SIGRAFLEX® HOCHDRUCK PRO is a multilayer high-strength graphite
sealing sheet comprising 0.5 mm thick layers of high-purity graphite
foil and 0.05 mm thick stainless steel foils. Depending on the sheet
thickness required, several layers of graphite and stainless steel foil
are joined together in a patented adhesive-free process. As a result,
the sheets have outstanding mechanical properties. The sealing
sheet is impregnated to reduce leakage and improve handling.
SIGRAFLEX® HOCHDRUCK PRO allows end users in the process
industry to cover almost their entire gasket application range with a
reliable and safe product.
API 6FB Fire Safe, TA Luft, DVGW, BAM, Blow-out resistance (TÜV at 2.5 times
the nominal pressure)
Service
For difficult and mechanically highly stressed sealed joints (in tongue-and-groove and special-dimension flanges, process equipment, heat exchangers); also suitable for all common pipework and vessel flange designs
Recommended for one-piece gaskets up to 1500 mm outside diameter; for diameters over 1500 mm as two-layer structures with segmented sections and staggered joints, for instance
For high internal pressures of up to 250 bar
For corrosive media
Suitable for a broad range of temperatures from – 250 °C to approx. 550 °C under considerationof the chemical resistance; for applications at more than 450 °C, users should request our advice
Gaskets for the chemical, petrochemical and nuclear industry as well as refineries
Steam pipework and boilers in power stations
Heat transfer oil and heating facilities
Inspection glasses, pumps, fittings
Existing plants
Material Properties
Color
Black/gray, purple printed
Thickness
1.5 mm
Sheetsize
1.5 x 1.5 / 1.0 x 1.0 m
Typical Physical Properties
Density
1.1 g/cm³
ASTM F36A Compressibilty
30 – 40 %
ASTM F36A Recovery
30 – 40 %
BS 7531 Residual Stress
> 48 N/mm²
Ash content of graphite (DIN 51903)
< 0.15 %
Total chloride content
< 10 ppm
Gaskets Constants
m (ASME)
2.5
Y (ASME)
2000 psi
Approvals and test reports
API 6FB Fire Safe
TA Luft
DVGW
BAM
Blow-out resistance (TÜV at 2.5 times the nominal pressure)
