Mi p Gaskets

8/9/2019 Mi p Gaskets

1/15


2/15

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.

1


3/15

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.

2


4/15

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.

3


5/15

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

4


6/15


7/15

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.


8/15

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.


9/15

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

8


10/15


11/15

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


12/15

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


13/15

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)

FGHDSFGFHGFGH


14/15

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


15/15

Documents

Mi p Gaskets