What is Bend Radius and Angle for Steel Pipe Bending?
Usually R≥3D , such as R= 3D, 4D, 5D, 6D, 7D, 8D, 9D, 10D
Normally 15°, 30°, 45°, 60°, 90°, 135°, 180° or at customer’s option.
Stainless steel pipe bends are available in 90 degree and 45 degree, while 3D and 5D bend pipe fittings are very common used in the industries.
Material Grades for Steel Pipe Bends
Carbon Steel 90 Degree Bends
ASTM A234 WPB, A106B, A860 WPHY42, 52, 60, 65, 70, A420 WPL 3 / 6 / 9
Alloy Steel 45 Degree Bends
ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91
Stainless Steel Pipe Bends
ASTM A403 WP304/304L/304H, WP316/316L, WP310, WP317, WP321, WP309, WP347
Duplex Steel 180 Degree Bends
ASTM A815 UNS S 31803, 32205, 32550, 32750, 32760
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‐09 | X5CrNi18-10 |
| SS 304L/304H | 1.4306 / 1.4307/1.4301 | S30403/S30409 | SUS 304L | 3304S11 | 03Х18Н11 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 |
| SS 310 | 1.4841 | S31000 | SUS 310 | 310S24 | 20Ch25N20S2 | – | X15CrNi25-20 |
| SS 310S/310H | 1.4845 | S31008/S31009 | SUS 310S | 310S16 | 20Ch23N18 | – | X8CrNi25-21 |
| SS 316 | 1.4401 / 1.4436 | S31600 | SUS 316 | 316S31 / 316S33 | – | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| SS 316H | 1.4401 | S31609 | |||||
| SS 316Ti | 1.4571 | S31635 | SUS 316Ti | 320S31 | 08Ch17N13M2T | Z6CNDT17‐123 | X6CrNiMoTi17-12-2 |
| SS 317 | 1.4449 | S31700 | SUS 317 | – | – | – | – |
| SS 317L | 1.4438 | S31703 | SUS 317L | – | – | – | – |
| SS 321 | 1.4541 | S32100 | SUS 321 | – | – | – | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | – | – | – | X12CrNiTi18-9 |
| SS 347 | 1.4550 | S34700 | SUS 347 | – | 08Ch18N12B | – | X6CrNiNb18-10 |
| SS 347H | 1.4961 | S34709 | SUS 347H | – | – | – | X6CrNiNb18-12 |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 / KS STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
Size : Seamless Pipe Bends (1/2″ – 24″), ERW / Welded / Fabricated Pipe Bends (2″ – 36″)
Outer Diameter : 38.0 mm – 206.0 mm
Wall Thickness : 1.5 mm / 2.0 mm / 3.0 mm – greater wall thickness at request
Specifications : ASTM A403 & ASME SA403
Dimensions : ASME/ANSI B16.9 / B16.28 and MSS SP-43 / SP-75
Bend Radii : 75 / 100 / 150 / 250 / 300 / 500 / 800 / 1,000 / 1,200 / 1,500 mm
Bending Radius(R): R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Bending angle (θ): 15°, 30°, 45°, 60°, 90°, 135°, 180°
| ASTM A403 | ASME SA403 – Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| ASME B16.9 | Factory-Made Wrought Fittings Buttwelding |
| ASME B16.25 | Buttwelding Ends ASME B16.28 – Wrought Steel Short Radius Elbows and Buttwelding Returns |
| MSS SP-43 | Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications |
| ASME Pipe Bend | ANSI B16.9, ANSI B16.28, MSS-SP-43 |
| DIN Pipe Bend | DIN2605, DIN2615, DIN2616, DIN2617, DIN28011 |
| EN Pipe Bend | EN10253-1, EN10253-2 |
Hebei Shengtian Pipefitting Group Co.,Ltd is leading manufacturer, supplier and exporter of ASTM A403 WP304 Stainless Steel Pipe Bends which contain 8% Nickel and 18% Chromium, and are the most commonly used pipe bend grade.Our speciality are stainless Steel 304L thin-walled pipe-bends with large bending radius, especially for pneumatic conveying systems. ASME SA403 WP416L pipe-bends are cold-bent without any pleats on CNC-mandrel machines.Being strong , UNS S31600 SS 3D Pipe Bends have a bend curve at room temperature and temperature low and moderately high which has a radius equal to 3x of the diameter of the pipe, these stainless steel pipe bends are low cost compared to other pipe bends.
316Ti stainless Pipe Bends are resistant to atmospheric corrosion in refrigeration and pulp extraction industry. Our WNR 1.4301 SS Hot Induction Bends are very important pipe fitting which are used very frequently for changing direction in piping system.
We are largest stockist of ASTM A403 WP 304 5D Stainless Pipe Bends such as SS 304 Long Radius Bend, SS 316 Piggable Bend, SS 316L Hot Induction Bend, SS 321 Seamless Pipe Bend, SS 321H Welded Pipe Bend, SS 347 U Pipe Bend, SS 304L J Pipe Bend, ASME SA403 304 Mitered Pipe Bend, SS 304 3D Pipe Bend etc.
