Industrial Lap Joint Stub Ends – Manufactured in stainless steel, carbon steel, alloy steel & Duplex. Built to ASME B16.9 and DIN 2641/42 standards. Beveled ends, long & short stub end, bulk orders accepted.
We are a prominent manufacturer, supplier, and exporter of Lap Joint Stub Ends, engineered for piping systems that require frequent dismantling and reassembly for inspection, cleaning, or maintenance. These fittings are used alongside lap joint flanges, offering flexibility and ease of alignment during installation. Stub ends are especially advantageous in systems where bolt hole alignment can be challenging, as the flange can rotate freely around the stub end, reducing labor time and ensuring a more efficient fit.
Lap Joint Stub Ends are primarily available in two standard types: the Short Stub End and the Long Stub End. The Short Stub End is manufactured according to MSS-SP-43 and is commonly used with stainless steel pipes in low-pressure applications. It features a shorter hub and is more cost-effective for general use. The Long Stub End, produced as per ASME B16.9, has a longer hub and is preferred for higher pressure or severe service conditions, offering enhanced strength and welding flexibility. We also offer custom stub end lengths to suit specific project or installation needs.
Our stub ends are manufactured using high-quality materials such as Stainless Steel (grades 304, 304L, 316, 316L, 321, 347, 904L), Carbon Steel (ASTM A234 WPB/WPC), Alloy Steel (WP5, WP11, WP22, WP91), and Duplex Steel (S31803, S32205). On request, we also supply Nickel Alloys including Inconel 625, Monel 400, and Hastelloy C276. Available in sizes ranging from ½” to 48” (DN15–DN1200) and wall thicknesses from SCH 5S to SCH XXS, our stub ends comply with international standards such as ASME B16.9, MSS-SP-43, ASTM A403, and A234.
Lap Joint Stub Ends are widely utilized across industries including oil & gas, petrochemical, pharmaceuticals, water treatment, food processing, and marine engineering. Key benefits of using stub ends include easier bolt alignment, reduced flange face damage, lower overall system cost (by allowing use of carbon steel flanges with expensive alloy piping), and flexibility in high-maintenance systems. Precision-engineered with strict quality checks, our stub ends ensure leak-free connections, corrosion resistance, and long-lasting performance even in corrosive or high-pressure environments.
Precision Lap Joint Stub Ends – Long & short, seamless & welded. Sizes from ½” to 48”, SCH 10, 40, 80, 160, and XXS. Materials: SS, CS, Alloy Steel. Ready for bulk export per ASME/MSS standards.
Technical Index
Industrial Stub End Standard Specifications
| Buttweld Lap Joint Stub End Size Availability | 1/2″～24″ NB. (Seamless & 100% X-Ray Welded, Fabricated) |
|---|---|
| Types | Lap Joint Stub End, Long Stub End, Short Stub End |
| Wall Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and others |
| Dimensions | ASME B16.9, MSS-SP-75, ANSI/ASME B16.28 (where applicable) |
| DIN | DIN 2615, DIN 2616, DIN 2617 (where applicable) |
| BS | BS EN 10253, BS 1640 (where applicable) |
| Material Grades | Stainless Steel (SS304, SS316), Carbon Steel (ASTM A234 WPB), Alloy Steel, Duplex, Super Duplex, Inconel |
| Coating / Surface Treatment | Black Paint, Anti-rust Coating, Galvanized (Hot/Cold Dip), Pickled, Passivated |
| Ends | Beveled (BW) Ends as per ASME B16.25, Plain Ends, Flanged (on request) |
| Tolerance | As per ASME B16.9 / customer specification |
| Testing | PMI, Hydro Test, UT, RT, Visual, Dimensional Inspection, Hardness Test (on request) |
| Certification | EN 10204 3.1 / 3.2, ISO 9001:2015, PED Certified (on request) |
| Material Sourcing Regions | India, Japan, USA, Europe, South Korea |
| Global Export Markets | UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, USA, Canada, Singapore, Malaysia, Nigeria, Egypt, South Africa, Kenya, Turkey, Kazakhstan, Indonesia, Brazil, Australia |
Industrial Buttweld Long Stub End Standards
| ANSI/ASME B16.9 – Factory-Made Wrought Steel Buttwelding Fittings | ANSI/ASME B16.28 – Wrought Steel Short Radius Elbows and Returns | ANSI/ASME B16.25 – Buttwelding Ends(beval standards) | MSS SP-43 – Wrought and fabricated Butt welding Fittings for Light Wall Applications |
| MSS SP-75 – High Test Wrought Butt welding Fittings | DIN 2616 – Butt welding Pipe Fittings: Reducers | DIN 2617 – Butt welding Pipe Fittings: Caps | DIN28011 – Dished Ends(used in pressure vessels) |
| EN10253-1 Butt-welding Pipe Fittings(Non Alloy Steels) | EN10253-2 Butt-welding Pipe Fittings(Stainless/Alloy Steels) |
Buttweld Lap Joint Stub End Material Grades and Standards
| Stainless Steel Lap Joint Stub End | ASTM A403 WP304/304L, WP316/316L, ASTM A774(Welded):DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404 |
|---|---|
| Duplex Steel Lap Joint Stub End | ASTM A 815 / ASME SA 815 UNS S31803, S32205. Werkstoff No. 1.4462 |
| Super Duplex Steel Lap Joint Stub End | ASTM A 815 / ASME SA 815 UNS S32750, S32950. Werkstoff No. 1.4410 |
| Carbon Steel Lap Joint Stub End | ASTM A234 / ASME SA234 WPB , WPBW, ASTM A860 WPHY 42, 46, 52, 60, 65, 70. |
| Alloy Steel Lap Joint Stub End | ASTM A234 / ASME SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91 |
| High Nickel Alloy Lap Joint Stub End | ASTM B336, ASME SB336, Nickel 200 (UNS No. No2200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, CuNi30Mn1Fe. |
| Other Specialty Lap Joint Stub End | Materials: Tin Bronze, Aluminum Bronze, Lead Bronze, Nimonic 75, Nimonic 80A, Nimonic 90, AISI 4140, AISI 4130, Mild Steel, Al6XN |
ASME B16.9 Buttweld Fittings Types
Butt weld Lap Joint Stub End Industries & Applications
Buttweld Long Stub End Dimensional Tolerance
| Product | Nom. Pipe Size | Dia (G) | Length (F), Short | Outside Dia (O.D.) | Sch 160, Inside Dia (I.D.) | Sch 160, Lap Thickness (t) | Schedule 160, Wall Thickness (T) | XX Strong Wall Approx. Weight | XX Strong Wall, Inside Dia (I.D.) |
|---|---|---|---|---|---|---|---|---|---|
| 1 1/2″ Stubs Ends Long Type “A | 1.5 | 2.875 | 2 | 1.9 | 1.338 | 0.281 | 0.281 | 2.98 | 1.1 |
| 1 1/2″ Stubs Ends Long Type “A” | 1.5 | 2.875 | 4 | 1.9 | 0.15 | 0.15 | 1.49 | 1.5 | 0.2 |
| 1 1/4″ Stubs Ends Long Type “A | 1.25 | 2.5 | 2 | 1.66 | 1.16 | 0.25 | 0.25 | 2.52 | 0.896 |
| 1 1/4″ Stubs Ends Long Types “A” | 1.25 | 2.5 | 4 | 1.66 | 0.14 | 0.14 | 1.26 | 1.278 | 0.191 |
| 1″ Stubs Ends Long Types “A | 1 | 2 | 2 | 1.315 | 0.815 | 0.25 | 0.25 | 1.76 | 0.599 |
| 1″ Stubs Ends Long Types “A” | 1 | 2 | 4 | 1.315 | 0.133 | 0.133 | 0.88 | 0.957 | 0.179 |
| 1/2″ Stubs Ends Long Types “A | 0.5 | 1.375 | 2 | 0.84 | 0.464 | 0.187 | 0.188 | 0.68 | 0.252 |
| 1/2″ Stubs Ends Long Types “A” | 0.5 | 1.375 | 3 | 0.84 | 0.109 | 0.109 | 0.34 | 0.546 | 0.147 |
| 10″ Stubs Ends Long Types “A | 10 | 12.75 | 5 | 10.75 | 8.5 | 1.125 | 1.125 | – | – |
| 10″ Stubs Ends Long Types “A” | 10 | 12.75 | 10 | 10.75 | 0.365 | 0.365 | 54 | 9.75 | 0.5 |
| 12″ Stubs Ends Long Types “A | 12 | 15 | 6 | 12.75 | 10.126 | 1.312 | 1.312 | – | – |
| 12″ Stubs Ends Long Types “A” | 12 | 15 | 10 | 12.75 | 0.375 | 0.375 | 64.5 | 11.75 | 0.5 |
| 14″ Stubs Ends Long Types “A” | 14 | 16.25 | 12 | 14 | 0.375 | 0.375 | 84 | 13 | 0.5 |
| 16″ Stubs Ends Long Types “A” | 16 | 18.5 | 12 | 16 | 0.375 | 0.375 | 98 | 15 | 0.5 |
| 18″ Stubs Ends Long Types “A” | 18 | 21 | 12 | 18 | 0.375 | 0.375 | 136 | 17 | 0.5 |
| 2 1/2″ Stubs Ends Long Types “A | 2.5 | 4.125 | 2.5 | 2.875 | 2.125 | 0.375 | 0.375 | 8.8 | 1.771 |
| 2 1/2″ Stubs Ends Long Types “A” | 2.5 | 4.125 | 6 | 2.875 | 0.203 | 0.203 | 4.4 | 2.323 | 0.276 |
| 2″ Stubs Ends Long Types “A | 2 | 3.625 | 2.5 | 2.375 | 1.689 | 0.343 | 0.343 | 6.1 | 1.503 |
| 2″ Stubs Ends Long Types “A” | 2 | 3.625 | 6 | 2.375 | 0.154 | 0.154 | 3.05 | 1.939 | 0.218 |
| 20″ Stubs Ends Long Types “A” | 20 | 23 | 12 | 20 | 0.375 | 0.375 | 157 | 19 | 0.5 |
| 3 1/2″ Stubs Ends Long Types “A | 3.5 | 5.5 | 3 | 4 | – | – | – | 15.5 | 2.728 |
| 3 1/2″ Stubs Ends Long Types “A” | 3.5 | 5.5 | 6 | 4 | 0.226 | 0.226 | 7.75 | 3.364 | 0.318 |
| 3″ Stubs Ends Long Types “A | 3 | 5 | 2.5 | 3.5 | 2.624 | 0.438 | 0.438 | 9.8 | 2.3 |
| 3″ Stubs Ends Long Types “A” | 3 | 5 | 6 | 3.5 | 0.216 | 0.216 | 6.5 | 2.9 | 0.3 |
| 3/4″ Stubs Ends Long Types “A | 0.75 | 1.688 | 2 | 1.05 | 0.612 | 0.218 | 0.219 | 0.94 | 0.434 |
| 3/4″ Stubs Ends Long Types “A” | 0.75 | 1.688 | 3 | 1.05 | 0.113 | 0.113 | 0.47 | 0.742 | 0.154 |
| 4″ Stubs Ends Long Types “A | 4 | 6.188 | 3 | 4.5 | 3.438 | 0.531 | 0.531 | 19.3 | 3.152 |
| 4″ Stubs Ends Long Types “A” | 4 | 6.188 | 6 | 4.5 | 0.237 | 0.237 | 9.65 | 3.826 | 0.337 |
| 5″ Stubs Ends Long Types “A | 5 | 7.313 | 3 | 5.563 | 4.313 | 0.625 | 0.625 | 32.66 | 4.063 |
| 5″ Stubs Ends Long Types “A” | 5 | 7.313 | 8 | 5.563 | 0.258 | 0.258 | 16.33 | 4.813 | 0.375 |
| 6″ Stubs Ends Long Types “A | 6 | 8.5 | 3.5 | 6.625 | 5.187 | 0.718 | 0.719 | 45.26 | 4.897 |
| 6″ Stubs Ends Long Types “A” | 6 | 8.5 | 8 | 6.625 | 0.28 | 0.28 | 22.63 | 5.761 | 0.432 |
| 8″ Stubs Ends Long Types “A | 8 | 10.625 | 4 | 8.625 | 6.813 | 0.906 | 0.906 | 59.71 | 6.875 |
| 8″ Stubs Ends Long Types “A” | 8 | 10.625 | 8 | 8.625 | 0.322 | 0.322 | 34.12 | 7.625 | 0.5 |
Short Stub Ends Dimensions
| Product | Nom. Pipe Size | Diameter (G) | Length (J) | Outside Diameter (O.D.) | Schedule 5S Approx. Weight | Schedule 5S, Inside Diameter (I.D.) | Schedule 5S, Wall Thickness (T) |
|---|---|---|---|---|---|---|---|
| 1 1/2″ Short Stubs Ends Short Type “C” | 1.5 | 2.875 | 2 | 1.9 | 0.29 | 1.77 | 0.065 |
| 1 1/4″ Short Stubs Ends Short Type “C” | 1.25 | 2.5 | 2 | 1.66 | 0.21 | 1.53 | 0.065 |
| 1″ Short Stubs Ends Short Type “C” | 1 | 2 | 2 | 1.315 | 0.19 | 1.185 | 0.065 |
| 1/2″ Short Stubs Ends Short Type “C” | 0.5 | 1.375 | 2 | 0.84 | 0.13 | 0.71 | 0.065 |
| 10″ Short Stubs Ends Short Type “C” | 10 | 12.75 | 5 | 10.75 | 7.48 | 10.482 | 0.134 |
| 12″ Short Stubs Ends Short Type “C” | 12 | 15 | 6 | 12.75 | 15 | 12.438 | 0.156 |
| 14″ Short Stubs Ends Short Type “C” | 14 | 16.25 | 6 | 14 | 19.2 | 13.688 | 0.156 |
| 16″ Short Stubs Ends Short Type “C” | 16 | 18.5 | 6 | 16 | 23.9 | 15.67 | 0.165 |
| 18″ Short Stubs Ends Short Type “C” | 18 | 21 | 6 | 18 | 28.5 | 17.67 | 0.165 |
| 2 1/2″ Short Stubs Ends Short Type “C” | 2.5 | 4.125 | 2.5 | 2.875 | 0.75 | 2.709 | 0.083 |
| 2″ Short Stubs Ends Short Type “C” | 2 | 3.625 | 2.5 | 2.375 | 0.44 | 2.245 | 0.065 |
| 20″ Short Stubs Ends Short Type “C” | 20 | 23 | 6 | 20 | 36.3 | 19.624 | 0.188 |
| 24″ Short Stubs Ends Short Type “C” | 24 | 27.25 | 6 | 24 | 56 | 23.564 | 0.218 |
| 3″ Short Stubs Ends Short Type “C” | 3 | 5 | 2.5 | 3.5 | 0.94 | 3.334 | 0.083 |
| 3/4″ Short Stubs Ends Short Type “C” | 0.75 | 1.688 | 2 | 1.05 | 0.14 | 0.92 | 0.065 |
| 4″ Short Stubs Ends Short Type “C” | 4 | 6.188 | 3 | 4.5 | 1.38 | 4.334 | 0.083 |
| 5″ Short Stubs Ends Short Type “C” | 5 | 7.313 | 3 | 5.563 | 2.06 | 5.345 | 0.109 |
| 6″ Short Stubs Ends Short Type “C” | 6 | 8.5 | 3.5 | 6.625 | 2.75 | 6.407 | 0.109 |
| 8″ Short Stubs Ends Short Type “C” | 8 | 10.625 | 4 | 8.625 | 3.88 | 8.407 | 0.109 |
ASME B16.9 Buttweld Lap Joint Stub End Weight Chart
| NPS inchess |
LAP JOINT STUB ENDS | |||
|---|---|---|---|---|
| Sch. 5S |
Sch. 10S |
Sch. 40S |
Sch. 80S |
|
| 1/2 | 0.06 | 0.08 | 0.12 | 0.13 |
| 3/4 | 0.07 | 0.09 | 0.15 | 0.17 |
| 1 | 0.09 | 0.15 | 0.20 | 0.25 |
| 1 1/4 | 0.13 | 0.20 | 0.30 | 0.35 |
| 1 1/2 | 0.16 | 0.25 | 0.38 | 0.46 |
| 2 | 0.25 | 0.40 | 0.55 | 0.75 |
| 2 1/2 | 0.35 | 0.50 | 0.80 | 1.00 |
| 3 | 0.50 | 0.60 | 1.10 | 1.50 |
| 4 | 0.70 | 1.00 | 1.80 | 2.50 |
| 5 | 1.00 | 1.25 | 2.50 | 3.50 |
| 6 | 1.60 | 1.95 | 3.70 | 5.50 |
| 8 | 2.50 | 3.10 | 5.90 | 10.0 |
| 10 | 4.00 | 4.90 | 10.5 | 14.0 |
| 12 | 6.60 | 7.10 | 15.0 | 20.0 |
| 14 | 6.40 | 7.80 | 15.5 | 20.5 |
| 16 | 7.90 | 9.00 | 18.0 | 24.0 |
| 18 | 9.30 | 10.5 | 21.0 | 28.0 |
| 20 | 12.0 | 13.5 | 23.5 | 31.0 |
| 24 | 16.5 | 19.0 | 28.5 | 38.0 |
| Approximate weights in kg, density 8 kg/dm3 | ||||
Major Industrial Buttweld Lap Joint Stub End Export Countries
United Arab Emirates (UAE), Jordan, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United States of America (USA), Singapore, Malaysia, Azerbaijan, Armenia, Georgia, Egypt, Algeria, Nigeria, South Africa, Kenya, Morocco, Ethiopia, Ghana, Tanzania, Sudan, Uganda, Angola.