MSS SP-97 Weldolet is a standard developed by the Manufacturers Standardization Society (MSS) that covers integrally reinforced forged branch outlet fittings, which are commonly known as "olets." The most common type of olet is the Weldolet. Weldolets are used to provide a branch connection in a piping system, typically connecting a smaller diameter branch pipe to a larger diameter main pipe. When using MSS SP-97 Weldolets, it is crucial to follow the standard's requirements to ensure the safety and reliability of the piping system. Engineers and designers should consult the latest version of the standard for the most up-to-date information and specifications.
Specification Chart: | MSS SP-97 Weldolet |
---|---|
Manufacturer Types | Weldolet Sockolet Threadolet Elbolet Nipolet Latrolet Sweepolet Insert Weldolet Brazolet Coupolet |
Weldolet Uses | MSS SP 97 Weldolet refers to its branch welded onto outlet pipe. |
Packing | plywood cases, pallets, or as per your request. |
Surface treatment | anti-oil; anti-painting |
Standard | GB / ANSI /JIS / DIN |
Method Types | Threaded (NPT) Socket Weld BSPT BSP |
Type Of Standards | MSS SP-97 |
Manufacturer Size | SW Fitting = ½” Inch To 8” Inch Threaded (NPT) Fitting = ½” Inch To 8” Inch |
Pressure Class | SW Fitting = Class 3000/ Class 6000/ Class 9000 NPT Fitting = Class 2000/ Class 3000/ Class 6000 |
Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
Production Technique | Forged/ Heat treated and machined |
Application | Power/ gas/ petroleum/ chemical/ metallurgy/ shipbuilding etc. |
Normal Pipe Size | (A) | (B) | (C) | (D) |
1/2 | 3/4 19.05 |
1.3/8 34.93 |
15/16 23.81 |
5/8 15.88 |
3/4 | 7/8 22.23 |
1.5/8 41.28 |
1.3/16 30.16 |
13/16 20.64 |
1 | 1.1/16 26.99 |
2 50.80 |
1.7/16 36.51 |
1.1/32 26.19 |
1.1/4 | 1.1/4 31.75 |
2.3/8 60.3 |
1.3/4 44.45 |
1.3/8 34.93 |
1.1/2 | 1.5/16 33.34 |
2.7/8 73 |
2 50.80 |
1.5/8 41.28 |
2 | 1.1/2 38.10 |
3.1/2 88.90 |
2.9/16 65.09 |
2.1/16 52.39 |
2.1/2 | 1.5/8 41.28 |
4.1/16 103.19 |
3 76.20 |
2.7/16 61.91 |
3 | 1.3/4 44.45 |
4.13/16 122.24 |
3.11/16 93.66 |
3.1/16 77.79 |
3.1/2 | 2 50.80 |
5.3/8 136.53 |
3.7/8 98.43 |
3.9/16 90.49 |
4 | 2 50.80 |
6 152.40 |
4.3/4 120.65 |
4 101.60 |
5 | 2.1/4 57.15 |
7.1/8 180.98 |
5.9/16 141.29 |
5.1/16 128.59 |
6 | 2.3/8 60.3 |
8.1/2 215.90 |
6.11/16 169.86 |
6.1/16 153.99 |
8 | 2.3/4 69.85 |
10.3/8 263.53 |
8.11/16 220.66 |
7.15/16 201.61 |
10 | 3.1/16 77.79 |
12.9/16 319.09 |
10.13/16 274.64 |
10 254.00 |
12 | 3.3/8 85.73 |
14.7/8 377.83 |
12.13/16 325.44 |
12 304.80 |
14 | 3.1/2 88.90 |
16.1/8 409.58 |
14.1/16 357.19 |
13.1/4 336.55 |
16 | 3.11/16 93.66 |
18¼ 463.55 |
16.1/16 407.99 |
15¼ 387.35 |
18 | 4.1/16 103.19 |
20.3/4 527.05 |
18.5/8 473.08 |
17¼ 438.15 |
20 | 4.5/8 117.48 |
23.1/16 585.79 |
20.1/16 509.59 |
19¼ 488.95 |
24 | 5.3/8 136.53 |
27.7/8 708.03 |
25.1/8 638.18 |
23.1/4 590.55 |
NPS | (A) | (B) | (C) | (D) | (E) |
1/2″ | 25.4 | 35.71 | 23.01 | 15.8 | 14.28 |
3/4″ | 26.98 | 43.65 | 29.36 | 20.93 | 14.28 |
1″ | 33.33 | 50.8 | 36.51 | 26.64 | 19.84 |
1 1/4″ | 33.33 | 65.08 | 44.45 | 35.05 | 19.05 |
1 1/2″ | 34.92 | 72.23 | 50.8 | 40.89 | 19.05 |
2″ | 38.1 | 88.1 | 65.08 | 52.5 | 20.63 |
2 1/2″ | 39.68 | 103.18 | 76.2 | 62.71 | 19.05 |
3″ | 44.45 | 122.23 | 93.66 | 77.93 | 23.81 |
3 1/2″ | 42.86 | 136.52 | 112.71 | 90.12 | 17.46 |
4″ | 47.62 | 151.6 | 120.65 | 102.26 | 26.98 |
5″ | 66.67 | 185.73 | 141.28 | 128.19 | 34.13 |
6″ | 69.85 | 219.07 | 169.86 | 154.05 | 35.71 |
1/2″ | 31.75 | 43.65 | 19.05 | 11.84 | 22.22 |
3/4″ | 36.51 | 49.6 | 25.4 | 15.6 | 22.22 |
1″ | 39.68 | 61.91 | 33.33 | 20.7 | 23.81 |
1 1/4″ | 41.27 | 69.05 | 38.1 | 29.46 | 20.63 |
1 1/2″ | 42.86 | 82.55 | 49.21 | 33.99 | 22.22 |
2″ | 52.38 | 102.39 | 69.85 | 42.9 | 30.16 |
Nominal Sizes Of Elbow (Inch) |
Size Of Elbolet In Inches |
Elbolet Dimensions | |||
---|---|---|---|---|---|
Threaded Class 3000 & Socket Weld Std. & XS Buttweld |
Threaded Class 6000 & Socketweld Sch. 160 & XXS Buttweld |
||||
(C) | (E) | (C) | (E) | ||
36 - 3/4 | 1/4 | 1 1/2 | 1 19/32 | 1 1/2 | 1 19/32 |
36 - 3/4 | 3/8 | 1 1/2 | 1 19/32 | 1 1/2 | 1 19/32 |
36 - 3/4 | 1/2 | 1 1/2 | 1 19/32 | 1 23/32 | 1 7/8 |
36 - 1 | 3/4 | 1 23/32 | 1 7/8 | 2 1/4 | 2 1/4 |
36 - 2 | 1 | 2 1/4 | 2 1/4 | 2 7/8 | 2 1/2 |
36 - 2 | 1 1/4 | 2 7/8 | 2 1/2 | 3 1/8 | 2 11/16 |
36 - 2 | 1 1/2 | 3 1/8 | 2 11/16 | 4 3/16 | 3 1/4 |
36 - 3 | 2 | 4 3/16 | 3 1/4 | ||
**2 1/2 | 4 3/16 | 3 1/4 | |||
**3 | 5 1/16 | 3 7/8 | |||
Order to Specific | **4 | 6 5/8 | 4 13/16 | ||
Elbow Sizes | **6 | 9 3/8 | 6 1/2 | ** | ** |
**8 | 13 5/16 | 8 1/16 | |||
**10 | 17 1/32 | 10 3/8 | |||
**12 | 19 5/8 | 11 1/8 |
Normal Pipe Size | Face to Crotch (L) | |
---|---|---|
Class 3000 Latrolet | Class 6000 Latrolet | |
1/8" | 19 | – |
1/4" | 19 | – |
3/8" | 21 | – |
1/2" | 25 | 32 |
3/4" | 27 | 37 |
1" | 33 | 40 |
1 1/4" | 33 | 41 |
1 1/2" | 35 | 43 |
2" | 38 | 52 |
2 1/2" | 46 | – |
3" | 51 | – |
4" | 57 | – |
Size Of Normal Run | Size Of Outlet In Inch |
Sweepolet Dimensions | |
---|---|---|---|
(A) | (B) | ||
6 to 36 | 1 1/4 | 1 1/4 | 4 |
6 to 36 | 1 1/2 | 1 3/4 | 5 1/2 |
6 to 36 | 2 | 1 1/2 | 5 1/2 |
6 to 36 | 3 | 1 21/32 | 7 |
6 to 36 | 4 | 2 1/32 | 8 3/4 |
10 to 36 | 6 | 2 11/16 | 13 |
12 to 36 | 8 | 3 | 15 |
16 to 36 | 10 | 3 1/8 | 18 1/2 |
16 to 36 | 12 | 3 5/16 | 20 1/2 |
20 to 36 | 14 | 3 5/8 | 24 |
24 to 36 | 16 | 3 3/4 | 28 |
24 to 36 | 18 | 4 5/8 | 31 |
24 to 36 | 20 | 5 1/8 | 33 |
30 to 36 | 24 | 5 5/8 | 38 |
Normal Outlet Size In Inch |
(Height above run pipe) A' Dimensions | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 1/2 | 2 | 2 1/2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | |
Std Wt Run Pipe | 1.50 | 1.50 | 1.62 | 1.75 | 2.00 | 2.25 | 2.38 | 2.75 | 3.06 | 3.38 | 3.50 | 3.75 | 3.81 | 4 | 4.56 |
XS Run Pipe | 1.50 | 1.50 | 1.62 | 1.75 | 2.00 | 2.25 | 3.06 | 3.87 | 3.69 | 4.06 | 3.81 | 4.19 | 4.38 | 4.69 | 5.50 |
.500" to .750" Thickness Run Pipe | - | - | - | 2.88 | 3.31 | 3.75 | 4.12 | 4.18 | 4.25 | 4.37 | 4.50 | 4.69 | 5.13 | 5.62 | 6.50 |
.750" to 1.00" Thickness Run Pipe | - | - | - | 3.22 | 3.38 | 3.75 | 4.34 | 4.62 | 4.84 | 5.10 | 5.25 | 5.88 | 6.50 | 6.75 | 7.62 |
1.00" to 1.25" Thickness Run Pipe | - | - | - | 3.38 | 3.50 | 4.00 | 4.50 | 4.88 | 5.00 | 5.38 | 5.50 | 6.00 | 6.50 | 7.00 | 8.00 |
1.25" to 1.50" Thickness Run Pipe | - | - | - | 3.62 | 3.87 | 4.25 | 4.69 | 5.16 | 5.31 | 5.68 | 5.81 | 6.44 | 6.50 | 7.56 | 8.72 |
Normal Sizes Of Outlet | (A) | (B) | (C) | Brazing Surface | F-MIN. MIL-1183 |
---|---|---|---|---|---|
1/4 | 11/16 | 1 | 9/16 | 0.188 | 0.700 |
3/8 | 13/16 | 1 1/4 | 3/4 | 0.190 | 0.855 |
1/2 | 1 | 1 7/16 | 7/8 | 0.220 | 1.020 |
3/4 | 1 1/16 | 1 3/4 | 1 1/8 | 0.240 | 1.250 |
1 | 1 1/4 | 2 1/8 | 1 7/16 | 0.270 | 1.535 |
1 1/4 | 1 5/16 | 2 9/16 | 1 3/4 | 0.300 | 1.900 |
1 1/2 | 1 3/8 | 2 7/8 | 2 | 0.330 | 2.160 |
2 | 1 1/2 | 3 1/2 | 2 9/16 | 0.360 | 2.675 |
2 1/2 | 1 13/16 | 4 1/8 | 3 | 0.384 | 3.215 |
3 | 2 | 4 13/16 | 3 11/16 | 0.442 | 3.880 |
4 | 2 1/4 | 6 | 4 3/4 | 0.476 | 4.940 |
5 | 2 5/8 | 7 1/16 | 5 9/16 | 0.656 | 6.163 |
Threaded Coupolet Class 300 | |||
---|---|---|---|
Nominal Size Of Outlet (NOS) |
Coupolet Dimensions | ||
(A) | (C) | (F) | |
1/2 | 15/16 | 0.745 | 1.188 |
3/4 | 1 | 0.958 | 1.441 |
1 | 1 3/16 | 1.188 | 1.562 |
1 1/4 | 1 5/16 | 1.550 | 1.906 |
1 1/2 | 1 9/16 | 1.780 | 2.188 |
2 | 1 11/16 | 2.260 | 2.750 |
2 1/2 | 1 13/16 | 2.890 | 3.386 |
3 | 2 1/2 | 3.400 | 4.000 |
4 | 3 | 4.380 | 5.000 |
Size Of Weldolet In inches | (A) | (B) | (C) | (D) | Weight in LBS |
1/2 | 3/4 | 1 3/8 | 15/16 | 5/8 | 0.15 |
3/4 | 7/8 | 1 5/8 | 1 3/16 | 13/16 | 0.25 |
1 | 1 1/16 | 2 | 1 7/16 | 1 1/32 | 0.4 |
1 1/4 | 1 1/4 | 2 3/8 | 1 3/4 | 1 3/8 | 0.7 |
1 1/2 | 1 5/16 | 2 7/8 | 2 | 1 5/8 | 0.8 |
2 | 1 1/2 | 3 1/2 | 2 9/16 | 2 1/16 | 1.5 |
2 1/2 | 1 5/8 | 4 1/6 | 3 | 2 7/16 | 2.25 |
3 | 1 3/4 | 4 13/16 | 3 11/16 | 3 1/16 | 3.75 |
3 1/2 | 2 | 5 3/8 | 3 7/8 | 3 9/16 | 5 |
4 | 2 | 6 | 4 3/4 | 4 | 6.7 |
5 | 2 1/4 | 7 1/8 | 5 9/16 | 5 1/16 | 8.5 |
6 | 2 3/8 | 8 1/2 | 6 11/16 | 6 1/16 | 14 |
8 | 2 3/4 | 10 3/8 | 8 11/16 | 7 15/16 | 28 |
10 | 3 1/16 | 12 9/16 | 10 13/16 | 10 | 39 |
12 | 3 3/8 | 14 7/8 | 12 13/16 | 12 | 65 |
14 | 3 1/2 | 16 1/8 | 14 1/16 | 13 1/4 | 70 |
16 | 3 11/16 | 18 1/4 | 16 1/16 | 15 1/4 | 92 |
18 | 4 1/16 | 20 3/4 | 18 5/8 | 17 1/4 | 125 |
20 | 4 5/8 | 23 1/16 | 20 1/16 | 19 1/4 | 175 |
24 | 5 3/8 | 27 7/8 | 25 1/8 | 23 1/4 | 280 |
30 | 5 3/8 | 34 1/16 | 30 7/16 | 29 1/4 | 440 |
36 | 5 3/8 | 34 1/16 | 36 1/2 | 35 1/4 | 1180 |
Size | Size in millimeter | Height Of (A) | Outer Diameter Of (B) | Hole Diameter C | Weight in Kilogram |
---|---|---|---|---|---|
1/4 | 8 | 14.3 | 25.4 | 15.9 | 0.04 |
3/8 | 10 | 19.05 | 31.75 | 19.05 | 0.07 |
1/2 | 15 | 19.05 | 34.93 | 23.81 | 0.08 |
3/4 | 20 | 22.23 | 44.45 | 30.16 | 0.11 |
1 | 25 | 26.99 | 53.98 | 36.51 | 0.23 |
1 1/4 | 32 | 31.75 | 65.09 | 44.45 | 0.36 |
1 1/2 | 40 | 33.34 | 73.03 | 50.8 | 0.45 |
2 | 50 | 38.1 | 88.9 | 65.09 | 0.79 |
2 1/2 | 65 | 41.28 | 103.19 | 76.2 | 1.13 |
3 | 80 | 44.45 | 122.24 | 93.66 | 1.81 |
3 1/2 | 90 | 47.63 | 142.88 | 112.71 | 2.5 |
4 | 100 | 50.8 | 152.4 | 120.65 | 2.86 |
5 | 130 | 57.15 | 179.3 | 141.29 | 4.65 |
6 | 150 | 60.33 | 215.9 | 169.86 | 6.44 |
8 | 200 | 69.85 | 263.53 | 220.66 | 10.66 |
10 | 250 | 77.79 | 322.26 | 274.64 | 17.69 |
12 | 300 | 85.73 | 377.83 | 325.44 | 26.76 |
14 | 350 | 88.9 | 409.58 | 357.19 | 29.94 |
16 | 400 | 93.6 | 463.55 | 407.99 | 34.02 |
18 | 450 | 96.84 | 520.7 | 458.79 | 44 |
20 | 500 | 101.6 | 571.5 | 508 | 53.52 |
24 | 600 | 144.5 | 717.5 | 609.6 | 101 |
26 | 650 | 155.6 | 778 | 660.4 | 120 |
30 | 750 | 174.6 | 893.6 | 762 | 190 |
36 | 900 | 206.4 | 1070 | 914.4 | 310 |
40 | 1000 | 225.4 | 1187.6 | 1016 | 435 |
42 | 1050 | 235 | 1244.6 | 1066.8 | 540 |
48 | 1200 | 241.3 | 1404 | 1219.2 | 750 |
Size | Size in millimeter | Height Of (A) | Outer Diameter Of (B) | Hole Diameter Of (C) | Weight in Kilogram |
---|---|---|---|---|---|
1/4 | 8 | N/A | 25.4 | 15.88 | 0.05 |
3/8 | 10 | N/A | 31.75 | 19.05 | 0.07 |
1/2 | 15 | 19.05 | 34.93 | 23.81 | 0.09 |
3/4 | 20 | 22.23 | 44.45 | 30.16 | 0.14 |
1 | 25 | 26.99 | 53.98 | 36.51 | 0.21 |
1 1/4 | 32 | 31.75 | 65.09 | 44.45 | 0.41 |
1 1/2 | 40 | 33.34 | 73.03 | 50.8 | 0.5 |
2 | 50 | 38.1 | 88.9 | 65.09 | 0.79 |
2 1/2 | 65 | 41.28 | 103.19 | 76.2 | 1.18 |
3 | 80 | 44.45 | 122.24 | 93.66 | 1.86 |
3 1/2 | 90 | 47.63 | 136.53 | 112.71 | 2.54 |
4 | 100 | 50.8 | 152.4 | 120.65 | 2.9 |
6 | 150 | 77.79 | 225.43 | 169.86 | 10.43 |
8 | 200 | 98.43 | 292.1 | 220.66 | 16.78 |
10 | 250 | 93.66 | 323.85 | 265.11 | 20.87 |
12 | 300 | 103.1 | 379.41 | 317.5 | 27.67 |
14 | 350 | 100.01 | 431.8 | 350.84 | 31.75 |
16 | 400 | 106.36 | 466.73 | 403.23 | 46.27 |
18 | 450 | 111.13 | 523.88 | 455.61 | 58.97 |
20 | 500 | 119.06 | 582.61 | 509.59 | 71.67 |
24 | 600 | 152.4 | 722.2 | 609.6 | 142 |
26 | 650 | 165.1 | 782.6 | 660.4 | 168 |
30 | 750 | 181 | 896.8 | 762 | 218 |
36 | 900 | 212.7 | 1074.4 | 914.4 | 404 |
40 | 1000 | 235 | 1194 | 1016 | 582 |
42 | 1050 | 244.5 | 1250.8 | 1066.8 | 590 |
48 | 1200 | 273 | 1425.6 | 1219.2 | 910 |
Size | Size in millimeter | Height Of (A) | Outer Diameter Of (B) | Hole Diameter Of (C) | Weight in Kilogram |
---|---|---|---|---|---|
1/2 | 15 | 28.58 | 34.93 | 14.29 | 0.11 |
3/4 | 20 | 31.75 | 44.45 | 19.05 | 0.32 |
1 | 25 | 38.1 | 50.8 | 25.4 | 0.38 |
1 1/4 | 32 | 44.45 | 61.91 | 33.34 | 0.57 |
1 1/2 | 40 | 50.8 | 69.85 | 38.1 | 0.79 |
2 | 50 | 55.56 | 80.96 | 42.86 | 0.97 |
2 1/2 | 65 | 61.91 | 96.84 | 53.98 | 1.53 |
3 | 80 | 73.03 | 120.65 | 73.03 | 2.87 |
4 | 100 | 84.14 | 152.4 | 98.43 | 4.76 |
5 | 130 | 93.66 | 187.33 | 122.24 | 6.46 |
6 | 150 | 104.78 | 220.66 | 146.05 | 12.7 |
8 | 200 | 111.12 | 284.16 | 173.04 | 20.41 |
10 | 250 | 125.41 | 312.74 | 215.9 | 38.56 |
Size | Size in millimeter | Height Of (A) | Outer Diameter Of (B) | Hole Diameter Of C | Weight in Kilogram |
---|---|---|---|---|---|
1/2 | 15 | 28.58 | 34.93 | 14.29 | 0.11 |
3/4 | 20 | 31.75 | 44.45 | 19.05 | 0.32 |
1 | 25 | 38.1 | 50.8 | 25.4 | 0.38 |
1 1/4 | 32 | 44.45 | 61.91 | 33.34 | 0.57 |
1 1/2 | 40 | 50.8 | 69.85 | 38.1 | 0.79 |
2 | 50 | 55.56 | 80.96 | 42.86 | 0.97 |
2 1/2 | 65 | 61.91 | 96.84 | 53.98 | 1.53 |
3 | 80 | 73.03 | 120.65 | 73.03 | 2.87 |
4 | 100 | 84.14 | 152.4 | 98.43 | 4.76 |
5 | 130 | 93.66 | 187.33 | 122.24 | 6.46 |
6 | 150 | 104.78 | 220.66 | 146.05 | 12.7 |
8 | 200 | 111.12 | 284.16 | 173.04 | 20.41 |
10 | 250 | 125.41 | 312.74 | 215.9 | 38.56 |
Pressure | Normal Pipe Size | (A) | (B) | (C) | (D) |
STD | 1/2″ | 19.05 | 34.93 | 23.81 | 15.88 |
STD | 3/4″ | 22.23 | 41.28 | 30.16 | 20.64 |
STD | 1″ | 26.99 | 50.8 | 36.51 | 26.19 |
STD | 1 1/4″ | 31.75 | 60.3 | 44.45 | 34.93 |
STD | 1 1/2″ | 33.34 | 73 | 50.8 | 41.28 |
STD | 2″ | 38.1 | 88.9 | 65.09 | 52.39 |
STD | 2 1/2″ | 41.28 | 103.19 | 76.2 | 61.91 |
STD | 3″ | 44.45 | 122.24 | 93.66 | 77.79 |
STD | 3 1/2″ | 50.8 | 136.53 | 98.43 | 90.49 |
STD | 4″ | 50.8 | 152.4 | 120.65 | 101.6 |
STD | 5″ | 57.15 | 180.98 | 141.29 | 128.59 |
STD | 6″ | 60.3 | 215.9 | 169.86 | 153.99 |
STD | 8″ | 69.85 | 263.53 | 220.66 | 201.61 |
STD | 10″ | 77.79 | 319.09 | 274.64 | 254 |
STD | 12″ | 85.73 | 377.83 | 325.44 | 304.8 |
STD | 14″ | 88.9 | 409.58 | 357.19 | 336.55 |
STD | 16″ | 93.66 | 463.55 | 407.99 | 387.35 |
STD | 18″ | 103.19 | 527.05 | 473.08 | 438.15 |
STD | 20″ | 117.48 | 585.79 | 509.59 | 488.95 |
STD | 24″ | 136.53 | 708.03 | 638.18 | 590.55 |
XS | 1/2″ | 19.05 | 34.93 | 23.81 | 15.88 |