Ring-joint gaskets are manufactured from a metallic material. The demands on the geometrical accuracy and the surface quality are therefore high. This concerns both the gasket and the sealing section of the flange. The necessary surface quality depends substantial on the Brinell hardness of the gasket material. We have found that the relation RZ[mm] < 300/HB gives a useful estimation. A distinction is made between two kinds of ring-joint gaskets and two different calculation methods can be derived thereof: 1. RTJ gaskets with a snuggle fitting radius (figure 1) a) The convex octagonal RTJ gaskets, profile AR 13, in which the cambered cone case surfaces of the gasket are pressed against the bevel cone case surfaces of the groove during fastening. b) The oval ring-joint gasket, our profile A11, in which the ball sealing surfaces are pressed against the cone case surfaces. At this types the projection of the sealing surface width bD results from the angle a, which the sealing surface against the force direction (pipe axis) forms as a function of the Emodulus ED and the number of contacting surfaces n σ bD = b1 + b2 = 100 • E • r • n • sinα. D Important: The surface pressure increase or decreases sub proportional to a possible change of the bolt force.
projection in the direction of the bolting force bD = b1 + b2 is to be set as the sealing surface width. Important: The surface pressure increase or decreases proportional to a possible change of the bolt force. The calculations according to the preliminary standard DIN 2505 with the gasket parameters k0 and k1, which represent a fictive width, do not deal with the complicated conditions in snuggle fitting gaskets. The application limits of oval and octagonal ring-joint gaskets can be calculated more accurately as a function of the material, diameter, pressure and temperature among other things in accordance with the publication entitled "Optimisation of static gaskets", 3. edition, by Hans-Joachim Tückmantel, published by Kempchen Publishing, Oberhausen 1990, ISBN no. 3-88432-003-3. Here the gasket parameters are replaced by the values σv and σϑ as well as by the previous stated sealing width bD.
Ring-Joints RTJ
Ring-Joints RTJ
Ring-joint gaskets according to API and ASME standards are mainly used in the petrochemical industry and in refineries as a reliable gasket for pipelines with products. We are entitled to give our products the API stamp of quality - thus guaranteeing compliance of the design with the latest API standards. Profile AR 13 with cambered flanks. The advantages when using convex shaped RTJ gaskets are explained in detail in the article entitled "The Latest on Ring-Joint Gaskets" which you can request from us as a special publication. Ring-joint gaskets can also be manufactured as a blind profile A11S, A13S, etc. or as a spectacle-type blind profile A11BS, A13BS, etc.
AR13
A11
figure 1
Disturbing turbulences and deposits are avoided by means of the additional placement of a protector ring made of steel our Profile F 22. In the case of small rim widths the protective gaskets are symmetrical, with larger rim widths they are unilaterally centred. Soft-iron compensating caps, our profiles AK11, AK12, AK13, AK14, are supplied for damaged grooves. For comprehensive calculations with regard to sealing flanged connections our gasket calculation service is at your disposal at a favourable price.
A13
A14
figure 2
2. RTJ gaskets with flat sealing surfaces (figure 2) The octagonal RTJ gasket, our profiles A13 and A14, in which the sealing surfaces are two cone case surfaces. The
Gaskets • Packings • Expansion Joints • Rubber and Plastic Parts
1
Ring-Joints RTJ
Materials, profiles, surface pressure limits, surface roughness
Code designation
Material no. Hardness US Type (HB) AISI
Pure iron e.g. Armco 1.1003 Low-carbon steel -
Identifi cation
90-100
Soft-iron
D
120
Low-carbon steel
S
Profile A13
13 CrMo 4 4
1.7335
< 150
-
7335
12 CrMo 19 5
1.7362
ca. 130
501
F5
X6 Cr 13
1.4000
ca. 160
410
S 410
X5 CrNi 18 10
1.4301
ca. 160
304
S 304
X5 CrNiMo 17 12 2
1.4401
ca. 160
316
S 316
X6 CrNiTi 18 10
1.4541
ca. 160
321
S 321
A13S
X6 CrNiNb 18 10
1.4550
ca. 160
347
S 347
X6 CrNiMoTi 17 12 2
1.4571
ca. 160
316 Ti
316 Ti
A13BS AR13
* See our brochure entitled "Commercial materials" for further technical data
Profile
Cross section
A14 F22
Cross section
A11
AK11
A11S
AK12
A11BS
AK13
A12
AK14
Compensating caps for damaged grooves
Protective gaskets profile F22
Ring-joint blind profile A11S according to Kempchen drawing D-665
Ring-joint spectacle-type blind profile A11S according to Kempchen drawing D-851
Stainless special steel 1.4541
Stainless special steel 1.4828
Coppercoated steel
µm
3,2
3,2
3,2
1,6
1,6
3,2
6,3
3,2
3,2
to σv σϑ
6,3 235 525
6,3 300 675
6,3 400 900
3,2 335 750
3,2 400 900
6,3 135 600
12,5 100 750
6,3 135 300
6,3 260 660
Surface pressure limits for 20°C
N/mm2
E-modulus at 20°C
kN/mm2
210
210
210
200
200
210
200
128
178
Surface pressure
N/mm2
limits for 300°C
σv
235
300
400
335
400
135
100
135
260
σϑ
315 185
585 185
730 190
630 186
750 186
390 185
630 186
150 114
2
E-modulus at 300°C
kN/mm2
650 175
Monel 2.4360
High-temperature structural steel 1.7362
roughness of the flange surfaces
Copper 2.0090
High-temperature structural steel 1.5415
from
Material
Recommended max. surface
Stainless steel 1.4541 silver-coated
A11, A11S, A11BS, A12, A13, A13S, A13BS, AR13, AR13S, AR13BS, A14
Iron 1.1003
Profile
Ring-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 A
Order example for an oval ring-joint gasket, profile A11, nominal pipe size 5 inches, class 150, made of...1): Ring-joint gasket R 40 A11/1.4541 Order example for an octagonal ring-joint gasket, profile A13, nominal pipe size 20 inches, class 1500, made of...1): Ring-joint gasket R 75 A13/1.4541 Dimensions in mm Ring no. NPS
dm
1
/2 1 /2 1 /2
300 to 600 900, 1 500 2500
R 11 R 12 R 13
34,13 39,68 42,86
6,35 7,93 7,93
11,11 14,28 14,28
9,52 12,7 12,7
3
1
300 to 600 900, 1500 150
R 13 R 14 R 15
42,86 44,45 47,62
7,93 7,93 7,93
14,28 14,28 14,28
12,7 12,7 12,7
3 /4 1 1 1 /4
2500 300 to 1500 150
R 16 R 16 R 17
50,8 50,8 57,15
7,93 7,93 7,93
14,28 14,28 14,28
12,7 12,7 12,7
1 1 1 /4 1 1 /2
2500 300 to 1500 150
R 18 R 18 R 19
60,32 60,32 65,08
7,93 7,93 7,93
14,28 14,28 14,28
12,7 12,7 12,7
1 1 /2 1 1/4 2
300 to 1500 2500 150
* R 20 R 21 R 22
68,26 72,23 82,55
7,93 11,11 7,93
14,28 17,46 14,28
12,7 15,87 12,7
1 1 /2 2 2
2500 300 to 600 900, 1500
* R 23 * R 23 * R 24
82,55 82,55 95,25
11,11 11,11 11,11
17,46 17,46 17,46
15,87 15,87 15,87
2 1 /2 2 2 1 /2
150 2500 300 to 600
R 25 * R 26 * R 26
101,6 101,6 101,6
7,93 11,11 11,11
14,28 17,46 17,46
12,7 15,87 15,97
2 1 /2 2 1 /2 3
900, 1500 2500 150
* R 27 R 28 R 29
107,95 111,12 114,3
11,11 12,7 7,93
17,46 19,05 14,28
15,87 17,46 12,7
/4 3 /4
*
class
Ring dimensions b h h1
These rings comply with API standard 6 A. The dimensions specified in mm are converted dimensions and deviate slightly from the metric API table. 1) State material with order 2) Ring for flange as per ASME B16.47, series A
Dimensions in mm NPS
class
Ring no.
dm
b
Ring dimensions h h1
3 3 3
300 to 600 300 to 900 2500
* R 30 * R 31 R 32
117,47 123,82 127,0
11,11 11,11 12,7
17,46 17,46 19,05
15,87 15,87 17,46
3 1/2 3 1/2 3
150 300 to 600 1500
R 33 R 34 * R 35
131,76 131,76 136,52
7,93 11,11 11,11
14,28 17,46 17,46
12,7 15,87 15,87
4 4 4
150 300 to 900 2500
R 36 * R 37 R 38
149,22 149,22 157,16
7,93 11,11 15,87
14,28 17,46 22,22
12,7 15,87 20,64
4 5 5
1500 150 300 to 900
* R 39 R 40 * R 41
161,92 171,45 180,97
11,11 7,93 11,11
17,46 14,28 17,46
15,87 12,7 15,87
5 6 5
2500 150 1500
R 42 R 43 * R 44
190,5 193,67 193,67
19,05 7,93 11,11
25,4 14,28 17,46
23,81 12,7 15,87
6 6 6
300 to 900 1500 2500
* R 45 * R 46 * R 47
211,13 211,13 228,6
11,11 12,7 19,05
17,46 19,05 25,4
15,87 17,46 23,81
8 8 8
150 300 to 900 1500
R 48 * R 49 * R 50
247,65 269,87 269,87
7,93 11,11 15,87
14,28 17,46 22,22
12,7 15,87 20,64
8 10 10
2500 150 300 to 900
R 51 R 52 * R 53
279,4 304,8 323,85
22,22 7,93 11 ,11
28,57 14,28 17,46
26,99 12,7 15,87
10 10 12
1500 2500 150
* R 54 R 55 R 56
323,85 342,9 381,0
15,87 28,57 7,93
22,22 36,51 14,28
20,64 34,92 12,7
12 12 14
300 to 900 1500 150
* R 57 R 58 R 59
381,0 381,0 396,87
11,11 22,22 7,93
17,46 28,57 14,28
15,87 26,99 12,7
12 14 14
2500 300 to 600 900
R 60 R 61 R 62
406,4 419,1 419,1
31,75 11,11 15,87
39,68 17,46 22,22
38,1 15,87 20,64
14 16 16
1500 150 300 to 600
* R 63 R 64 * R 65
419,1 454,0 469,9
25,4 7,93 11,11
33,33 14,28 17,46
31,75 12,7 15,87
16 16 18
900 1500 150
* R 66 R 67 R 68
469,9 469,9 517,52
15,87 28,57 7,93
22,22 36,51 14,28
20,64 34,92 12,7
18 18 18
300 to 600 900 1500
* R 69 * R 70 R 71
533,4 533,4 533,4
11,11 19,05 28,57
17,46 25,4 36,51
15,87 23,81 34,92
20 20 20
150 300 to 600 900
R 72 * R 73 * R 74
558,8 584,2 584,2
7,93 12,7 19,05
14,28 19,05 25,4
12,7 17,46 23,81
20 24 24
1500 150 300 to 600
R 75 R 76 R 77
584,2 673,1 692,15
31,75 7,93 15,87
39,68 14,28 22,22
38,1 12,7 20,64
24 24 22
900 1500 150
R 78 R 79 R 80
692,15 692,15 615,95
25,4 34,92 7,93
33,33 44,45
31 ,75 41 ,27 12,7
22 1 1 1/2
300 to 600 10000 10000
R 81 * R 82 * R 84
635,0 57,15 63,5
14,28 11,11 11,11
19,05 15,87 15,87
2 2 1/2 3
10000 10000 10000
* R 85 * R 86 * R 87
79,37 90,49 100,01
12,7 15,87 15,87
17,46 20,63 20,63
4 3 1/2 5
10000 10000 10000
* R 88 * R 89 * R 90
123,83 114,3 155,58
19,05 19,05 22,22
23,81 23,81 26,98
10
10000
26
300, 400, 600
* R 91 R 92 R 932)
260,35 228,6 749,3
31,75 11,11 19,05
28 30 32
300, 400, 600 300, 400, 600 300, 400, 600
R 942) R 952) R 962)
800,1 857,25 914,4
19,05 19,05 22,22
23,81 23,81 26,98
34 36 8
300, 400, 600 300, 400, 600 2000, 3000
R 972) R 982) * R 99
965,2 1022,35 234,95
22,22 22,22 11,11
26,98 26,98 15,87
26 28 30
900 900 900
R 1002) R 1012) R 1022)
749,3 800,1 857,25
28,57 31,75 31,75
34,92 38,1 38,1
32 34 36
900 900 900
R 1032) 914,4 R 1042) 965,2 R 1052) 1022,35
31,75 34,92 34,92
38,1 41,27 41,27
17,46
Ring-Joints RTJ
Ring-Joint Gaskets, Type R
38,1 15,87 23,81
3
Ring-Joints RTJ
Ring-Joint Gaskets, Type RX
Ring-joint gasket, type RX, dimensions according to ASME B16.20 and/or API Std 6 A for API 6B flanges Order example for a ring-joint gasket, profile A14, nominal pipe size 5 inches, class 3000, made of...1): Ring-joint gasket RX 37 A14/1.4541 1) State material with order
Dimensions in mm Ring dimensions
Ring no. NPS
1 1/2 2 2 3 1/8 2 1/2 2 1/2 3 3 4 4 5 5 6 6 8 8 8 10 10 12 14 16 16 18 18 20 20
1 1 /4 1 3 /4 2 1 /2 4 4x 41/4
class
2000, 3000, 5000 2000 3000, 5000 5000 2000 3000, 5000 2000, 3000 5000 2000, 3000 5000 2000, 3000 5000 2000, 3000 5000 crossover flange 2000, 3000 5000 2000, 3000 5000 2000, 3000 5000 2000 3000 2000 3000 2000 3000
5000 5000 5000 5000 5000
d1
RX 20 RX 23 RX 24 RX 25 RX 26 RX 27 RX 31 RX 35 RX 37 RX 39 RX 41 RX 44 RX 45 RX 46 RX 47 RX 49 RX 50 RX 53 RX 54 RX 57 RX 63 RX 65 RX 66 RX 69 RX 70 RX 73 RX 74 RX 82 RX 84 RX 85 RX 86 RX 87 RX 88 RX 89 RX 90 RX 91 RX 99 RX 201 RX 205 RX 210 RX 215 RX 215
76,2 93,27 105,97 109,54 111,92 118,27 134,54 147,24 159,94 172,64 191,69 204,39 221,85 222,25 245,3 280,59 283,37 334,57 337,34 391,72 441,72 480,62 483,39 544,1 550,1 596,1 600,87 67,87 74,22 90,09 103,58 113,1 139,3 129,78 174,62 286,94 245,67 51,46 62,31 97,63 140,89 140,89
b
8,73 11,91 11,91 8,73 11,91 11,91 11,91 11,91 11,91 11,91 11,91 11,91 11,91 13,49 19,84 11,91 16,67 11,91 16,67 11,91 26,99 11,91 16,67 11,91 19,84 13,49 19,84 11,91 11,91 13,49 15,08 15,08 17,46 18,26 19,84 30,16 11,91 5,74 5,56 9,53 11,91 11,91
* A compensating drilled hole on the periphery of the ring.
4
c
h1
4,62 6,45 6,45 4,62 6,45 6,45 6,45 6,45 6,45 6,45 6,45 6,45 6,45 6,68 10,34 6,45 8,51 6,45 8,51 6,45 14,78 6,45 8,51 6,45 10,34 6,68 10,34 6,45 6,45 6,68 8,51 8,51 10,34 10,34 12,17 19,81 6,45 3,2 3,05 5,41 5,33 5,33
19,05 25,4 25,4 19,05 25,4 25,4 25,4 25,4 25,4 25,4 25,4 25,4 25,4 28,58 41,28 25,4 31,75 25,4 31,75 25,4 50,8 25,4 31,75 25,4 41,28 31,75 41,28 25,4 25,4 25,4 28,58 28,58 31,75 31,75 44,45 45,24 25,4 11,3 11,1 19,05 25,4 25,4
h
3,18 4,24 4,24 3,18 3,78 4,24 4,24 4,24 4,24 4,24 4,24 4,24 4,24 4,78 6,88 4,24 5,28 4,24 5,28 4,24 8,46 4,24 5,28 4,24 6,88 5,28 6,88 4,24 4,24 4,24 4,78 4,78 5,28 5,28 7,42 7,54 4,24 1,45 1,83 3,18 4,24 4,24
1* drilled hole e
1,6 1,6 1,6 2,4 2,4 3,2 3,2 3,2 3,2
Ring-Joints RTJ
Ring-Joint Gasket, Type BX
Ring-joint gasket, type BX, dimensions according to API Std 6 A for API 6BX flanges
Order 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 A12/1.4541
1) State material with order
Dimensions in mm Ring no NPS
111/16 113/16 2 1/16 2 9/16 3 1/16 4 1/16 7 1/16 9 11 13 5/8 13 5/8 16 3/4 16 3/4 18 3/4 18 3/4 21 1/4 21 1/4 26 3/4 26 3/4 5 1/8 9 11 13 5/8 30
class
10000, 15000 10000, 15000, 20000 10000, 15000, 20000 10000, 15000, 20000 10000, 15000, 20000 10000, 15000, 20000 10000, 15000, 20000 10000, 15000 10000, 15000 10000 5000 5000, 10000 5000 10000 5000 10000 2000 3000 10000
2000, 3000
BX 150 BX 151 BX 152 BX 153 BX 154 BX 155 BX 156 BX 157 BX 158 BX 159 BX 160 BX 161 BX 162 BX 163 BX 164 BX 165 BX 166 BX 167 BX 168 BX 169 BX 170 BX 171 BX 172 BX 303
d1
b
h
1* drilled hole e
72,19 76,40 84,68 100,94 116,84 147,96 237,92 294,46 352,04 426,72 402,59 491,41 475,49 556,16 570,56 624,71 640,03 759,36 765,25 173,52 218,03 267,44 333,07 852,75
9,30 9,63 10,24 11,38 12,40 14,22 18,62 20,98 23,14 25,70 13,74 16,20 14,22 17,37 24,59 18,49 26,14 13,11 16,05 12,93 14,22 14,22 14,22 16,97
9,30 9,63 10,25 11,38 12,40 14,22 18,62 20,98 23,14 25,70 23,83 28,07 14,22 30,10 30,10 32,03 32,03 35,86 35,86 15,84 14,22 14,22 14,22 37,95
1,6 1,6 1,6 1,6 1,6 1,6 3,2 3,2 3,2 3,2 3,2 3,2 1,6 3,2 3,2 3,2 3,2 1,6 1,6 1,6 1,6 1,6 1,6 1,6
Ring dimensions
* A compensating drilled hole on the periphery of the ring.
5
