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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