Payment & Shipping Terms:
|Material Grade:||304/304L||Size Range:||5/8'' X 0.035'' X U|
|Specification:||ASME SA688 ASTM A688||Finishing Options:||Bright Annealing, U Bend|
|Test Certificate:||EN10204 3.1||Packaging:||Wooden Boxed|
u bend tube,
welded finned tubes
ASME SA688 TP304/304L 15.875 X 0.89MM Welded Stainless Steel U Bend Tubes for Feedwater Heaters
Spezilla offers ASME SA688 welded U bend stainless steel tubeS for feedwater heater, Austenitic stainless steel and Ferritic stainless steels, surface condition in annealing and pickling, or bright annealing finishing, used in heat exchanger, boiler, condenser, heat transfer system.
ASTM A688 / A688M covers seamless and welded Austenitic stainless steel feedwater heater tubes including stainless steel U bending tube for application in tubular feed-water heaters, the tubing sizes covered shall be 5⁄8 in to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall thicknesses of 0.028 in. [0.7 mm] and heavier.
ASTM A688 U Bend Stainless Steel Tube Specification
Heat treatment shall be applied to the U-bend area plus approximately 6 in. [150 mm] of each leg beyond the tangent point of the U-bend after bending, if specified.
Straight length: max 30000 mm
Leg length: 12000 mm, points of tangency of the bend to the leg end
Bending radius: max 1500 mm
Manufacturing method: Welded, Cold Drawn.
Straight length equal to 2 x leg length + 3.1416 x R
Traceability – All material is fully heat and lot traceable, allowing us to track products from raw material to finished goods.
100% testing for reliability and safer installation - Every foot ofTubing undergoes 100% hydrostatic testing and positive material identification.
|Tube OD.:||6.00MM - 25.40MM|
|Wall:||0.5MM - 1.65MM|
|Type:||Welded & U Bend|
|Mill Test Certificate:||EN10204 3.1|
Chemical composition reference analysis (as weight %)
|C||≤ 0,08||≤ 0,035|
|P||< 0,040||< 0,040|
|S||≤ 0,030||≤ 0,030|
|Si||≤ 1,0||≤ 1,0|
|Mn||≤ 2,0||≤ 2,0|
|Cr||18.00 – 20.00||18 – 20|
|Ni||8.00 – 11.00||8.00 - 13.00|
Mechanical values at room temperature
|Tensile strength N/mm²||525.00||485.00|
|Tensile yield point Rp 0,2 N/mm²||205.00||170.00|
|Elongation at break A5 %||35.00||35.00|
Available Tube Product Forms:
U-bend tubes are widely used in heat-exchanger systems. Heat-exchanger equipment on the basis of seamless stainless U-tubes is essential in strategically important and critical fields — nuclear and petrochemical machine building.
Spezilla's stainless steel u bend tubes are produced acc. to the following process and inspection to assure our quality:
1. Chemical Composition Analysis Test With 100% PMI.
2. Solution Annealing / Bright Annealed.
3. 100% Hydrostatic Test and 100% Eddy Current Test
4. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test.
5. Impact Test subject to Standard request.
6. Grain Size Test and Intergranular Corrosion Test.
7. Visual Test and Endoscope Test for Surface Quality Test
Typical Manufacturing Specifications:
Also individual customer specifications.
Contact Person: Will Ma
Tel: +86 13918539222