S.S SEAMLESS & WELDED u-bEND Tubes
Latest type of "U" bending machine is used for precision cold bending of Seamless & Welded tubes. Specifically prepared jigs and fixtures are used to ensure three dimensional accuracy for “U” bend tubes. Bending is done for all kind heat exchanges, condenser and boiler applications.
Paras Bhavani Steel Pvt Ltd can make “U” bent up to R=1 dia. ( Subject to size)
Subsequent to “U” bending tubes are hydro tested and stress relieved if asked for. Also mock-up pieces are prepared for determining thickness reduction on the bend portion is done to detect cracks, flaws or any type of defects. Special packing is provided to prevent any damage during transit.
Specification
Grade
Size Range
Manufacturing Process
Application
Specifications
| STANDARD | SPICIFICATION | APPLICABLE TO |
| ASTM / ASME | A / SA 213 | For Seamless Tubes mainly applicable to Heat Exchangers, Super Heater & Steel Boilers |
|---|---|---|
| A / SA 249 | For Welded Tubes mainly applicable to Heat Exchangers, Boilers, Condenser, Super Heater, etc. | |
| A / SA 268 | For Seamless & Welded Tubes for General Services | |
| A / SA 269 | For Seamless & Welded Tubes for General Services | |
| A / SA 312 | For Seamless & Welded Pipes | |
| A / SA 358 | For Welded Pipes | |
| A / SA 688 | For Welded Water Heater & Heat Exchangers U-Tubes | |
| A / SA 789 | For Seamless & Welded Duplex Stainless Steel Tubes, Pipes & U-Tubes. | |
| GERMAN (EN) | DIN 17456 | For Seamless Tubes For General Services. |
| DIN 17457 | For Welded Tubes For Specific OR Special Requirements. | |
| DIN 10216-5 | For Seamless Tubes For Specific OR Special Requirements. | |
| DIN 10217-5 | For Welded Tubes For Specific OR Special Requirements. | |
| NF | NF A 49-117 | For Seamless Ferritic & Austenitic Stainless Steel Tubes for General Services. |
| NF A 49-217 | For Seamless Ferritic, Austenitic Stainless Steel Tubes For Heat Exchangers. | |
| JIS | JIS G 3459 | For Stainless Steel Pipes. |
| JIS G 3463 | For Stainless Steel Boiler & Heat Exchanger Tubes. |
Material Grades
| MATERIAL | UNS GRADE | ASTM / ASME GRADE (TP) | EQUIVALENT GRADE ( DIN / EN ) |
| AUSTENITIC | S 30400 | 304 | 1.4301 |
|---|---|---|---|
| S 30403 | 304 L | 1.4306 / 1.4307 | |
| S 30409 | 304 H | 1.4948 | |
| S 30400 / S 30403 | 304 / 304 L | 1.4301 / 1.4306 | |
| S 31600 | 316 | 1.4401 | |
| S 31603 | 316 L | 1.4404 | |
| S 31609 | 316 H | 1.4919 | |
| S 31600 / S 31609 | 316 / 316 L | 1.4401 / 1.4404 | |
| S 31635 | 316 Ti | 1.4571 | |
| S 32100 | 321 | 1.4541 | |
| S 32109 | 321 H | 1.4941 | |
| S 32100 / S 32109 | 321 / 321 H | 1.4541 / 1.4941 | |
| FERRATIC/MARTENSITIC | S 40500 | 405 | 1.4002 |
| S 41000 | 410 | 1.4006 | |
| S 43000 | 430 | 1.4016 | |
| DUPLEX & Super Duplex | S 31803 | 2205 | 1.4462 |
| S 32750 | 2507 | 1.4410 |
SIZE RANGE
| PRODUCT | Size Range | ||
|---|---|---|---|
| OD (mm) | Thickness (mm) | Length (Meters) | |
| S.S. Seamless U-Tubes | 12.70 mm - 50.80 mm | 0.90 mm - 3.50 mm | Up to 30 Mtr. (Dev.Length) |
| S.S. Welded U-Tubes | 12.70 mm - 50.80 mm | 0.70 mm - 4.00 mm | Up to 30 Mtr. (Dev.Length) |
Manufacturing Process
APPLICATION OF PRODUCT
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