Type A Stub End Fittings Manufacturer in India
Type A Stub End Fittings Manufacturer in India
Sachiya Steel International is a Mumbai-based Type A Stub End Fittings Manufacturer in India, established in 2005 with over 20 years of experience in the steel fittings industry. We manufacture, supply, and export Type A stub ends for piping systems that use lap joint flanges, serving oil and gas, petrochemical, chemical processing, marine, and power generation industries. Our export network reaches 85+ countries, supporting industrial projects with standard and customised fitting requirements.
We offer Type A stub end fittings in sizes from 1/2 inch to 48 inches, subject to specifications, and in carbon steel, stainless steel, alloy steel, duplex, super duplex, and nickel alloy grades. Available materials include ASTM A234 WPB, ASTM A403 WP304/316, and ASTM A815 UNS S31803/S32205, depending on requirements. Our quality systems are supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications. We focus on dimensional accuracy, material traceability, competitive pricing, and reliable delivery for industrial piping applications.
What Are Type A Stub End Fittings?
Type A stub end fittings are butt weld stub ends made for use with standard lap joint flanges. One end is bevelled and welded to the pipe, and the other end carries the lap, a flared collar that forms the sealing face. The lap thickness is equal to or greater than the nominal wall of the connecting pipe, and the outside corner of the lap carries a radius that fits the radiused bore of a lap joint flange. The inside corner stays square, and the lap face is usually machined with a serrated finish to help hold a gasket.
MSS SP-43 defines the lap types. Type A suits lap joint flanges, Type B has a very small corner radius for slip-on flanges used as backing flanges, and Type C is a short, flared collar that can fit either flange type. In everyday supply, Type A is the default when an order does not state the type. The required wall thickness, material grade and pressure capacity depend on the fitting specifications, piping design and operating conditions.
Type A Stub End Fittings
Type A 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 lap joint flange assemblies, these fittings support piping systems in oil and gas, petrochemical, refinery, and power generation industries.
Type A Stub End Fittings Types We Supply
As a Type A stub end fittings manufacturer, we supply fittings designed for use with compatible lap joint flanges in industrial piping systems. Type A stub ends have a relatively thick lap that supports the flange connection, making them suitable for many standard piping applications. We offer different material options and dimensions to meet the requirements of process plants, refineries, chemical facilities, and other industrial projects.
- Carbon Steel Type A Stub Ends: Used in general industrial piping and fluid transport systems.
- Stainless Steel Type A Stub Ends: Suitable for applications requiring corrosion resistance.
- Alloy Steel Type A Stub Ends: Selected for specific strength and temperature requirements.
- Duplex and Super Duplex Type A Stub Ends: Used in demanding environments where greater corrosion resistance is needed.
- Nickel Alloy Type A Stub Ends: Available for specialised applications involving challenging service conditions.
We supply Type A stub end fittings in different sizes, wall thicknesses, and material grades according to applicable standards and project specifications.
Why Choose Type A Stub End Fittings?
Type A stub end fittings are a suitable choice for piping systems that use lap joint flanges and require easier assembly and maintenance. Their design allows the backing flange to rotate freely, helping installers align bolt holes without turning the connected pipe. This feature is useful in industrial systems where regular inspection, dismantling, or component replacement may be necessary.
- Simple Installation: The rotating backing flange makes bolt alignment easier during assembly.
- Convenient Maintenance: The connection can be dismantled when inspection or repairs are needed.
- Flexible Material Selection: Available in different metals to suit the fluid and operating environment.
- Flange Compatibility: Designed for use with compatible lap joint flanges in specified piping arrangements.
- Multiple Size Options: Different dimensions help meet project-specific connection requirements.
- Industrial Versatility: Used in refineries, chemical plants, oil and gas facilities, and other process industries.
Selecting the correct Type A stub end, material grade, and flange combination helps achieve a suitable connection for the intended operating conditions. Always check dimensional compatibility and applicable piping specifications before selection.
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 Type A Stub End Fittings at Competitive Factory Prices
Type A Stub End Fittings Specifications
| Property | Specification |
|---|---|
| Product Name | Type A Stub End Fittings (Lap Joint Stub Ends) |
| Types | Long pattern, short pattern, seamless, welded, heavy wall, serrated face |
| Size Range | 1/2" to 24" NB |
| Lap Type | Type A (outside corner radius, square inside corner) |
| Lap Thickness | Equal to or greater than the nominal wall of the connecting pipe |
| 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 to ASME B16.5 |
| Material Standards | ASTM A403, A234, A420, A815, B366 |
| End Type | Bevel end per ASME B16.25 |
| Lap Face | Machined, serrated finish |
| 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: Type A Stub End 3", Short Pattern, Sch 10S, A403 WP316L, MSS SP-43) |
| Custom Work | Special lengths, lap thicknesses, lap diameters and grades |
Type A 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.
Type A 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 |
Type A Stub End Fittings Size Chart
| NB | Inch | Pipe OD (mm) | Where This Type A 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 | Fire water and chemical transfer flange 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 pipeline flange joints |
Type A Stub End Fittings Dimension Chart (MSS SP-43 and ASME B16.9)
T is the minimum lap thickness for Schedule 10S pipe, G is the diameter of the lap, F is the length from the face of the lap to the bevelled end, and R is the radius of the outside corner of the lap. The radius for Type B is shown for comparison. All dimensions are in mm.
| NPS | Pipe OD | Lap Thickness (T) | Lap Diameter (G) | Short Pattern Length (F) | Long Pattern Length (F) | Type A Radius (R) | Type B Radius (R) |
|---|---|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 34.9 | 50.8 | 76 | 3.05 | 0.76 |
| 3/4" | 26.7 | 2.11 | 42.9 | 50.8 | 76 | 3.05 | 0.76 |
| 1" | 33.4 | 2.77 | 50.8 | 50.8 | 102 | 3.05 | 0.76 |
| 1 1/4" | 42.2 | 2.77 | 63.5 | 50.8 | 102 | 4.83 | 0.76 |
| 1 1/2" | 48.3 | 2.77 | 73.0 | 50.8 | 102 | 6.35 | 0.76 |
| 2" | 60.3 | 2.77 | 92.1 | 63.5 | 152 | 7.87 | 0.76 |
| 2 1/2" | 73.0 | 3.05 | 104.8 | 63.5 | 152 | 7.87 | 0.76 |
| 3" | 88.9 | 3.05 | 127.0 | 63.5 | 152 | 9.65 | 0.76 |
| 3 1/2" | 101.6 | 3.05 | 139.7 | 76.2 | 152 | 9.65 | 0.76 |
| 4" | 114.3 | 3.05 | 157.2 | 76.2 | 152 | 11.18 | 0.76 |
For sizes from 5" to 24", the lap diameter, radius and length follow the ASME B16.9 table, with a fillet radius of 11 mm on 5" and 13 mm from 6" up. 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.
Type A Stub End Fittings Grades We Supply
Material selection plays an important role in the service life and performance of Type A stub end fittings. Different operating environments call for different levels of strength, temperature resistance, and protection against corrosion. As a Type A stub end fittings supplier, we offer a broad selection of grades for industrial piping projects, with availability based on specifications and requirements.
- Carbon Steel: ASTM A234 WPB, suitable for general industrial piping.
- Low-Temperature Steel: ASTM A420 WPL6, designed for specified low-temperature service.
- Alloy Steel: ASTM A234 WP11, WP22, and WP91 for applicable elevated-temperature applications.
- Stainless Steel: ASTM A403 WP304, WP304L, WP316, WP316L, WP321, and WP347.
- Duplex Steel: ASTM A815 UNS S31803 and S32205 for applications requiring enhanced corrosion resistance.
- Super Duplex Steel: UNS S32750 and S32760 for demanding corrosive environments.
- Nickel Alloys: Inconel 625, Monel 400, Incoloy 825, and Hastelloy C276 for specialised service conditions.
We supply Type A stub end fittings in different sizes and wall thicknesses, with material testing and documentation arranged according to applicable standards and project requirements. The final grade should match the operating conditions and piping design.
Type A Stub End Fittings Standards and Certifications
Type A stub end fittings must meet the required dimensional and material specifications to ensure compatibility with lap joint flanges. As a Type A stub end fittings supplier in India, we provide products according to applicable industry standards, depending on the material grade, design, and intended application. Relevant specifications may include ASME B16.9 for butt weld fitting dimensions, ASTM A234 for carbon and alloy steel fittings, ASTM A403 for stainless steel fittings, and ASTM A815 for duplex and super duplex materials.
To support quality checks, we can provide material test certificates, chemical composition reports, mechanical test results, and dimensional inspection records as required. EN 10204 3.1 certificates, positive material identification (PMI), impact testing, and third-party inspections can also be arranged according to project specifications. Our quality systems are supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications. Documentation and inspection arrangements depend on the requirements agreed for each order.
Type A Stub End Fittings Applications
- Chemical Processing: Type A stub end fittings in stainless steel or alloy steel pair with carbon steel lap joint flanges on acid and solvent lines.
- Pharmaceutical and Food Plants: Stainless steel Type A stub ends give easy-to-open flanged joints for cleaning and inspection.
- Oil and Gas Facilities: Type A stub ends join spools and skids where bolt hole alignment is hard to achieve with fixed flanges.
- Water Treatment and Desalination: Duplex and 316L Type A stub ends carry brine and seawater with lower-cost backing flanges.
- Pump and Heat Exchanger Connections: The rotating lap joint flange helps line up bolt holes at equipment nozzles.
- Piping with Frequent Dismantling: Lines that crews open often for cleaning, sampling or inspection use Type A lap joint connections.
- Pipe Spool Fabrication: Fabricators weld Type A stub ends onto spools in the shop, and crews bolt them up on site with rotating flanges.
- Power Plants: Type A stub ends serve cooling water and auxiliary lines, and many projects source them from a Type A stub end fittings supplier in India like us.
- Shipbuilding and Offshore: Type A stub ends join seawater cooling and fire fighting lines on vessels and platforms.
Why Choose Us as Your Type A Stub End Fittings Manufacturer in India?
Choosing the right Type A stub end fittings manufacturer in India means finding a supplier that understands your pipe sizes, wall thicknesses and flange requirements. With over 20 years of experience in industrial steel products, we manufacture Type A stub end fittings for oil and gas, chemical processing, power generation and other industries. Our in-house production helps us maintain control over manufacturing, quality and delivery schedules.
We offer Type A stub end fittings in stainless steel, carbon steel, alloy steel, low-temperature steel, duplex, super duplex and nickel alloys. Our range covers long pattern, short pattern, seamless, welded and heavy-wall stub ends manufactured to applicable standards such as MSS SP-43 and ASME B16.9. We also supply Type B stub ends, lap joint flanges, elbows, tees and other pipe fittings to support a wider range of piping requirements.
With a monthly production and export capacity of up to 100 tonnes, we supply products to customers in 85+ countries. Our ISO 9001:2015 and ISO 14001:2015 certifications, along with TÜV approval and MSME registration, support our commitment to quality and responsible manufacturing. We provide material test certificates and inspection reports as required, with a focus on competitive pricing, clear communication and delivery within agreed schedules.
Countries We Export To
We export Type A stub end fittings to 85+ countries, supplying industrial projects in oil and gas, petrochemical, chemical processing, marine, and power generation sectors.
- 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 export packaging and shipping documentation. EN 10204 3.1 material test certificates can be provided as specified, while 3.2 certification and third-party inspections can be arranged upon request. Our focus is on secure packing, accurate documentation, and reliable delivery to customers worldwide.