Duplex Pipes
Request a Quote>Product Description:
Duplex stainless steel pipes are with high mechanical strength, good elongation and weld ability which needs no pre-heating before welding and heat treatment after welding, low thermal expansion, excellent resistance to stress corrosion cracking, pitting and crevice corrosion, and high resistance to general corrosion in different environments. Duplex stainless steel tubes & pipes are applied to heat exchangers in refinery industries, petrochemical plants, paper & pulp industries, sugar & beverage industries.
Standards:ASTM/ASME A789/SA789, A790/SA790
Grade: UNS S32750, S31803, S32760 etc.
Duplex stainless steel pipes are with high mechanical strength, good elongation and weld ability which needs no pre-heating before welding and heat treatment after welding, low thermal expansion, excellent resistance to stress corrosion cracking, pitting and crevice corrosion, and high resistance to general corrosion in different environments. Duplex stainless steel tubes & pipes are applied to heat exchangers in refinery industries, petrochemical plants, paper & pulp industries, sugar & beverage industries.
Standards:ASTM/ASME A789/SA789, A790/SA790
Grade: UNS S32750, S31803, S32760 etc.
Chemical Composition
|
Grade
|
C
max
|
Si
max
|
Mn max
|
P
max
|
S
max
|
Cr
|
Ni
|
Mo
|
N
|
Cu
|
|
S32750
|
0.030
|
0.8
|
1.2
|
0.030
|
0.015
|
24.0-26.0
|
6.0-8.0
|
3.0-5.0
|
0.24-0.32
|
0.5max
|
|
S31803
|
0.030
|
1.0
|
2.0
|
0.030
|
0.020
|
21.0-23.0
|
4.50-6.50
|
2.50-3.50
|
0.08-0.20
|
|
Physical Properties
|
Grade
|
Y.S.MPa min
|
T.S.Mpa min
|
Elongation %
|
Hardness HRC
|
|
S32750
|
550
|
800
|
15
|
31
|
|
S31803
|
450
|
620
|
25
|
31
|
Marking: JW, material grade, standard, specification, heat no.
Length: unbending length or fix length
Package:knitting strip bundle, wooden box or steel box
Mill test certificate: according to EN 10204 3.2
Value added service：
Third party inspection
Bright annealed, polished outside and inside surface
Third party inspection
Bright annealed, polished outside and inside surface
Size range for duplex pipes
|
W.T.(mm)
|
1
|
1.2
|
1.5
|
1.65
|
2
|
2.11
|
2.5
|
3
|
3.5
|
4
|
4.5
|
5
|
5.5
|
6
|
6.5
|
7
|
7.5
|
8
|
8.5
|
9
|
10
|
|
O.D.(mm)
|
|||||||||||||||||||||
|
15
|
|
|
|
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|
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|
|
16
|
|
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|
|
|
|
|
|
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|
18
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
19.05
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
|
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|
|
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|
22
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|
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|
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|
|
|
|
|
|
|
25.4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
31.8
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
35
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
38.1
|
|
|
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|
|
|
|
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|
|
|
|
|
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|
|
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|
42
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
45
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
50.8
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
55
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
60
|
|
|
|
|
|
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|
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|
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|
|
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|
|
|
|
|
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|
65
|
|
|
|
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|
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|
|
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|
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|
|
|
|
|
|
|
|
|
|
70
|
|
|
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|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
75
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
80
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
90
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
101.6
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
114.3
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
121
|
|
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|
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|
127
|
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|
|
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|
133
|
|
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|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
141.3
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
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|
159
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
168.3
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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For sizes other than given, please check with our office for further confirmation.
