API Ring Joint Gasket
Rring Joint gaskets come in two basic types, an oval cross section and an octagonal cross section .These basic shapes are used in pressures up to 10,000 psi. The dimensions are standardized and require specially grooved flanges. The octagonal cross section has a higher sealing efficiency than the oval and would be the preferred gasket. However, only the oval cross section can be used in the old type round bottom groove. The newer flat bottom groove design will accept either the oval or the octagonal cross section. The sealing surfaces on the ring joint grooves must be smoothly finished to 63 micro inches and to be free of objectionable ridges, tool or chatter marks. They seal by an initial line contact or a edging action as the compressive forces are applied.The hardness of the ring should always be less than the hardness of the flanges to prevent flange deformation. Dimensions for API ring joint gaskets and grooves are covered in ASME B16.20 and API6ALamons stocks a wide range of sizes and materials ready for immediate shipment from R11 to R105. Stock materials include large variety of metals.ModelsRing-joint gaskets, type R, dimensions according to ASME B16.20, API Std 6 A for flanges to ASME B16.5 and ASME B16.47, series ADimensions in mmNPSclassRing no.Ring dimensionsdmbhh13 3 3300 to 600 300 to 900 2500* R 30 * R 31 R 32117,47 123,82 127,011,11 11,11 12,717,46 17,46 19,0515,87 15,87 17,463 / 3 / 3150 300 to 600 1500R 33 R 34 * R 35131,76 131,76 136,527,93 11,11 11,1114,28 17,46 17,4612,7 15,87 15,874 4 4150 300 to 900 2500R 36 * R 37 R 38149,22 149,22 157,167,93 11,11 15,8714,28 17,46 22,2212,7 15,87 20,644 5 51500 150 300 to 900* R 39 R 40 * R 41161,92 171,45 180,9711,11 7,93 11,1117,46 14,28 17,4615,87 12,7 15,875 6 52500 150 1500R 42 R 43 * R 44190,5 193,67 193,6719,05 7,93 11,1125,4 14,28 17,4623,81 12,7 15,876 6 6300 to 900 1500 2500* R 45 * R 46 * R 47211,13 211,13 228,611,11 12,7 19,0517,46 19,05 25,415,87 17,46 23,818 8 8150 300 to 900 1500R 48 * R 49 * R 50247,65 269,87 269,877,93 11,11 15,8714,28 17,46 22,2212,7 15,87 20,648 10 102500 150 300 to 900R 51 R 52 * R 53279,4 304,8 323,8522,22 7,93 11 ,1128,57 14,28 17,4626,99 12,7 15,8710 10 121500 2500 150* R 54 R 55 R 56323,85 342,9 381,015,87 28,57 7,9322,22 36,51 14,2820,64 34,92 12,712 12 14300 to 900 1500 150* R 57 R 58 R 59381,0 381,0 396,8711,11 22,22 7,9317,46 28,57 14,2815,87 26,99 12,712 14 142500 300 to 600 900R 60 R 61 R 62406,4 419,1 419,131,75 11,11 15,8739,68 17,46 22,2238,1 15,87 20,6414 16 161500 150 300 to 600* R 63 R 64 * R 65419,1 454,0 469,925,4 7,93 11,1133,33 14,28 17,4631,75 12,7 15,8716 16 18900 1500 150* R 66 R 67 R 68469,9 469,9 517,5215,87 28,57 7,9322,22 36,51 14,2820,64 34,92 12,718 18 18300 to 600 900 1500* R 69 * R 70 R 71533,4 533,4 533,411,11 19,05 28,5717,46 25,4 36,5115,87 23,81 34,9220 20 20150 300 to 600 900R 72 * R 73 * R 74558,8 584,2 584,27,93 12,7 19,0514,28 19,05 25,412,7 17,46 23,8120 24 241500 150 300 to 600R 75 R 76 R 77584,2 673,1 692,1531,75 7,93 15,8739,68 14,28 22,2238,1 12,7 20,6424 24 22900 1500 150R 78 R 79 R 80692,15 692,15 615,9525,4 34,92 7,9333,33 44,4531 ,75 41 ,27 12,722 1 1 2 2 3 4 3 5/300 to 600 10000 10000R 81 * R 82 * R 84635,0 57,15 63,514,28 11,11 11,1119,05 15,87 15,87/10000 10000 10000* R 85 * R 86
* R 8779,37 90,49 100,0112,7 15,87 15,8717,46 20,63 20,63/10000 10000 10000* R 88 * R 89 * R 90123,83 114,3 155,5819,05 19,05 22,2223,81 23,81 26,, 400, 600* R 91 R 92 R 932)260,35 228,6 749,331,75 11,11 19,0517,4638,1 15,87 23,8128 30 32300, 400, 600 300, 400, 600 300, 400, 600R 942) R 952) R 962)800,1 857,25 914,419,05 19,05 22,2223,81 23,81 26,9834 36 8300, 400, 600 300, 400, 600 2000, 3000R 972) R 982) * R 99965,2 1022,35 234,9522,22 22,22 11,1126,98 26,98 15,8726 28 30900 900 900R 1002) R 1012) R 1022)749,3 800,1 857,2528,57 31,75 31,7534,92 38,1 38,132 34 36900 900 900R 1032) R 1042) R 1052)914,4 965,2 1022,3531,75 34,92 34,9238,1 41,27 41,27Order example for an oval ring-joint gasket,profile A11, nominal pipe size 5 inches, class 150, made of...1):Ring-joint gasket R 40 A11/1.4541Order example for an octagonal ring-joint gasket,profile A13, nominal pipe size 20 inches, class 1500, made of...1):Ring-joint gasket R 75 A13/1.4541Dimensions in mmNPSclassRing no.Ring dimensionsdmbhh11/2 1/2 1/2300 to 600 900, 1 500 2500R 11 R 12 R 1334,13 39,68 42,866,35 7,93 7,9311,11 14,28 14,289,52 12,7 12,73/4 3/4 1300 to 600 900, 1500 150R 13 R 14 R 1542,86 44,45 47,627,93 7,93 7,9314,28 14,28 14,2812,7 12,7 12,73/4 1 1 1/42500 300 to 1500 150R 16 R 16 R 1750,8 50,8 57,157,93 7,93 7,9314,28 14,28 14,2812,7 12,7 12,71 1 1/4 1 1/22500 300 to 1500 150R 18 R 18 R 1960,32 60,32 65,087,93 7,93 7,9314,28 14,28 14,2812,7 12,7 12,71 1/2 1 1/4 2300 to 1500 2500 150* R 20 R 21 R 2268,26 72,23 82,557,93 11,11 7,9314,28 17,46 14,2812,7 15,87 12,71 1/2 2 22500 300 to 600 900, 1500* R 23 * R 23 * R 2482,55 82,55 95,2511,11 11,11 11,1117,46 17,46 17,4615,87 15,87 15,872 1/2 2 2 1/2150 2500 300 to 600R 25 * R 26 * R 26101,6 101,6 101,67,93 11,11 11,1114,28 17,46 17,4612,7 15,87 15,972 1/2 2 1/2 3900, 1500 2500 150* R 27 R 28 R 29107,95 111,12 114,311,11 12,7 7,9317,46 19,05 14,2815,87 17,46 12,7* These rings comply with API standard 6 A. The dimensions specified in mm are converted dimensions and deviate slightly from the metric API table.State material with orderRing for flange as per ASME B16.47, series ARing-joint gasket, type RX, dimensions according to ASME B16.20 and/or API Std 6 A for API 6B flangesOrder example for a ring-joint gasket, profile A14, nominal pipe size 5 inches, class 3000, made of...1): Ring-joint gasket RX 37 A14/1.45411) State material with orderDimensions in mmNPSclassRing no.Ring dimensions1*drilledhole edbchh1 1/22000, 3000, 5000RX 2076,28,734,6219,053,1822000RX 2393,2711,916,4525,44,2423000, 5000RX 24105,9711,916,4525,44,243 1/85000RX 25109,548,734,6219,053,182 1/22000RX 26111,9211,916,4525,43,782 1/23000, 5000RX 27118,2711,916,4525,44,2432000, 3000RX 31134,5411,916,4525,44,2435000RX 35147,2411,916,4525,44,2442000, 3000RX 37159,9411,916,4525,44,2445000RX 39172,6411,916,4525,44,2452000, 3000RX 41191,6911,916,4525,44,2455000RX 44204,3911,916,4525,44,2462000, 3000RX 45221,8511,916,4525,44,2465000RX 46222,2513,496,6828,584,788crossover flangeRX 47245,319,8410,3441,286,8882000, 3000RX 49280,5911,916,4525,44,2485000RX 50283,3716,678,5131,755,28102000, 3000RX 53334,5711,916,4525,44,24105000RX 54337,3416,678,5131,755,28122000, 3000RX 57391,7211,916,4525,44,24145000RX 63441,7226,9914,7850,88,46162000RX 65480,6211,916,4525,44,24163000RX 66483,3916,678,5131,755,28182000RX 69544,111,916,4525,44,24183000RX 70550,119,8410,3441,286,88202000RX 73596,113,496,6831,755,281,6203000RX 74600,8719,8410,3441,286,88RX 8267,8711,916,4525,44,24RX 8474,2211,916,4525,44,241,6RX 8590,0913,496,6825,44,241,6RX 86103,5815,088,5128,584,782,4RX 87113,115,088,5128,584,782,4RX 88139,317,4610,3431,755,283,2RX 89129,7818,2610,3431,755,283,21 1/45000RX 90174,6219,8412,1744,457,423,2RX 91286,9430,1619,8145,247,543,2RX 99245,6711,916,4525,44,24RX 20151,465,743,211,31,451 3/5000RX 20562,315,563,0511,11,832 1/5000RX 21097,639,535,4119,053,1845000RX 215140,8911,915,3325,44,244x 41/45000RX 215140,8911,915,3325,44,24A compensating drilled hole on the periphery of the ring.Ring-joint gasket, type BX, dimensions according to API Std 6 A for API 6BX flangesOrder example for a ring-joint gasket, profile A12, nominal pipe size 3 1/16 inches, class 15000, made of...1): Ring-joint gasket BX 154 A12/1.45411) State material with orderDimensions in mmNPSclassRing noRing dimensions1* drilled hod1bh111/1610000, 15000BX 15072,199,309,301,6113/1610000, 15000, 20000BX 15176,409,639,631,62 1/10000, 15000, 20000BX 15284,6810,2410,251,62 9/1610000, 15000, 20000BX 153100,9411,3811,381,63 1/1610000, 15000, 20000BX 154116,8412,4012,401,64 1/10000, 15000, 20000BX 155147,9614,2214,221,67 1/1610000, 15000, 20000BX 156237,9218,6218,623,2910000, 15000BX 157294,4620,9820,983,21110000, 15000BX 158352,0423,1423,143,213 5/10000BX 159426,7225,7025,703,213 5/5000BX 160402,5913,7423,833,216 3/5000, 10000BX 161491,4116,2028,073,216 3/BX 162475,4914,2214,221,618 3/5000BX 163556,1617,3730,103,218 3/10000BX 164570,5624,5930,103,221 1/5000BX 165624,7118,4932,033,221 1/410000BX 166640,0326,1432,033,226 3/2000BX 167759,3613,1135,861,626 3/3000BX 168765,2516,0535,861,65 1/810000BX 169173,5212,9315,841,692000, 3000BX 170218,0314,2214,221,611BX 171267,4414,2214,221,613 5/BX 172333,0714,2214,221,630BX 303852,7516,9737,951,6* A compensating drilled hole on the periphery of the ring.
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