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Our spiral wound gasket widely use in oil and gasket industrial ,chemical industrial, mining industrial ,power station and most industrial factory?The main standard of spiral wound gasket is ASME B16.20?THE SIZE AS BELOW:ASME B16.20 150LB 300LB 600LB NPS D1D2D3D4NPS D1D2D3D4 NPS D1D2D3D41/2? 14.219.131.847.81/2? 14.219.131.854.1 1/2? 14.219.131.854.13/4? 20.625.439.657.23/4? 20.625.439.666.8 3/4? 20.625.439.666.81? 26.931.847.866.81? 26.931.847.873.2 1? 26.931.847.873.21-1/4" 38.147.860.576.21-1/4" 38.147.860.582.6 1-1/4" 38.147.860.582.61-1/2? 44.554.169.985.91-1/2? 44.554.169.995.3 1-1/2? 44.554.169.995.32? 55.669.985.9104.92? 55.669.985.9111.3 2? 55.669.985.9111.32-1/2? 66.582.698.6124.02-1/2? 66.582.698.6130.3 2-1/2? 66.582.698.6130.33? 81.0101.6120.7136.73? 81.0101.6120.7149.4 3? 78.7101.6120.7149.44? 106.4127.0149.4174.84? 106.4127.0149.4181.1 4? 102.6120.7149.4193.85? 131.8155.7177.6196.95? 131.6155.7177.8215.9 5? 128.3147.6177.8241.36? 157.2182.6209.6222.36? 157.2182.6209.6251.0 6? 154.8174.8209.6266.78? 215.9233.4263.7279.48? 215.9233.4263.7308.1 8? 205.7225.6263.7320.810? 268.2287.3317.5339.910? 268.2287.3317.5362.0 10? 255.3274.6317.5400.112? 317.5339.9374.7409.712? 317.5339.9374.7422.4 12? 307.3327.2374.7457.214? 349.3371.6406.4450.914? 349.3371.6406.4485.9 14? 342.9362.0406.4492.316? 400.1422.4463.6514.416? 400.1422.4463.6539.6 16? 389.9412.8463.6565.218? 449.3474.7527.1549.418? 449.3474.7527.1596.9 18? 438.2469.9527.1612.920? 500.1525.5577.8606.620? 500.1525.5577.9654.1 20? 489.0520.7577.9682.824? 603.3628.7685.8717.624? 603.3628.7685.8774.7 24? 590.6626.7685.8790.7 900LB 1500LB 2500LB NPS D1D2D3D4 NPS D1D2D3D4NPS D1 D2 D3 D4 1/2? 14.219.131.863.5 1/2? 14.219.131.863.51/2? 14.219.131.869.93/4? 20.625.439.669.9 3/4? 20.625.439.669.93/4? 20.625.439.676.21? 26.931.847.879.5 1? 26.931.847.879.51? 26.931.847.885.91-1/4" 33.339.660.588.9 1-1/4" 33.339.660.588.91-1/4" 33.339.660.5104.91-1/2? 41.447.869.998.6 1-1/2? 41.447.869.998.61-1/2? 41.447.869.9117.62? 52.358.785.9143.0 2? 52.358.785.9143.02? 52.358.785.9146.12-1/2? 63.569.998.6165.1 2-1/2? 63.569.998.6165.12-1/2? 63.569.998.6168.43? 78.795.3120.7168.4 3? 78.792.2120.7174.83? 78.792.2120.7196.94? 102.6120.7149.4206.5 4? 97.8117.6149.4209.64? 97.8117.6149.4235.05? 128.3147.6177.8247.7 5? 124.5143.0177.8254.05? 124.5143.0177.8279.46? 154.9174.8209.6289.1 6? 147.3171.5209.6282.76? 147.3171.5209.6317.58? 196.9222.3257.3358.9 8? 196.9215.9257.3352.68? 196.9215.9257.3387.410? 246.1276.4311.2435.1 10? 246.1266.7311.2435.110? 246.1270.0311.2476.312? 292.1323.9368.3498.6 12? 292.1323.9368.3520.712? 292.1317.5368.3549.414? 320.8355.6400.1520.7 14? 320.8362.0400.1577.914? 294.636240057616? 374.7412.8457.2574.8 16? 368.3406.4457.2641.416? 18? 425.5463.6520.7638.3 18? 425.5463.6520.7704.918? 20? 482.6520.7571.5698.5 20? 476.3514.4571.5755.720? 24? 590.6628.7679.5838.2 24? 577.9616.0679.5901.724? ASME B16.20 150LB 300LB 600LB NPS D1D2D3D4NPS D1D2D3D4 NPS D1D2D3D41/2? 14.219.131.847.81/2? 14.219.131.854.1 1/2? 14.219.131.854.13/4? 20.625.439.657.23/4? 20.625.439.666.8 3/4? 20.625.439.666.81? 26.931.847.866.81? 26.931.847.873.2 1? 26.931.847.873.21-1/4" 38.147.860.576.21-1/4" 38.147.860.582.6 1-1/4" 38.147.860.582.61-1/2? 44.554.169.985.91-1/2? 44.554.169.995.3 1-1/2? 44.554.169.995.32? 55.669.985.9104.92? 55.669.985.9111.3 2? 55.669.985.9111.32-1/2? 66.582.698.6124.02-1/2? 66.582.698.6130.3 2-1/2? 66.582.698.6130.33? 81.0101.6120.7136.73? 81.0101.6120.7149.4 3? 78.7101.6120.7149.44? 106.4127.0149.4174.84? 106.4127.0149.4181.1 4? 102.6120.7149.4193.85? 131.8155.7177.6196.95? 131.6155.7177.8215.9 5? 128.3147.6177.8241.36? 157.2182.6209.6222.36? 157.2182.6209.6251.0 6? 154.8174.8209.6266.78? 215.9233.4263.7279.48? 215.9233.4263.7308.1 8? 205.7225.6263.7320.810? 268.2287.3317.5339.910? 268.2287.3317.5362.0 10? 255.3274.6317.5400.112? 317.5339.9374.7409.712? 317.5339.9374.7422.4 12? 307.3327.2374.7457.214? 349.3371.6406.4450.914? 349.3371.6406.4485.9 14? 342.9362.0406.4492.316? 400.1422.4463.6514.416? 400.1422.4463.6539.6 16? 389.9412.8463.6565.218? 449.3474.7527.1549.418? 449.3474.7527.1596.9 18? 438.2469.9527.1612.920? 500.1525.5577.8606.620? 500.1525.5577.9654.1 20? 489.0520.7577.9682.824? 603.3628.7685.8717.624? 603.3628.7685.8774.7 24? 590.6626.7685.8790.7 900LB 1500LB 2500LB NPS D1D2D3D4NPS D1D2D3D4NPS D1 D2 D3 D4 1/2? 14.219.131.863.51/2? 14.219.131.863.51/2? 14.219.131.869.93/4? 20.625.439.669.93/4? 20.625.439.669.93/4? 20.625.439.676.21? 26.931.847.879.51? 26.931.847.879.51? 26.931.847.885.91-1/4" 33.339.660.588.91-1/4" 33.339.660.588.91-1/4" 33.339.660.5104.91-1/2? 41.447.869.998.61-1/2? 41.447.869.998.61-1/2? 41.447.869.9117.62? 52.358.785.9143.02? 52.358.785.9143.02? 52.358.785.9146.12-1/2? 63.569.998.6165.12-1/2? 63.569.998.6165.12-1/2? 63.569.998.6168.43? 78.795.3120.7168.43? 78.792.2120.7174.83? 78.792.2120.7196.94? 102.6120.7149.4206.54? 97.8117.6149.4209.64? 97.8117.6149.4235.05? 128.3147.6177.8247.75? 124.5143.0177.8254.05? 124.5143.0177.8279.46? 154.9174.8209.6289.16? 147.3171.5209.6282.76? 147.3171.5209.6317.58? 196.9222.3257.3358.98? 196.9215.9257.3352.68? 196.9215.9257.3387.410? 246.1276.4311.2435.110? 246.1266.7311.2435.110? 246.1270.0311.2476.312? 292.1323.9368.3498.612? 292.1323.9368.3520.712? 292.1317.5368.3549.414? 320.8355.6400.1520.714? 320.8362.0400.1577.914? 294.636240057616? 374.7412.8457.2574.816? 368.3406.4457.2641.416? 18? 425.5463.6520.7638.318? 425.5463.6520.7704.918? 20? 482.6520.7571.5698.520? 476.3514.4571.5755.720? 24? 590.6628.7679.5838.224? 577.9616.0679.5901.724? link:http://www.gasket-china.com/gasket/spiral-wound-gasket/asme-spiral-wound-gasket.html