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IntroductionSince 1972, Madras Industrial Products have been manufacturing and supplying gaskets
for Heat Exchangers, Pressure Vessels and piping connections in Refineries, Fertilizers,Petrochemicals, Chemicals, Process Plants, Atomic Energy, Oil Fields, Navy, Ship
Building Industries, Railways and other Process Industries. Gaskets are supplied for both
Project installations and maintenance replacements. MIP supplies gaskets meetingcustomers requirements of size, pressure, temperature, shape and material. MIPs record
of steady growth has been due to the dedication to produce highest quality and reliable
gaskets at competitive prices.
MIP Gaskets are approved by renowned consultants like EIL, PDIL, UHDE, Tata
Consultants, Davy Powergas, NPC, ICB, Simon carves, Humphreys and Glasgow
etc. and inspecting organizations like Lloyds, Bureau veritas, EIL, Detnorske
Veritas etc.
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High quality Spiral Wound Gaskets have proved to be the most reliable static seal for use
in difficult, critical and arduous conditions MIP. Spiral Wound Gaskets have the
following inherent advantages
Positive seal under MIP superior configuration design of the metal strips,exacting conditions: gives innate resilience that permits the gasket to adjust
automatically to change in operating conditions such as line
pressure and thermal shocks, frequent or sudden vibrations,
minor flange separations, fluctuating temperatures and
pressures and works in almost all known toxic andcorrosive fluids with a suitable combination of metal and
filler.
Fitment & easy Less downtime as fitment is quick and simple. No special
installation: flange face finish is required. Can even be used where theflanges are misaligned or pitted. These gaskets do not stickwith the flange faces nor cause corrosion thus avoiding
expensive cleaning time.
Controlled compressibility:Compression depends upon the density of the gasket whichis varied according to the pressure application by changing
the percentage of metal to filler in any given flange width.
This ensures constant gasket stress at all times wheninstalled.
Materials: Strip: Stainless Steel 304,304L, 316,316L, 321, 410, Monel,Inconel, etc.
Filler:CAF, Acid Resistance CAF, White Asbestos, PTFE, Graf
oil etc.(Graphite tape uncrimped )
Outer ring:Carbon Steel, Stainless Steel 304,316 etc.
Standard: Conforming to API 601, BS 3381, BS 4504, BS 4865, BS
3293, API 605, MSS SP-44, DIN, Admiralty, DGS 8851Aetc. and to customers specifications.
Size: MIP Spiral Wound gaskets are manufactured in dimensions
from 1/4 to 96 and thickness from 1/8 to 3/8 Generally,
gasket thickness is 0.175 and outer ring thickness is0.125.
Shape: MIP Spiral Wound gaskets are manufactured in Round,
obround, square, oval, Diamond and pear shapes.
Types: MIP Spiral Wound gaskets are manufactured with innerand outer ring, with Inner ring only, with outer ring only
and without rings as per buyers requirements.
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Gaskets with Outer ring: This is a standard spiral Wound gasket consisting of
a sealing element and a solid metal outer ring. The
outer ring performs the following important functions.
(a) Centre the gaskets in the joint. (b) Furnishes extra-radial strength to help prevent gasket blow out. (c)
Resists atmospheric conditions. (d) Provides a gauge
reference point for determining compression duringbolt pull up. This type of gasket is used in (1) Raised
face and Raised Face slip-on joints (2) Plain or flat
face joints (3) Van Stone Joints (4) Lapped joints and(5) Welding neck flanged joints.
Gaskets with inner & Outer
rings:
The outer ring serves as a centering guide and the
inner ring fills the flange recess to prevent fluid from
entering the recess and reduces turbulent flow of thefluid. The inner ring converts one of a pair of smoothface flanges into a groove flange providing all the
safety of a totally contained gasket restricting lateral
flow of gasket inwards towards the bore. Itsupplements the compression gauge of the outer ring.
Acts as a heat and corrosion barrier protecting gasketwinding and flanges. Suitable for use with flat face
and raised face and recommended for high pressure
temperature service particularly where corrosive ortoxic fluids are involved. Highly suitable for vacuum
services also.
Gaskets without rings: These are suitable for large tongue & groove joints,
small tongue and groove joints, large male & female
joints. Recommended for valves and high pressure
pumps. Highly suitable for use where limited gasketsealing width is available.
Gaskets with inner ring only : Inner solid metal ring fitted with sealing element givesall the advantages as explained earlier in Gaskets with
Inner and Outer rings. This type is suitable for
pressure vessels, Pumps, Boiler Manholes, Caps,covers etc.
Gaskets with Jacketed rib : Construction of the gasket of this type will have
sealing element with the metal clad asbestos, solidmetal pass ribs for use in Heat Exchangers and
Pressure vessels. These gaskets are always designed to
customers specific requirements.
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Flange surfaces: MIP Gaskets when compressed, the filler material
protected by the metal strip flows into undulations andminor imperfections in the flange surface. Hence the
compressive force required on the gasket isproportionate to the flange surface finish.
As a general guide, we suggest the surface finish of
flange face as given in the adjacent table on gasketsselected.
Superfine or polished surface finish should be avoided
since the gasket will have a lateral expansion and willbe ineffective as a seal. A gramophone or concentric
serrated finish is preferable.
Service Flange Surface Finish
Micro Meter Micro InchGeneral duties 3.2 to 5.1 125 to 200 AARH
Hazardous and Hard to
Hold fluids 3.2 125 AARH
Vacuum 2.0 80 AARH
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Quality Control: Our gaskets undergo various exhaustive quality control tests. We have
an in-built quality control procedure, visual and dimensional checks on
all the manufactured gaskets and final compression. Compression
Recovery and Seal ability check on gaskets selected on a statisticalsampling technique. In addition, high pressure, high temperature
cyclical conditions seal ability check is also carried out.
All raw materials are checked for composition and other properties. All
the measuring instruments and testing equipments are subjected to
periodic calibration.
Installation and (a) Always use the right type of gasket intended for the specific joint.
Maintenance Guidance: (b) Always clean dirt and scale from recess and groove of flanges.
(c) Never re-use spiral wound gaskets if thickness of used spiral wound
gasket averages less than 0.145 of gaskets with original thicknessof 0.175 or 0.112 of gaskets with original thickness of 0.125
(d) Never take tightness of joint for granted when faces just come
together metal to metal. It is essential to sung up bolts sufficiently
to keep flanges from being spread apart by pressure of contained
fluids.
(e) Always lubricate bolts with lubricants compatible with operating
conditions.
How to Order MIP gaskets: The following details are to be given by the purchaser :
1.
Nominal Pipe size, Pressure rating and Operating
Temperature.
2. Type of the gaskets.
3.
Thickness of the gasket.
4. Material of the centering ring.
5. Flange Standard.
6. Service Medium.
It is necessary to mention the specification standard of
gaskets at the time of making enquiries. If the requirement
is to purchasers specifications, the relevant drawings andsketches should be forwarded.
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Jacketed gaskets are extensively used on smooth flange applications and are ideal for Heat Exchangers,
Autoclaves, Columns, Boilers, Valve Bonnets, Gas Mains and similar services.
Construction: Jacketed gaskets consist of a sheet metal jacket, and a filler ofasbestos, CAF of some layers of sheet metal. The jacket metal
should be as soft and as plastic as possible taking into account
the corrosiveness of the fluid to be sealed.
The filer material is chosen according to the imperfection of the
flange. The better the surface finish and the flatness of the face
harder the filler can be.
Jacket material: Soft iron, Copper Brass, Aluminum, SS304, 316, 316L, 321,
410, Monel, 5% Cr 1/2 % Mo, etc.
Filler: Non-compressed asbestos, CAF, Woven asbestos, Teflon,Ceramic Fiber, Graphite etc.
Size:
Types of jacketed gaskets: Manufactured to any size without limitations.
FOD MIP Double jacketed asbestos gasket. The two metal jackets
cover both edges and both faces of the filler.
FAS MIP single jacketed asbestos gasket. Asbestos is
enclosed by a single metal jacket.
FOC MIP Corrugated Double jacketed asbestos gasket.
FAO MIP Open edge, double jacketed asbestos gasket. All portions
except the outer edge are covered by metal jacket.
FOK MIP corrugated plain metal jacket with asbestos rope stuck to
the corrugation on both sides.
FTL MIP triple layer corrugated metal gasket. The resiliency
of this gasket is much better than other jacketed gaskets and
hence ideal for Thermal Cyclical service conditions.
FSL MIP single jacketed, asbestos completely encased by the metal.
FOP MIP corrugated plain metal gasket For low pressure joints and
valve bonnets where space and weight limitations are prominent
design factors. A minimum of 3 corrugations are recommended
for effective resiliency and sealing.
FMR MIP Inner Metal Re-inforced CAF Gasket: The metal beading
protects attack of Inner Fluid giving a longer life and
performance.
FTMR MIP SS Reinforced CAF Teflon covered Gaskets:
The metal beading protects CAF from the attack of Acid and
other corrosive service fluids. In addition, all over the surface
CAF is protected by the inert Teflon thin envelops.The construction of these gaskets completely prevents contact of
the service fluid with CAF.
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GASKET FACTORS
MIP Gasket Design Values of M and y conforms to the requirements of ASME
code section VIII Div. I.: Table UA 49.1:
Type Cross Section MATERIAL M Y(PSI)
Solid Metal SOFT ALUMINIUM
SOFT BRASS OR COPPER
SOFT IRON AND STEELSTAINLESS STEEL
4.00
4.75
5.506.50
8800
13000
1800026000
Corrugated PlainMetal
SOFT IRON AND STEELSTAINLESS STEEL
3.253.75
55007600
Corrugated Plain
Metal Asbestos
SOFT IRON AND STEEL
STAINLESS STEEL
3.00
3.50
4500
6500Corrugated double
Jacketed
SOFT BRASS & COPPER
SOFT IRON & STEELSTAINLESS STEEL
2.75
3.003.50
3700
45006500
Spiral wound (with
or without Ring)
STAINLESS STEEL/MODEL 3 10000
Single and Double
Jacketed
SOFT BRASS/COPPER
IRON OR STEEL
STAINLESS STEEL & MONEL4 TO 6 % CHROME 0.5 %
MOLY
3.50
3.75
3.753.50
6500
7600
90008000
Ring Joints SOFT IRON OR STEEL4 TO 6 % CHROME 0.5 %
MOLYSTAINLESS STEEL
5.56.00
6.50
1800021800
26000
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API Approval
MIP is API approved manufacturer of Ring joints and are authorized to use API monogram in MIP
Ring joint gaskets which ensures strict conformity with all the latest requirements of API 6A standard.
LICENCE NO. 6A 0415
Ring-Joint Gaskets Type R Dimensions
to ANSI B 16.20 or API Std. 6A
Dimensions in mm
* These rings correspond to API Std.6 A
Dimensions of ringNB
inches
Ib Ring
No.p a h h16
6
6
300,400,600,
9001500
300
*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
88
8
150300,400,600,
900
1500
R 48*R 49
*R 50
247.65269.87
269.87
7.9311.11
15.87
14.2817.46
22.22
12.715.87
20.64
8
10
10
2500
150
300,400,600,900
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
300,400,600,9001500
150
*R 57
R 58
R 59
381.0
381.0396.87
11.11
22.227.93
17.46
28.5714.28
15.87
26.9912.7
1214
14
2500300,400,600
900
R 60R 61
R 62
406.4419.1
419.1
31.7511.11
15.87
39.6817.46
22.22
38.115.87
20.64
1416
16
1500150
300,400,600
*R 63R 64
*R 65
419.1454.02
469.9
25.47.93
11.11
33.3314.28
17.46
31.7512.7
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
1818
18
300,400,600900
1500
*R 69*R 70
R 71
533.4533.4
533.4
11.1119.05
28.57
17.4625.4
36.51
15.8723.81
34.92
2020
20
150300,400,600
900
R 72*R 73
*R 74
558.8584.2
584.2
7.9312.7
19.05
14.2819.05
25.4
12.717.46
23.81
20
24
24
1500
150
300,400,600
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
2424
22
9001500
150
R 78R 79
R 80
692.15692.15
215.95
25.434.92
7.93
33.3344.45
31.7541.27
12.7
2226
30
300,400,600300,400,600
300,400,600
R 81R 93
R 95
635.0749.3
857.25
14.2819.05
19.05
19.0523.81
23.81
34
36
300,400,600
300,400,600
R97
R98
*R82
965.2
1022.3
57.15
22.22
22.22
11.11
26.98
26.98
15.87
*R84
*R85*R86
63.5
79.3790.49
11.11
12.715.87
15.87
17.4620.63
*R87*R88
*R89
100.01123.83
114.3
15.8719.05
19.05
20.6323.81
23.81
*R90
*R91
R92
155.58
260.35
228.6
22.22
31.75
11.11 17.46
26.98
38.1
15.87
28
32
300,400,600
300,400,600
R94
R96
*R99
800.1
914.4
234.95
19.05
22.22
11.11
23.81
26.98
15.87
2628
30
900900
900
R100R101
R102
749.3800.1
857.25
28.5731.75
31.75
34.9238.1
38.1
32
34
36
900
900
900
R103
R104
R105
914.4
965.2
1022.3
31.75
34.92
34.92
38.1
41.27
41.27
Dimensions of RingNB
inches
Ib Ring
No. p a h h1
1/2
1/21/2
300,600
15002500
R11
R12R13
34.13
39.6842.86
6.35
7.937.93
11.11
14.2814.28
9.52
12.712.7
3/4
3/4
1
300,600
1500
150
R13
R14
R15
42.86
44.45
47.62
7.93
7.93
7.93
14.28
14.28
14.28
12.7
12.7
12.73/4
11-1/4
2500
300,600,1500150
R16
R16R17
50.8
50.857.15
7.93
7.937.93
14.28
14.2814.28
12.7
12.712.7
1
1-1/41-1/2
2500
300,600,1500150
R18
R18R19
60.32
60.3265.08
7.93
7.937.93
14.28
14.2814.28
12.7
12.712.7
1-1/2
1-1/42
300,600,1500
2500150
*R20
R21R22
68.26
72.2382.55
7.93
11.117.93
14.28
17.4614.28
12.7
15.8712.7
1-1/22
2
2500300,600
1500
*R23*R23
*R24
82.5582.55
92.25
11.1111.11
11.11
17.4617.46
17.46
15.8715.87
15.87
2-1/2
22-1/2
150
2500300,600
R25
*R26*R26
101.6
101.6101.6
7.93
11.1111.11
14.28
17.4617.46
12.7
15.8715.87
2-1/22-1/2
3
15002500150
*R27R28R29
107.95111.12114.3
11.1112.77.93
17.4619.0514.28
15.8717.46
12.7
--3
3
--300,600,900
2500
R30*R31
R32
117.47123.82
127.0
11.1111.11
12.7
17.4617.46
19.05
15.8715.87
17.46
3-1/2
3-1/23
150
300,6001500
R33
R34*R35
131.76
131.76136.52
7.93
11.1111.11
14.28
17.4617.46
12.7
15.8715.87
4
44
150
300,400,600900
2500
R36
*R37
R38
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
300,400,600
900
*R39
R40
*R41
161.92
171.45
180.97
11.11
7.93
11.11
17.46
14.28
17.46
15.87
12.7
15.875
65
2500
1501500
R42
R43*R44
190.5
193.67193 67
19.05
7.9311 11
25.4
14.2817 46
23.81
12.715 87
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Ring-Joint Gaskets, Type RX Dimensions to Ring-joint Gaskets Type BX Dimensions to
API Std. 6 A for 6 B Flanges API Std. for 6 A for 6 BX Flanges
Dimensions in mm Dimensions in mm
* One bore-hole at circumference for pressure-balance1) State in P.O
Dimensions of Ring 1boreNB(inches)
LB RingNo.
od a c hl h e
1-1/2
22
2000,3000
,5000
20003000,5000
RX 20
RX 23RX 24
76.2
93.27105.97
8.73
11.9111.91
4.62
6.456.45
19.05
25.425.4
3.18
4.244.24
2-1/2
2-1/2
3
2000
3000,5000
2000,3000
RX 26
RX 27
RX 31
111.92
118.27
134.54
11.91
11.91
11.91
6.45
6.45
6.45
25.4
25.4
25.4
3.78
4.24
4.24
3
44
5000
2000,300050000
RX 35
RX 37RX 39
147.24
159.94172.64
11.91
11.9111.91
6.45
6.456.45
25.4
25.425.4
4.24
4.244.24
5
5
6
2000,3000
5000
2000,3000
RX 41
RX 44
RX 45
191.69
204.39
221.85
11.91
11.91
11.91
6.45
6.45
6.45
25.4
25.4
25.4
4.24
4.24
4.24
6
8
5000
2000,3000
RX 46RX 47
RX 49
222.25245.3
280.59
13.4919.84
11.91
6.6810.34
6.45
28.5841.28
25.4
4.786.88
4.24
8
1010
5000
2000,30005000
RX 50
RX 53RX 54
283.37
334.57337.34
16.67
11.9116.67
8.51
6.458.51
31.75
25.431.75
5.28
4.245.28
12---
16
2000,3000--------
2000
RX 57RX 63
RX 65
391.72441.72
480.62
11.9126.99
11.91
6.4514.78
6.45
25.450.8
25.4
4.248.46
4.24
16
18
18
3000
2000
3000
RX 66
RX 69
RX 70
483.39
544.1
550.1
16.6711.91
19.84
8.516.45
10.34
31.7525.4
41.28
5.284.24
6.88
20
20
2000
3000
RX 73
RX 74
RX 82
596.1
600.87
67.87
13.49
19.84
11.91
6.68
10.34
6.45
31.75
41.28
25.4
5.28
6.8
4.24 1.6
RX 84
RX 85RX 86
74.22
90.09103.58
11.91
13.4915.08
6.45
6.688.51
25.4
25.425.8
4.24
4.244.78
1.6
1.62.4
RX 87RX 88
RX 89
113.11139.3
129.78
15.0817.46
18.26
8.5110.34
10.34
28.5831.75
31.75
4.785.28
5.28
2.43.2
3.2
RX 90RX 91
RX 99
174.62286.94
245.667
19.8430.16
11.91
12.1719.81
6.45
44.4545.24
25.4
7.427.54
4.24
3.23.2
2
3
1-1/4
5000
5000
5000
RX 20
RX 25
RX201
76.2
109.54
51.46
8.73
8.73
11.51
4.62
4.62
3.2
19.05
19.05
11.3
3.18
3.18
1.45
1-3/4
2-1/2
44x4-1/4
5000
5000
50005000
RX205
RX210
RX215RX215
62.31
97.63
140.89140.89
5.56
9.53
140.89140.89
3.05
5041
5.335.33
11.1
19.05
25.425.4
1.83
3.18
4.244.24
Dimensions of Ring N.B
inches
Ib Ring
No.od a h
1-
11/161-
13/16
2-1/16
10000,15000
10000,15000,20000
10000,15000
,20000
BX150
BX151BX152
72.19
76.4084.68
9.30
9.6310.24
9.30
9.6310.25
2-9/16
3-1/16
4-1/16
10000,15000
,20000
10000,15000,20000
10000,15000
,20000
BX153
BX154
BX155
100.94
116.84
147.96
11.38
12.40
14.22
11.38
12.40
14.22
7-1/169
11
10000,15000,20000
10000
10000
BX156BX157
BX158
237.92294.46
352.04
18.6220.98
23.14
18.6220.98
23.14
13-5/8
13-5/8
10000
5000
BX159
BX160
426.72
402.59
25.70
13.74
25.70
13.74
16-3/4
16-3/4
18-3/4
18-3/4
5000
5000,10000
5000
10000
BX161
BX162
BX163
BX164
491.41
475.49
556.16
570.56
16.20
14.22
17.37
24.59
16.20
14.22
30.10
30.10
21-1/4
21-1/4
5000
10000
BX165
BX166
624.71
640.03
18.49
26.14
32.03
32.03
26-3/4
26-3/4
2000
30000
BX167
Bx168
759.36
765.25
13.11
16.05
35.86
35.86
5-1/8 10000 BX169 173.52 12.93 15.84
1) State in P.O
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Thermal Power Plants, Nuclear Reactors etc., in their High Pressure
Equipments or High Pressure Valves prefer self sealing plates than flange
joints. Self Sealing Rings are designed the internal pressure helps the pre-
compression of the sealing rings, thereby offering very effective sealing.
In sealing rings the sealing force is brought about by the internal
pressure than by the bolts.
MIP self sealing rings are manufactured to the dimensional requirements to
suit internationally renowned High Pressure Valves.
MIP Self Sealing Rings are made out of soft iron with hardness 90 BHN
max. Sealing surfaces are maintained with 0.8 microns max. Finish. Otherphases are mainted to 3.2 microns max.
MIP Self Sealing Rings could be supplied with silver Coating on request.
Note: MIP Sealing rings and other special Metal Gaskets could be on request
supplied with a wax Coating which prevents the gasket from rusting due to
atmospheric conditions and also avoids scratching on the surface of the
gaskets.
We could supply Self Sealing Rings made out of compressed Asbestos
Graphite Coated or Pure Graphite which are generally used for lowerpressures.
Could be supplied in different materials, with or without facing
Materials (Graphite, PTFE.CAF)
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Lens gaskets
Lens Gaskets are with the radius on the sealing surface: Bolt load
required is comparatively less as contact surface with flange is
spherical.
Manufactured to DIN 2696 Std.
NW 10-400, ND 64-400 DIN Flanges
Delta gaskets
Round torroidal gaskets
Semi-round torroidal gaskets
Concentric serrated gaskets
Serrated gaskets are used mainly in high pressure joints. As the
serrated sharp edge of the gasket would damage the flange faces,
these gaskets are normally used with covering layers of CAF, soft
iron, Teflon, Aluminum etc. Normally the covering layer is 0.5 mm
to 1 mm thick. The serrated gasket serves as a support to develop
high contact pressures.
Available in 3mm thickness and above in Carbon steel, Stainless
steel etc.
Plain flat ring gaskets
Teflon solid and enveloped gaskets
Teflon enveloped with corrugated Stainless steel and asbestos
composite gasket. These gaskets are normally used in Glass lined
vessels.
The torque load required is comparatively very less. The presence of
stainless steel corrugated inner core offers excellent compression and
recovery factors.
Soft and shim gasketsGaskets made out of different grades of CAF, Millboard Asbestos etc
to suit the service conditions. These are offered in all intricate shapes
maintaining dimensional accuracies.
Gaskets made out of shims in steel, stainless steel, aluminum, copper,
brass etc.
Export orders are supplied under the Brand name of MIPTEK
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