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Duplex stainless steel pipes are charactrized by good resistant to the cracking caused by chloride stress corrosion in austenitic grades, and have improved resistance to localised corrosion, very high mechanical strength. Younglee's factory of seamless tubes manufactures high quality duplex stainless steel pipes and tubing in a wide range of duplex stainless steel grades. Details as below:
1) Product standards:
Duplex stainless steel pipes are usually manufactrued and inspected under below standards:
- EN 10216-5 TC1/TC2
- ASTM A789,ASTM A790
- PED 97/23/EC, AD 2000
- NACE MR0175
Other requirements, standards on customers requests.
2) Size range:
Younglee is able to produce duplex pipes / duplex piping with O.D 10 mm to 219 mm, wall thickness 0.5mm to 15mm.
Duplex pipes are delivered in straight length up to 15 meters, or in U bend types as U bend duplex pipes.
3) Materials / steel grades:
Duplex stainless steel pipe is avaible in AISI standards and EN/DIN standards, and other standards on customers' requests.
UNS: S31500,S31803,S32205,S32760,S32750
EN /DIN: 1.4462, 1.4510,
4) Advantages:
Duplex stainless steel pipes have many advantages as:
- High corrosion resistance;
- Significantly more uptime than carbon steel pipes and conventional stainless steel pipes
- High mechanical strength
- Lighter constructions, more compact system design and less welding.
5) Application:
Duplex stainless steel pipes seamless are mainly used in heat exchanger tubes, umbilicals, structural tanks, pulp and paper making equipment, and seawater handling systems..
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