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ASME SA688,ASME SA556-U Tube for Heat Exchanger

  • ASME SA688,ASME SA556-U Tube for Heat Exchanger
  • ASME SA688,ASME SA556-U Tube for Heat Exchanger
  • ASME SA688,ASME SA556-U Tube for Heat Exchanger
  • ASME SA688,ASME SA556-U Tube for Heat Exchanger
  • ASME SA688,ASME SA556-U Tube for Heat Exchanger
Model No.︰-
Brand Name︰-
Country of Origin︰-
Unit Price︰US $ 2200 / MT
Minimum Order︰10 MT
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Product Description
  Dimensions (mm)      
Products   O.D. W.T. Length Standards Materials Remarks
U-bent Tubes for heat exchanger 12.7-76.2mm(1/2”-3”) 0.5-5.16mm (0.02”-0.203”)  Leg Length     12.5m (41’)                          27mmax.dev.Length 88’) ASTM/ASME A/SA179, 192, 210 A/SA179,192, 210 A1  
ASTM/ASME A/SA213 T5, T11,T12, T22, T9, T91                              TP304/304L, TP304H, TP316/316L, TP347/347H, TP316Ti, TP321/321H, TP310S Seamless Ferritic and Austenitic Stainless Steel U-bent Tubes
ASTM/ASME A/SA249 TP304, TP304L, TP316, TP316L…  Welded Stainless Steel U-bent Tubes
ASTM/ASME A/SA789 SAF2205/UNS S31803/32205, SAF2507/UNS S32750… Duplex Stainless Steel U-bent Tubes
ASTM/ASME A/SA163 Monel400, Inconel600, 625, Incoloy800/800H, 825…  Seamless Nickel Alloy U-bent Tubes
ASTM/ASME A/SA268 TP405, TP409, TP410, TP430 Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes
ASTM/ASME B/SB395/111 C44300, C68700, C70600, C71500  Seamless Copper Alloy U-bent tubes
ASTM/ASME B/SB338 Gr.2, 7, 9, 12 Seamless Titanium Alloy U-bent Tubes
 Seamless and Welded Stainless Steel Low Pressure Feed Water Heater(FWH) U-bent Tubes 12.7-25.4    (1/2”-1”) 0.7-3.05    (0.028”-0.12”)  Leg Length     12.5m (41’)                           27m(max.dev.Length 88’) ASTM/ASME A/SA688/213 304/304L/304H(1.4301/1.4306/1.4948); 316/316L(1.4401/1.4404);316Ti(1.4571); 321(1.4541);309S(1.4833);310S(1.4845); 317L(1.4438);321H(1.4878);347H(1.4550); 2205(1.4462) ; S31803,2507  Low Pressure Feed Water Heater of Thermal Power Station
Seamless Carbon Steel High Pressure Feed Water Heater(FWH) U-bent Tubes 15.88-25.4 (5/8”-1”) 1.24-3.05 (0.049”-0.12”) Leg Length     12.5m (41’)                      27m(max.dev.Length 88’) ASTM/ASME A/SA556 Gr. B2, C2  High Pressure Feed Water Heater of Thermal Power Station
ASTM A688 Standard for U bend Stainless Steel Tubes
EN 10216-5;DIN 17456;DIN 17458
 GB/T14975;T14976;T13296;GB5310;
ASTM A213;A269;A312;A511;A789;A790;
JIS G3459;G3463;GOST 9940;GOST 9941;
 'U' bending is done by cold working process. 
 'U' bending is done to the required radius as per customer drawings. 
 The bend portion and six inch leg is stress relieved by resistance heating.
 Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.
  
 The radius is checked for its OD and wall thinning with the recommended specification.  The physical properties and microstructure is checked at three different position. 
Visual inspection for waviness and cracks is done with Dye Penetrant Test.
Each tube is then hydro tested at the recommended pressure to check for leakage.
Cotton ball test is done to check the ID cleanliness of the tube.  Thereafter pickled, dried, marked and packed.
All procedure is strictly followed as per TEMA "C" and ASTM A-688.
 
'U'-Bent Steel Tubes are manufactured in our plant as per the customer requirements. Bends can be Heat Treated in accordance with Clients' requirements followed by hydrostatic testing and dye penetrant testing if required.
 U-bent stainless steel 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.
 Tube-bending line, that installed at the end of 2007, will allow to produce U-tubes as per such standards:
 1. ASTM A688/A688M-08
 2. ASTM A803/A803M
 3. ASTM A556/A556M, ASME SA-556
 4. ASME SA-688
Initial Length
 Maximum lengths of 27000mm can be supplied on request
 Bending radius: Maximum 1000 mm
Heat treatment of the bend
 U-bends with a bending radius up to maximum of 1000mm can be heat treated on request
 The basic Testing and processing:
 1. High Pressure Hydrostatic Test:Minimum:10 Mpa-25Mpa.
 2. Air Under Water Test After Bending
 3. U Tubes Wall Thickness Test
 4. Eddy Current Test before U bend Formed
 5. Ultrasonic Test before U bend Formed
 6. Heat treatment to stress relieved
 7. Ball passing test 
Specifications︰
Carbon & Alloy steel U tubes:

Size Range:OD 5/8"~1 1/2" , WT 1.65mm~2.77mm Min Radio: 29mm ; Max Radio:675.84mm

Type of End-Finish:PE

Stainless steel U tubes:

Size Range:OD 5/8"~1 1/2" , WT 1.65mm~2.77mm Min Radio: 29mm ; Max Radio:675.84mm

Type of End-Finish:PE

Tchnical conditions:

Heat treatment:Stress relive annealing of U-tubes after bending

Surface condition Finished U-tubes shall be free of scale, without scratches after bending

Dimensional tolerances U-tubes acc. to TEMA R.C.B.

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 RCB 2.31

Minimum tube wall thickness in the bend part (T min)

T(min) ≥ (SW × (2×R + D))/( 2× (R+D)

where: SW is smallest wall thickness

D Nominal outside diameter

R radius

Radius tolerance 1) for R 100 mm +/- 3 mm

2) for R ≥ 100 mm +/- 5 mm

Straightness tolerance max. 1,5 mm per 1 m

U-Tube ends: plain, vertically cut to the tube axis

Repairs by welding: prohibited

Surface condition Finished U-tubes shall be free of scale, without scratches after bending,

Mandatory tests for U-tubes

100 % Dimensional and visual control.

100 % Ball passed test

100 % Hydrostatic test min 10Mpa/ min 10sec.

Coating :Passivation and oiled, Black paint or varnish

Packing:Plastic plugs in both ends, bundles of max. 3,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper packed in wooden case

Mill Test Certificate:EN 10204/3.1B

Addition:Clean steel grade covered with NACE MR-0175,

USAGE: Heat Exchanger; Steam Boiler;Hot-Water Boiler; Medium temperature Boiler serve ; oil and gas transportation,low-temperature serve; Shipbuilding ect.
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