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The ugustus Group

Products Projects and Engineering

Consulting

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ASME BOILER AND

PRESSURE VESSEL CODEMike Looram

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ASME B&PV CODE SECTION VIII DIV. 1

Bolted Flanges With Ring Type Gaskets

Stress Calculations Based On Plate & Shell Theory

Stresses Due To Moments Applied To Flange Ring

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RAISED FACE JOINT

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4 600# ANSI B16.5 LEAK TEST RIG

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LEAK TEST RIG

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TEST EQUIPMENT

FLANGE: 4 INCH 600 LB. B 16,5RAISED FACE 1/64 GROOVES

GASKET: SPIRAL WOUND ASBESTOS FILLED

304 STAINLESS VVINDINGSAPI -601

BOLTING: 8- 7/8 x 9 TPI B7

ROOT STRESS AREA 0.4285 IN.2

ALLOWABLE STRESS Sa=Sb=25, 000 psi

PRESSURE: 400 psi

HYDROTEST TO 600 psi

TEMPERATURE:72F

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GASKET SEATING LOADS

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GASKET SEATING LOADS

Wm2 = b G Y

b = Effective gasket width = 0.25

G = Gasket mean diameter = 5.25

Y = Gasket seating stress = 10,000 psi

Wm2 = (0.25) (5.25) (10,000)

Wm2 = 41,233 lb.

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M & Y

FACTORS

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Gasket factors (m) for Operating Conditions and Minimum Design Seating Stress (Y)

Seating Width

(See Table)Gaket Material

Gasket

factor

(m)

Minimumdesign

seating

Stress(Y)(psi)

Sketches

and

NotesGasket

GroupColumn

Self-Energizing TypesO-rings, metallic elastomer, and othergasket types considered as self-sealing

0 0

Elastomers without fabric

Below 75A Shore Durometer

75A or higher Shore Durometer

0.50

1.00

0

200

Elastomers with cotton fabric insertion 1.25 4.00

Vegetable fiber 1.75 1100

(1a),

(1b),

(1c),

(1d),

(4),

(5)

Flexicarb based

products

MRG

Flexpro

NR

SR

ST

2.00

2.00

2.00

2.00

2.00

2,500

2,500

2,500

2,500

2,500

Spiral wound metal, with filter graphite

filler3.00 10,000

(1a),

(1b)

Spiral wound metal with PTFE filler 3.00 5,000

ll

GASKET MATERIALS AND CONTACT FACINGS

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Gasket factors (m) for Operating Conditions and Minimum Design Seating Stress (Y)

Seating Width(See Table)

Gaket Material

Gasket

factor(m)

Minimumdesign

seating

Stress(Y)

(psi)

Sketches

andNotes

Gasket

GroupColumn

Corrugated metalwith filler

or

Corrugated metal

jacketed

with filler

Soft aluminum

Soft copper orbrass

Iron or soft steel

Monel or 4%-6%

chrome

Stainless steels

& Nickel basedalloys

2.50

2.75

3.00

3.25

3.50

2900

3700

4500

5500

6500

(1a),(1b)

Corrugated metal

Soft aluminum

Soft copper or

brass

Iron or soft steel

Monel or 4%-6%

chrome

Staimless steel

based alloys

2.75

3.00

3.25

3.50

3.75

3700

4500

5500

6500

7600

(1a),

(1b),

(1c),

(1d)

Flat metal jacketed,

with filler

Soft aluminum

Soft copper or

brass

Iron or soft steel

Monel

4%-6% chrome

Stainless steels

& Nickel basedalloys

3.25

3.50

3.75

3.50

3.75

3.75

5500

6500

7600

8000

9000

9000

(1a),

(1b),

(1c),

(1d),

(2)

GASKET MATERIALS AND CONTACT FACINGS

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Gasket factors (m) for Operating Conditions and Minimum Design Seating Stress (Y)

Seating Width

(See Table)Gaket Material

Gasketfactor

(m)

Minimum

designseating

Stress(Y)

(psi)

Sketchesand

NotesGasket

GroupColumn

Grooved metal

Soft aluminum

Soft copper or

brass

Iron or soft steel

Monel or 4%-6%

chrome

Stainless steels

& Nickel based

alloys

3.253.50

3.75

3.75

3.25

5500

6500

7600

9000

10100

(1a),

(1b),

(1c),

(1d),

(2),

(3)

Solid flat metal

Soft aluminumSoft copper or

brass

Iron or soft steel

Monel or 4%-6%

chrome

Stainless steels

& Nickel based

alloys

4.00

4.75

5.50

6.00

6.50

8800

13000

18000

21800

26000

(1a),

(1b),

(1c),

(1d),

(2),

(3),

(4),

(5)

Ring joint

Iron or soft steel

Monel or 4%-6%

chrome

Stainless steels

& Nickel based

alloys

5.50

6.00

6.50

18000

21800

26000

(6)

l

Notes:

This table gives a list of many commonly used gasketmaterials and contact facings with suggested design

values of m and y that have generally proved

satisfactory in actual service when using effective

gasket seating width b given in the table following. The

design values and other details given in this table are

suggested only and are not mandatory. The surface ofa gasket having a lap should not be against the

nubbin.

Notes:

(1) The gasket factors listed only apply to flanged

joints in which the gasket is contained entirely withinthe inner edges of the bolt holes.

(2) Where serrations do not exceed 1/64" depth and

1/32" width spacing sketches (1b) and (1d) shall be

used.

GASKET MATERIALS AND CONTACT FACINGS

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OPERATING LOADS

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OPERATING LOADS

( )

.550,18

2

factorGasketm

ncompressiocontactJointH

forceendcHydrostatiH

HH

1

21

P

P1

lbW

mPbPGW

W

m

m

m

=

+4

=

=

=

=

+=

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FLANGE DESIGN LOAD

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FLANGE SEATING STRESS

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FLANGE STRESS LOCATIONS

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FLANGE OPERATING STRESS

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TAYLOR FORGE CALC. SHEET

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SECTION VIII, APPENDIX S

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STRESS SUMMARY

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SECTION VIII SUMMARY

PIPE SIZE VS STUD STRESS

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PIPE SIZE VS STUD STRESS150# RF FLANGE SA564 GR630 STUDS-CG TYPE GASKET