Although a stub end is basically a part of a flange, stub ends are used in conjunction with a lap joint flange. However, since the component i.e. stub end dimensions have been covered under standard ASME B16.9, they are considered to be a part of fittings intended to be used in piping system. In a piping system that makes use of a lap joint flange, the ASME B16.9 Stub End is butt welded to the pipe. This leaves the flange to freely move over the welded stub end. This kind of flange-fitting arrangement proves to be beneficial to the end-user. Firstly, the lap joint flange used is of a lower alloy grade as compared to the material used to produce the stub end and the pipework.
ASME B16.9 Stub End
Stainless Steel Stub End
Carbon Steel Stub End
Thus leading to savings in not only the cost, but also the total weight of high alloy material grade used for the flanged joint. Another benefit is that the arrangement is easy to align due to the rotation of the lap joint flange on the pipe along with the simplification of the alignment of the bolt holes to its mating flanges. Carbon Steel Stub End has started to become popular for its use in high pressure piping systems as opposed to their use in the past for low pressure applications. Since the stub end fittings are to be welded, stainless steel grades that have a controlled carbon content are preferred for its manufacture. For instance, predominantly alloy grades 304L and 316L, where L indicates a low content of carbon are used to produce the Stainless Steel Long Neck Stub End.
Specifications | Stub End |
---|---|
Stub End Pipe Fittings size | Seamless Butt Weld Fittings: 1/2″ – 10″ Welded Butt Weld Fittings: 1/2″ – 48″ |
Stub End Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
Stub End Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
Stub End Types | Seamless / ERW / Welded / Fabricated Pipe Fittings |
Stub EndType | DN15-DN1200 |
Connection | Welding |
Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom Pipe Fittings |
Size Range | ½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) |
Stub End Fittings | Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D. Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO |
Manufacturing process | Push, Press, forge, Cast, etc. |
Stub End Fittings Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
Origin & Mills | Japanese, Indian, USA, Korean, European, Ukraine, Russian |
Key markets and industries for Stub End |
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Nominal Pipe Size | Outside diameterof barrel | Length (F) | Radius (R) | Diameter (G) | ||
---|---|---|---|---|---|---|
Minimum | Maximum | LongPattern | ShortPattern | |||
1/2″ | 20.5 | 22.8 | 76 | 51 | 3 | 35 |
3/4″ | 25.9 | 28.1 | 76 | 51 | 3 | 43 |
1″ | 32.6 | 35.0 | 102 | 51 | 3 | 51 |
1 1/4″ | 41.4 | 43.6 | 102 | 51 | 5 | 64 |
1 1/2″ | 47.5 | 49.9 | 102 | 51 | 6 | 74 |
2″ | 59.5 | 62.4 | 152 | 64 | 8 | 92 |
2 1/2″ | 72.2 | 75.3 | 152 | 64 | 8 | 105 |
3″ | 88.1 | 91.3 | 152 | 64 | 10 | 127 |
3 1/2″ | 100.8 | 104.0 | 152 | 76 | 10 | 140 |
4″ | 113.5 | 116.7 | 152 | 76 | 11 | 157 |
5″ | 140.5 | 144.3 | 203 | 76 | 11 | 186 |
6″ | 167.5 | 171.3 | 203 | 89 | 13 | 216 |
8″ | 218.3 | 222.1 | 203 | 102 | 13 | 270 |
10″ | 272.3 | 277.2 | 254 | 127 | 13 | 324 |
12″ | 323.1 | 328.0 | 254 | 152 | 13 | 381 |
14″ | 354.8 | 359.9 | 305 | 152 | 13 | 413 |
16″ | 405.6 | 411.0 | 305 | 152 | 13 | 470 |
18″ | 456.0 | 462.0 | 305 | 152 | 13 | 533 |
20″ | 507.0 | 514.0 | 305 | 152 | 13 | 584 |
22″ | 558.0 | 565.0 | 305 | 152 | 13 | 641 |
24″ | 609.0 | 616.0 | 305 | 152 | 13 | 692 |
Class 150 | 4″ | FNPT | 304 Stainless Steel | 300 psi | $141.84 / each |
Class 3000 | 1/8″ | FNPT | 304 Stainless Steel | 2570 psi@100 Degrees F | $20.08 / each |
Class 3000 | 1/8″ | FNPT | 316 Stainless Steel | 3000 psi@100 Degrees F | $71.07 / each |
Class 3000 | 1/4″ | FNPT | 304 Stainless Steel | 2570 psi@100 Degrees F | $20.45 / each |
Class 3000 | 1/4″ | FNPT | 316 Stainless Steel | 3000 psi@100 Degrees F | $28.22 / each |
Class 3000 | 3/8″ | FNPT | 304 Stainless Steel | 2570 psi@100 Degrees F | $21.12 / each |
Class 3000 | 3/8″ | FNPT | 316 Stainless Steel | 3000 psi@100 Degrees F | $39.45 / each |
Class 3000 | 1/2″ | FNPT | 304/304L Stainless Steel | 3000 psi @ 100 Degrees F | $60.51 / each |
STUB ENDS – ANSI B 16.9 and MSS SP-43 dimension |
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inches | ND | mm | Diameter of lap |
Radius of fillet |
Length F | ||
D |
G | R | R1 | MSS SP43 | ANSI B16.9 | ||
1/2 | 15 | 21,34 | 34,92 | 3,17 | 0,80 | 50,80 | 76,20 |
3/4 | 20 | 26,67 | 42,86 | 3,17 | 0,80 | 50,80 | 76,20 |
1 | 25 | 33,40 | 50,80 | 3,17 | 0,80 | 50,80 | 101,60 |
1 1/4 | 32 | 42,16 | 63,50 | 4,76 | 0,80 | 50,80 | 101,60 |
1 1/2 | 40 | 48,26 | 73,00 | 6,35 | 0,80 | 50,80 | 101,60 |
2 | 50 | 60,32 | 92,10 | 7,93 | 0,80 | 63,50 | 152,40 |
2 1/2 | 65 | 73,02 | 104,80 | 7,93 | 0,80 | 63,50 | 152,40 |
3 | 80 | 88,90 | 127,00 | 9,52 | 0,80 | 63,50 | 152,40 |
3 1/2 | 90 | 101,60 | 139,70 | 9,52 | 0,80 | 76,20 | 152,40 |
4 | 100 | 114,30 | 157,20 | 11,11 | 0,80 | 76,20 | 152,40 |
5 | 125 | 141,30 | 185,70 | 11,11 | 1,58 | 76,20 | 203,20 |
6 | 150 | 168,27 | 215,90 | 12,70 | 1,58 | 88,90 | 203,20 |
8 | 200 | 219,07 | 269,80 | 12,70 | 1,58 | 101,60 | 203,20 |
10 | 250 | 273,05 | 323,80 | 12,70 | 1,58 | 127,00 | 254,00 |
12 | 300 | 323,85 | 381,00 | 12,70 | 1,58 | 152,40 | 254,00 |
14 | 350 | 355,60 | 412,70 | 12,70 | 1,58 | 152,40 | 304,80 |
16 | 400 | 406,40 | 469,90 | 12,70 | 1,58 | 152,40 | 304,80 |
18 | 450 | 457,20 | 533,40 | 12,70 | 1,58 | 152,40 | 304,80 |
20 | 500 | 508,00 | 584,20 | 12,70 | 1,58 | 152,40 | 304,80 |
22 | 550 | 558,80 | 641,30 | 12,70 | 1,58 | 152,40 | 304,80 |
24 | 600 | 609,60 | 692,10 | 12,70 | 1,58 | 152,40 | 304,80 |
The lap thickness T shall not be less than nominal pipe wall thickness t |