Duplex Stainless Steel Pipes : Manufacturer, Stockist & Supplier : Kinnari Steel

Duplex Stainless Steel Pipes : Manufacturer, Stockist & Supplier : Kinnari Steel

Duplex Stainless Steel Pipes are in huge demand due to their multiple applications. Kinnari Steel are Duplex Stainless Steel Pipe Manufacturer, Duplex Stainless Steel Pipe Stockiest & Duplex Stainless Steel Pipe Supplier.

Duplex Stainless Steel Pipes

Kinnari Steel is one of the major manufacturers of Duplex Stainless Steel Pipes in the industry. For more than 20 years, we have been providing excellent quality pipes to Chemical industry, construction industry, heat treatment industry and oil and natural gas industry among others. Our customers are based not only in India but abroad as well. We have exported products to more than 55 countries and are continuously reaching newer heights.

With the support of our state-of-the-art manufacturing facility, we are able to manufacture a vast range of highly precise products. We make use of highly efficient processed through which we offer Duplex Stainless Steel Pipes in all shapes, sizes, and specifications. We highly emphasize on client servicing and provide extraordinary value added services to them. We have the largest inventory in the country and are thus able to carry out the fastest delivery of products. We are a greatly trusted brand in the industry and are highly recommended by all our clients.

Duplex steel is one of the most consumed grades of steel. It is used in regions where austenitic stainless steel is not suitable. It is a cheaper alternative for corrosion resistance to various nickel-based alloys.

Kinnari Steel is a manufacturer and supplier of premier quality Duplex Stainless Steel Pipes. Duplex Stainless Steel Pipes are subject to very stringent scrutiny and inspection. In fact, it is the single highest selling product of Kinnari Steel. We have more than 1200 tons of Duplex Stainless Steel Pipes from ½” to 16” in ready stock for immediate dispatch.

Kinnari Steel has more experience of working with Duplex steel than any other company in India. We have a huge quantity of Duplex Stainless Steel Pipes in ready stock for immediate dispatch at any time. The price is very competitive. However, our main focus is on providing impeccable delivery. Also, we provide value addition to the client in the form of the cut to length size, slitting, shaping, and fabrication, superior finishing, marking, beveled end, specialized cap protection. A client who buys Duplex at KSC has always given a repeat order since the requirement is always repetitive and timely. We boast to be the #1 company to sell duplex steel pipes.

Want to Buy Duplex stainless steel pipes? ? Contact Us 

What is Duplex Stainless Steel?
Duplex Stainless Steel is a type of steel containing the high amount of chromium and minimum amount of nickel. It provides great strength and resistance to corrosive environments. It is used in desalination plants, heat exchangers, and marine processes.

Duplex Stainless Steel is a type of austenitic stainless steel that comprises of nickel and chromium majorly, along with other elements like nitrogen and molybdenum. This stainless steel alloy offers good resistance to localized as well as to uniform corrosion. The duplex microstructure of the alloy contributes to the high strength and high resistance to stress corrosion cracking. It has good weld ability and offers many beneficial properties of ferritic and austenitic steels combined.

Duplex Stainless Steel gives very good resistance to pitting and crevice corrosion and has high resistance to stress corrosion cracking and corrosion fatigue. It displays high mechanical strength and also provides good abrasion and erosion resistance. It is used in chemical, Oil and gas and marine industries. Other uses if the duplex stainless steel is in pollution control equipments, pulp & paper manufacturing, seawater desalination plants and in flue-gas cleaning to name a few.

Typical Properties:

  • Low cost
  • Alternative to high nickel based alloys
  • High strength
  • Corrosion resistant
  • Very hard machining

Specification: ASTM A790 (Seamless Pipes) ASTM A928 (Welded Pipes)

Inconel Pipes


Duplex Stainless Steel Pipes are highly durable pipes that offer excellent strength and superb and corrosion resistance. They provide good resistance to chloride pitting and crevice corrosion. These pipes are a cost-effective solution for many applications where other stainless steels are susceptible to chloride stress corrosion cracking. The special properties of these pipes make them useful in services such as in marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications
Typical uses of Duplex Stainless Steel Pipes are in oil and gas equipments, offshore technology, seawater desalination plants, chemical industry, flue-gas cleaning, desalination plants and seawater systems and pulp and paper industry. Other uses of these pipes are in Cargo tanks and pipe systems in chemical tankers, Firewalls and blast walls on offshore platforms, Bridges, Storage tanks, Pressure vessels, reactor tanks, and heat exchangers and Rotors, impellers and shafts.



% 2205 UR52N+
C 0-0.03 0.03 max
Mn 2.0 1.5
Si 1.0 0.8
P 0-0.03 0.035
S 0-0.02 0.02
Cr 21-23 24-26
Mo 2.5-3.5 3.0-5.0
Ni 4.5-6.5 5.5-8.0
N 0.08-0.2 0.2-0.35
Cu 0.5-3.0


Grade 2205 UR52N+
Tensile Strength (MPa) 620 770
Proof Stress 0.2% (MPa) 450 550
Elongation A5 (%) 25 25


Property 2205 UR52N+
Density (g.cm3) 7.805 7.810
Modulus of Elasticity (GPa) 200 205
Electrical Resistivity (Ω.m) 0.085×10-6 0.085×10-6
Thermal Conductivity (W/m.K) 19 at 100°C 17 at 100°C
Thermal Expansion (m/m.K) 13.7×10-6 to 100°C 13.5×10-6 to 200°C


Typical applications include:
  • Oil and gas equipment
  • Offshore technology
  • Seawater desalination plants
  • Chemical industry, especially when handling chlorides
  • Flue-gas cleaning
  • Desalination plants and seawater systems
  • Pulp and paper industry
  • Cargo tanks and pipe systems in chemical tankers
  • Firewalls and blast walls on offshore platforms
  • Bridges
  • Storage tanks
  • Pressure vessels, reactor tanks, and heat exchangers
  • Rotors, impellers, and shafts

Should you buy Duplex Stainless Steel Pipes?

If you are looking to operate in environments which have a lot of salt water, regular grades of stainless steel will corrode in very less time. Duplex Stainless Steel Pipes are an ideal choice for any company. This is because of its excellent yield to salty environments. It is majorly used in desalination plants in countries whose sea has a lot of salt water. It is also used in heat exchanger plants and several marine applications. Usage of duplex steel as an alternative where suitable can help the client save the enormous amount of time, money and value due to the specialized chemical properties of duplex stainless steel.

Write to our technical consultant to know more about Duplex Stainless Steel Pipes.

About Kinnari Steel

Kinnari Steel is the biggest manufacturer and supplier of Duplex Steel Pipes in India. We stock more than 1200 tons of Duplex Stainless Steel Pipes. It is the single highest selling product of Kinnari Steel. Our Duplex Stainless Steel Pipes are used by several European, Africa, and Gulf-based companies. This is because of the instant delivery we provide to our customers. We claim the fastest delivery of Duplex Stainless Steel Pipes, due to the highest amount of ready stock for immediate dispatch at client disposal. An order is processed immediately against the receipt of the purchase order in our system. Subsequently, a team is assigned the work for instant packing, and we dispatch the goods against the receipt of Bank Transfer.

Duplex is a nonstandard and popular grade of stainless steel. It is very hard and difficult to manufacture. However due to low nickel composition, it is a cheaper alternative to high nickel based alloys. It must be only procured from trusted vendors.

Kinnari Steel is a leading distributor of Stainless Steel and Alloy Steel Products. We have been involved in manufacturing and supplying stainless steel 316 pipes since 2 decades. We hold great expertise in sourcing needs of clients for nickel based Alloys. Our aim is to provide best services in the industry and over the years we have gained much prominence due to propulsion and expertise in high nickel alloys. We thus handle each of our clients’ queries with great sincerity and help them figure out their requirements.

In order to maintain the highest standards of quality we make sure that each and every unit is individually inspected and tested, thereby cropping out the scope of any sort of anomaly. Great emphasis is placed on making our products in an environment-friendly way and prevents any kind of harm to nature. We are known across our clients for fast delivery of high products and we have a very low rejection rate. We put great efforts in catering to the needs of our clients and thus we have a huge base of happy customers.
Our head office is located in Mumbai. Kinnari Steel Corporation is certified by ISO 9001: 2008 for continued excellence in providing impeccable quality products to its customers.


  • Nonavailability of products
  • Late deliveries of goods
  • Poor/Unprofessional Packing
  • No control on quality and testing
  • High rejection rate
  • Poor after sales service
  • Supply of wrong grades
  • Material inconsistent with ASTM Standards
  • Very hard material for use
  • Dubious Practices
  • Lack of knowledge
  • Product fails under high pressure
  • High pricing of the goods due to supplier commission
  • Weld repair of goods

In our experience, customers face the following problems in purchase of dDuplex Stainless Steel Pipes :

  • Ambiguity between UNS S31803 and UNS S32205
  • Hardness not acceptable as per ASTM Standards
  • Size not in stock
  • Unacceptable surface finish
  • Linking on the inner diameter of the pipe
  • Poor packaging
Duplex Stainless Steel Pipes


  • Our customers undergo a World class buying experience with us
  • We are highly preferred for out fastest delivery service
  • We provide Mill test report in accordance with EN10204 NACE 3.1, NACE 3.2
  • 3rd Party inspection is carried out
  • Our products offer High-pressure sustainability
  • Product replacement warranty is given
  • We offer High-quality packaging and Packing for sea and Air transport
  • We assist Same day shipping of the goods
  • We have the Highest stock in the country
  • We follow Stringent Quality Testing and Control
  • Our products have ISO 9001:2008 , ISO 14001:2004, OHSAS 18001:2007 Certifications
  • We have <1% rejection rate of the goods in over a decade
  • We are distributors in more than 13 countries
  • Competitive pricing is offered
  • We hold a High experience in working with Nickel-Based Alloys
  • Our Consultancy for alternate sizes and material are highly talked about
  • We provide Heat Number Traceability on all products

These are the bare minimum problems any company must aim to solve. We do not aim to solve these problems. There are not even problems by virtue of buying duplex pipes at Kinnari Steel. Our main focus is providing impeccable service to clients. We add value to the kind of goods we provide. Standard pipe length is the 5-7 meter, but we provide custom length and size to clients for small requirements.

The value additions we provide at Kinnari Steel for Duplex Stainless Steel Pipes are:

  • Highest stock in the country
  • Fastest delivery in 3 days
  • After sales service
  • Product replacement guarantee
  • Limited lifetime product warranty
  • Third party inspection
  • NACE Certifications
  • KSC Buying Experience
Duplex Stainless Steel Pipes

Case Study:

By now we know, Duplex Stainless Steel Pipes are most used around areas which have salt in the water. The liquids must undergo desalination before a process can be undertaken.
A company in Great Britain approached us for 7 tons of Duplex Stainless Steel pipes and fittings. The problem being, he needed the goods in urgency. He went around the world to look for suppliers, as he could not find it in stock in the UK. Next thing, he has quotes from 20+ companies around the world.

Our rates were one of the most competitive ( top 5) , but we beat all the companies in terms of delivery time committed. The difference between the 2nd best and ours was 3 times the actual time we committed to the client. Not to mention his cost was 2-3 times higher than ours.

Naturally after due diligence we got the order. We processed the goods on priority for fittings. Duplex Stainless Steel Pipes were in ready stock. The goods went to the UK by a chartered aircraft due to the urgency and high volume, weight. The client regularly buys Duplex Stainless Steel Pipes from us.
At Kinnari Steel, we strive for excellence in expert quality and service to customers. All our emphasis is on delighting the customer. The experience of buying with us must be a memorable one. Procurement of pipes must not be the worry of the customer. He must be already preoccupied with several burdens of projects. The procurement experience must be trusted. This is the reason we have emerged as the top company for the supply of UNS S31803 AND UNS S32205 Pipes.
At Kinnari Steel, we take both large and small orders for Duplex Stainless Steel Pipes owing to customer requirements. All activities are client demand driven.
Trust is what we aim to achieve, and it is the reward for the service we provide.

Send us your requirement for Duplex Stainless Steel Pipes. Contact Us 

Types of Duplex Steel Pipes Pipe

Duplex Stainless Steel Pipe : Manufacturer, Stockist and Supplier : Kinnari Steel
KSC is manufacturer & supplier of Duplex Stainless Steel pipe. Click here if you want to buy duplex pipe or want to learn about duplex steel pipe
Brand: KSC
Manufacturer: Kinnaristeel
Model: Pipe
Product ID: DSS-P

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