Lap Joint Stub End Fittings Manufacturer in India
Lap Joint Stub End Fittings Manufacturer in India
Sachiya Steel International is a trusted Long Stub End Fittings Manufacturer in India, established in 2005 and headquartered in Mumbai, India. With over 20+ years of industry experience, we manufacture, supply, and export high-quality long stub end fittings for industrial piping applications. Our products are available in various sizes, dimensions, and material grades, including stainless steel, carbon steel, alloy steel, duplex steel, super duplex steel, and nickel alloys to meet diverse industrial requirements.
We follow applicable ASTM, ASME, ANSI, DIN, and MSS standards, with ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications supporting our commitment to quality and reliability. Serving oil and gas, petrochemical, chemical, marine, and power generation industries, we provide material traceability, inspection, testing, and documentation as required. With exports to over 85+ countries, we focus on competitive pricing, dependable product quality, and timely worldwide delivery.
What Are Lap Joint Stub End Fittings?
Lap joint stub end fittings are butt weld pipe fittings designed for use with lap joint flanges. They feature a plain end that is welded to the pipe and a flared end, known as the lap, that provides a bearing surface for the gasket at the flange connection. A loose backing flange slides over the stub end and bolts to the mating flange, allowing the flange to rotate freely without turning the pipe.
A typical lap joint connection consists of four components: the stub end, backing flange, gasket, and mating flange. This design simplifies bolt-hole alignment, installation, and maintenance, making it suitable for piping systems that require frequent inspection or dismantling. These fittings are available in various sizes, wall thicknesses, and material grades, including stainless steel, carbon steel, alloy steel, duplex steel, and nickel alloys. Depending on the applicable specifications, stub ends may conform to MSS SP-43 or ASME B16.9, while relevant flanges follow ASME B16.5. Material selection and pressure ratings depend on the fitting specifications, piping design, and operating conditions.
Lap Joint Stub End Fittings
Lap Joint Stub End Fittings are available in sizes from 1/2" to 48" and grades such as ASTM A234 WPB, WP5, WP9, WP11, WP22, and WP91. Designed for use with lap joint flanges, these fittings simplify alignment and disassembly in oil and gas, petrochemical, refinery, and industrial piping systems.
Lap Joint Stub End Fittings Types We Supply
We supply different types of lap joint stub end fittings to meet various industrial piping requirements. As an experienced manufacturer, we offer a range of designs, patterns, and manufacturing options to suit different flange connections, pipe sizes, and project specifications.
- Type A Lap Joint Stub End: Features a corner radius designed to match the bore of a standard lap joint flange.
- Type B Lap Joint Stub End: Has a smaller corner radius and is designed for use with slip-on flanges as backing flanges.
- Type C Lap Joint Stub End: Features a formed lap and can be used with compatible lap joint or slip-on backing flanges, depending on the design.
- Long Pattern Lap Joint Stub End: Has a longer barrel that provides additional length for pipe welding and flange placement.
- Short Pattern Lap Joint Stub End: Features a compact barrel for piping systems with limited installation space, where the applicable specifications permit its use.
- Seamless Lap Joint Stub End: Manufactured without a longitudinal weld seam to meet specific material and service requirements.
- Welded Lap Joint Stub End: Manufactured using welded pipe or plate, with inspection and testing based on the required specifications.
Our lap joint stub end fittings are available in different sizes, wall thicknesses, and material grades, including stainless steel, carbon steel, alloy steel, duplex steel, and nickel alloys, subject to availability. We help customers select suitable fittings based on flange compatibility, piping design, operating conditions, and applicable industry standards.
Why Choose Lap Joint Stub End Fittings?
Lap joint stub end fittings are a practical choice for industrial piping systems that require easy installation, maintenance, and flange alignment. Their design allows the backing flange to rotate freely around the pipe, making it easier to align bolt holes during assembly. Key benefits include:
- Easy Flange Alignment: The loose backing flange rotates freely, helping workers align bolt holes without turning the pipe.
- Simple Maintenance: Workers can disconnect and reassemble the flange connection more easily during inspections or repairs.
- Cost-Effective Design: The backing flange can use a more economical material when the piping design and service conditions allow it.
- Corrosion Resistance: Stainless steel and suitable alloy options help handle corrosive environments when selected for the application.
- Flexible Material Options: Available material grades support a wide range of industrial piping requirements.
- Wide Industrial Applications: These fittings serve oil and gas, chemical processing, petrochemical, marine, and power generation industries.
Choosing the right lap joint stub end fitting helps improve installation efficiency and supports reliable piping performance. Always select the material, size, and pressure rating according to the operating conditions and applicable project specifications.
Types of Stub Ends Fittings
Explore our range of industrial stub end fittings, including short stub ends, long stub ends, Type A, Type B and Type C stub ends, lap joint stub ends and MSS type stub ends for diverse piping applications.
Short Stub End Fittings
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Long Stub End Fittings
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Type A Stub End Fittings
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Type B Stub End Fittings
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Type C Stub End Fittings
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Lap Joint Stub End Fittings
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MSS Type Stub End Fittings
→Get Certified Lap Joint Stub End Fittings at Competitive Factory Prices
Lap Joint Stub End Fittings Specifications
| Property | Specification |
|---|---|
| Product Name | Lap Joint Stub End Fittings |
| Types | Type A, Type B, Type C, long pattern, short pattern, seamless, welded, heavy wall |
| Size Range | 1/2" to 24" NB |
| Pattern | Long pattern (ASME B16.9), short pattern (MSS SP-43) |
| Wall Thickness | Sch 5S, 10S, 10, 20, 30, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS |
| Materials | Carbon steel, low temperature carbon steel, alloy steel, stainless steel, duplex, super duplex, nickel alloys |
| Dimension Standards | MSS SP-43, ASME B16.9 |
| Mating Flange | Lap joint flange or slip-on flange used as a backing flange, to ASME B16.5 |
| Material Standards | ASTM A403, A234, A420, A815, B366 |
| End Type | Bevel end per ASME B16.25 |
| Lap Face | Machined, serrated (Type A and B), smooth flared (Type C) |
| Construction | Seamless and welded |
| Surface Finish | Pickled and passivated, sand blasted, polished, black, oil coated |
| Heat Treatment | Normalising, stress relieving, solution annealing |
| Testing | PMI, hardness, dimensional, hydrostatic, NDT |
| Certification | EN 10204 3.1, 3.2 on request |
| How to Order | Size, type, pattern, schedule, grade and standard (for example: Lap Joint Stub End 6", Type A, Long Pattern, Sch 40, A234 WPB, ASME B16.9) |
| Custom Work | Special lengths, lap diameters, lap thicknesses and grades |
Lap Joint Stub End Fittings Chemical Composition
Values are in %, maximum unless a range is shown.
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| A403 WP304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–11.0 | – |
| A403 WP304L | 0.035 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–13.0 | – |
| A403 WP316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| A403 WP316L | 0.035 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 |
| A403 WP321 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 17.0–19.0 | 9.0–12.0 | – |
| A234 WPB | 0.30 | 0.29–1.06 | 0.10 min | 0.050 | 0.058 | 0.40 | 0.40 | 0.15 |
| A815 UNS S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 |
WP321 holds titanium at 5 times the carbon content (minimum). Duplex S31803 holds 0.08–0.20% nitrogen.
Lap Joint Stub End Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| A403 WP304 / WP316 / WP321 | 515 min | 205 min | 28 min |
| A403 WP304L / WP316L | 485 min | 170 min | 28 min |
| A234 WPB | 415–585 | 240 min | 22 min |
| A420 WPL6 | 415–585 | 240 min | 22 min |
| A234 WP22 Class 1 | 415–585 | 205 min | 22 min |
| A815 UNS S31803 | 620 min | 450 min | 25 min |
Lap Joint Stub End Fittings Size Chart
| NB | Inch | Pipe OD (mm) | Where This Lap Joint Stub End Size Goes |
|---|---|---|---|
| 15 | 1/2" | 21.3 | Instrument and sample line flange joints |
| 25 | 1" | 33.4 | Dosing and utility line flange joints |
| 50 | 2" | 60.3 | Cooling water and process flange joints |
| 80 | 3" | 88.9 | Dairy, brewery and chemical transfer joints |
| 100 | 4" | 114.3 | Pump and heat exchanger nozzle joints |
| 150 | 6" | 168.3 | Process header and spool flange joints |
| 200 | 8" | 219.1 | Main process line flange joints |
| 300 | 12" | 323.9 | Transfer line and cooling circuit joints |
| 400 | 16" | 406.4 | Plant main and large spool joints |
| 600 | 24" | 609.6 | Large header and low-pressure pipeline joints |
Lap Joint Stub End Fittings Dimension Chart (ASME B16.9 and MSS SP-43)
G is the diameter of the lap, R is the radius of the fillet at the lap, and F is the length from the face of the lap to the bevelled end, in both the long and short pattern. The barrel outside diameter is shown as a maximum and minimum. All dimensions are in mm.
| NPS | Barrel OD (Max / Min) | Lap Diameter (G) | Fillet Radius (R) | Long Pattern (F) | Short Pattern (F) |
|---|---|---|---|---|---|
| 1/2" | 22.8 / 20.5 | 35 | 3 | 76 | 51 |
| 1" | 35.0 / 32.6 | 51 | 3 | 102 | 51 |
| 1 1/2" | 49.9 / 47.5 | 73 | 6 | 102 | 51 |
| 2" | 62.4 / 59.5 | 92 | 8 | 152 | 64 |
| 3" | 91.3 / 88.1 | 127 | 10 | 152 | 64 |
| 4" | 116.7 / 113.5 | 157 | 11 | 152 | 76 |
| 5" | 144.3 / 140.5 | 186 | 11 | 203 | 76 |
| 6" | 171.3 / 167.5 | 216 | 13 | 203 | 89 |
| 8" | 222.1 / 218.3 | 270 | 13 | 203 | 102 |
| 10" | 277.2 / 272.3 | 324 | 13 | 254 | 127 |
| 12" | 328.0 / 323.1 | 381 | 13 | 254 | 152 |
| 14" | 359.9 / 354.8 | 413 | 13 | 305 | 152 |
| 16" | 411.0 / 405.6 | 470 | 13 | 305 | 152 |
| 18" | 462.0 / 456.0 | 533 | 13 | 305 | 152 |
| 20" | 514.0 / 507.0 | 584 | 13 | 305 | 152 |
| 24" | 616.0 / 609.0 | 692 | 13 | 305 | 152 |
Wall thickness follows the schedule of the connecting pipe. Where special facings such as tongue and groove are used, extra lap thickness is added on top of the basic length. For other sizes, lengths and lap diameters, we cut the stub end to your drawing.
Lap Joint Stub End Fittings Grades We Supply
As a trusted Lap Joint Stub End Fittings Supplier, we offer a wide range of material grades to meet different industrial piping requirements. Our products are available in stainless steel, carbon steel, alloy steel, duplex steel, super duplex steel, and nickel alloys to suit various operating conditions and applications.
- Stainless Steel Grades: SS 304, 304L, 310, 310S, 316, 316L, 317L, 321, 347, and 904L
- Carbon Steel Grades: ASTM A234 WPB
- Alloy Steel Grades: ASTM A234 WP11, WP22, and WP91
- Duplex Steel Grades: UNS S31803 and S32205
- Super Duplex Steel Grades: UNS S32750 and S32760
- Nickel Alloy Grades: Inconel 625, Monel 400, Incoloy 825, and Hastelloy C276
We supply lap joint stub end fittings for oil and gas, chemical processing, petrochemical, marine, and power generation industries. Our team helps customers select suitable material grades based on corrosion resistance, temperature, pressure, and project specifications. All grades are subject to availability and applicable product requirements.
Lap Joint Stub End Fittings Standards and Certifications
We manufacture and supply lap joint stub end fittings according to applicable industry standards to meet different industrial piping requirements. As a reliable Lap Joint Stub End Fittings Supplier in India, we offer products to relevant standards, including MSS SP-43 and ASME B16.9, with compatible lap joint or slip-on flanges designed to ASME B16.5. Our fittings are available in various material grades that meet applicable specifications, such as ASTM A403 for stainless steel, ASTM A234 for carbon and alloy steel, ASTM A420 for low-temperature steel, ASTM A815 for duplex steel, and ASTM B366 for nickel alloys. Weld end preparation follows ASME B16.25 where specified.
Our quality process includes material traceability, dimensional checks, and inspection reports based on project requirements. We can provide EN 10204 3.1 material test certificates, chemical composition and mechanical test reports, and positive material identification (PMI) reports. EN 10204 3.2 certification, third-party inspections, intergranular corrosion testing, and other applicable compliance documentation can also be arranged when required. These measures help customers verify material quality and ensure that supplied fittings meet their specified technical and project requirements.
Lap Joint Stub End Fittings Applications
- Chemical Processing: Lap joint stub end fittings in stainless steel or alloy steel pair with carbon steel backing flanges on acid and solvent lines.
- Pharmaceutical and Food Plants: Rotating flanges give easy-to-open joints for cleaning and inspection on hygienic lines.
- Dairy, Brewery and Beverage Plants: Stainless steel stub ends pair with backing flanges on process and utility lines that crews open often.
- Water Treatment and Desalination: Duplex and 316L stub ends carry brine and treated water with lower-cost backing flanges.
- Pump and Heat Exchanger Connections: The loose flange helps line up bolt holes at equipment nozzles.
- Pipe Spool Fabrication: Fabricators weld stub ends onto spools in the shop, and crews bolt them up on site, and many projects source them from a lap joint stub end fittings supplier in India like us.
- Maintenance and Repair Work: Teams use lap joint connections to repair or extend lines where flange alignment is hard to achieve.
- Oil and Gas Facilities: Stub ends join low-pressure and moderate-pressure utility, cooling and process lines on skids and plants.
- Power Plants: Lap joint stub ends serve cooling water and auxiliary lines.
- Shipbuilding and Offshore: Stub ends join seawater cooling and fire fighting lines on vessels and platforms.
Why Choose Us as Your Lap Joint Stub End Fittings Manufacturer in India?
With over two decades of experience since 2005, we understand what buyers expect from a reliable Lap Joint Stub End Fittings Manufacturer in India. We focus on product quality, accurate dimensions, competitive pricing, and timely delivery to meet different industrial requirements. We support standard orders, bulk purchases, and project-specific needs for customers across various industries.
We offer lap joint stub end fittings in a wide range of sizes, dimensions, and material grades, including stainless steel, carbon steel, alloy steel, duplex steel, super duplex steel, and nickel alloys. Our available grades include SS 304, 304L, 316, 316L, 904L, ASTM A234 WPB, WP11, WP22, WP91, UNS S31803, S32205, S32750, S32760, Inconel 625, Monel 400, Incoloy 825, and Hastelloy C276, subject to availability. We follow applicable industry standards and provide material test certificates and inspection documents as required.
With the capacity to manufacture and export up to 100 tonnes of products per month, we handle bulk orders and ongoing supply requirements efficiently. We export to customers in 85+ countries and focus on reliable service, consistent quality, and timely worldwide delivery. Whether you need standard fittings or customized solutions, we work to meet your technical specifications and project deadlines.
Countries We Export To
We export lap joint stub end fittings to customers in over 85+ countries worldwide. Our export network serves industries such as oil and gas, petrochemical, chemical processing, marine, and power generation. We supply products according to customer specifications and project requirements across major international markets.
- North America: USA, Canada, Mexico
- Europe: United Kingdom, Germany, France, Italy, Netherlands, Spain
- Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain
- Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia
- Africa: South Africa, Nigeria, Egypt, Kenya
- South America: Brazil, Chile, Peru
We support international orders with suitable export packaging, shipping documentation, and material test certificates as required. We can also arrange third-party inspections and additional quality documents based on project specifications. Our focus remains on reliable product quality, smooth order coordination, and timely delivery to customers worldwide.