Beveled Ends Galvanized Steel Pipe , Thermal Power Plant Flexible Stainless Steel Tubing
Seamless and (Welded) Re-drawn Stainless Steel U Fin Tube Feed Water Heater ASTM/ASME A/SA803 TP439
U Bend Tube are manufactured in our plant as per the customer requirements. Solution annealing after bend will be process to lower the risidual stress, and followed by hydrostatic testing and dye penetrant testing if required.
| Inches | Decimal | Millimeters |
| 1/16″ | .0625 | 1.59 mm |
| 1/8″ | .1250 | 3.18 mm |
| 3/16″ | .1875 | 4.76 mm |
| 1/4″ | .2500 | 6.35 mm |
| 5/16″ | .3125 | 7.94 mm |
| 3/8″ | .3750 | 9.53 mm |
| 7/16″ | .4375 | 11.11 mm |
| 1/2″ | .5000 | 12.70 mm |
| 9/16″ | .5625 | 14.29 mm |
| 5/8″ | .6250 | 15.88 mm |
| 11/16″ | .6875 | 17.46 mm |
| 3/4″ | .7500 | 19.05 mm |
| 13/16″ | .8125 | 20.64 mm |
| 7/8″ | .8750 | 22.23 mm |
| 15/16″ | .9375 | 23.81 mm |
| 1″ | 1.00 | 25.40 mm |
| 1 1/4″ | 1.25 | 31.75 mm |
| 1 1/2″ | 1.50 | 38.10 mm |
| 2″ | 2.00 | 50.80 mm |
| Priducts | Dimensions | Standards | Materials | Remarks | ||
| O.D | W.T | Length | ||||
| U-bent Tubes for Heat Exchanger | 12.7-76.2mm (1/2"-3") |
0.5-5.16mm (0.02"-0.203") |
Leg Length: 15.24m(50') Total Length: 32.00m(105)' |
ASTM/ASME A/SA213 | T5, T11,T12, T22, T9, 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 | UNS S31803/32205, UNS S32750…… | Duplex Stainless Steel U-bent Tubes | ||||
| ASTM/ASME A/SA163 | Monel400, UNS N06600, 625, Incoloy800/800H, 825…… | Seamless Nickel Alloy U-bent Tubes | ||||
| ASTM/ASME A/SA268 | TP405, TP409, TP410, TP430, TP439…… | Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes | ||||
| Seamless and (Welded) Re-drawn Stainless Steel Feed Water Heater U-bent Tubes | 12.7-25.4mm (1/2"-1") |
0.7-3.05mm (0.028"-0.12") |
Leg Length: 15.24m(50') Total Length: 32.00m(105)' |
ASTM/ASME A/SA668/213 ASTM/ASME A/SA803 | TP304, TP304L, TP304LN TP316, TP316L, TP439 | Low Pressure Feed Water Heater of Thermal Power Station |
Dimensional tolerances U Bend Tube acc. to TEMA R.C.B.
1) U Bend Pipe 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) U Bend Tube 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
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 Tube Initial Length
Maximum lengths of 27000mm can be supplied on request
U bend Pipe Bending radius
Minimum: 1.5×OD
Maximum: 1500 mm
TEST CERTIFICATE
Mill Test Certificate as per EN 10204 / 3.1
Advanced capabilities for U-bent tubes:
- Reliable bending machines
- Precision bending dies
- Eddy current test before bending
- Bending up to 105’(32m) developed length
- Electric resistance stress relief annealing after bending
- Hydrostatic test after bending
- OD and WT reduction Testing
- Full bending radius and tube legs tolerance check
- Stack-rack boxing
Stainless Steel ubend :
ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L, 316TI, 316H, 304L
Carbon Steel ubend
ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Low Temperature Carbon Steel
ASTM A420 WPL3 / A420WPL6
Alloy Steel ubend
ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
Duplex Steel ubend
ASTM A 815 UNS NO S 31803, S 32205, S 32760, S 32750
Copper Nickel
C70600(90:10), C71500(70:30), C71640.
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