ASME SA789 UNS S32205 Duplex Steel Heat Exchanger U Bend Tube

ASME SA789 UNS S32205 Duplex Steel Heat Exchanger U Bend Tube is a tube made from a duplex stainless steel (grade S32205 or 2205) that is U-shaped for use in heat exchangers, conforming to the ASME SA789 standard. This material combines high strength and superior corrosion resistance, particularly against pitting and chloride stress corrosion cracking, making it ideal for corrosive environments like those found in the oil, gas, and chemical industries. The U-bend is formed by bending a straight tube, often with a mandrel to control wall thinning, and the entire tube is manufactured and tested to meet the rigorous standards of ASME SA789.

 

UNS S32205 Duplex Steel U-Bend Tube maintains structural integrity and corrosion resistance in operating temperatures from cryogenic to 300℃ (572℃F). Its duplex (ferrite-austenite) structure resists thermal fatigue, ensuring reliability in high-frequency U-bend applications such as heat exchangers and power plants.

 

 

Equivalent Grade of S32205 Duplex Steel Tubing

2205	S31803 / S32205	318S13	-	1.4462	X2CrNiMoN22-5-3	2377	SUS 329J3L

 

ASTM A789/ASME AS789 Duplex Steel Tubing Chemical Requirements

	C		P	S					N
S31803	0.03	2	0.03	0.02	1	4.5-6.5	21-23	2.5-3.5	0.08-0.2	...	...
S32205	0.3	2	0.3	0.2	1	4.5-6.5	22-23	3-3.5	0.14-0.2	...	...
S32750	0.03	1.2	0.035	0.02	0.8	6-8	24-26	3-5	0.24-0.32	0.5	...
S32760	0.3	1	0.03	0.01	1	6-8	24-26	3-4	0.2-0.3	0.15-1	W 0.5-1

 

Mechanical Properties of 2205 duplex stainless steel tubes

		Yield Strength (0.2%Offset)	2205 Duplex SS Pipe Tensile Strength
7.8 g/cm3	1350 ℃ (2460 ℃F)	Psi - 80000 , MPa - 550	Psi - 116000 , MPa - 800	15 %

 

Outside Diameter of 2205 Duplex Steel Boiler Tube

	6.00mm to 610mm	0.6 mm to 60mm

 

It is ideally suited for critical environments such as seawater cooling systems, chemical reactors, oil-to-gas heat exchangers, and high-purity process piping, where a combination of corrosion resistance, strength, and durability is essential.

 

 

S32205 Duplex Steel U-Tube Delivery Condition

The tubes meet the requirements of relevant standards, and the heat treatment is consistent with the tube manufacturing method and the steel's chemical composition.

When ordering, the method and method of temporary surface protection for the tubes during transportation and storage must be agreed upon. Tubes may be delivered without temporary surface protection or with an agreed-upon corrosion inhibitor.

We maintain a large inventory of duplex steel S3220 U-tubes for heat exchangers. Contact us for free samples and a stock list.

2205 U Tube Bundle Heat Exchanger Technical Parameters

	2205, 2507,304,316,316L
	1.5* outside Diameter;Maximum radius treated 1500mm
	15,8 - 16,0 - 17,0 - 18,0 - 19,05 - 20,0 - 21,3 - 25,4 -26,7 - 31,8 -38,1.
	15* outside Diameter
	+- 5
	0.8mm-23mm;