Standard Buttweld Fittings
Butt Weld Fittings general
In the world of piping systems, a pipe fitting takes on the role of a vital component. Its purpose? To facilitate changes in direction, create branches, or alter the diameter of the pipe within the system. These fittings are intricately connected to the system through mechanical means. It’s worth noting that these fittings come in a multitude of variations, yet they consistently maintain the same characteristics, regardless of size or schedule, just like the pipes themselves.
Material and Performance
In the realm of fitting production, the most prevalent materials employed include carbon steel, stainless steel, cast iron, aluminum, copper, and a diverse array of plastics, among others.
Moreover, fittings, much like pipes, are at times internally outfitted with layers of materials that possess distinct qualities compared to the fittings themselves, thus giving rise to what are commonly known as ‘lined fittings.’
It is crucial to note that the selection of the fitting’s material is primarily determined during the pipe selection process, with the general practice being that the fitting is composed of the same material as the pipe itself.
Applications of Buttweld Fittings
A piping system employing buttweld fittings offers numerous inherent advantages when compared to alternative methods:
- The act of welding a fitting to the pipe renders it permanently leakproof.
- The seamless metal connection formed between the pipe and fitting enhances the overall system’s structural integrity.
- The smooth inner surface and gradual directional transitions mitigate pressure losses and turbulence while reducing susceptibility to corrosion and erosion.
- A welded system optimizes space utilization, requiring minimal installation area.
Product Range
PRODUCT:
LR/SR ELBOW 90 & 45 DEG., EQUAL & UNEQUAL TEE, CROSS, CONCENTRIC
& ECCENTRIC REDUCER, CAP, STUB END, LONG & SHORT U-BEND 180 DEG.,
LR BEND_R=2D, R= 2.5D, R=3D, R=4D, R=5D, R = 6D, R=10D.
SIZE:
FROM 1⁄2″ NB TO 24″ NB-SEAMLESS.
FROM 8″ NB TO 24″ NB SEAM WELDED.
FROM 10″ NB TO 72″ NB – TWO HALVES.
FROM 8″ NB TO 24″ NB SEAM WELDED.
FROM 10″ NB TO 72″ NB – TWO HALVES.
SCHEDULE:
SCH.5 TO SCH.XXS.
DIMENSION:
ASME / ANSI B16.9, B16.28
MATERIAL:
CARBON STEEL GRADE – A234 WPB, A234 WPB-W, A234 WPC, ETC.
STAINLESS STEEL GRADE – A403 WP 304/L, 304H, 316/L, 316H, 321, ETC.
ALLOY STEEL GRADE A420 WP1, 5, 9, 11, 22, WPL6 ETC.
COPPER NICKLE GRADE 90/10, 70/30.
HIGH TENSILE GRADES – WPHY 52, 60, 65, 70 ETC.
STAINLESS STEEL GRADE – A403 WP 304/L, 304H, 316/L, 316H, 321, ETC.
ALLOY STEEL GRADE A420 WP1, 5, 9, 11, 22, WPL6 ETC.
COPPER NICKLE GRADE 90/10, 70/30.
HIGH TENSILE GRADES – WPHY 52, 60, 65, 70 ETC.
Dimensions
Elbow 90deg. LR
Elbow 45deg. LR
Elbow 90deg. SR
Elbow 180deg. LR
Elbow 180deg. SR
Tee EQ
Tee Reducing
Reducer Concentric
Reducer Eccentric
End Cap
Stub End ASME B16.9
Stub End MSS SP43
Elbow 90deg. LR
Dimensions Butt Weld Elbows
45°-90° LR and 3D ASME B16.9
| NPS | O.D. D |
90° LR A |
45° LR B |
90° 3D A |
45° 3D B |
| 1/2 | 21.3 | 38 | 16 | ||
| 3/4 | 26.7 | 38 | 19 | 57 | 24 |
| 1 | 33.4 | 38 | 22 | 76 | 31 |
| 1.1/4 | 42.2 | 48 | 25 | 95 | 39 |
| 1.1/2 | 48.3 | 57 | 29 | 114 | 47 |
| 2 | 60.3 | 76 | 35 | 152 | 63 |
| 2.1/2 | 73 | 95 | 44 | 190 | 79 |
| 3 | 88.9 | 114 | 51 | 229 | 95 |
| 3.1/2 | 101.6 | 133 | 57 | 267 | 111 |
| 4 | 114.3 | 152 | 64 | 305 | 127 |
| 5 | 141.3 | 190 | 79 | 381 | 157 |
| 6 | 168.3 | 229 | 95 | 457 | 189 |
| 8 | 219.1 | 305 | 127 | 610 | 252 |
| 10 | 273 | 381 | 159 | 762 | 316 |
| 12 | 323.8 | 457 | 190 | 914 | 378 |
| 14 | 355.6 | 533 | 222 | 1067 | 441 |
| 16 | 406.4 | 610 | 254 | 1219 | 505 |
| 18 | 457 | 686 | 286 | 1372 | 568 |
| 20 | 508 | 762 | 318 | 1524 | 632 |
| 22 | 559 | 838 | 343 | 1676 | 694 |
| 24 | 610 | 914 | 381 | 1829 | 757 |
| 26 | 660 | 991 | 406 | 1981 | 821 |
| 28 | 711 | 1067 | 438 | 2134 | 883 |
| 30 | 762 | 1143 | 470 | 2286 | 946 |
| 32 | 813 | 1219 | 502 | 2438 | 1010 |
| 34 | 864 | 1295 | 533 | 2591 | 1073 |
| 36 | 914 | 1372 | 565 | 2743 | 1135 |
| 38 | 965 | 1448 | 600 | 2896 | 1200 |
| 40 | 1016 | 1524 | 632 | 3048 | 1264 |
| 42 | 1067 | 1600 | 660 | 3200 | 1326 |
| 44 | 1118 | 1676 | 695 | 3353 | 1389 |
| 46 | 1168 | 1753 | 727 | 3505 | 1453 |
| 48 | 1219 | 1829 | 759 | 3658 | 1516 |
Dimensions are in millimeters unless otherwise indicated. Wall thickness
Dimensional Tolerances of Butt Weld Elbows 45° & 90° LR & 3D ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Center to End LR (A/B) | 2 | 2 | 2 | 2 |
| Center to End 3D (A/B) | 3 | 3 | 3 | 3 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Center to End LR (A/B) | 2 | 2 | 3 | 5 |
| Center to End 3D (A/B) | 3 | 3 | 6 | 6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Elbow 45deg. LR
Dimensions Butt Weld Elbows
45°-90° LR and 3D ASME B16.9
| NPS | O.D. D |
90° LR A |
45° LR B |
90° 3D A |
45° 3D B |
| 1/2 | 21.3 | 38 | 16 | ||
| 3/4 | 26.7 | 38 | 19 | 57 | 24 |
| 1 | 33.4 | 38 | 22 | 76 | 31 |
| 1.1/4 | 42.2 | 48 | 25 | 95 | 39 |
| 1.1/2 | 48.3 | 57 | 29 | 114 | 47 |
| 2 | 60.3 | 76 | 35 | 152 | 63 |
| 2.1/2 | 73 | 95 | 44 | 190 | 79 |
| 3 | 88.9 | 114 | 51 | 229 | 95 |
| 3.1/2 | 101.6 | 133 | 57 | 267 | 111 |
| 4 | 114.3 | 152 | 64 | 305 | 127 |
| 5 | 141.3 | 190 | 79 | 381 | 157 |
| 6 | 168.3 | 229 | 95 | 457 | 189 |
| 8 | 219.1 | 305 | 127 | 610 | 252 |
| 10 | 273 | 381 | 159 | 762 | 316 |
| 12 | 323.8 | 457 | 190 | 914 | 378 |
| 14 | 355.6 | 533 | 222 | 1067 | 441 |
| 16 | 406.4 | 610 | 254 | 1219 | 505 |
| 18 | 457 | 686 | 286 | 1372 | 568 |
| 20 | 508 | 762 | 318 | 1524 | 632 |
| 22 | 559 | 838 | 343 | 1676 | 694 |
| 24 | 610 | 914 | 381 | 1829 | 757 |
| 26 | 660 | 991 | 406 | 1981 | 821 |
| 28 | 711 | 1067 | 438 | 2134 | 883 |
| 30 | 762 | 1143 | 470 | 2286 | 946 |
| 32 | 813 | 1219 | 502 | 2438 | 1010 |
| 34 | 864 | 1295 | 533 | 2591 | 1073 |
| 36 | 914 | 1372 | 565 | 2743 | 1135 |
| 38 | 965 | 1448 | 600 | 2896 | 1200 |
| 40 | 1016 | 1524 | 632 | 3048 | 1264 |
| 42 | 1067 | 1600 | 660 | 3200 | 1326 |
| 44 | 1118 | 1676 | 695 | 3353 | 1389 |
| 46 | 1168 | 1753 | 727 | 3505 | 1453 |
| 48 | 1219 | 1829 | 759 | 3658 | 1516 |
Dimensions are in millimeters unless otherwise indicated. Wall thickness
Dimensional Tolerances of Butt Weld Elbows 45° & 90° LR & 3D ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Center to End LR (A/B) | 2 | 2 | 2 | 2 |
| Center to End 3D (A/B) | 3 | 3 | 3 | 3 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Center to End LR (A/B) | 2 | 2 | 3 | 5 |
| Center to End 3D (A/B) | 3 | 3 | 6 | 6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Elbow 90deg. SR
Butt Weld Elbows
90°-SR- ASME B16.9
| NPS | O.D. D |
cte A |
NPS | O.D. D |
cte A |
| 1 | 33.4 | 25 | 8 | 219.1 | 203 |
| 1.1/4 | 42.2 | 32 | 10 | 273 | 254 |
| 1.1/2 | 48.3 | 38 | 12 | 323.8 | 305 |
| 2 | 60.3 | 51 | 14 | 355.6 | 356 |
| 2.1/2 | 73 | 64 | 16 | 406.4 | 406 |
| 3 | 88.9 | 76 | 18 | 457 | 457 |
| 3.1/2 | 101.6 | 89 | 20 | 508 | 508 |
| 4 | 114.3 | 102 | 22 | 559 | 559 |
| 5 | 141.3 | 127 | 24 | 610 | 610 |
| 6 | 168.3 | 152 | – | – | – |
Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.
*cte means Center to End dimensions.
Dimensional Tolerances of Butt Weld Elbows Short Radius 90° ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| cte (A) | 2 | 2 | 2 | 2 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| cte (A) | 2 | 2 | 3 | 5 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Elbow 180deg. LR
Butt Weld Elbows
180° LR & SR ASME B16.9
| NPS | O.D. D |
180° LR | 180° SR | ||
| Center to Center O |
Back to Face K |
Center to Center O |
Back to Face K |
||
| 1/2 | 21.3 | 76 | 48 | ||
| 3/4 | 26.7 | 76 | 51 | ||
| 1 | 33.4 | 76 | 56 | 51 | 41 |
| 1.1/4 | 42.2 | 95 | 70 | 64 | 52 |
| 1.1/2 | 48.3 | 114 | 83 | 76 | 62 |
| 2 | 60.3 | 152 | 106 | 102 | 81 |
| 2.1/2 | 73 | 190 | 132 | 127 | 100 |
| 3 | 88.9 | 229 | 159 | 152 | 121 |
| 3.1/2 | 101.6 | 267 | 184 | 178 | 140 |
| 4 | 114.3 | 305 | 210 | 203 | 159 |
| 5 | 141.3 | 381 | 262 | 254 | 197 |
| 6 | 168.3 | 457 | 313 | 305 | 237 |
| 8 | 219.1 | 610 | 414 | 406 | 313 |
| 10 | 273 | 762 | 518 | 508 | 391 |
| 12 | 323.8 | 914 | 619 | 610 | 467 |
| 14 | 355.6 | 1067 | 711 | 711 | 533 |
| 16 | 406.4 | 1219 | 813 | 813 | 610 |
| 18 | 457 | 1372 | 914 | 914 | 686 |
| 20 | 508 | 1524 | 1016 | 1016 | 762 |
| 22 | 559 | 1676 | 1118 | 1118 | 838 |
| 24 | 610 | 1829 | 1219 | 1219 | 914 |
Dimensions are in millimeters unless otherwise indicated.
Wall thickness (t) must be specified by customer.
Dimensional Tolerances of Butt Weld Elbows 180° LR & SR ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 |
| Center to Center (O) | 6 | 6 | 6 |
| Back to Face (K) | 6 | 6 | 6 |
| Nominal Pipe Size | 5 to 8 | 10 to 18 | 20 to 24 |
| Outside Diameter at Bevel (D) |
+ 2.4 – 1.6 |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 1.6 | 3.2 | 4.8 |
| Center to Center (O) | 6 | 10 | 10 |
| Back to Face (K) | 6 | 6 | 6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | ||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Elbow 180deg. SR
Butt Weld Elbows
180° LR & SR ASME B16.9
| NPS | O.D. D |
180° LR | 180° SR | ||
| Center to Center O |
Back to Face K |
Center to Center O |
Back to Face K |
||
| 1/2 | 21.3 | 76 | 48 | ||
| 3/4 | 26.7 | 76 | 51 | ||
| 1 | 33.4 | 76 | 56 | 51 | 41 |
| 1.1/4 | 42.2 | 95 | 70 | 64 | 52 |
| 1.1/2 | 48.3 | 114 | 83 | 76 | 62 |
| 2 | 60.3 | 152 | 106 | 102 | 81 |
| 2.1/2 | 73 | 190 | 132 | 127 | 100 |
| 3 | 88.9 | 229 | 159 | 152 | 121 |
| 3.1/2 | 101.6 | 267 | 184 | 178 | 140 |
| 4 | 114.3 | 305 | 210 | 203 | 159 |
| 5 | 141.3 | 381 | 262 | 254 | 197 |
| 6 | 168.3 | 457 | 313 | 305 | 237 |
| 8 | 219.1 | 610 | 414 | 406 | 313 |
| 10 | 273 | 762 | 518 | 508 | 391 |
| 12 | 323.8 | 914 | 619 | 610 | 467 |
| 14 | 355.6 | 1067 | 711 | 711 | 533 |
| 16 | 406.4 | 1219 | 813 | 813 | 610 |
| 18 | 457 | 1372 | 914 | 914 | 686 |
| 20 | 508 | 1524 | 1016 | 1016 | 762 |
| 22 | 559 | 1676 | 1118 | 1118 | 838 |
| 24 | 610 | 1829 | 1219 | 1219 | 914 |
Dimensions are in millimeters unless otherwise indicated.
Wall thickness (t) must be specified by customer.
Dimensional Tolerances of Butt Weld Elbows 180° LR & SR ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 |
| Center to Center (O) | 6 | 6 | 6 |
| Back to Face (K) | 6 | 6 | 6 |
| Nominal Pipe Size | 5 to 8 | 10 to 18 | 20 to 24 |
| Outside Diameter at Bevel (D) |
+ 2.4 – 1.6 |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 1.6 | 3.2 | 4.8 |
| Center to Center (O) | 6 | 10 | 10 |
| Back to Face (K) | 6 | 6 | 6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | ||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Tee EQ
Dimensions Butt Weld
Straight Tees ASME B16.9
| NPS | O.D. D |
Center to End C |
Center to End M |
| 1/2 | 21.3 | 25 | 25 |
| 3/4 | 26.7 | 29 | 29 |
| 1 | 33.4 | 38 | 38 |
| 1.1/4 | 42.2 | 48 | 48 |
| 1.1/2 | 48.3 | 57 | 57 |
| 2 | 60.3 | 64 | 64 |
| 2.1/2 | 73 | 76 | 76 |
| 3 | 88.9 | 86 | 86 |
| 3.1/2 | 101.6 | 95 | 95 |
| 4 | 114.3 | 105 | 105 |
| 5 | 141.3 | 124 | 124 |
| 6 | 168.3 | 143 | 143 |
| 8 | 219.1 | 178 | 178 |
| 10 | 273 | 216 | 216 |
| 12 | 323.8 | 254 | 254 |
| 14 | 355.6 | 279 | 279 |
| 16 | 406.4 | 305 | 305 |
| 18 | 457 | 343 | 343 |
| 20 | 508 | 381 | 381 |
| 22 | 559 | 419 | 419 |
| 24 | 610 | 432 | 432 |
| 26 | 660 | 495 | 495 |
| 28 | 711 | 521 | 521 |
| 30 | 762 | 559 | 559 |
| 32 | 813 | 597 | 597 |
| 34 | 864 | 635 | 635 |
| 36 | 914 | 673 | 673 |
| 38 | 965 | 711 | 711 |
| 40 | 1016 | 749 | 749 |
| 42 | 1067 | 762 | 711 |
| 44 | 1118 | 813 | 762 |
| 46 | 1168 | 851 | 800 |
| 48 | 1219 | 889 | 838 |
Dimensions are in millimeters unless otherwise indicated.
Wall thickness (t) must be specified by customer.
Outlet dimension (M) for NPS 26 and larger is recommended but not required.
Dimensional Tolerances Straight Tees ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 |
3 to 3.1/2 |
4 | 5 to 8 |
10 to 18 |
20 to 24 |
26 to 30 |
32 to 48 |
| Outside Dia at Bevel (D) |
+1.6 -0.8 |
1.6 | 1.6 | +2.4 -1.6 |
+4 -3.2 |
+6.4 -4.8 |
+6.4 -4.8 |
+6.4 -4.8 |
| Inside Dia at End | 0.8 | 1.6 | 1.6 | 1.6 | 3.2 | 4.8 | +6.4 -4.8 |
+6.4 -4.8 |
| Center to End (C / M) | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 |
| Wall Thk (t) | Not less than 87.5% of Nominal Wall Thickness | |||||||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Tee Reducing
Dimensions Butt Weld
Straight Tees ASME B16.9
| NPS | O.D. D |
Center to End C |
Center to End M |
| 1/2 | 21.3 | 25 | 25 |
| 3/4 | 26.7 | 29 | 29 |
| 1 | 33.4 | 38 | 38 |
| 1.1/4 | 42.2 | 48 | 48 |
| 1.1/2 | 48.3 | 57 | 57 |
| 2 | 60.3 | 64 | 64 |
| 2.1/2 | 73 | 76 | 76 |
| 3 | 88.9 | 86 | 86 |
| 3.1/2 | 101.6 | 95 | 95 |
| 4 | 114.3 | 105 | 105 |
| 5 | 141.3 | 124 | 124 |
| 6 | 168.3 | 143 | 143 |
| 8 | 219.1 | 178 | 178 |
| 10 | 273 | 216 | 216 |
| 12 | 323.8 | 254 | 254 |
| 14 | 355.6 | 279 | 279 |
| 16 | 406.4 | 305 | 305 |
| 18 | 457 | 343 | 343 |
| 20 | 508 | 381 | 381 |
| 22 | 559 | 419 | 419 |
| 24 | 610 | 432 | 432 |
| 26 | 660 | 495 | 495 |
| 28 | 711 | 521 | 521 |
| 30 | 762 | 559 | 559 |
| 32 | 813 | 597 | 597 |
| 34 | 864 | 635 | 635 |
| 36 | 914 | 673 | 673 |
| 38 | 965 | 711 | 711 |
| 40 | 1016 | 749 | 749 |
| 42 | 1067 | 762 | 711 |
| 44 | 1118 | 813 | 762 |
| 46 | 1168 | 851 | 800 |
| 48 | 1219 | 889 | 838 |
Dimensions are in millimeters unless otherwise indicated.
Wall thickness (t) must be specified by customer.
Outlet dimension (M) for NPS 26 and larger is recommended but not required.
Dimensional Tolerances Straight Tees ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 |
3 to 3.1/2 |
4 | 5 to 8 |
10 to 18 |
20 to 24 |
26 to 30 |
32 to 48 |
| Outside Dia at Bevel (D) |
+1.6 -0.8 |
1.6 | 1.6 | +2.4 -1.6 |
+4 -3.2 |
+6.4 -4.8 |
+6.4 -4.8 |
+6.4 -4.8 |
| Inside Dia at End | 0.8 | 1.6 | 1.6 | 1.6 | 3.2 | 4.8 | +6.4 -4.8 |
+6.4 -4.8 |
| Center to End (C / M) | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 |
| Wall Thk (t) | Not less than 87.5% of Nominal Wall Thickness | |||||||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Reducer Concentric
Butt Weld Reducers
Concentric and Eccentric ASME B16.9
| NPS | O.D. D |
O.D. D1 |
Length H |
| 3/4 – 1/2 | 26.7 | 21.3 | 38 |
| 1 – 1/2 | 33.4 | 21.3 | 51 |
| 1 – 3/4 | 33.4 | 26.7 | 51 |
| 1.1/4 – 1/2 | 42.2 | 21.3 | 51 |
| 1.1/4 – 3/4 | 42.2 | 26.7 | 51 |
| 1.1/4 – 1 | 42.2 | 33.4 | 51 |
| 1.1/2 – 1/2 | 48.3 | 21.3 | 64 |
| 1.1/2 – 3/4 | 48.3 | 26.7 | 64 |
| 1.1/2 – 1 | 48.3 | 33.4 | 64 |
| 1.1/2 – 1.1/4 | 48.3 | 42.2 | 64 |
| 2 – 3/4 | 60.3 | 26.7 | 76 |
| 2 – 1 | 60.3 | 33.4 | 76 |
| 2 – 1.1/4 | 60.3 | 42.2 | 76 |
| 2 – 1.1/2 | 60.3 | 48.3 | 76 |
| 2.1/2 – 1 | 73 | 33.4 | 89 |
| 2.1/2 – 1.1/4 | 73 | 42.2 | 89 |
| 2.1/2 – 1.1/2 | 73 | 48.3 | 89 |
| 2.1/2 – 2 | 73 | 60.3 | 89 |
| 3 – 1.1/4 | 88.9 | 42.2 | 89 |
| 3 – 1.1/2 | 88.9 | 48.3 | 89 |
| 3 – 2 | 88.9 | 60.3 | 89 |
| 3 – 2.1/2 | 88.9 | 73 | 89 |
| 3.1/2 – 1.1/4 | 101.6 | 42.2 | 102 |
| 3.1/2 – 1.1/2 | 101.6 | 48.3 | 102 |
| 3.1/2 – 2 | 101.6 | 60.3 | 102 |
| 3.1/2 – 2.1/2 | 101.6 | 73 | 102 |
| 3.1/2 – 3 | 101.6 | 88.9 | 102 |
| 4 – 1.1/2 | 114.3 | 48.3 | 102 |
| 4 – 2 | 114.3 | 60.3 | 102 |
| 4 – 2.1/2 | 114.3 | 73 | 102 |
| 4 – 3 | 114.3 | 88.9 | 102 |
| 4 – 3.1/2 | 114.3 | 101.6 | 102 |
| 5 – 2 | 141.3 | 60.3 | 127 |
| 5 – 2.1/2 | 141.3 | 73 | 127 |
| 5 – 3 | 141.3 | 88.9 | 127 |
| 5 – 3.1/2 | 141.3 | 101.6 | 127 |
| 5 – 4 | 141.3 | 114.3 | 127 |
| 6 – 2.1/2 | 168.3 | 73 | 140 |
| 6 – 3 | 168.3 | 88.9 | 140 |
| 6 – 3.1/2 | 168.3 | 101.6 | 140 |
| 6 – 4 | 168.3 | 114.3 | 140 |
| 6 – 5 | 168.3 | 141.3 | 140 |
| 8 – 3.1/2 | 219.1 | 101.6 | 152 |
| 8 – 4 | 219.1 | 114.3 | 152 |
| 8 – 5 | 219.1 | 141.3 | 152 |
| 8 – 6 | 219.1 | 168.3 | 152 |
| 10 – 4 | 273 | 114.3 | 178 |
| 10 – 5 | 273 | 141.3 | 178 |
| 10 – 6 | 273 | 168.3 | 178 |
| 10 – 8 | 273 | 219.1 | 178 |
| 12 – 5 | 323.9 | 141.3 | 203 |
| 12 – 6 | 323.9 | 168.3 | 203 |
| 12 – 8 | 323.9 | 219.1 | 203 |
| 12 – 10 | 323.9 | 273 | 203 |
| 14 – 6 | 355.6 | 168.3 | 330 |
| 14 – 8 | 355.6 | 219.1 | 330 |
| 14 – 10 | 355.6 | 273 | 330 |
| 14 – 12 | 355.6 | 323.9 | 330 |
| 16 – 8 | 406.4 | 219 | 356 |
| 16 – 10 | 406.4 | 273 | 356 |
| 16 – 12 | 406.4 | 323.9 | 356 |
| 16 – 14 | 406.4 | 355.6 | 356 |
| 18 – 10 | 457 | 273 | 381 |
| 18 – 12 | 457 | 323.9 | 381 |
| 18 – 14 | 457 | 355.6 | 381 |
| 18 – 16 | 457 | 406.4 | 381 |
| 20 – 12 | 508 | 323.9 | 508 |
| 20 – 14 | 508 | 355.6 | 508 |
| 20 – 16 | 508 | 406.4 | 508 |
| 20 – 18 | 508 | 457 | 508 |
| 22 – 14 | 559 | 355.6 | 508 |
| 22 – 16 | 559 | 406.4 | 508 |
| 22 – 18 | 559 | 457 | 508 |
| 22 – 20 | 559 | 508 | 508 |
| 24 – 16 | 610 | 406.4 | 508 |
| 24 – 18 | 610 | 457 | 508 |
| 24 – 20 | 610 | 508 | 508 |
| 24 – 22 | 610 | 559 | 508 |
| 26 – 18 | 660 | 457 | 610 |
| 26 – 20 | 660 | 508 | 610 |
| 26 – 22 | 660 | 559 | 610 |
| 26 – 24 | 660 | 610 | 610 |
| 28 – 18 | 711 | 457 | 610 |
| 28 – 20 | 711 | 508 | 610 |
| 28 – 24 | 711 | 610 | 610 |
| 28 – 26 | 711 | 660 | 610 |
| 30 – 20 | 762 | 508 | 610 |
| 30 – 24 | 762 | 610 | 610 |
| 30 – 26 | 762 | 660 | 610 |
| 30 – 28 | 762 | 711 | 610 |
| 32 – 24 | 813 | 610 | 610 |
| 32 – 26 | 813 | 660 | 610 |
| 32 – 28 | 813 | 711 | 610 |
| 32 – 30 | 813 | 762 | 610 |
| 34 – 24 | 864 | 610 | 610 |
| 34 – 26 | 864 | 660 | 610 |
| 34 – 30 | 864 | 762 | 610 |
| 34 – 32 | 864 | 813 | 610 |
| 36 – 24 | 914 | 610 | 610 |
| 36 – 26 | 914 | 660 | 610 |
| 36 – 30 | 914 | 762 | 610 |
| 36 – 32 | 914 | 813 | 610 |
| 36 – 34 | 914 | 864 | 610 |
| 38 – 26 | 965 | 660 | 610 |
| 38 – 28 | 965 | 711 | 610 |
| 38 – 30 | 965 | 762 | 610 |
| 38 – 32 | 965 | 813 | 610 |
| 38 – 34 | 965 | 864 | 610 |
| 38 – 36 | 965 | 914 | 610 |
| 40 – 30 | 1016 | 762 | 610 |
| 40 – 32 | 1016 | 813 | 610 |
| 40 – 34 | 1016 | 864 | 610 |
| 40 – 36 | 1016 | 914 | 610 |
| 40 – 38 | 1016 | 965 | 610 |
Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.
Dimensional Tolerances of Concentric and Eccentric Reducers ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) | + 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Overall Length (H) | 2 | 2 | 2 | 2 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) | + 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Overall Length (H) | 2 | 2 | 5 | 5 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Reducer Eccentric
Butt Weld Reducers
Concentric and Eccentric ASME B16.9
| NPS | O.D. D |
O.D. D1 |
Length H |
| 3/4 – 1/2 | 26.7 | 21.3 | 38 |
| 1 – 1/2 | 33.4 | 21.3 | 51 |
| 1 – 3/4 | 33.4 | 26.7 | 51 |
| 1.1/4 – 1/2 | 42.2 | 21.3 | 51 |
| 1.1/4 – 3/4 | 42.2 | 26.7 | 51 |
| 1.1/4 – 1 | 42.2 | 33.4 | 51 |
| 1.1/2 – 1/2 | 48.3 | 21.3 | 64 |
| 1.1/2 – 3/4 | 48.3 | 26.7 | 64 |
| 1.1/2 – 1 | 48.3 | 33.4 | 64 |
| 1.1/2 – 1.1/4 | 48.3 | 42.2 | 64 |
| 2 – 3/4 | 60.3 | 26.7 | 76 |
| 2 – 1 | 60.3 | 33.4 | 76 |
| 2 – 1.1/4 | 60.3 | 42.2 | 76 |
| 2 – 1.1/2 | 60.3 | 48.3 | 76 |
| 2.1/2 – 1 | 73 | 33.4 | 89 |
| 2.1/2 – 1.1/4 | 73 | 42.2 | 89 |
| 2.1/2 – 1.1/2 | 73 | 48.3 | 89 |
| 2.1/2 – 2 | 73 | 60.3 | 89 |
| 3 – 1.1/4 | 88.9 | 42.2 | 89 |
| 3 – 1.1/2 | 88.9 | 48.3 | 89 |
| 3 – 2 | 88.9 | 60.3 | 89 |
| 3 – 2.1/2 | 88.9 | 73 | 89 |
| 3.1/2 – 1.1/4 | 101.6 | 42.2 | 102 |
| 3.1/2 – 1.1/2 | 101.6 | 48.3 | 102 |
| 3.1/2 – 2 | 101.6 | 60.3 | 102 |
| 3.1/2 – 2.1/2 | 101.6 | 73 | 102 |
| 3.1/2 – 3 | 101.6 | 88.9 | 102 |
| 4 – 1.1/2 | 114.3 | 48.3 | 102 |
| 4 – 2 | 114.3 | 60.3 | 102 |
| 4 – 2.1/2 | 114.3 | 73 | 102 |
| 4 – 3 | 114.3 | 88.9 | 102 |
| 4 – 3.1/2 | 114.3 | 101.6 | 102 |
| 5 – 2 | 141.3 | 60.3 | 127 |
| 5 – 2.1/2 | 141.3 | 73 | 127 |
| 5 – 3 | 141.3 | 88.9 | 127 |
| 5 – 3.1/2 | 141.3 | 101.6 | 127 |
| 5 – 4 | 141.3 | 114.3 | 127 |
| 6 – 2.1/2 | 168.3 | 73 | 140 |
| 6 – 3 | 168.3 | 88.9 | 140 |
| 6 – 3.1/2 | 168.3 | 101.6 | 140 |
| 6 – 4 | 168.3 | 114.3 | 140 |
| 6 – 5 | 168.3 | 141.3 | 140 |
| 8 – 3.1/2 | 219.1 | 101.6 | 152 |
| 8 – 4 | 219.1 | 114.3 | 152 |
| 8 – 5 | 219.1 | 141.3 | 152 |
| 8 – 6 | 219.1 | 168.3 | 152 |
| 10 – 4 | 273 | 114.3 | 178 |
| 10 – 5 | 273 | 141.3 | 178 |
| 10 – 6 | 273 | 168.3 | 178 |
| 10 – 8 | 273 | 219.1 | 178 |
| 12 – 5 | 323.9 | 141.3 | 203 |
| 12 – 6 | 323.9 | 168.3 | 203 |
| 12 – 8 | 323.9 | 219.1 | 203 |
| 12 – 10 | 323.9 | 273 | 203 |
| 14 – 6 | 355.6 | 168.3 | 330 |
| 14 – 8 | 355.6 | 219.1 | 330 |
| 14 – 10 | 355.6 | 273 | 330 |
| 14 – 12 | 355.6 | 323.9 | 330 |
| 16 – 8 | 406.4 | 219 | 356 |
| 16 – 10 | 406.4 | 273 | 356 |
| 16 – 12 | 406.4 | 323.9 | 356 |
| 16 – 14 | 406.4 | 355.6 | 356 |
| 18 – 10 | 457 | 273 | 381 |
| 18 – 12 | 457 | 323.9 | 381 |
| 18 – 14 | 457 | 355.6 | 381 |
| 18 – 16 | 457 | 406.4 | 381 |
| 20 – 12 | 508 | 323.9 | 508 |
| 20 – 14 | 508 | 355.6 | 508 |
| 20 – 16 | 508 | 406.4 | 508 |
| 20 – 18 | 508 | 457 | 508 |
| 22 – 14 | 559 | 355.6 | 508 |
| 22 – 16 | 559 | 406.4 | 508 |
| 22 – 18 | 559 | 457 | 508 |
| 22 – 20 | 559 | 508 | 508 |
| 24 – 16 | 610 | 406.4 | 508 |
| 24 – 18 | 610 | 457 | 508 |
| 24 – 20 | 610 | 508 | 508 |
| 24 – 22 | 610 | 559 | 508 |
| 26 – 18 | 660 | 457 | 610 |
| 26 – 20 | 660 | 508 | 610 |
| 26 – 22 | 660 | 559 | 610 |
| 26 – 24 | 660 | 610 | 610 |
| 28 – 18 | 711 | 457 | 610 |
| 28 – 20 | 711 | 508 | 610 |
| 28 – 24 | 711 | 610 | 610 |
| 28 – 26 | 711 | 660 | 610 |
| 30 – 20 | 762 | 508 | 610 |
| 30 – 24 | 762 | 610 | 610 |
| 30 – 26 | 762 | 660 | 610 |
| 30 – 28 | 762 | 711 | 610 |
| 32 – 24 | 813 | 610 | 610 |
| 32 – 26 | 813 | 660 | 610 |
| 32 – 28 | 813 | 711 | 610 |
| 32 – 30 | 813 | 762 | 610 |
| 34 – 24 | 864 | 610 | 610 |
| 34 – 26 | 864 | 660 | 610 |
| 34 – 30 | 864 | 762 | 610 |
| 34 – 32 | 864 | 813 | 610 |
| 36 – 24 | 914 | 610 | 610 |
| 36 – 26 | 914 | 660 | 610 |
| 36 – 30 | 914 | 762 | 610 |
| 36 – 32 | 914 | 813 | 610 |
| 36 – 34 | 914 | 864 | 610 |
| 38 – 26 | 965 | 660 | 610 |
| 38 – 28 | 965 | 711 | 610 |
| 38 – 30 | 965 | 762 | 610 |
| 38 – 32 | 965 | 813 | 610 |
| 38 – 34 | 965 | 864 | 610 |
| 38 – 36 | 965 | 914 | 610 |
| 40 – 30 | 1016 | 762 | 610 |
| 40 – 32 | 1016 | 813 | 610 |
| 40 – 34 | 1016 | 864 | 610 |
| 40 – 36 | 1016 | 914 | 610 |
| 40 – 38 | 1016 | 965 | 610 |
Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.
Dimensional Tolerances of Concentric and Eccentric Reducers ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) | + 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Overall Length (H) | 2 | 2 | 2 | 2 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) | + 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Overall Length (H) | 2 | 2 | 5 | 5 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
End Cap
Dimensions Butt Weld
Caps ASME B16.9
| NPS | O.D. D |
Length H |
Length H(1) |
| 1/2 | 21.3 | 25 | 25 |
| 3/4 | 26.7 | 25 | 25 |
| 1 | 33.4 | 38 | 38 |
| 1.1/4 | 42.2 | 38 | 38 |
| 1.1/2 | 48.3 | 38 | 38 |
| 2 | 60.3 | 38 | 44 |
| 2.1/2 | 73 | 38 | 51 |
| 3 | 88.9 | 51 | 64 |
| 3.1/2 | 101.6 | 64 | 76 |
| 4 | 114.3 | 64 | 76 |
| 5 | 141.3 | 76 | 89 |
| 6 | 168.3 | 89 | 102 |
| 8 | 219.1 | 102 | 127 |
| 10 | 273 | 127 | 152 |
| 12 | 323.8 | 152 | 178 |
| 14 | 355.6 | 165 | 191 |
| 16 | 406.4 | 178 | 203 |
| 18 | 457 | 203 | 229 |
| 20 | 508 | 229 | 254 |
| 22 | 559 | 254 | 254 |
| 24 | 610 | 267 | 305 |
| 26 | 660 | 267 | – |
| 28 | 711 | 267 | – |
| 30 | 762 | 267 | – |
| 32 | 813 | 267 | – |
| 34 | 864 | 237 | – |
| 36 | 914 | 267 | – |
| 38 | 965 | 305 | – |
| 40 | 1016 | 305 | – |
| 42 | 1067 | 305 | – |
| 44 | 1118 | 343 | – |
| 46 | 1168 | 343 | – |
| 48 | 1219 | 343 | – |
General notes..
- Dimensions are in millimeters unless otherwise indicated.
- Wall thickness (t) must be specified by customer.
- The shape shall be ellipsoidal and shall conform to the requirements given in the ASME Boiler and Pressure Vessel Code.
- Length (H) applies for thickness not exceeding that given in column “Wall Thickness” for Length, H.
- Length (H1) applies for thickness greater than that given in column “Wall Thickness” for NPS 24 and smaller. For NPS 26 and larger, length H1 shall be by agreement between the manufacturerand purchaser.
Dimensional Tolerances of End Caps ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Overall Length (H) | 3 | 3 | 3 | 6 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Overall Length (H) | 6 | 6 | 10 | 10 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.
Weights of Buttweld Caps
| NPS | STD | XS | SCH 160 | XXS |
| 1 | 0.09 | 0.14 | 0.18 | 0.23 |
| 1.1/4 | 0.14 | 0.18 | 0.23 | 0.34 |
| 1.1/2 | 0.18 | 0.23 | 0.27 | 0.41 |
| 2 | 0.27 | 0.34 | 0.57 | 0.68 |
| 2.1/2 | 0.41 | 0.45 | 0.79 | 1.13 |
| 3 | 0.68 | 0.79 | 1.32 | 1.81 |
| 3.1/2 | 0.91 | 1.13 | – | 2.72 |
| 4 | 1.13 | 1.36 | 2.68 | 3.4 |
| 5 | 2.04 | 2.49 | 4.54 | 5.44 |
| 6 | 2.95 | 4.08 | 6.8 | 8.16 |
| 8 | 5.44 | 7.26 | 14.06 | 13.61 |
| 10 | 9.07 | 11.34 | 25.85 | – |
| 12 | 13.61 | 16.33 | 43.09 | – |
| 14 | 16.33 | 20.41 | – | – |
| 16 | 18.14 | 24.49 | – | – |
| 18 | 24.49 | 32.66 | – | – |
| 20 | 34.02 | 39.01 | – | – |
| 22 | 42.64 | 56.7 | – | – |
| 24 | 43.54 | 58.97 | – | – |
| 26 | 53.98 | 72.12 | – | – |
| 30 | 78.02 | 103.87 | – | – |
All weights are in kilograms and approximated or estimated.
Buttweld Fitting Weights
ASME buttweld fitting specifications do not specify weights for fittings. Weights quoted in the table on this page are based on manufacturers information and should be considered as approximate and provided as a guide only (fitting weights can vary considerably between manufacturers due to differences in construction).
Weights in these tables are taken from Hackney Ladish, Inc.
Hackney Ladish, Inc. is one of the largest and most versatile fitting producers in the world. Hackney Ladish, Inc. is headquartered in Dallas, TX and operates 2 facilities containing 380,000 square feet of manufacturing.
Stub End ASME B16.9
Dimensions Lap Joint Stub Ends
schedule STD XS ASME B16.9
Schedule STD
| NPS | OD | T | G | F | R | kg |
| 1/2 | 21.3 | 2.77 | 34.9 | 76.2 | 3.18 | 0.16 |
| 3/4 | 26.7 | 2.87 | 42.9 | 76.2 | 3.18 | 0.23 |
| 1 | 33.4 | 3.38 | 50.8 | 101.6 | 3.18 | 0.29 |
| 1.1/4 | 42.2 | 3.56 | 63.5 | 101.6 | 4.76 | 0.45 |
| 1.1/2 | 48.3 | 3.68 | 73 | 101.6 | 6.35 | 0.54 |
| 2 | 60.3 | 3.91 | 92.1 | 152.4 | 7.94 | 1 |
| 2.1/2 | 73 | 5.16 | 104.8 | 152.4 | 7.94 | 1.5 |
| 3 | 88.9 | 5.49 | 127 | 152.4 | 9.53 | 2.1 |
| 3.1/2 | 101.6 | 5.74 | 139.7 | 152.4 | 9.53 | 2.5 |
| 4 | 114.3 | 6.02 | 157.2 | 152.4 | 11.11 | 3 |
| 5 | 141.3 | 6.55 | 185.7 | 203.2 | 11.11 | 5.4 |
| 6 | 168.3 | 7.11 | 215.9 | 203.2 | 12.70 | 7.3 |
| 8 | 219.1 | 8.18 | 269.9 | 203.2 | 12.70 | 11.6 |
| 10 | 273.1 | 9.27 | 323.9 | 254 | 12.70 | 18 |
| 12 | 323.9 | 9.53 | 381 | 254 | 12.70 | 21 |
| 14 | 355.6 | 9.53 | 412.8 | 304.8 | 12.70 | 28 |
| 16 | 406.4 | 9.53 | 469.9 | 304.8 | 12.70 | 34 |
| 18 | 457.2 | 9.53 | 533.4 | 304.8 | 12.70 | 39 |
| 20 | 508 | 9.53 | 584.2 | 304.8 | 12.70 | 44 |
| 24 | 609.6 | 9.53 | 692.2 | 304.8 | 12.70 | 57 |
Dimensions are in millimeters unless otherwise indicated. Weights are in kilograms and approximately given.
Schedule XS
| NPS | OD | T | G | F | R | kg |
| 1/2 | 21.3 | 3.73 | 34.9 | 76.2 | 3.18 | 0.2 |
| 3/4 | 26.7 | 3.91 | 42.9 | 76.2 | 3.18 | 0.3 |
| 1 | 33.4 | 4.55 | 50.8 | 101.6 | 3.18 | 0.4 |
| 1.1/4 | 42.2 | 4.85 | 63.5 | 101.6 | 4.76 | 0.6 |
| 1.1/2 | 48.3 | 5.08 | 73 | 101.6 | 6.35 | 0.7 |
| 2 | 60.3 | 5.54 | 92.1 | 152.4 | 7.94 | 1.4 |
| 2.1/2 | 73 | 7.01 | 104.8 | 152.4 | 7.94 | 2 |
| 3 | 88.9 | 7.62 | 127 | 152.4 | 9.53 | 2.9 |
| 3.1/2 | 101.6 | 8.08 | 139.7 | 152.4 | 9.53 | 3.4 |
| 4 | 114.3 | 8.56 | 157.2 | 152.4 | 11.11 | 4.1 |
| 5 | 141.3 | 9.53 | 185.7 | 203.2 | 11.11 | 7.5 |
| 6 | 168.3 | 10.97 | 215.9 | 203.2 | 12.70 | 10 |
| 8 | 219.1 | 12.70 | 269.9 | 203.2 | 12.70 | 16 |
| 10 | 273.1 | 12.70 | 323.9 | 254 | 12.70 | 24 |
| 12 | 323.9 | 12.70 | 381 | 254 | 12.70 | 29 |
| 14 | 355.6 | 12.70 | 412.8 | 304.8 | 12.70 | 38 |
| 16 | 406.4 | 12.70 | 469.9 | 304.8 | 12.70 | 43 |
| 18 | 457.2 | 12.70 | 533.4 | 304.8 | 12.70 | 49 |
| 20 | 508 | 12.70 | 584.2 | 304.8 | 12.70 | 63 |
| 24 | 609.6 | 12.70 | 692.2 | 304.8 | 12.70 | 76 |
Dimensions are in millimeters unless otherwise indicated. Weights are in kilograms and approximately given.
Dimensional Tolerances of Stub Ends ASME B16.9
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 | 10 to 18 | 20 to 24 |
| Outside Diameter at Welding End (OD) | + 1.6 – 0.8 |
1.6 | 1.6 | + 2.29 – 1.6 |
+ 4.06 – 3.05 |
+ 6.35 – 4.83 |
| Overall Length (F) | 1.6 | 1.6 | 1.6 | 1.6 | 2 | 2 |
| Outside Diameter of Lap (G) | + 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 1.6 |
+ 0 – 1.6 |
| Thickness of Lap (T) | + 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
| Fillet Radius of Lap (R) | + 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 1.6 |
+ 0 – 1.6 |
+ 0 – 1.6 |
+ 0 – 1.6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||||
Dimensional tolerances are in millimeters unless otherwise indicated.
Stub End MSS SP43
Dimensions butt welded Stub Ends
schedule 10S MSS SP-43 type A/B
| NPS | OD | T | G | F | R Type A |
R Type B |
| 1/2 | 21.3 | 2.11 | 34.9 | 50.8 | 3.05 | 0.76 |
| 3/4 | 26.7 | 2.11 | 42.9 | 50.8 | 3.05 | 0.76 |
| 1 | 33.4 | 2.77 | 50.8 | 50.8 | 3.05 | 0.76 |
| 1.1/4 | 42.2 | 2.77 | 63.5 | 50.8 | 4.83 | 0.76 |
| 1.1/2 | 48.3 | 2.77 | 73 | 50.8 | 6.35 | 0.76 |
| 2 | 60.3 | 2.77 | 92.1 | 63.5 | 7.87 | 0.76 |
| 2.1/2 | 73 | 3.05 | 104.8 | 63.5 | 7.87 | 0.76 |
| 3 | 88.9 | 3.05 | 127 | 63.5 | 9.65 | 0.76 |
| 3.1/2 | 101.6 | 3.05 | 139.7 | 76.2 | 9.65 | 0.76 |
| 4 | 114.3 | 3.05 | 157.2 | 76.2 | 11.18 | 0.76 |
| 5 | 141.3 | 3.40 | 185.7 | 76.2 | 11.18 | 1.52 |
| 6 | 168.3 | 3.40 | 215.9 | 88.9 | 12.7 | 1.52 |
| 8 | 219.1 | 3.76 | 269.9 | 101.6 | 12.7 | 1.52 |
| 10 | 273.1 | 4.19 | 323.9 | 127 | 12.7 | 1.52 |
| 12 | 323.9 | 4.57 | 381 | 152.4 | 12.7 | 1.52 |
| 14 | 355.6 | 4.78 | 412.8 | 152.4 | 12.70 | 1.52 |
| 16 | 406.4 | 4.78 | 469.9 | 152.4 | 12.7 | 1.52 |
| 18 | 457.2 | 4.78 | 533.4 | 152.4 | 12.70 | 1.52 |
| 20 | 508 | 5.54 | 584.2 | 152.4 | 12.70 | 1.52 |
| 24 | 609.6 | 6.35 | 692.2 | 152.4 | 12.7 | 1.52 |
Dimensions are in millimeters unless otherwise indicated. Weights are in kilograms and approximately given.
Dimensional Tolerances Stub Ends MSS SP-43
| Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 | 10 to 18 | 20 to 24 |
| Outside Diameter at Welding End (OD) | 0.8 | 0.8 | 0.8 | + 1.6 – 0.8 |
+ 2.29 – 0.76 |
+ 3.05 – 0.76 |
| Overall Length (F) | 1.6 | 1.6 | 1.6 | 1.6 | 2 | 2 |
| Outside Diameter of Lap (G) | + 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 1.6 |
+ 0 – 1.6 |
| Thickness of Lap (T) | + 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
+ 1.52 – 0 |
| Fillet Radius of Lap (R) | + 0 – 0.76 |
+ 0 – 0.76 |
+ 0 – 1.6 |
+ 0 – 1.6 |
+ 0 – 1.6 |
+ 0 – 1.6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||||
Dimensional tolerances are in millimeters unless otherwise indicated.
Notes..
- Type A for Lap Joint Flanges
- Type B for Slip On Flanges
- MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.