, 400#, 600# - 1/8 GR1500-3460075-1/8 1-3 Working Days $3.90769/EA EA
1 150# - 1/8 GR1500-1500100-1/8 1-3 Working Days $3.90769/EA EA
1 300#, 400#, 600# - 1/8 GR1500-3460100-1/8 1-3 Working Days $4.68746/EA EA
1 1/4 150# - 1/8 GR1500-1500125-1/8 1-3 Working Days $5.10392/EA EA
1 1/4 300#, 400#, 600# - 1/8 GR1500-3460125-1/8 1-3 Working Days $5.99002/EA EA
1 1/2 150# - 1/8 GR1500-1500150-1/8 1-3 Working Days $6.45965/EA EA
1 1/2 300#, 400#, 600# - 1/8 GR1500-3460150-1/8 1-3 Working Days $7.97488/EA EA
2 150# - 1/8 GR1500-1500200-1/8 1-3 Working Days $9.6496/EA EA
2 300#, 400#, 600# - 1/8 GR1500-3460200-1/8 1-3 Working Days $10.85469/EA EA
2 1/2 150# - 1/8 GR1500-1500250-1/8 1-3 Working Days $13.47754/EA EA
2 1/2 300#, 400#, 600# - 1/8 GR1500-3460250-1/8 1-3 Working Days $14.8953/EA EA
3 150# - 1/8 GR1500-1500300-1/8 1-3 Working Days $9.43694/EA EA
3 300#, 400#, 600# - 1/8 GR1500-3460300-1/8 In Stock $12.62689/EA EA
3 1/2 150# - 1/8 GR1500-1500350-1/8 1-3 Working Days $13.97376/EA EA
4 150# - 1/8 GR1500-1500400-1/8 1-3 Working Days $15.32062/EA EA
4 300# - 1/8 GR1500-3000400-1/8 1-3 Working Days $17.30548/EA EA
5 150# - 1/8 GR1500-1500500-1/8 1-3 Working Days $16.51464/EA EA
5 300# - 1/8 GR1500-3000500-1/8 1-3 Working Days $23.4262/EA EA
6 150# - 1/8 GR1500-1500600-1/8 1-3 Working Days $18.5283/EA EA
6 300# - 1/8 GR1500-3000600-1/8 1-3 Working Days $30.41086/EA EA
8 150# - 1/8 GR1500-1500800-1/8 1-3 Working Days $26.43229/EA EA
8 300# - 1/8 GR1500-3000800-1/8 1-3 Working Days $41.18581/EA EA
10 150# - 1/8 GR1500-1501000-1/8 In Stock $35.91353/EA EA
10 300# - 1/8 GR1500-3001000-1/8 1-3 Working Days $49.62146/EA EA
12 150# - 1/8 GR1500-1501200-1/8 In Stock $55.2659/EA EA
12 300# - 1/8 GR1500-3001200-1/8 1-3 Working Days $64.5522/EA EA
14 150# - 1/8 GR1500-1501400-1/8 In Stock $67.52062/EA EA
14 300# - 1/8 GR1500-3001400-1/8 1-3 Working Days $96.27449/EA EA
16 150# - 1/8 GR1500-1501600-1/8 1-3 Working Days $87.36921/EA EA
16 300# - 1/8 GR1500-3001600-1/8 1-3 Working Days $110.90395/EA EA
18 150# - 1/8 GR1500-1501800-1/8 In Stock $81.45894/EA EA
18 300# - 1/8 GR1500-3001800-1/8 1-3 Working Days $129.44111/EA EA
20 150# - 1/8 GR1500-1502000-1/8 1-3 Working Days $96.41626/EA EA
20 300# - 1/8 GR1500-3002000-1/8 1-3 Working Days $149.18336/EA EA
24 150# - 1/8 GR1500-1502400-1/8 1-3 Working Days $125.93217/EA EA
24 300# - 1/8 GR1500-3002400-1/8 1-3 Working Days $200.89601/EA EA