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Duplex S31803 Flanges

Duplex S31803 Flanges

Product Details:


Product Description

Duplex S31803 Flanges:

Material Specfication and Dimension Standards:

Product Category

Material Specification as per ASME/ASTM

Forged Flanges

ASME SA182/182M F51, ASTM A182/182M F51

 Size Range:

Dimension Standards

Size Range



1/2" to 24"

150# to 2500#


12" TO 60"

150# to 900#

ASME/B16.47/API 605

26" TO 60"



1" TO 24"

300# TO 2500#

BS 3293

26" TO 48"

150# TO 600#

ASME B16.48 / API 590

1/2" TO 24"

150# TO 2500#


2 1/6" TO 30"

2000 PSI TO 20000 PSI


DN10 TO DN3600

PN6 TO PN160

Notes : We can meet other dimensions outside the above mentioned range in special cases.

 Why choose Us:

  • More than 30 years of expirience in this business
  • You can get stock options, mill deliveries with shortest manufacturing time
  • we assure you of as response in 24 hours (generally in same hour)
  • You will get the right material as per your requirement at the minimum possible price, (beware of unrealistic offers from other vendors)
  • 100% Fulfilment of commitments, if we cannot meet your requirement even after checking all options we will not give false assurance, this helps us in maintaining good relations with our customers
  • We can offer Exworks, FOB, CFR, CIF, Door to Door Delivery prices. We suggest that you let us do the shipping, because it will be cost effective as well as efficient
  • The materials we supply come with full traceability, right from raw material test certificate to final dimensional report. (Reports available on request)


Other Names

UNS S3103

duplex steel, dss steel, duplex stainless steel, F51


Weld Neck Flanges

Blind Flanges

Socket Weld Flanges

Slip On Flanges

Screwed Flanges

Lap Joint Flanges

Long Weld Neck Flanges

Orifice Flanges

Spectacle Blinds

Spacers and Spades

EN Flanges

DIN Flanges

Nipo Flanges

Anchor Flanges

Drip Rings

NozzlesDuplex S31803 Flanges:Material Specfication and Dimension Standards:



  • We supply Duplex Stainless Steel to Pressure Vessel, Tanks and Heat Exchanger Manufacturers used in Chemical Process Plants and Oil and Gas Exploration
  • DSS is used a lot in Marine, Water and Waste Water Treatment Plants
  • Duplex is a big yes for Effluent scrubbing systems

Technical specification:

Material Specification


Material Grades:

UNS S31803, UNS S32750, UNS S32760, UNS S32205, F51, F53, F55

Dimension Standards


Weld Neck Flanges, Slip On Flanges, Blind Flanges, Socket Weld Flanges, Screwed Flanges, Orifice Flanges, Lap Join Flanges, Long Weld Neck Flanges, 150 #, 300 #, 600 #, 900 #, 2500 #

ASME B16.47/B16.48

Spectacle Blinds, Spades, Spacers, Weld Neck Flanges, Blind Flanges, Orifice Flanges

DIN Standard Flanges

EN 1092-1, Type 1, Type 2, Type 11, Type 13, Type 5, PN6, PN10, PN16, PN25, PN40

UNI NORM Flanges

UNI 2276, 2277, 2278, 6089, 6090, 2280, 2281, 2282, 2283, 2284, 2253, 2254, 6092, 6093

DIN NORM Flanges

DIN 2573, 2576, 2642, 2631, 2632, 2633, 2634, 2635, 2565, 2566, 2527


EN 10204 3.1 / 3.2

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