Plates Type METAGRAPH – G
Description
Plates made of pure expanded graphite with excellent chemical stability and excellent resistance to creep reinforced with tanged metallic insert.
Applications
Suitable for heavy duty applications with low loads of torque, good for high temperature and pressure cycles or thermal-mechanical shock, steam, chemically aggressive fluids except strong oxidizing agents.
DIN3754
1,2 g/Cm3
Max. work range temperature
with air or oxidizing substance
450°C
Inert fluid but with coupling exposed to air
550°C
Environment of the joint fluid and inerti
800°C
Min. work range temperature
Maximum pressure of security in continuous operation
120 bar
Compressibility
ASTM F36
35%
Elasticity
ASTM F 36
15 / 20 %
Stress retention
DIN52913
48%
Stress relaxation a 400°C
BSI F 125
< 5
Resistance to crushing σvo(RT)
DIN 28090
160 N/mm2
Resistance to crushing σBo (300°C)
DIN 28090
140 N/mm2
Tensile strenght (min.)
ASTM F 104
25 N/mm2
Permeabiity to nitrogen 40 bar, RT
DIN 3535/4
< 0,6 ml/min.
Carbon content
99%
Leachable chloride content
≤ 50 ppm
Leachable fluoride content
≤ 50 ppm
Factors Clamping ROTT test / ASME code
Gb
9.7 N/mm2
a
0,324
Gs
0,00007N/mm2
*The data listed depend on a variety of factors (state of the joints, dimensions, clamping, thermal and mechanical shock etc.) To which can be indicated for orientation purpose.
