More information facilitates better communication.
We will call you back soon!
Leave a Message
We will call you back soon!
Your message must be between 20-3,000 characters!
Please check your E-mail!
Please leave your correct email and detailed requirements.
TOBO ALLOY GROUP
TOBO Alloy Group is a mature, steady and energetic high-tech company, specializing in manufacture of high-temperature alloys and corrosion resistant alloys, such as Hastelloy, Haynes, Monel, Inconel, Incoloy and nickel.
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.
Seamless Ferritic and Austenitic Stainless Steel U-bent Tubes
TP304, TP304L, TP316, TP316L……
Welded Stainless Steel U-bent Tubes
UNS S31803/32205, UNS S32750……
Duplex Stainless Steel U-bent Tubes
Monel400, UNS N06600, 625, Incoloy800/800H, 825……
Seamless Nickel Alloy U-bent Tubes
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
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
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
Maximum: 1500 mm
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
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.