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ASME B16.28 ASTM A403 Wrought Stainless Steel Buttwelding Short Radius Elbows and Returns
Product Information
| Product Name | ASME B16.28 ASTM A403 Wrought Stainless Steel Buttwelding Short Radius Elbows and Returns |
| Size Range | 1” to 24” |
| Manufacturing Standards | ASME B16.28 |
| Fitting Type | Short Radius 90° Elbow, Short Radius 180° Return |
| Materials | ASTM A403 |
| Finish | Galvanized, Black (Carbon), Pickled |
ASME B16.28 is a standard that provides the requirements for the fabrication and installation of butt-welded short radius elbows and returns. These fittings are commonly used in piping systems to change the direction of flow and are typically manufactured from carbon steel, stainless steel, or other alloy materials.
Materials: ASTM A403
ASTM A403 Stainless Steel Pipe Fittings refers to the material of forged and rolled austenitic stainless fittings for pressure pipes. Common grades are WP304/L, WP316/L. They can be used into many fields as engineering industry, energy conversion plants etc.
Chemical composition (%)
| Grade | C, max | Mn | P, max | S, max | Si, max | Cr | Mo | Ni | Others |
| WP304 | 0.08 | 2.00 | 0.040 | 0.030 | 0.75 | 18.0-20.0 | — | 8.0-11.0 | — |
| WP304L | 0.035 | 2.00 | 0.040 | 0.030 | 0.75 | 18.0-20.0 | — | 8.0-13.0 | — |
| WP304H | 0.04-0.10 | 2.00 | 0.040 | 0.030 | 0.75 | 18.0-20.0 | — | 8.0-11.0 | |
| WP321 | 0.08 | 2.00 | 0.040 | 0.030 | 0.75 | 17.0-20.0 | — | 9.0-13.0 | Ti=5×C, max 0.70 |
| WP321H | 0.04-0.10 | 2.00 | 0.040 | 0.030 | 0.75 | 17.0-20.0 | — | 9.0-13.0 | Ti=4×C, max 0.60 |
| WP316 | 0.08 | 2.00 | 0.040 | 0.030 | 0.75 | 16.0-18.0 | 2.00-3.00 | 11.0-14.0 | — |
| WP316L | 0.035 | 2.00 | 0.040 | 0.030 | 0.75 | 16.0-18.0 | 2.00-3.00 | 10.0-15.0 | — |
| WP316H | 0.04-0.10 | 2.00 | 0.040 | 0.030 | 0.75 | 16.0-18.0 | 2.00-3.00 | 11.0-14.0 | — |
Mechanical Properties
| Grade | Tensile Strength, min. (MPa) | Yield Strength, min (MPa) | Elongation (2”/4D), min (%) | |
| Long. | Trasv. | |||
| WP304 | 515 | 205 | 35 | 25 |
| WP304L | 485 | 170 | 35 | 25 |
| WP304H | 515 | 205 | 35 | 25 |
| WP321 | 515 | 205 | 35 | 25 |
| WP321H | 515 | 205 | 35 | 25 |
| WP316 | 515 | 205 | 35 | 25 |
| WP316L | 485 | 170 | 35 | 25 |
| WP316H | 515 | 205 | 35 | 25 |
Dimensions of ASME B16.28 Short Radius Elbow (mm)
| NPS | Outside Diameter at Bevel D | Center-to-End A | ||||
| 90° Elbows | ||||||
| Min. | Nom. | Max | Min. | Nom. | Max | |
| 1″ | 32 | 33 | 34 | 23 | 25 | 27 |
| 1¼″ | 41 | 42 | 43 | 30 | 32 | 34 |
| 1½″ | 47 | 48 | 49 | 36 | 38 | 40 |
| 2" | 59 | 60 | 61 | 49 | 51 | 53 |
| 2½″ | 72 | 73 | 74 | 62 | 64 | 66 |
| 3″ | 88 | 89 | 90 | 74 | 76 | 78 |
| 3½″ | 101 | 102 | 103 | 87 | 89 | 91 |
| 4″ | 113 | 114 | 116 | 100 | 102 | 104 |
| 5″ | 140 | 141 | 144 | 125 | 127 | 129 |
| 6″ | 167 | 168 | 171 | 150 | 152 | 154 |
| 8″ | 217 | 219 | 221 | 201 | 203 | 205 |
| 10″ | 270 | 273 | 277 | 252 | 254 | 256 |
| 12″ | 321 | 324 | 328 | 302 | 305 | 308 |
| 14″ | 353 | 356 | 360 | 353 | 356 | 359 |
| 16″ | 403 | 406 | 410 | 403 | 406 | 409 |
| 18″ | 454 | 457 | 461 | 454 | 457 | 460 |
| 20″ | 503 | 508 | 514 | 505 | 508 | 511 |
| 22″ | 554 | 559 | 565 | 556 | 559 | 562 |
| 24″ | 605 | 610 | 616 | 607 | 610 | 613 |
General Note: Dimensions are in millimeters.
Dimensions of ASME B16.28 Short Radius 180° Returns (mm)
| NPS | Outside Diameter at Bevel D | Center-to-Center O | Back-to-Face K | ||||||
| Min. | Nom. | Max. | Min. | Nom. | Max. | Min. | Nom. | Max. | |
| 1″ | 32 | 33 | 34 | 44 | 51 | 58 | 34 | 41 | 48 |
| 1¼″ | 41 | 42 | 43 | 57 | 64 | 71 | 45 | 52 | 59 |
| 1½″ | 47 | 48 | 49 | 69 | 76 | 83 | 55 | 62 | 69 |
| 2" | 59 | 60 | 61 | 95 | 102 | 109 | 74 | 81 | 88 |
| 2½″ | 72 | 73 | 74 | 120 | 127 | 134 | 93 | 100 | 107 |
| 3″ | 88 | 89 | 90 | 145 | 152 | 159 | 114 | 121 | 128 |
| 3½″ | 101 | 102 | 103 | 171 | 178 | 185 | 133 | 140 | 147 |
| 4″ | 113 | 114 | 116 | 196 | 203 | 210 | 152 | 159 | 166 |
| 5″ | 140 | 141 | 144 | 247 | 254 | 261 | 190 | 197 | 204 |
| 6″ | 167 | 168 | 171 | 298 | 305 | 312 | 230 | 237 | 244 |
| 8″ | 217 | 219 | 221 | 399 | 406 | 413 | 306 | 313 | 320 |
| 10″ | 270 | 273 | 277 | 498 | 508 | 518 | 384 | 391 | 398 |
| 12″ | 321 | 324 | 328 | 600 | 610 | 620 | 460 | 467 | 474 |
| 14″ | 353 | 356 | 360 | 701 | 711 | 721 | 526 | 533 | 540 |
| 16″ | 403 | 406 | 410 | 803 | 813 | 823 | 603 | 610 | 617 |
| 18″ | 454 | 457 | 461 | 904 | 914 | 924 | 679 | 686 | 693 |
| 20″ | 503 | 508 | 514 | 1006 | 1016 | 1026 | 755 | 762 | 769 |
| 22″ | 554 | 559 | 565 | 1108 | 1118 | 1128 | 831 | 838 | 845 |
| 24″ | 605 | 610 | 616 | 1209 | 1219 | 1229 | 907 | 914 | 921 |
General Note: Dimensions are in millimeters