sigraflex ® apx2 hochdruck pdf

SIGRAFLEX® APX2 HOCHDRUCK
SIGRAFLEX APX2 HOCHDRUCK is a multilayer, high-strength
Properties
gasket sealing sheet – designed for high-temperature applica-
SIGRAFLEX APX2 HOCHDRUCK combines the outstanding
tions. The sheet is comprised of 0.020" thick layers of highly
characteristics of both SIGRAFLEX APX2 flexible graphite
oxidation resistant SIGRAFLEX APX2 flexible graphite and
and reinforced sheets manufactured with SIGRAFLEX HOCH-
0.002" thick layers of 316L stainless steel foil, manufactured
with SIGRAFLEX HOCHDRUCK technology.
DRUCK technology:
ʈʈ Increased gasket life and improved operational safety
SIGRAFLEX APX2 HOCHDRUCK was created for end users
in the process industry to cover a broad range of demanding
gasket requirements with a reliable and safe product.
due to the very high temperature resistance
ʈʈ Reliable product characteristics for high operational
reliability
SIGRAFLEX APX2 HOCHDRUCK is specifically designed for
ʈʈ Outstanding maximum permissible gasket pressure
high temperature flat gasket applications.
ʈʈ High blow-out resistance and mechanical strength
ʈʈ Very adaptable sealing material during gasket assembly
Applications
ʈʈ Excellent chemical resistance
ʈʈ Operating temperatures can range from −250 °C up to 480 °C
ʈʈ Long-term stability of assembly load and gasket stress
and to 580 °C ¹⁾ after consulting the manufacturer. Life time
might be limited by the joint design, actual equipment temperatures and operating conditions
ʈʈ All standard piping and vessel flange designs as well as
difficult and highly stressed sealed joints
ʈʈ For one-piece gasket designs up to 59.1" outside diameters;
ʈʈ No measurable cold or warm flow characteristics up to
the maximum permissible gasket stress
ʈʈ No aging or embrittlement (no adhesives or binders)
ʈʈ Very easy to cut into required sealing shapes, even with
conventional cutting equipment/tools
ʈʈ Asbestos-free (no associated health risks)
for gasket diameters over 59.1", a segmented gasket design
is recommended
ʈʈ For internal pressures from vacuum up to 3,600 psi
Assembly instructions
Our detailed assembly instructions are available on request.
ʈʈ For corrosive media
ʈʈ Steam piping and boilers in power generation plants
ʈʈ Heat transfer oil and heating equipment
ʈʈ Sight glass, pumps, fittings and valves
ʈʈ Nuclear power plants
ʈʈ Pulp and paper mills
¹⁾ Please refer to our technical guidelines regarding thermal stability
+
Additional information on our SIGRAFLEX sealing
materials can be found under “Download Overview
SIGRAFLEX” on our homepage.
www.sglgroup.com/sigraflex-downloads
Material data of SIGRAFLEX® APX2 HOCHDRUCK
Typical properties
Units
V15011W3
V20011W3
mm
1.0
1.5
2.0
3.0
m
1.5 x 1.5
1.5 x 1.5
1.5 x 1.5
1.5 x 1.5
g / cm³
1.1
1.1
1.1
1.1
≤ 2.0
Thickness
Dimensions
Bulk density of graphite
SIGRAFLEX
V10011W3
Ash content of graphite (DIN 51903)
V30011W3
%
≤ 2.0
≤ 2.0
≤ 2.0
Total chloride content
ppm
≤ 25
≤ 25
≤ 25
≤ 25
Total sulphur content
ppm
< 300
< 300
< 300
< 300
%/hour
≤ 1.0
≤ 1.0
≤ 1.0
≤ 1.0
Oxidation rate in air at 670 °C
Reinforcing steel sheet details
Flat stainless steel sheet
ASTM material number
Thickness
mm
Number of sheets
Residual stress (DIN 52913) D 16 h, 300 °C, 50 N/mm²
N/mm²
316 (L)
316 (L)
316 (L)
316 (L)
0.05
0.05
0.05
0.05
1
2
3
5
≥ 45
≥ 45
≥ 45
≥ 45
Gasket factors (DIN E 2505 / DIN 28090-1)
Gasket width bD = 20 mm
N/mm²
VU
m
20
20
20
20
1.3
1.3
1.3
1.3
VO
N/mm²
280
270
250
230
BO at 300 °C
N/mm²
230
210
190
170
Compression factors (DIN 28090-2)
Compressibility KSW
30 – 40
30 – 40
30 – 40
30 – 40
Recovery at 20 °C KRW
4–6
4–6
4–6
4–6
Hot creep WSW
< 3
< 3
< 3
< 3
Recovery at 300 °C WRW
3–5
3–5
3–5
3–5
N/mm²
750
750
750
750
2.5
2.5
2.5
2.5
psi
3000
3000
3000
3000
Compressibility (ASTM F36)
%
30 – 40
30 – 40
30 – 40
30 – 40
Recovery (ASTM F36)
%
15
15
15
15
Young's modulus at 20 N/mm² (DIN 28090-1)
ASTM “m”-factor
“y”-factor
Definitions
VU Minimum gasket assembly stress
Recommended gasket assembly stress: ≥ 20 N/mm² up to BO
BU Minimum gasket stress in service, where BU is the product
of internal pressure p and gasket factor m for test and
in service (BU = p · m)
VO Maximum permissible gasket stress at 20 °C
BO at 300 °C Maximum permissible gasket stress in service
m
m = BU /pi
“m”-factor Similar to m, but defined acc. to ASTM, hence different value
“y”-factor Minimum gasket stress in psi
KSW
Compression set under a gasket stress of 35 N/mm²
KRW Gasket recovery after reduction in gasket stress
from 35 N/mm² to 1 N/mm²
WSW Gasket creep compression under a gasket stress
of 50 N/mm² at 300 °C after 16 h
WRW Recovery after reduction in gasket stress
from 50 N/mm² N/mm²
The percentage changes in thickness of KSW, KRW, WSW, WRW
are relative to the initial thickness.
TDS APX2 HOCHDRUCK.00
® registered trademarks of SGL CARBON SE
06 2014/0 E Printed in Germany
This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should therefore not be construed
as guaranteeing specific properties of the products described or their suitability for a particular application. Any exis
ting industrial property rights must be observed.
The quality of our products is guaranteed under our “General Conditions of Sale”.
Graphite Specialties | SGL CARBON GmbH | SGL TECHNIC Inc.
Sales Europe | [email protected]
Sales North America | [email protected]
Sales Asia | [email protected]
www.expanded-graphite.com | www.graphitespecialties.com

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