Leading Supplier of High-Quality Lap Joint Stub End Fittings
A Lap Joint Stub End is a buttweld pipe fitting designed to be used in conjunction with a lap joint flange. It enables easy disassembly and alignment of piping systems, making it a preferred choice in industries where frequent maintenance or inspection is required. Stub ends are primarily utilized in systems where space constraints or corrosion resistance is a priority, as they help reduce the risk of flange-face damage. Available in various materials like stainless steel, carbon steel, and alloy steel, these fittings are suitable for applications in oil and gas, chemical processing, and water treatment industries.
Long Stub Ends are used in standard piping systems where the connection needs additional strength or when the piping alignment requires extended support. Short Stub Ends are ideal for compact spaces or low-pressure applications. Both types are manufactured as per ASME B16.9 standards to ensure dimensional accuracy and reliability. The choice between long and short stub ends depends on specific project requirements such as pressure, temperature, and installation space.
Ample Alloys takes pride in being a trusted manufacturer of Stub Ends, designed to deliver reliable and efficient performance in diverse piping systems. Whether it's Long Stub Ends for extended support or Short Stub Ends for compact installations, our products are tailored to meet the specific needs of various industries. Using advanced manufacturing techniques and high-grade materials, we ensure our Stub Ends offer exceptional strength, precision, and resistance to corrosion. At Ample Alloys, we are committed to providing high-quality fittings that meet global standards, making us a preferred partner for critical applications in industries.
ASME B16.9 Stub End Fittings, Long Lap Joint Stub End, Short Lap Joint Stub End, Stainless Steel Stub End, Carbon Steel Stub End, Long Stub End, Short Stub End Fittings, Custom Lap Joint Stub End Fittings
Buttweld Long Stub End Specifications
Size Range
1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Wall Thickness
Sch 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, XS, 100, 120, 140, 160, Sch XXS
Stainless Steel
ASTM A403 WP 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.
Standards / Dimension
ASME B16.9, ASME B16.28, MSS SP-43, MSS SP-75, ASTM A234, ASTM A403, DIN 2605, 2615, 2616, 2617, 10253.
Type / Form
long, short, lap joint stub end.
Alloy Steel
ASTM A234, WP1, WP5, WP9, WP11, WP22, WP91, etc.
Bending Radius
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Carbon Steel
ASTM A234, A420, MSS-SP-75, WPB, WPL3, WPL6, WPHY 42, WPHY 46, WPHY 52, WPHY 56, WPHY 60, WPHY 65, WPHY 70
Duplex & Super Duplex
ASTM A815 / A815M, UNS S31803 / 2205, UNS S32205, UNS S32101 / LDX 2101, UNS S32750 / 2507, UNS S32760, UNS S32550 / Ferralium 255.
Lap Joint Stub End Dimensions
| Nominal Size | Outside Diameter of Barrel | Long Pattern Length, F |
Short Pattern Length, F |
Radius of Fillet, R |
Diameter of Lap, G |
|
|---|---|---|---|---|---|---|
| NPS | Max. mm. in. |
Min. mm. in. |
mm. in. |
mm. in. |
mm. in. |
mm. in. |
| 1/2 | 22.8 0.896 |
20.5 0.809 |
76 3.00 |
51 2.00 |
3 0.12 |
35 1.38 |
| 3/4 | 28.1 1.106 |
25.9 1.019 |
76 3.00 |
51 2.00 |
3 0.12 |
43 1.69 |
| 1 | 35.0 1.376 |
32.6 1.284 |
102 4.00 |
51 2.00 |
3 0.12 |
51 2.00 |
| 1 1/4 | 43.6 1.716 |
41.4 1.629 |
102 4.00 |
51 2.00 |
5 0.19 |
64 2.50 |
| 1 1/2 | 49.9 1.965 |
47.5 1.869 |
102 4.00 |
51 2.00 |
6 0.25 |
73 2.88 |
| 2 | 62.4 2.456 |
59.5 2.344 |
152 6.00 |
64 2.50 |
8 0.31 |
92 3.62 |
| 2 1/2 | 75.3 2.966 |
72.2 2.844 |
152 6.00 |
64 2.50 |
8 0.31 |
105 4.12 |
| 3 | 91.3 3.596 |
88.1 3.469 |
152 6.00 |
64 2.50 |
10 0.38 |
127 5.00 |
| 3 1/2 | 104.0 4.096 |
100.8 3.969 |
152 6.00 |
76 3.00 |
10 0.38 |
140 5.50 |
| 4 | 116.7 4.593 |
113.5 4.469 |
152 6.00 |
76 3.00 |
11 0.44 |
157 6.19 |
| 5 | 144.3 5.683 |
140.5 5.532 |
203 8.00 |
76 3.00 |
11 0.44 |
186 7.31 |
| 6 | 171.3 6.743 |
167.5 6.594 |
203 8.00 |
89 3.50 |
13 0.50 |
216 8.50 |
| 8 | 222.1 8.743 |
218.3 8.594 |
203 8.00 |
102 4.00 |
13 0.50 |
270 10.62 |
| 10 | 277.2 10.913 |
272.3 10.719 |
254 10.00 |
127 5.00 |
13 0.50 |
324 12.75 |
| 12 | 328.0 12.913 |
323.1 12.719 |
254 10.00 |
152 6.00 |
13 0.50 |
381 15.00 |
| 14 | 359.9 14.170 |
354.8 13.969 |
305 12.00 |
152 6.00 |
13 0.50 |
413 16.25 |
| 16 | 411.0 16.180 |
405.6 15.969 |
305 12.00 |
152 6.00 |
13 0.50 |
470 18.50 |
| 18 | 462.0 18.190 |
456.0 17.969 |
305 12.00 |
152 6.00 |
13 0.50 |
533 21.00 |
| 20 | 514.0 20.240 |
507.0 19.969 |
305 12.00 |
152 6.00 |
13 0.50 |
584 23.00 |
| 22 | 565.0 22.240 |
558.0 21.969 |
305 12.00 |
152 6.00 |
13 0.50 |
641 25.25 |
| 24 | 616.0 24.240 |
609.0 23.969 |
305 12.00 |
152 6.00 |
13 0.50 |
692 27.25 |
Long Stub End Dimensions
| Nominal Pipe Size | Outside Diameter at Bevel | Center to End | |
|---|---|---|---|
| Run, C | Outlet, 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 |
Short Stub End Dimensions
| Nominal Pipe Size | Diameter (G) | Length (J) | Outside Diameter (O.D.) | Approx. Weight (Schedule 5S) | Inside Diameter (I.D.) (Schedule 5S) | Wall Thickness (T) (Schedule 5S) |
|---|---|---|---|---|---|---|
| 1 1/2″ Type C | 2.875 in | 2 in | 1.9 in | 0.29 lbs | 1.77 in | 0.065 in |
| 1 1/4″ Type C | 2.5 in | 2 in | 1.66 in | 0.21 lbs | 1.53 in | 0.065 in |
| 1″ Type C | 2 in | 2 in | 1.315 in | 0.19 lbs | 1.185 in | 0.065 in |
| 1/2″ Type C | 1.375 in | 2 in | 0.84 in | 0.13 lbs | 0.71 in | 0.065 in |
| 10″ Type C | 12.75 in | 5 in | 10.75 in | 7.48 lbs | 10.482 in | 0.134 in |
| 12″ Type C | 15 in | 6 in | 12.75 in | 15 lbs | 12.438 in | 0.156 in |
| 14″ Type C | 16.25 in | 6 in | 14 in | 19.2 lbs | 13.688 in | 0.156 in |
| 16″ Type C | 18.5 in | 6 in | 16 in | 23.9 lbs | 15.67 in | 0.165 in |
| 18″ Type C | 21 in | 6 in | 18 in | 28.5 lbs | 17.67 in | 0.165 in |
| 2 1/2″ Type C | 4.125 in | 2.5 in | 2.875 in | 0.75 lbs | 2.709 in | 0.083 in |
| 2″ Type C | 3.625 in | 2.5 in | 2.375 in | 0.44 lbs | 2.245 in | 0.065 in |
| 20″ Type C | 23 in | 6 in | 20 in | 36.3 lbs | 19.624 in | 0.188 in |
| 24″ Type C | 27.25 in | 6 in | 24 in | 56 lbs | 23.564 in | 0.218 in |
| 3″ Type C | 5 in | 2.5 in | 3.5 in | 0.94 lbs | 3.334 in | 0.083 in |
| 3/4″ Type C | 1.688 in | 2 in | 1.05 in | 0.14 lbs | 0.92 in | 0.065 in |
| 4″ Type C | 6.188 in | 3 in | 4.5 in | 1.38 lbs | 4.334 in | 0.083 in |
| 5″ Type C | 7.313 in | 3 in | 5.563 in | 2.06 lbs | 5.345 in | 0.109 in |
| 6″ Type C | 8.5 in | 3.5 in | 6.625 in | 2.75 lbs | 6.407 in | 0.109 in |
| 8″ Type C | 10.625 in | 4 in | 8.625 in | 3.88 lbs | 8.407 in | 0.109 in |
Stub End Pipe Fittings Standards
These standards define the dimensions, tolerances, materials, and testing requirements to ensure the quality and reliability of Stub End pipe fittings for various industrial applications.
- ASME Standards:
- ASME B16.9: Factory-Made Wrought Buttwelding Fittings.
- ASME B16.25: Buttwelding Ends (preparation of ends for welding).
- ASME Standards: Wrought Steel Buttwelding Short Radius Elbows and Returns.
- ASTM Standards:
- ASTM A234: Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High-Temperature Service.
- ASTM A403: Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings.
- ASTM A815: Standard Specification for Wrought Ferritic, Ferritic/Austenitic (Duplex), and Martensitic Stainless Steel Piping Fittings.
- ASTM A860: Standard Specification for High-Strength Low-Alloy Welded Fittings (commonly used in pipelines with high strength requirements).
- API Standards:
- API 5L: Specification for Line Pipe (not directly for fittings but related to pipe material in oil and gas industries).
- API 6A: Specification for Wellhead and Christmas Tree Equipment (covers piping components but specific to high-pressure environments in oil fields).
- MSS (Manufacturers Standardization Society) Standards:
- MSS SP-43: Wrought and Fabricated Butt-Welding Fittings for Low-Pressure, Corrosion Resistant Applications (commonly used for stainless steel in low-pressure applications).
- MSS SP-75: Specification for High-Strength Wrought, Butt-Welding Fittings (used in oil and gas for high-strength requirements).
- MSS SP-79: Socket-Welding Reducer Inserts.
- MSS SP-83: Carbon Steel Pipe Unions, Socket Welding, and Threaded.
- DIN (Deutsches Institut für Normung) Standards (European):
- DIN 2605: Steel Elbows for Butt Welding (elbows dimensions and tolerances).
- DIN 2615: Tees for Butt Welding.
- DIN 2616: Reducers for Butt Welding.
- DIN 2617: Caps for Butt Welding.
- EN (European Norms) Standards:
- EN 10253-1: Butt-Welding Pipe Fittings Made of Non-Alloy and Alloy Steels.
- EN 10253-2: Butt-Welding Pipe Fittings with Specified Elevated Temperature Properties.
- EN 10253-3: Butt-Welding Pipe Fittings Made of Austenitic and Austenitic-Ferritic (Duplex) Stainless Steel.
- EN 10253-4: Butt-Welding Pipe Fittings for Low-Pressure Applications.
- JIS (Japanese Industrial Standards):
- JIS B2311: Steel Pipe Fittings for Butt-Welding.
- JIS B2312: Cast Iron Pipe Fittings for Butt-Welding.
- JIS B2313: Malleable Iron Pipe Fittings for Butt-Welding.
- ISO (International Standards Organization) Standards:
- ISO 5251: Specifications for Butt-Welding Ends for Steel Pipe Fittings (compatible with ISO pipes and equipment globally).
- ISO 15590: Petroleum and Natural Gas Industries — Induction Bends, Fittings, and Flanges for Pipeline Transportation Systems.
- BS (British Standards):
- BS 1640: Steel Butt-Welding Pipe Fittings for the Petroleum Industry.
- BS 3799: Forged Fittings, Screwed, and Socket-Welding for the Petroleum Industry
Why Ample Alloys for Short Stub End!
Ample Alloys stands out as a trusted name in the manufacturing and supply of Short Stub Ends, offering products that combine precision, durability, and superior performance. Our Short Stub Ends are crafted using high-grade materials, ensuring they can withstand demanding conditions such as high pressure, temperature, and corrosive environments.
Advanced Manufacturing Facilities
Equipped with modern technology, we produce short stub ends that deliver seamless performance and perfect fit in diverse piping systems.
Customization to Your Needs
We offer short stub ends in a variety of materials, sizes, and specifications to suit the unique requirements of your projects.
Timely Delivery Guarantee
With efficient production and logistics management, Ample Alloys ensures your short stub ends are delivered on time, every time.
Cost-Effective Pricing
Our competitive pricing, paired with uncompromised quality, makes us a preferred supplier for short stub ends globally.
- Long Stub Ends provide additional support and are suitable for standard flange connections.
- Short Stub Ends are more compact and used in low-pressure applications or tight spaces.
- Easy alignment with rotating flanges
- Reduced risk of flange-face damage
- Cost-effectiveness in systems requiring frequent maintenance
- Compatibility with a wide range of materials and sizes
Ample Alloys is a leading manufacturer and supplier of Stub Ends, offering high-quality products that adhere to international standards. With a focus on precision, durability, and customer satisfaction, we deliver tailored solutions for diverse industries.
