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.

Density

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.

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