Page 59 - Pressure Vessel Design Manual

General Design 45

Table 2-3
Gasket Materials and Contact Facings'
Gasket Factors (m) for Operating Conditions and Minimum Design Seating Stress (y)

Mln.
Design we
Gasket Seating Sketches UK
Factor Stress and Sketch Column
Gasket Material m Y Notes Refe~ to Table 2-4
Self-energizing types: 0 rings,
metallic. elastomer or other
gasket lypes considered as
self-sealing 0 0
Elastomers without fabric or a
high percentage of asbestos
fiber:
Below 75A Shore Durometer 0.50 0 0
75A or higher Shore
Durometer 1 .00 200
Asbestos with a suitable binder 1h thick 2.00 ;:z 0
for the operating wndiiions He thick 2.75
%u thick 3.50 6.500
Elastomers with cotton fabric
insertion 1.25
Elastomers with asbestos fabric %ply 1 2.25 2.200
insertion. with or without wire
reinforcement 2-PlY 2.50 3,700 a
l-Pb 2.75
1.100 0
Vegetable fiber 1.75
Spiral-wound metal. asbestos Carbon 2.50 1o.oO0 I
filled I Stainless or Monel 1o.oO0
~~~ ~~~ ~~
Corrugated metal. asbestos Soft aluminum 2.50
inserted or corrugated metal, Soft copper or brass 2.75
jacketed asbemos filled Iron or SOH steel 3.00 :::E
Monel or 4%-6% chrome 3.25 e!zgp
Stainless steels 3.50 6,500
Soft aluminum 2.75 3,700
Soft copper or brass 3.00 4.500
3.25
Corrugated metal Iron or Soft steel 3.25 -
5.500
Monel or 4%-6% chrome 3.50 6,500
Stainless steels 3.75 7,600
Flat metal jacketed asbestos Soft aluminum 5.500
filled Soft copper or brass 3.50 6.500
Iron or soft steel 3.75 (la). (Ib).
::= e (IC). (Id).
Monel or 3.50 9.m e
4%4% chrome 3.75 (2)2
Stainless steels 3.75 9,000
Soft aluminum 3.25 5.500
Soft copper or brass
Grwved metal Iron or soft steel
Monei or 4%-6% chrome
Stainless steels
Soft aluminum
Soft copper or brass
Sohd flat metal Iron or soft steel
Monel or 4%-6% chrome
Stainless steels
Rlng lolnt Monel or 4%-6% chrome
Stainless steels
NOTES:
1. This table gives a list of many commonly used gasket materials 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 Table 2-4.
The design values and other details given in this table are suggested only and are not mandatory.
2. The surface of a gasket having a lap should not be against the nubbin.
Reprinted by permission from ASME Code Section Vlll Div. 1, Table 2-5.1.