Metal - jacketed gaskets are particularly suitable for sealing flat surfaces of heat exchangers, gas pipes, cast iron flanges, autoclaves and similar. By their sealing efficiency, provided by exerting strong pressure on circular rims of the flanges, metal - jacketed gaskets can stand up to 30% deviation from the initial thickness, which is very useful in case of irregular or faulty flange rims. The chemical compatibility of the metal and the medium being sealed should be considered.
Material
ASTM
DIN Material No.
Low Carbon Steel
Soft iron (CS)
1.0333
Stainless steel
AISI 304
1.4301
AISI 316, 316 L
1.4401, 1.4404
AISI 321
1.4541
AISI 316 Ti
1.4571
Monel (NiCu30Fe)
Alloy 400
2.4360
Copper
2.0090
Brass
Brass Ms 63
2.0321
The metallic jacket is normally 0.4 mm thick. Other materials are available on customer request.
Filler
The standard filler material is Flexible Graphite. Other fillers like ceramic, mineral or other can be also used.
SIZE
The metal jacketed gaskets come in sizes according to EN 1514-4, ASME B16.21 standards.
Maximum size:
Outside diameter: up to 4000 mm Thickness: from 2 to 12 mm
MANUFACTURING TOLERANCES
Gasket inside diameter (mm)
Diame t er toler ance (mm)
Inside diameter
Outside diameter
Up to 150
+ 0.8; - 0.0
+ 0.0; - 0.8
from 150 to 1500
+ 1.6; - 0.0
+ 0.0; - 1.6
1500 or greater
+ 2.4; - 0.0
+ 0.0; - 2.4
Gasket Type MATERIAL (Jacket)
k1 [mm] k0xKD [N1 mm]
m
MP 10, MP 12,
Cr-Ni steel
2.0xbD
100xbD
2.0
y [1M0P0a]
MP 16, MP 18, MP 19, MP 22
Soft iron
1.8xbD
70xbD
1.8
70
Cu
1.6xbD
60xbD
1.6
60
Ms
STANDARDS FOR METAL JACKETED GASKETS USED WITH FLANGES
METAL JACKETED GASKETS Standard
Flange Standard
EN 1514-4
EN 1092
ASME B 16.20
ASME B 16.5
ASME B 16.47
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