A **stub bend**, sometimes referred to as a **lap joint stub end**, is a handy type of pipe fitting that works alongside a lap joint flange. It’s designed for easy assembly and disassembly of pipelines, making it perfect for situations where regular inspection or maintenance is a must. Typically crafted from materials like carbon steel, stainless steel, or alloy steel, stub bends come in two main varieties — the **Long Stub Bend** and the **Short Stub Bend** — which mainly differ in the length of their hub.
Dimensions : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size : 1/2″NB TO 36 “NB IN
Type : Seamless / ERW / Welded / Fabricated
Thickness : Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc.
Form : Long Stub Ends, Pipe Stub Ends, Butt weld Long Stub Ends.
| Short pattern stub end Pipe Fittings size | Seamless Butt Weld Fittings: 1/2″ – 10″ Welded Butt Weld Fittings: 1/2″ – 48″ |
|---|---|
| Specifications | ASME B16.9 Short stub end |
| Short type stub end Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
| lap joint stub end Short pattern 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 |
| Short stub ends Types | Seamless / ERW / Welded / Fabricated Pipe Fittings |
| Short spigot stub end Type | DN15-DN1200 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom Pipe Fittings |
| Application |
|
| Short type 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 |
| Size Range | ½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) |
| Manufacturing process | Push, Press, Forge, Cast, etc. |
The **Long Stub Bend** features a longer hub length, which offers better support for the flange and promotes a smoother flow of fluid through the joint. This type is often the go-to choice for high-pressure and high-temperature applications where extra reinforcement is crucial. Plus, the longer hub helps minimize turbulence and pressure drops in the pipeline.
| Product (Type “C”) | Length (J) | NPS | Sch 5S Approx. Weight | O.D. | Sch 5S, Wall Thick. (T) | Sch 5S, Inside Dia. (I.D.) |
|---|---|---|---|---|---|---|
| 1 1/2″ | 2 | 1.5 | 0.29 | 1.9 | 0.065 | 1.77 |
| 1 1/4″ | 2 | 1.25 | 0.21 | 1.66 | 0.065 | 1.53 |
| 1″ | 2 | 1 | 0.19 | 1.315 | 0.065 | 1.185 |
| 1/2″ | 2 | 0.5 | 0.13 | 0.84 | 0.065 | 0.71 |
| 10″ | 5 | 10 | 7.48 | 10.75 | 0.134 | 10.482 |
| 12″ | 6 | 12 | 15 | 12.75 | 0.156 | 12.438 |
| 14″ | 6 | 14 | 19.2 | 14 | 0.156 | 13.688 |
| 16″ | 6 | 16 | 23.9 | 16 | 0.165 | 15.67 |
| 18″ | 6 | 18 | 28.5 | 18 | 0.165 | 17.67 |
| 2 1/2″ | 2.5 | 2.5 | 0.75 | 2.875 | 0.083 | 2.709 |
| 2″ | 2.5 | 2 | 0.44 | 2.375 | 0.065 | 2.245 |
| 20″ | 6 | 20 | 36.3 | 20 | 0.188 | 19.624 |
| 24″ | 6 | 24 | 56 | 24 | 0.218 | 23.564 |
| 3″ | 2.5 | 3 | 0.94 | 3.5 | 0.083 | 3.334 |
| 3/4″ | 2 | 0.75 | 0.14 | 1.05 | 0.065 | 0.92 |
| 4″ | 3 | 4 | 1.38 | 4.5 | 0.083 | 4.334 |
| 5″ | 3 | 5 | 2.06 | 5.563 | 0.109 | 5.345 |
| 6″ | 3.5 | 6 | 2.75 | 6.625 | 0.109 | 6.407 |
| 8″ | 4 | 8 | 3.88 | 8.625 | 0.109 | 8.407 |
| Product (Type “A“) | NPS | Length (F), Short | Diameter(G) | I.D. | Wall Thick. (T) | O.D. | Thickness (t) | XX Strong Wall Approx. Weights | XX Strong Wall, Inside Dia (I.D.) |
|---|---|---|---|---|---|---|---|---|---|
| 1 1/2″ | 1.5 | 2 | 2.875 | 1.338 | 0.281 | 1.9 | 0.281 | 2.98 | 1.1 |
| 1 1/2″ | 1.5 | 4 | 2.875 | 0.15 | 1.49 | 1.9 | 0.15 | 1.5 | 0.2 |
| 1 1/4″ | 1.25 | 2 | 2.5 | 1.16 | 0.25 | 1.66 | 0.25 | 2.52 | 0.896 |
| 1 1/4″ | 1.25 | 4 | 2.5 | 0.14 | 1.26 | 1.66 | 0.14 | 1.278 | 0.191 |
| 1″ | 1 | 2 | 2 | 0.815 | 0.25 | 1.315 | 0.25 | 1.76 | 0.599 |
| 1″ | 1 | 4 | 2 | 0.133 | 0.88 | 1.315 | 0.133 | 0.957 | 0.179 |
| 1/2″ | 0.5 | 2 | 1.375 | 0.464 | 0.188 | 0.84 | 0.187 | 0.68 | 0.252 |
| 1/2″ | 0.5 | 3 | 1.375 | 0.109 | 0.34 | 0.84 | 0.109 | 0.546 | 0.147 |
| 10″ | 10 | 5 | 12.75 | 8.5 | 1.125 | 10.75 | 1.125 | – | – |
| 10″ | 10 | 10 | 12.75 | 0.365 | 54 | 10.75 | 0.365 | 9.75 | 0.5 |
| 12″ | 12 | 6 | 15 | 10.126 | 1.312 | 12.75 | 1.312 | – | – |
| 12″ | 12 | 10 | 15 | 0.375 | 64.5 | 12.75 | 0.375 | 11.75 | 0.5 |
| 14″ | 14 | 12 | 16.25 | 0.375 | 84 | 14 | 0.375 | 13 | 0.5 |
| 16″ | 16 | 12 | 18.5 | 0.375 | 98 | 16 | 0.375 | 15 | 0.5 |
| 18″ | 18 | 12 | 21 | 0.375 | 136 | 18 | 0.375 | 17 | 0.5 |
| 2 1/2″ | 2.5 | 2.5 | 4.125 | 2.125 | 0.375 | 2.875 | 0.375 | 8.8 | 1.771 |
| 2 1/2″ | 2.5 | 6 | 4.125 | 0.203 | 4.4 | 2.875 | 0.203 | 2.323 | 0.276 |
| 2″ | 2 | 2.5 | 3.625 | 1.689 | 0.343 | 2.375 | 0.343 | 6.1 | 1.503 |
| 2″ | 2 | 6 | 3.625 | 0.154 | 3.05 | 2.375 | 0.154 | 1.939 | 0.218 |
| 20″ | 20 | 12 | 23 | 0.375 | 157 | 20 | 0.375 | 19 | 0.5 |
| 3 1/2″ | 3.5 | 3 | 5.5 | – | – | 4 | – | 15.5 | 2.728 |
| 3 1/2″ | 3.5 | 6 | 5.5 | 0.226 | 7.75 | 4 | 0.226 | 3.364 | 0.318 |
| 3″ | 3 | 2.5 | 5 | 2.624 | 0.438 | 3.5 | 0.438 | 9.8 | 2.3 |
| 3″ | 3 | 6 | 5 | 0.216 | 6.5 | 3.5 | 0.216 | 2.9 | 0.3 |
| 3/4″ | 0.75 | 2 | 1.688 | 0.612 | 0.219 | 1.05 | 0.218 | 0.94 | 0.434 |
| 3/4″ | 0.75 | 3 | 1.688 | 0.113 | 0.47 | 1.05 | 0.113 | 0.742 | 0.154 |
| 4″ | 4 | 3 | 6.188 | 3.438 | 0.531 | 4.5 | 0.531 | 19.3 | 3.152 |
| 4″ | 4 | 6 | 6.188 | 0.237 | 9.65 | 4.5 | 0.237 | 3.826 | 0.337 |
| 5″ | 5 | 3 | 7.313 | 4.313 | 0.625 | 5.563 | 0.625 | 32.66 | 4.063 |
| 5″ | 5 | 8 | 7.313 | 0.258 | 16.33 | 5.563 | 0.258 | 4.813 | 0.375 |
| 6″ | 6 | 3.5 | 8.5 | 5.187 | 0.719 | 6.625 | 0.718 | 45.26 | 4.897 |
| 6″ | 6 | 8 | 8.5 | 0.28 | 22.63 | 6.625 | 0.28 | 5.761 | 0.432 |
| 8″ | 8 | 4 | 10.625 | 6.813 | 0.906 | 8.625 | 0.906 | 59.71 | 6.875 |
| 8″ | 8 | 8 | 10.625 | 0.322 | 34.12 | 8.625 | 0.322 | 7.625 | 0.5 |
On the flip side, the **Short Stub Bend** has a shorter hub and is ideal for systems where space is tight or where the pressure needs are more moderate. It delivers the same functionality as its longer counterpart but is more compact and budget-friendly for smaller or low-pressure setups.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Long and Short Stub Bend from Tolu Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
Long Stub and Short Stub Bends offer several advantages in piping systems. They provide superior strength and durability, making them ideal for high-pressure and high-temperature applications. These bends are designed to minimize turbulence and flow resistance, ensuring efficient fluid or gas movement. Their corrosion resistance, especially when made from materials like stainless steel, ensures long-lasting performance in harsh environments. Additionally, they are easy to install and maintain, with reduced risk of leakage. Versatile and reliable, Long and Short Stub Bends are widely used in industries like oil and gas, chemical processing, and power generation.
Yes, custom sizes are available for Long and Short Stub Bend to meet specific requirements. We offer tailored solutions to ensure precise fit and performance for various applications. For more information, please contact us at sales@tolufittings.com.
Both types are commonly found in industries like oil and gas, petrochemical, power generation, and water treatment, offering flexibility and ease of installation in piping systems that require frequent disassembly or maintenance.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
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