Type B Stub End Fittings Manufacturer in India
Type B Stub End Fittings Manufacturer in India
Sachiya Steel International is a leading Type B Stub End Fittings Manufacturer in India, established in 2005 and based in Mumbai. With over 20+ years of industry experience, we supply Type B stub ends for industrial piping systems that use compatible lap joint arrangements. Our range covers stainless steel, carbon steel, alloy steel, duplex steel, and nickel alloys, with short and long patterns available in seamless and welded construction, depending on specifications.
We offer Type B stub end fittings in sizes from 1/2 inch to 24 inches NB, with wall thicknesses, schedules, and bevel ends selected according to project drawings and applicable standards. Available grades include ASTM A403 stainless steel, ASTM A234 WPB, WPL6, WP11, and WP22, along with ASTM A815 duplex grades, subject to availability. Our quality systems include ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, along with applicable TÜV approvals and MSME registration. With a supply capacity of up to 100 tonnes per month, we serve customers across 85+ countries, with inspection reports and material documentation available as required.
What Are Type B Stub End Fittings?
Type B stub end fittings are pipe fittings used with compatible lap joint flange arrangements to create detachable connections in industrial piping systems. They are designed with a specific lap geometry to suit the intended flange configuration and help maintain a proper fit at the connection. The backing flange can rotate around the stub end, making bolt-hole alignment easier during installation.
These fittings are used in industries such as oil and gas, chemical processing, petrochemicals, and power generation. They are available in different sizes, wall thicknesses, and material grades to meet piping design requirements. The correct Type B stub end should be selected based on flange compatibility, pipe dimensions, material specifications, and operating conditions.
Type B Stub End Fittings
Type B 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 connections, these fittings are used in oil and gas, petrochemical, refinery, chemical, and power generation piping systems.
Type B Stub End Fittings Types We Supply
As a Type B stub end fittings manufacturer, we offer different material and construction options to meet the needs of industrial piping systems. Our range supports projects that require suitable flange connections, specific dimensions, and materials selected for the operating environment.
- Short Pattern Type B Stub Ends: Suitable for piping layouts that require a shorter fitting length.
- Long Pattern Type B Stub Ends: Used when additional length is needed to match the piping arrangement.
- Seamless Type B Stub Ends: Available for applications that specify seamless construction.
- Welded Type B Stub Ends: Supplied for projects where welded construction meets the applicable requirements.
- Stainless Steel Type B Stub Ends: Suitable for systems requiring corrosion resistance.
- Carbon Steel Type B Stub Ends: Used in many general industrial piping applications.
- Alloy and Duplex Steel Type B Stub Ends: Available for applications with specific strength, temperature, or corrosion-resistance needs.
We offer different sizes, wall thicknesses, and material grades according to project drawings and applicable specifications. The fitting design must be compatible with the intended flange arrangement.
Why Choose Type B Stub End Fittings?
Type B stub end fittings are useful for piping systems that require a detachable flange connection and convenient access during maintenance. When paired with a compatible backing flange, they allow the flange to rotate for easier bolt alignment without turning the pipe itself. Their suitability depends on the specified stub end geometry and flange arrangement.
- Easier Assembly: The rotating backing flange simplifies bolt-hole alignment during installation.
- Maintenance Access: The connection can be dismantled when pipes or connected equipment need inspection or repair.
- Material Choices: Different steel grades are available to suit the fluid, temperature, and surrounding environment.
- Flexible Piping Layouts: Various dimensions help accommodate different installation requirements.
- Industrial Applications: Used in process plants, refineries, chemical facilities, and other suitable piping systems.
- Practical Flange Connections: Compatible arrangements can simplify installation where frequent access is important.
Selecting Type B stub end fittings requires checking the flange design, dimensional requirements, material grade, and operating conditions to ensure the connection is suitable for the intended application.
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 Tybe B Stub End Fittings at Competitive Factory Prices
Type B Stub End Fittings Specifications
| Property | Specification |
|---|---|
| Product Name | Type B Stub End Fittings (Lap Joint Stub Ends for Slip-On Flanges) |
| Types | Short pattern, long pattern, seamless, welded, light wall, heavy wall, serrated face |
| Size Range | 1/2" to 24" NB |
| Lap Type | Type B (very small 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 | 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 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 B Stub End 2", Short Pattern, Sch 10S, A403 WP304L, MSS SP-43) |
| Custom Work | Special lengths, lap thicknesses, corner radii and grades |
Type B 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 B 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 B Stub End Fittings Size Chart
| NB | Inch | Pipe OD (mm) | Where This Type B 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 pipeline flange joints |
Type A, Type B and Type C Stub Ends Compared
| Feature | Type A | Type B | Type C |
|---|---|---|---|
| Mating flange | Standard lap joint flange | Slip-on flange used as a backing flange | Lap joint flange or slip-on flange |
| Outside corner of the lap | Radius to match the flange bore | Very small radius (about 0.76 mm) | Short fillet radius |
| Lap thickness | Equal to or greater than the pipe wall | Equal to or greater than the pipe wall | About 75% of the pipe wall |
| Lap face | Machined, serrated | Machined, serrated | Flared, not machined |
| Common use | Standard process piping | Lighter-wall stainless steel piping | Fits many backing flanges |
Type B 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. All dimensions are in mm.
| NPS | Pipe OD | Lap Thickness (T) | Lap Diameter (G) | Type B Radius (R) | Short Pattern Length (F) | Long Pattern Length (F) |
|---|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 34.9 | 0.76 | 50.8 | 76 |
| 3/4" | 26.7 | 2.11 | 42.9 | 0.76 | 50.8 | 76 |
| 1" | 33.4 | 2.77 | 50.8 | 0.76 | 50.8 | 102 |
| 1 1/4" | 42.2 | 2.77 | 63.5 | 0.76 | 50.8 | 102 |
| 1 1/2" | 48.3 | 2.77 | 73.0 | 0.76 | 50.8 | 102 |
| 2" | 60.3 | 2.77 | 92.1 | 0.76 | 63.5 | 152 |
| 2 1/2" | 73.0 | 3.05 | 104.8 | 0.76 | 63.5 | 152 |
| 3" | 88.9 | 3.05 | 127.0 | 0.76 | 63.5 | 152 |
| 3 1/2" | 101.6 | 3.05 | 139.7 | 0.76 | 76.2 | 152 |
| 4" | 114.3 | 3.05 | 157.2 | 0.76 | 76.2 | 152 |
For sizes from 5" to 24", the lap diameter and length follow the ASME B16.9 table, and the Type B radius stays small. For other sizes, lengths and lap diameters, we cut the stub end to your drawing.
Type B Stub End Fittings Grades We Supply
The material used for a Type B stub end affects how it performs under specific operating conditions. We offer several grades to suit piping systems handling different fluids, temperatures, and pressure requirements. As a Type B stub end fittings supplier, we help match material options with project specifications and the intended industrial application.
- Carbon Steel: ASTM A234 WPB for general industrial piping.
- Low-Temperature Steel: ASTM A420 WPL6 for specified low-temperature service.
- Alloy Steel: ASTM A234 WP11, WP22, and WP91 for suitable high-temperature applications.
- Stainless Steel: ASTM A403 WP304, WP304L, WP316, WP316L, WP321, and WP347.
- Duplex Steel: ASTM A815 UNS S31803 and S32205.
- Super Duplex Steel: UNS S32750 and S32760 for demanding corrosive environments.
- Nickel Alloys: Inconel 625, Monel 400, Incoloy 825, and Hastelloy C276 for specialised applications.
We supply Type B stub end fittings in different dimensions and wall thicknesses, subject to material availability and applicable specifications. Grade selection depends on operating conditions, corrosion exposure, and project requirements, with testing and material documentation arranged as specified.
Type B Stub End Fittings Standards and Certifications
For industrial piping projects, Type B stub end fittings must match the required dimensions, material specifications, and flange arrangement. As a Type B stub end fittings supplier in India, we follow the applicable standards specified for each product and project. These requirements help ensure that fittings are suitable for their intended piping applications.
- ASME B16.9: Covers dimensions and tolerances for applicable factory-made butt-welding fittings.
- ASTM A234: Specifies carbon steel and alloy steel fittings for suitable pressure piping applications.
- ASTM A403: Covers wrought austenitic stainless steel piping fittings.
- ASTM A815: Applies to suitable duplex and ferritic/austenitic stainless steel fittings.
- ASME B16.25: Covers butt-welding end preparation where applicable.
Quality Documents and Inspection
We can provide the following documentation according to order specifications:
- EN 10204 3.1 material test certificates
- Chemical composition and mechanical test reports
- Dimensional inspection records
- Positive material identification (PMI), where required
- Third-party inspection and additional testing by arrangement
Our quality systems are supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications. The exact standards, tests, and certificates depend on the material grade and project requirements.
Type B Stub End Fittings Applications
- Pharmaceutical and Food Plants: Type B stub end fittings in light-wall stainless steel give easy-to-open flanged joints for cleaning and inspection.
- Dairy, Brewery and Beverage Plants: Stainless steel Type B stub ends pair with slip-on backing flanges on process and utility lines.
- Chemical Processing: Type B stub ends in 316L or alloy steel connect with carbon steel slip-on flanges on lower-pressure acid and solvent lines.
- Water Treatment and Desalination: Duplex and 316L Type B stub ends carry brine and treated water with lower-cost backing flanges.
- Utility Piping: Type B stub ends serve compressed air, cooling water and steam condensate lines in plants and workshops.
- Pump and Heat Exchanger Connections: The rotating backing flange helps line up bolt holes at equipment nozzles.
- Maintenance and Replacement Work: Crews use Type B stub ends with slip-on flanges already in stock to repair or extend existing lines.
- Pipe Spool Fabrication: Fabricators weld Type B stub ends onto spools in the shop, and many projects source them from a Type B stub end fittings supplier in India like us.
- Shipbuilding and Offshore: Type B stub ends join seawater cooling and fire fighting lines on vessels and platforms.
Why Choose Us as Your Type B Stub End Fittings Manufacturer in India?
Finding the right Type B stub end fittings involves more than choosing a material. The fitting must match the flange arrangement, pipe dimensions, and installation requirements. Established in 2005, we bring 20+ years of experience in the steel fittings industry, supplying Type B stub ends in sizes from 1/2 inch to 24 inches NB. Our material range includes carbon steel, stainless steel, alloy steel, duplex, super duplex, and nickel alloys, with grades such as ASTM A234 WPB, ASTM A403 WP304/316, and ASTM A815 UNS S31803/S32205, subject to availability.
We handle industrial orders with a monthly production and export capacity of up to 100 tonnes, serving customers in 85+ countries. Our certifications include ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018, along with applicable TÜV approvals and MSME registration. Material test certificates, dimensional inspection reports, and additional testing can be arranged according to project specifications. Whether the requirement involves standard dimensions or specific drawings, we focus on accurate specifications, competitive pricing, and dependable delivery for industrial piping projects.
Countries We Export To
We ship Type B stub end fittings to 85+ countries, and as one of the Type B stub end fittings suppliers that serve process plants, power stations, water projects and shipyards, we cover every major region.
- North America: USA, Canada and Mexico
- Europe: United Kingdom, Germany, France, Italy, Netherlands and Spain
- Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain
- Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam and Australia
- Africa: South Africa, Nigeria, Egypt and Kenya
- South America: Brazil, Chile and Peru
Each shipment carries an EN 10204 3.1 certificate, and we arrange 3.2 or third-party inspection on request. We pack for sea freight and prepare every export document ourselves, so cargo clears customs on schedule.