Duplex & Super Duplex Flanges

Calico Metals offers superior quality Duplex and Super Duplex Flanges to all its valuable customers all around the world. Duplex flanges are appreciated for the applications where there is requirement of corrosion resistance and exceptional strength and is the material having 4% molybdenum, 25% chromium and 7% nickel. Duplex flanges have excellent resistance cracking caused by chloride stress corrosion, a low thermal expansion coefficient and high thermal conductivity. The super duplex flanges have unique quality finishing, high pressure, duress for long life and zero defects.

Category: .

There is a great connectivity to pipes in Super Duplex flanges they have long life in the applications having low to high pressure like refinery industry. Their corrosion resistance levels are also very high and therefore they are well preferred in the chemical and marine industries. The Duplex & Super Duplex Flanges are exceptionally useful for the applications such as:

  • Equipments of oil and gas industry.
  • Offshore oil production
  • Equipment of pulp and paper mill
  • Desalination plants
  • Marine applications
  • Structural and mechanical equipments
  • Heat exchangers
  • Power industry
  • High pressure seawater piping and RO plants
  • Fire fighting systems

1/2″ NB TO 48″NB.

UNS S31803, S32205 (2205),S32750 (2507), S32760 (Z-100)
S32900 (329), S32304, F-51, F-53, F-54, F-55 & F-60 & HIGH NICKEL ALLOYS

Duplex and Super Duplex Weldneck, Duplex and Super Duplex Slipon, Duplex and Super Duplex Blind, Duplex and Super Duplex Socket Weld, Duplex and Super Duplex Lap Joint, Duplex and Super Duplex Spectacles, Duplex and Super Duplex Ringjoint, Duplex and Super Duplex Orifcase, Duplex and Super Duplex Long Weldneck, Duplex and Super Duplex Deck Flange, etc.

MR 01-75, MR 01 03

150#, 300#,400 #,600#,900#, 1500# & 2500 #.


  • Annealed
  • Anodising
  • Casting
  • Centreless Grinding (CG)
  • Drilling
  • Electroplating
  • Forging
  • Heat Treatment (Hardening & Tempering)
  • Machining (CNC)
  • Pickled
  • Polish (Electro & Commercial)
  • Threading (As per Guage)
  • Welding

Our Materials Are Tested To Relevant Standard And Wherever Possible We Give Original / Copy Of Test Certificate With Heat Number As Well As Govt. Approved Laboratories Test Certificate Can Also Be Provided. We Supply the Material under Inspection of Any Third Party Inspection Agency as per the Client’s Requirements Such As :
1) Bv- Bureau VERITAS Industrial Services (India) Pvt. Ltd
2) Lloyds Inspection Agency
3) Rina
4) Irs – International Register Of Shipping (Irs)
5) Dnv – Det Norske Veritas
6) Tcs – Tata Consultancy Services
7) Tuv India


There are no reviews yet.

Be the first to review “Duplex & Super Duplex Flanges”