Stainless Steel U Bend Tubes for Heat Exchanger

Guanyu Steel Tube is specilized Manufacturer of Stainless Steel U Tube in China. Stainless Steel Tubes will process with U bend or other shape according to drawing & specification offer by customers.

Dimensional tolerances U Bend Tube acc. to TEMA R.C.B.

Permissible variations from the specified outside diameter shall not exceed ±0.004 in. [0.10 mm] for tubing under 1.0 in. [25.4 mm] outside diameter nor ±0.006 in.[0.15 mm] for tubing 1.0 in. [25.4 mm] to 1.25 in.[31.7 mm] inclusive. These tolerances do not apply to the bent portion of the U-tubes. At the bent portion of a U-tube for R p 2  D or greater neither the major nor minor diameter of tube shall deviate from nominal by more than 10%. If 11⁄2 D is specified, tolerances could be greater.

1) U Bend Pipes Length of straight part -0/+5 mm
Flattening (also called “ovality”) at the bend shall not exceed 10% of the nominal tube outside diameter.
Wall thickness in bending part acc. to TEMA R.C.B 2.31

2) Permissible variations from the specified minimum wall thickness shall not exceed +20% or −0. The wall thickness of the tube in U-bent section shall be not less than value determined by: tf p T(2R)/(2R+D)
Where: tf p wall thickness after bending, in. [mm],
T p specified minimum tube wall thickness, in. [mm],
R p centerline bend radius, in. [mm], and
D p nominal outside tube diameter, in. [mm].

3) U Bend Tube Radius tolerance
1) for R 100 mm +/- 3 mm
2) for R ≥ 100 mm +/- 5 mm

4). U bend Pipe Straightness tolerance max. 1,5 mm per 1 m
U Bend Tube ends: plain, vertically cut to the tube axis

U Bend Tube OD in mm can be bent upon agreement: 15.8 16.0 17.0 18.0 19.05 20.0 21.3 25.4 26.7 31.8 32.0 38.1mm

U bend Steel Tubing Initial Length
Maximum lengths of 27000mm could be supplied on request

U bend Pipe Bending radius
Minimum: 1.5×OD
Maximum: 1500 mm

The dimensions for heat exchanger tube in special grades may differ from the above,please contact us.

Our U Bend Tube Tube-bending production line, installed at 2007, will allow to produce U-tubes as per specification:

1. ASTM A688/A688M-2017 Specification for Seamless and Welded Austenitic Stainless Steel Feedwater Heater Tubes
2. ASTM A556/A556M-2017 Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes
3. U Bend Tube for Heat Exchanger Specification

U Bend Tube Main Testing Terms and Procedure:

1. Heat Treatment and Solution Annealing / Bright Annealing
2. Cutting to required length and deburring
3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer
4. Visual Test and Endoscope Test for Surface Quality Test
5. 100% Hydrostatic Test and 100% Eddy Current Test
6. Ultrasonic Test subject to the MPS (Material Purchase Specification)
7. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test
8. Impact Test subject to Standard request
9. Grain Size Test and Intergranular Corrosion Test
10. Ultrasoic measuring of Wall Thickness
11. Stress Relieve Annealing on U bend Parts after bending

U Bend Pipe Other details:
a. All tubes are cut to the specified leg lengths and internally cleaned with air, ends are deburred.
b. Before packing, both ends of U-bends are capped with plastic caps.
c. Vertical separators for each radius.
d. Packing lists, covered with plastic, are placed on each plywood case for easy identification of order details, including exact list of radius and lengths inside.

STAINLESS STEEL U TUBES APPLICATIONS

These stainless steel U tube grades are applied to a wide range of industries/markets, due to their overall corrosion resistance and good machinability:

• SS U tubes for Heat Exchangers
• Stainless Steel U Tube for Chemical and petrochemical
• Stainless Steel U Tube used for Power generation
• U Steel Tube for Renewable energy
• U Stainless Steel Tube for Pulp and Paper
• Stainless Steel U Tube for Process piping
• SS U tubes mostly prefered for Mechanical Jobs
• U Stainless Steel Tube used for Pharmaceutical
• steel U tubes for Petrochemical Industries

• seamless U tubes for Us
• Stainless Steel U Tube applications for Food and beverage
• Stainless Steel U Tube used for Oil and gas
• Stainless Steel U Tube applications in Mining
• Stainless Steel U Tube used for Water/waste
• Stainless Steel U Tube application for Marine Industry
• SS U Tube application for Fertilizers
• Steel U tubes for CNG Piping Jobs
• Stainless steel U tubes used in Instrumentation Jobs
• Stainless steel U tubes for Desalination Plants

AVAILABLE STOCK OF SS U TUBE

STAINLESS STEEL U TUBE PRICE LIST

• 304 Stainless Steel U Tube
  FOB Price: US $1500-3000 / Ton
• 304 Stainless Steel U Tube Polishing Machine
  FOB Price: US $1500-3000 / Ton
• Stainless Steel U Tube 38mm
  FOB Price: US $1000-2200 / Ton
• U stainless steel tube for sale
  FOB Price: US $2200-3500 / Ton
• High Quality 316 316L 304L 304 Stainless Steel U Tube Price
  FOB Price: US $1400-2500 / Ton
• Stainless Steel U Tube
  FOB Price: US $1300-2100 / Ton
• 316l Stainless Steel U Tube
  FOB Price: US $1200-2200 / Ton
• 316L U Stainless Steel tube
  FOB Price: US $2200-3000 / Ton
• high quality seamless U Tube 316 stainless steel
  FOB Price: US $1700-2500 / Metric Ton
• 201 Stainless Steel U Tube
  FOB Price: US $1200-3000 / Metric Ton
• Factory wholesale Stainless Steel U Tube 304 for sale
  FOB Price: US $3-8 / Kilogram
• 201 316 stainless steel U Tube
  FOB Price: US $1200-2200 / Ton
• stainless steel 304 seamless U Tube
  FOB Price: US $1-4000 / Ton
• price of Stainless Steel U Tube
  FOB Price: US $900-6000 / Metric Ton
• Stainless Steel U Tube price
  FOB Price: US $1500-2500 / Metric Ton

• U Bend Tube
  FOB Price: US $100-1000 / Ton
• China new 304 Stainless Steel U Tube price per meter
  FOB Price: US $2-2.5 / Kilogram
• hot rolled U stainless steel Tube
  FOB Price: US $1500.0-2300.0 / Metric Tons
• Stainless Steel Welded Galvanized U Tube
  FOB Price: US $1-30 / Kilogram
• U tubing 200 300 400 series Stainless Steel U Tube
  FOB Price: US $1100-3500 / Ton
• Welded Stainless Steel U Tube
  FOB Price: US $790-1900 / Ton
• 201 Large Diameter Stainless Steel U Tube
  FOB Price: US $1000-3000 / Ton
• Hot Sale and Factory Price AISI 201 304 430 stainless steel series U Tubes competitive price
  FOB Price: US $800-2000 / Metric Ton
• 304 Welded Stainless Steel U Tube Manufacturer
  FOB Price: US $780-1690 / Ton
• China Manufacturers U Stainless Steel Tubing
  FOB Price: US $1200-2500 / Ton
• high quality U stainless steel Tube
  FOB Price: US $1-15 / Kilogram
• SS304/316 Stainless Steel U Tube
  FOB Price: US $1600-2800 / Ton
• Stainless Steel U Tube manufacturers price
  FOB Price: US $1000-4500 / Ton
• 201 304 316 Stainless Steel U Tube, Stainless Steel U Tube price manufacturer
  FOB Price: US $1000-3500 / Ton