SS304 SS321 SS316 Stainless Steel Pipe Fittings Concentric Reducer
with Seamless and welded type
Brief Introduction
A buttweld fitting is a weldable pipe fitting that allows for change of direction of
flow, to branch off, reduce pipe size or attach auxiliary equipment. Forged Steel buttweld fittings are manufactured in accordance
with ANSI / ASME B16.9. Butt weld fittings are available as elbows, tees, caps, reducers
and out lets (olets). Buttweld fittings use seamless or welded pipe
as the starting material and are formed (through multiple
processes) to get the shape of elbows, tees and reducers etc. Just
as the pipe is sold from Schedule 10 to Schedule 160, butt weld
pipe fittings are sold the same way. Welded butt weld fittings are
more common in stainless steel due to cost advantage. Sch 10
fittings are also more common in stainless steel butt weld
fittings.
Products Information/Specification:
| Products Name | Butt-Welding Stainless steel seamless and welded Pipe Fitting with
standard ANSI B16.9 |
| Types | Con. Reducers, Ecc. redcuers, LR Elbows, SR Elbow, 180deg Returns,
Bends, Reducing Eblow, Straight Tee, Equal Tee, Y Tee, caps, Stub Ends, |
| Size | 1/2"-72" DN15-DN1800 |
| Wall Thickness | From low thickness to higher thickness
SCH5S,SCH10s,SCH20S,SCH30,STD,SCH40S,SCH60,XS,SCH80S,SCH100,SCH120, SCH160S,XXS, DIN, SGP JIS thickness |
| Standard | ASTMA312, ASTM AWP40, ASME, A234WPB A420, ANSI B16.9/B16.28/B16.25 |
| JIS B2311-1997/2312, JIS B2311/B2312, DIN 2605-1/2617/2615, |
| GB 12459-99,EN Standard etc. |
| Material | Stainless Steel304, 304L, 304H, 316, 316L, 316H, 310, SS321,
SS321H, 347, 347H, 904L |
| Duplex SS 2507, DSS2205, UNS31803 UNS32750 |
| 1.4301,1.4306, 1.4401, 1.4435, 1.4406, 1.4404, 1.4462, 1.4410,
1.4501 |
| |
| Carbon Steel A234 WPB, WP5, WP9,WP11, WP22, A420WPL6, A420WPL8 |
| ST37.0,ST35.8,ST37.2,ST35.4/8,ST42,ST45,ST52,ST52.4 |
| |
| STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49 |
| |
| Surface | Sandblast , acid pickling, Polished |
Features /Characteristics
• Buttweld fittings are available in multiple shapes (elbows, tees,
reducers, crosses, caps, stub ends), material grades (carbon,
high-yield carbon, low-alloy, stainless, duplex, and nickel
alloys)and dimensions (2 to 24 inches in seamless or welded,
26"-72" in welded ).
• Buttweld fittings are pipe fittings used to change the pathway of
a pipeline (elbows), reduce/increase the pipe bore size (reducers),
branch (tees, cross) or blind a pipeline (butt weld cap)
• The key specifications for buttweld fittings are the ASME B16.9
(carbon and alloy fittings) and the MSS SP 43 (that integrates ASME
B16.9 for stainless steel, duplex, and nickel alloy BW fittings).
• butt weld pipe fittings are sold as SCH105S, SCH10S, SCH20S,
SCH40S, STD, SCH40, SCH80S, SCH80, SCH160S, XXS
• Welded butt weld fittings are more common in stainless steel due
to cost advantage. Sch 10S, SCH40S SS fittings are also more common
in stainless steel butt weld fittings.
• Common material for butt weld fittings are A234 WPB, High Yield
Carbon Steel, Stainless Steel 304 and 316 and Nickel Alloys.
• Welded pipe fittings in carbon steel and stainless steel are the
joining components that make possible the assembly of valves, pipes
and equipment onto the piping system.
Technology/ Technical Data Sheets
Thickness List for pipefittings ANSI B16.9
Unit: mm
| Pipe Size DN (in) | Outside Dimeter D | Norminal Wall Thickness |
| Sch5s | Sch10S | Sch20 | Sch30 | Sch40s | STD | Sch40 | Sch60 | Sch80s | XS | Sch80 | Sch100 | Schl20 | Schl40 | Sch160 | XXS |
| 1/8 | 10. 3 | —— | 1. 24 | —— | —— | 1. 73 | 1. 73 | 1. 73 | —— | 2. 41 | 2. 41 | 2. 41 | —— | —— | —— | —— | —— |
| 1/4 | 13. 7 | — | 1. 65 | — | — | 2. 24 | 2. 24 | 2. 24 | — | 3. 02 | 3. 02 | 3. 02 | — | — | — | — | — |
| 3/8 | 17. 1 | — | 1. 65 | — | — | 2. 31 | 2. 31 | 2. 31 | — | 3. 20 | 3. 20 | 3. 20 | — | — | — | — | — |
| 1/2 | 21. 3 | 1.65 | 2. 11 | —— | —— | 2. 77 | 2. 77 | 2. 77 | —— | 3. 73 | 3. 73 | 3. 73 | —— | —— | —— | 4. 78 | 7. 47 |
| 3/4 | 26. 7 | 1.65 | 2. 11 | —— | —— | 2. 87 | 2. 87 | 2. 87 | —— | 3. 91 | 3. 91 | 3. 91 | —— | —— | —— | 5. 56 | 7. 82 |
| 1 | 33.4 | 1. 65 | 2. 77 | — | — | 3. 38 | 3. 38 | 3. 38 | — | 4. 55 | 4. 55 | 4. 55 | — | — | — | 6. 35 | 9. 09 |
| 1 1/4 | 42. 2 | 1.65 | 2. 77 | — | — | 3. 56 | 3. 56 | 3. 56 | — | 4. 85 | 4. 85 | 4. 85 | — | — | — | 6. 35 | 9. 70 |
| 1 1/2 | 48. 3 | 1.65 | 2. 77 | —— | —— | 3. 68 | 3. 68 | 3. 68 | —— | 5. 08 | 5. 08 | 5. 08 | —— | —— | —— | 7. 14 | 10. 15 |
| 2 | 60. 3 | 1. 65 | 2. 77 | —— | —— | 3. 91 | 3. 91 | 3. 91 | —— | 5. 54 | 5. 54 | 5. 54 | —— | —— | —— | 8. 74 | 11. 07 |
| 2 1/2 | 73. 0 | 2. 11 | 3. 05 | — | — | 5. 16 | 5. 16 | 5. 16 | — | 7. 01 | 7. 01 | 7.01 | — | — | — | 9. 53 | 14. 02 |
| 3 | 88. 9 | 2. 11 | 3. 05 | — | — | 5. 49 | 5. 49 | 5. 49 | — | 7. 62 | 7. 62 | 7. 62 | — | — | — | 11. 13 | 15. 24 |
| 3 1/2 | 101. 6 | 2. 11 | 3. 05 | —— | —— | 5. 74 | 5. 74 | 5. 74 | —— | 8. 08 | 8. 08 | 8. 08 | —— | —— | —— | —— | —— |
| 4 | 114. 3 | 2. 11 | 3. 05 | —— | —— | 6. 02 | 6.02 | 6. 02 | —— | 8. 56 | 8. 56 | 8. 56 | —— | 11. 13 | —— | 13. 49 | 17. 12 |
| 5 | 141. 3 | 2. 77 | 3. 40 | — | — | 6. 55 | 6. 55 | 6. 55 | — | 9. 53 | 9. 53 | 9. 53 | — | 12. 70 | — | 15. 88 | 19. 05 |
| 6 | 168. 3 | 2. 77 | 3. 40 | — | — | 7. 11 | 7. 11 | 7. 11 | — | 10. 97 | 10. 97 | 10. 97 | — | 14. 27 | — | 18. 26 | 21.95 |
| 8 | 219. 1 | 2. 77 | 3. 76 | 6. 35 | 7. 04 | 8. 18 | 8. 18 | 8. 18 | 10. 31 | 12. 70 | 12. 70 | 12. 70 | 15. 09 | 18. 26 | 20. 62 | 23. 01 | 22.23 |
| 10 | 273. 1 | 3. 40 | 4. 19 | 6. 35 | 7. 80 | 9. 27 | 9. 27 | 9.27 | 12. 70 | 12. 70 | 12. 70 | 15. 09 | 18. 26 | 21. 44 | 25. 40 | 28. 58 | 25. 40 |
| 12 | 323.9 | 3. 96 | 4. 57 | 6. 35 | 8. 38 | 9. 53 | 9. 53 | 10. 31 | 14. 27 | 12. 70 | 12. 70 | 17. 48 | 21. 44 | 25. 40 | 28. 58 | 33. 32 | 25. 40 |
| 14 | 355. 6 | 3. 96 | 4. 78 | 7. 92 | 9. 53 | — | 9. 53 | 11. 13 | 15. 09 | — | 12. 70 | 19. 05 | 23. 83 | 27. 79 | 31. 75 | 35. 71 | — |
| 16 | 406. 4 | 4. 19 | 4. 78 | 7. 92 | 9. 53 | —— | 9. 53 | 12. 70 | 16. 66 | —— | 12. 70 | 21. 44 | 26. 19 | 30. 96 | 36. 53 | 40. 49 | —— |
| 18 | 457. 2 | 4. 19 | 4. 78 | 7. 92 | 11. 13 | —— | 9. 53 | 14. 27 | 19. 05 | —— | 12. 70 | 23. 83 | 29. 36 | 34. 96 | 39. 67 | 45. 24 | —— |
| 20 | 508. 0 | 4. 78 | 5. 54 | 9. 53 | 12. 70 | — | 9. 53 | 15. 09 | 20. 62 | — | 12. 70 | 26. 19 | 32. 54 | 38. 10 | 44. 45 | 50. 01 | — |
| 22 | 558. 8 | 4. 78 | 5. 54 | 9. 53 | 12. 70 | — | 9. 53 | — | 22. 23 | — | 12. 70 | 28. 58 | 34. 93 | 41. 28 | 47. 63 | 53. 98 | — |
| 24 | 609. 6 | 5. 54 | 6. 35 | 9. 53 | 14. 27 | —— | 9. 53 | 17. 48 | 24. 61 | —— | 12. 70 | 30. 96 | 38. 89 | 46. 02 | 52. 37 | 59. 54 | —— |
| 26 | 660.4 | —— | —— | 12. 70 | —— | —— | 9. 53 | —— | —— | —— | 12. 70 | —— | —— | —— | —— | —— | —— |
| 28 | 711.2 | — | — | 12. 70 | 15. 88 | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
| 30 | 762. 0 | 6. 35 | 7. 92 | 12. 70 | 15. 88 | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
| 32 | 812. 8 | —— | —— | 12. 70 | 15. 88 | —— | 9. 53 | 17. 48 | —— | —— | 12. 70 | —— | —— | —— | —— | —— | —— |
| 34 | 863. 6 | —— | —— | 12. 70 | 15. 88 | —— | 9. 53 | 17. 48 | —— | —— | 12. 70 | —— | —— | —— | —— | —— | —— |
| 36 | 914. 4 | — | — | 12. 70 | 15. 88 | — | 9. 53 | 17. 48 | — | — | 12. 70 | — | — | — | — | — | — |
| 38 | 965.2 | — | — | — | — | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
| 40 | 1016. 0 | —— | —— | —— | —— | —— | 9. 53 | —— | —— | —— | 12. 70 | —— | —— | —— | —— | —— | —— |
| 42 | 1066. 8 | —— | —— | —— | —— | —— | 9. 53 | —— | —— | —— | 12. 70 | —— | —— | —— | —— | —— | —— |
| 44 | 1117. 6 | — | — | — | — | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
| 46 | 1168.4 | — | — | — | — | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
| 48 | 1219. 2 | — | — | — | — | — | 9. 53 | — | — | — | 12. 70 | — | — | — | — | — | — |
Dimensions of Reducers
| Nominal Pipe Size (NPS) | Outside Diameter at Bevel | End-to-End, H | Size | Outside Diameter at Bevel | End-to-End, |
| Large End | Small End | (NPS) | Large End | Small End | H |
| 3/4 x 1/2 | 26.7 | 21.3 | 38 | 5X4 | 141.3 | 114.3 | 127 |
| 3/4 x 3/8 | 26.7 | 17.3 | 38 | 5 x 3’/2 | 141.3 | 101.6 | 127 |
| 1 X 3/4 | 33.4 | 26.7 | 51 | 5X3 | 141.3 | 88.9 | 127 |
| 1 x 1/2 | 33.4 | 21.3 | 51 | 5 x 2’/2 | 141.3 | 73.0 | 127 |
| 1-1/4 X 1 | 42.2 | 33.4 | 51 | 5X2 | 141.3 | 60.3 | 127 |
| 1-1/4 X 3/4 | 42.2 | 26.7 | 51 | 6X5 | 168.3 | 141.3 | 140 |
| 1-1/4 x 1/2 | 42.2 | 21.3 | 51 | 6X4 | 168.3 | 114.3 | 140 |
| 1-1/2 x 1-1/4 | 48.3 | 42.2 | 64 | 6 x 31/, | 168.3 | 101.6 | 140 |
| 1-1/2 X 1 | 48.3 | 33.4 | 64 | 6x3 | 168.3 | 88.9 | 140 |
| 1-1/2X3/4 | 48.3 | 26.7 | 64 | 6 x 27 | 168.3 | 73.0 | 140 |
| 1-1/2X1/2 | 48.3 | 21.3 | 64 | 8x6 | 219.1 | 168.3 | 152 |
| 2 X 1-/2 | 60.3 | 48.3 | 76 | 8X5 | 219.1 | 141.3 | 152 |
| 2 X 1-1/4 | 60.3 | 42.2 | 76 | 8X4 | 219.1 | 114.3 | 152 |
| 2X1 | 60.3 | 33.4 | 76 | 8 x 3-1/2 | 219.1 | 101.6 | 152 |
| 2 X 3/4 | 60.3 | 26.7 | 76 | 10 X 8 | 273.0 | 219.1 | 178 |
| 2-1/2 X 2 | 73.0 | 60.3 | 89 | 10 x 6 | 273.0 | 168.3 | 178 |
| 2-1/2 x 1-1/2 | 73.0 | 48.3 | 89 | 10 x 5 | 273.0 | 141.3 | 178 |
| 2-1/2 X 1-1/4 | 73.0 | 42.2 | 89 | 10 x 4 | 273.0 | 114.3 | 178 |
| 2-1/2 X 1 | 73.0 | 33.4 | 89 | 12 x 10 | 323.8 | 273.0 | 203 |
| 3 X 2-1/2 | 88.9 | 73.0 | 89 | 12 x 8 | 323.8 | 219.1 | 203 |
| 3x2 | 88.9 | 60.3 | 89 | 12 x 6 | 323.8 | 168.3 | 203 |
| 3 x 1-1/2 | 88.9 | 48.3 | 89 | 12 x 5 | 323.8 | 141.3 | 203 |
| 3 x 1-1/4 | 88.9 | 42.2 | 89 | 14 x 12 | 355.6 | 323.8 | 330 |
| 3-1/2 x 3 | 101.6 | 88.9 | 102 | 14 X 10 | 355.6 | 273.0 | 330 |
| 3-1/2x 2-1/2 | 101.6 | 73.0 | 102 | 14 X 8 | 355.6 | 219.1 | 330 |
| 3-1/2 X 2 | 101.6 | 60.3 | 102 | 14 x 6 | 355.6 | 168.3 | 330 |
| 3-1/2 x 1-1/2 | 101.6 | 48.3 | 102 | 16 x 14 | 406.4 | 355.6 | 356 |
| 3-1/2x 1-1/4 | 101.6 | 42.2 | 102 | 16 x 12 | 406.4 | 323.8 | 356 |
| 4 x 3-1/2 | 114.3 | 101.6 | 102 | 16 x 10 | 406.4 | 273.0 | 356 |
| 4X3 | 114.3 | 88.9 | 102 | 16 x 8 | 406.4 | 219.1 | 356 |
| 4 X 2-1/2 | 114.3 | 73.0 | 102 | 18 x 16 | 457 | 406.4 | 381 |
| 4X2 | 114.3 | 60.3 | 102 | 18 x 14 | 457 | 355.6 | 381 |
| 4 x1-1/2 | 114.3 | 48.3 | 102 | 18 x 12 | 457 | 323.8 | 381 |
| | | | | 18 x 10 | 457 | 273.0 | 381 |
| Nominal Pipe Size (NPS) | Outside Diameter at Bevel | End-to-End, H | Nominal Pipe Size (NPS) | Outside Diameter at Bevel | End-to-End, H |
| Large End | Small End | Large End | Small End |
| 20 X 18 | 508 | 457.0 | 508 | 36 x 34 | 914 | 864 | 610 |
| 20 X 16 | 508 | 406.4 | 508 | 36 x 32 | 914 | 813 | 610 |
| 20 x 14 | 508 | 355.6 | 508 | 36 x 30 | 914 | 762 | 610 |
| 20 x 12 | 508 | 323.8 | 508 | 36 x 26 | 914 | 660 | 610 |
| | | | | 36 x 24 | 914 | 610 | 610 |
| 22 X 20 | 559 | 508.0 | 508 | | | | |
| 22 X 18 | 559 | 457.0 | 508 | 38 x 36 | 965 | 914 | 610 |
| 22 x 16 | 559 | 406.4 | 508 | 38 x 34 | 965 | 864 | 610 |
| 22 X 14 | 559 | 355.4 | 508 | 38 X 32 | 965 | 813 | 610 |
| | | | | 38 x 30 | 965 | 762 | 610 |
| | | | | 38 X 28 | 965 | 711 | 610 |
| 24 X 22 | 610 | 559.0 | 508 | 38 x 26 | 965 | 660 | 610 |
| 24 X 20 | 610 | 508.0 | 508 | | | | |
| 24 x 18 | 610 | 457.0 | 508 | 40 x 38 | 1 016 | 965 | 610 |
| 24 X 16 | 610 | 406.4 | 508 | 40 x 36 | 1 016 | 914 | 610 |
| | | | | 40 X 34 | 1 016 | 864 | 610 |
| 26 x 24 | 660 | 610.0 | 610 | 40 X 32 | 1 016 | 813 | 610 |
| 26 X 22 | 660 | 559.0 | 610 | 40 x 30 | 1 016 | 762 | 610 |
| 26 X 20 | 660 | 508.0 | 610 | | | | |
| 26 X 18 | 660 | 457.0 | 610 | 42 X 40 | 1 067 | 1 016 | 610 |
| | | | | 42 X 38 | 1 067 | 965 | 610 |
| 28 X 26 | 711 | 660.0 | 610 | 42 x 36 | 1 067 | 914 | 610 |
| 28 X 24 | 711 | 610.0 | 610 | 42 X 34 | 1 067 | 864 | 610 |
| 28 x 20 | 711 | 508.0 | 610 | 42 X 32 | 1 067 | 813 | 610 |
| 28 X 18 | 711 | 457.0 | 610 | 42 X 30 | 1 067 | 762 | 610 |
| 30 X 28 | 762 | 711.0 | 610 | 44 X 42 | 1 118 | 1 067 | 610 |
| 30 X 26 | 762 | 660.0 | 610 | 44 X 40 | 1 118 | 1 016 | 610 |
| 30 X 24 | 762 | 610.0 | 610 | 44 X 38 | 1 118 | 965 | 610 |
| 30 X 20 | 762 | 508.0 | 610 | 44 X 36 | 1 118 | 914 | 610 |
| 32 X 30 | 813 | 762.0 | 610 | 46 X 44 | 1 168 | 1 118 | 711 |
| 32 X 28 | 813 | 711.0 | 610 | 46 X 42 | 1 168 | 1 067 | 711 |
| 32 x 26 | 813 | 660.0 | 610 | 46 x 40 | 1 168 | 1 016 | 711 |
| 32 x 24 | 813 | 610.0 | 610 | 46 x 38 | 1 168 | 965 | 711 |
| 34 x 32 | 864 | 813.0 | 610 | 48 x 46 | 1 219 | 1 168 | 711 |
| 34 X 30 | 864 | 762.0 | 610 | 48 X 44 | 1 219 | 1 118 | 711 |
| 34 x 26 | 864 | 660.0 | 610 | 48 x 42 | 1 219 | 1 067 | 711 |
| 34 x 24 | 864 | 610.0 | 610 | 48 x 40 | 1 219 | 1 016 | 711 |
Stainless steel is the abbreviation for stainless and acid
resistant steel. Steel that is resistant to weak corrosive media
such as air, steam, water, or has rust resistance is called
stainless steel; And the steel grade that is resistant to chemical
corrosion media (such as acid, alkali, salt, etc.) corrosion is
called acid resistant steel.For the Stainless Steel pipefittings,
the most common used material is SS304/304L, SS316/316L, DUPLEX
SAF2507, SAF2205
Production Process
Application/Usage
Low and middle pressure fluid pipeline,boiler, petroleum and
natural gas industry, drilling,chemical industry, electric
industry,shipbuilding,fertilizer equipment and pipeline,
structure,petrochemical,pharmaceutical industry,etc.
FAQ/ Customer Question and Answers
Q:Customer asked for butt weld fittings in A105:
A: Most common carbon steel buttweld fitting material is A234WPB. It
is equivalent to A105 flanges, however there is no such thing as an
A105 or A106 butt weld fitting. A106 Gr.B is for pipe grade. The
A234WPB fittings are made from A106GR.B pipes. A105 is a material
from Bar forged to be High pressure Fittings or Flange
Q: Customer requests “Normalized” butt weld fittings:
A: This is also a misconception since flanges are available in A105
and A105 N, where N stands for normalized.
However, there is no such thing as A234WPBN. Manufactures normalize
their butt weld fittings was considered that normalized heat
treating process was done, Espeically for the elbows and Tees
Customer needing “normalized” butt weld fittings should request
WPL6 fittings which are high yield and are normalized as a standard
procedure.
Q: Customer forgets to mention pipe schedule:
A: Buttweld fittings are sold as per pipe size but pipe schedule must
be specified to match the ID of the fitting to the ID of the pipe.
If no schedule is mentioned, we will assume a standard wall is
requested.
Q: Customer forgets to mention welded or seamless butt weld fitting:
A: Butt weld fittings are available in both welded and seamless
configuration. A seamless butt weld carbon steel or stainless steel
fitting is made of seamless pipe and is generally more expensive.
Seamless pipe fittings are NOT common in sizes bigger than 12”.
Welded pipe fittings are made of ERW welded carbon steel or
stainless steel pipe. They are available in sizes ½” to 72” and are
more affordable than seamless fittings.
Q: What does Short Radius (SR) or Long Radius (LR) means?
A: You will often hear SR45 elbow or LR45 elbow. The 45 or 90 refers
to the angle of the bend for buttweld fitting to change the
direction of flow.
A long radius elbow (LR 90 Elbow or LR 45 elbow) will have a pipe
bend that will be 1.5 times the size of the pipe. So, a 6 inch LR
90 has bending radius that is 1.5 x nominal pipe size.
A short radius elbow (SR45 or SR90) has a pipe bend that is equal
to the size of the fitting, so a 6” SR 45 has a bending radius that
is 6” nominal pipe size.
Q: What is a 3R or 3D elbow pipe fitting?
A: First, the terms 3R or 3D are used synonymously. A 3R butt weld
elbow has a bending radius that is 3 times the nominal pipe size. A
3R elbow is equal to 3D Elbows
Our Service
1. Technical support
2. Raw Material Quality control.
3. Inspection during the production time.
4. Final Test includes Surface, Dimension, PT Test, RT test,
ultrasonic Test
5. Test Report each shipment
4. Flexible Delivery terms. EXW FOB CIF CFR DDP DDU
5. Flexible payment Ways: LC. TT. DP
6. Customized Package includes Logo. Cases Dimension.
7. 18 months quality Guarantee time.
9. Free replacement by air if any error founded
10. 24 hours to Feedback your questions
