ASTM A790 UNS S31803 SAF2205 U Bend Tube Bundle ASME Section VIII Certified

Product Specification

Payment Terms	L/C, T/T	Supply Ability	3000 STES / YEAR
Delivery Time	1 - 4 MONTH	Packaging Details	WOODEN CASE, Ply-Wooden Cases with Steel Frames
Tube Types	Straight Tube/U Bend Tube	Components of a Tube Bundle	Tubes, Tube Sheets, Flange, Baffles, Spacers or Support Plates, Tie rods and Specers, End Caps or Channels
Material For Tube	UNS S31803	Origin	China
Application	Heater, Air Cooler, Heat Exchanger, Condenser	Standard	ASME Section VIII Certified
Brand Name	YUHONG	Model Number	TUBE BUNDLE
Certification	ISO 9001-2015	Place of Origin	CHINA
High Light	ASTM B111 copper steel tube bundle ，EN 12452 heat exchanger tube bundle ，C70600 condenser tube bundle

ASTM A790 UNS S31803 SAF2205 U Bend Tube Bundle ASME Section VIII Certified

 

 

 

 

 

Chemical Composition

 

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
2205 (UNS S31803)	Min Max	- 0.030	- 2.00	- 1.00	- 0.030	- 0.020	21.0 - 23.0	2.5 - 3.5	4.5 - 6.5	0.08 - 0.20
2205 (UNS S32205)	Min Max	- 0.030	- 2.00	- 1.00	- 0.030	- 0.020	22.0 - 23.0	3.0 - 3.5	4.5 - 6.5	0.14 - 0.20

 

 

Mechanical Composition

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell C (HR C)	Brinell (HB)
UNS S31803 / 2205	621	448	25	31 max	293 max

 

Physical Properties

 

Grade	Density (kg/m3)	Elastic Modulus(GPa)	Mean Co-eff of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C( J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
UNS S31803 / 2205	782	190	13.7	14.2	-	19	-	418	850

 

Grade Specification Comparison

 

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
2205	S31803 / S32205	318S13	-	1.4462	X2CrNiMoN22-5-3	2377	SUS 329J3L

 

 

 

 

 

 

Components of a Tube Bundle:

 

Tubes:

The primary heat transfer surface.

Made from materials with high thermal conductivity, such as copper, stainless steel, titanium, or carbon steel, depending on the application.

Tubes can be straight or U-shaped, depending on the design.

 

Tube Sheets:

Flat plates that hold the tubes in place.

Tubes are either welded, expanded, or rolled into the tube sheets to create a leak-proof seal.

Tube sheets separate the shell-side and tube-side fluids.

 

Baffles:

Plates or rods that direct the flow of the shell-side fluid across the tube bundle.

Improve heat transfer efficiency by creating turbulence and preventing stagnant zones.

Common types include segmental, helical, and rod baffles.

 

Spacers or Support Plates:

Used to maintain the alignment and spacing of the tubes.

Prevent vibration and damage to the tubes during operation.

 

Tie Rods and Spacers:

Hold the baffles and tube bundle together.

Ensure structural integrity.

 

End Caps or Channels:

Located at the ends of the tube bundle.

Direct the tube-side fluid into and out of the tubes.

 

Design Considerations for Tube Bundles:

 

Tube Diameter and Thickness:

Smaller diameters increase heat transfer efficiency but may lead to higher pressure drops.

Thicker tubes are used for high-pressure applications.

 

Tube Layout:

Tubes can be arranged in triangular, square, or rotated square patterns.

Triangular layouts provide higher heat transfer efficiency, while square layouts are easier to clean.

 

Tube Length and Number:

Longer tubes increase the heat transfer area but may require more space.

The number of tubes depends on the required heat transfer rate and flow rates.

 

Material Selection:

Materials must be compatible with the fluids being processed to avoid corrosion or fouling.

Common materials include stainless steel, copper alloys, titanium, and nickel alloys.

 

Baffle Design:

Baffle spacing and type affect heat transfer efficiency and pressure drop.

Segmental baffles are the most common, but helical baffles can reduce pressure drop and vibration.

 

Thermal Expansion:

Differential thermal expansion between the tubes and the shell must be accounted for to avoid stress and failure.

U-tube or floating head designs are used to accommodate expansion.

 

Types of Tube Bundles:

 

Fixed Tube Sheet Bundle:

Tubes are fixed to the tube sheets at both ends.

Simple and cost-effective but cannot handle large temperature differences between the shell and tube sides.

 

U-Tube Bundle:

Tubes are bent into a U-shape, allowing for thermal expansion.

Suitable for applications with high temperature differences.

 

Floating Head Bundle:

One end of the tube bundle is free to move, accommodating thermal expansion.

Ideal for high-temperature and high-pressure applications.

 

Pull-Through Floating Head Bundle:

Similar to a floating head design but allows the entire tube bundle to be removed for maintenance.

 

Applications of Tube Bundles:

Power Plants: Condensing steam from turbines.

Oil and Gas: Heating or cooling hydrocarbons in refineries.

Chemical Processing: Heat exchange in reactors and distillation columns.

HVAC Systems: Chillers and condensers.

Food and Beverage: Pasteurization and sterilization processes.

 

Advantages of Tube Bundles:

High heat transfer efficiency.

Can handle high pressures and temperatures.

Durable and long-lasting with proper maintenance.

Suitable for a wide range of fluids and applications.

 

Disadvantages of Tube Bundles:

Large physical size and weight.

Higher initial cost compared to some other heat exchanger types.

Requires regular maintenance to prevent fouling and corrosion.

Maintenance and Troubleshooting:

 

Fouling:

Deposits on the tube surfaces reduce heat transfer efficiency.

Regular cleaning (mechanical or chemical) is required.

 

Corrosion:

Material selection and protective coatings can help prevent corrosion.

Inspect for pitting or cracking regularly.

 

Vibration:

Improper baffle spacing or flow rates can cause tube vibration and failure.

Ensure proper design and operation.

 

 

 

 

 

Application

 

 

Acetic acid condenser;

 

Chlor-alkali industrial brine preheater; Seawater cooler (ship/offshore platform);

 

Oil and gas condensate heat exchanger;

 

Multi-effect evaporation (MED) tube bundle for seawater desalination; Biofuel production heat exchanger