Socket Weld Cap Fittings Manufacturer in India
Socket Weld Cap Fittings Manufacturer in India
Sachiya Steel International is a leading Socket Weld Cap Fittings Manufacturer in India, offering forged closures that seal the end of small-bore pipe through a fillet-welded socket joint. Established in 2005, we have 20+ years of experience in supplying socket weld caps in carbon steel, stainless steel, alloy steel, duplex steel and nickel alloys. Our product range covers Class 3000 and Class 6000 caps, forged and machined to match the sockets, walls and pipe sizes on your drawings.
We supply socket weld cap fittings in sizes from 1/8″ to 4″, with classes and materials to suit project requirements. Material options include ASTM A105, A350 LF2, A182 F304/F304L, F316/F316L and duplex grades, subject to availability. As an ISO-certified, TÜV-approved and MSME-registered company, we can manufacture and export up to 100 tonnes per month, serving customers across 85+ countries with inspection and material documentation available as required.
What Are Socket Weld Cap Fittings?
Socket weld cap fittings are forged pipe fittings with a closed end and an open socket. The socket is a recess with a step at its base, and the plain end of a pipe slides into it. A fillet weld around the outside edge of the socket then locks the pipe and cap together.
Fitters usually insert the pipe until it touches the base of the socket and then pull it back by about 1.6 mm before welding. That small gap lets the pipe expand during welding without cracking the joint. ASME B16.11 sets the dimensions of forged socket weld caps, and BS 3799 covers the same fittings for petroleum industry use. The required class, material grad
Socket Weld Cap Fittings
Socket Weld Cap Fittings are available in sizes from 1/8" to 4" and grades such as ASTM A105, A182 F304, F316, F316L, and F11. Designed to close pipe ends securely, these fittings are suitable for high-pressure piping systems in oil and gas, petrochemical, chemical, and power generation industries.
Socket Weld Cap Fittings Types We Supply
As an experienced Socket Weld Cap Fittings Manufacturer, we supply different types of socket weld caps to suit industrial piping systems and various operating requirements. Our products are available in different sizes, pressure ratings, and material grades to meet the needs of standard piping projects and specialized applications.
- Stainless Steel Socket Weld Caps: Suitable for piping systems that require corrosion resistance and durability.
- Carbon Steel Socket Weld Caps: Used in industrial applications that require strength and reliable performance.
- Alloy Steel Socket Weld Caps: Suitable for applications involving elevated temperatures and demanding operating conditions.
- Duplex and Super Duplex Socket Weld Caps: Offer strength and corrosion resistance for suitable industrial environments.
- Nickel Alloy Socket Weld Caps: Used in applications that require resistance to specific corrosive or high-temperature conditions.
We supply socket weld cap fittings in various material grades and pressure classes according to applicable standards and project specifications. Our team helps customers select suitable fittings based on piping dimensions, operating conditions, and material requirements.
Why Choose Socket Weld Cap Fittings?
Socket weld cap fittings provide a secure and compact way to close the ends of small-bore piping systems. Their socket design allows the pipe to fit inside the fitting before welding, creating a strong connection when installed correctly. These fittings suit industrial applications that require reliable pipe closure, leak prevention, and efficient installation.
- Strong Welded Connection: Provides a secure joint when properly installed and welded.
- Compact Design: Fits well in piping systems where installation space is limited.
- Reliable Sealing: Helps prevent leakage when the fitting and weld meet the required specifications.
- Easy Installation: The socket design helps position the pipe before welding.
- Material Versatility: Available in stainless steel, carbon steel, alloy steel, duplex steel, and nickel alloys, depending on requirements.
- Wide Industrial Use: Suitable for oil and gas, chemical processing, petrochemical, power generation, and other industrial piping systems.
Choosing the right socket weld cap fitting helps ensure a suitable connection for your piping application. Always consider the material grade, pressure class, temperature, and applicable standards when selecting fittings for your project.
Types of Caps Fittings
Explore our range of industrial cap fittings, including pipe end caps, butt weld caps, threaded caps, socket weld caps, stainless steel caps and carbon steel caps for diverse piping applications.
Pipe End Cap Fittings
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Butt Weld Cap Fittings
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Threaded Cap Fittings
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Socket Weld Cap Fittings
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Stainless Steel Cap Fittings
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Carbon Steel Cap Fittings
→Get Certified Socket Weld Cap Fittings at Competitive Factory Prices
Socket Weld Cap Fittings Specifications
| Property | Specification |
|---|---|
| Product Name | Socket Weld Cap Fittings |
| Types | Class 3000, Class 6000, forged carbon, stainless, alloy, duplex |
| Size Range | 1/8" to 4" NB |
| Pressure Class | 3000#, 6000# |
| Pipe Correlation | Class 3000 with Schedule 80 / XS pipe, Class 6000 with Schedule 160 pipe |
| Materials | Carbon steel, low temperature steel, alloy steel, stainless steel, duplex, super duplex, nickel alloys |
| Dimension Standards | ASME B16.11, BS 3799 |
| Material Standards | ASTM A105, A182, A350 |
| End Type | Socket weld |
| Construction | Forged and CNC machined |
| Surface Finish | Black, oil coated, pickled, polished |
| Heat Treatment | Normalising, solution annealing |
| Testing | PMI, hardness, dimensional, hydrostatic |
| Certification | EN 10204 3.1, 3.2 on request |
| How to Order | Size, class, grade and standard (for example: Socket Weld Cap 1", Class 3000, A105, ASME B16.11) |
| Custom Work | Special sizes, vent holes and grades |
Socket Weld Cap Fittings Chemical Composition
Values are in %, maximum unless a range is shown.
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| A105 | 0.35 | 0.60–1.05 | 0.10–0.35 | 0.035 | 0.040 | 0.30 | 0.40 | 0.12 |
| A350 LF2 | 0.30 | 0.60–1.35 | 0.15–0.30 | 0.035 | 0.040 | 0.30 | 0.40 | 0.12 |
| A182 F304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–11.0 | – |
| A182 F304L | 0.030 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–13.0 | – |
| A182 F316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| A182 F316L | 0.030 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 |
| A182 F51 (UNS S31803) | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 |
A105 also carries up to 0.40% copper and 0.05% vanadium. Duplex F51 carries 0.08–0.20% nitrogen.
Socket Weld Cap Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| A105 | 485 min | 250 min | 22 min |
| A350 LF2 Class 1 | 485–655 | 250 min | 22 min |
| A182 F304 / F316 | 515 min | 205 min | 30 min |
| A182 F304L / F316L | 485 min | 170 min | 30 min |
| A182 F51 | 620 min | 450 min | 25 min |
Socket Weld Cap Fittings Size Chart
| NPS | NB | Pipe OD (mm) | Where This Socket Weld Cap Size Goes |
|---|---|---|---|
| 1/8" | 6 | 10.3 | Gauge and sensor tubing ends |
| 1/4" | 8 | 13.7 | Instrument air and hydraulic line ends |
| 3/8" | 10 | 17.1 | Lubrication and pneumatic line ends |
| 1/2" | 15 | 21.3 | Sample, vent and drain line ends |
| 3/4" | 20 | 26.7 | Seal flush and utility line ends |
| 1" | 25 | 33.4 | Chemical dosing and skid piping ends |
| 1 1/4" | 32 | 42.2 | Cooling water and fuel line ends |
| 1 1/2" | 40 | 48.3 | Boiler auxiliary and drain line ends |
| 2" | 50 | 60.3 | Process header ends and test closures |
| 3" | 80 | 88.9 | Steam and utility supply line ends |
| 4" | 100 | 114.3 | Main utility and process header ends |
Socket Weld Cap Fittings Dimension Chart (ASME B16.11)
Socket and wall dimensions, Class 3000. B is the socket bore diameter (maximum and minimum), J is the minimum socket depth, C is the average socket wall thickness and K is the minimum thickness of the closed end. All dimensions are in mm.
| NPS | Socket Bore (B) | Min Socket Depth (J) | Socket Wall (C) | End Wall (K) |
|---|---|---|---|---|
| 1/8" | 11.2 / 10.8 | 9.5 | 3.18 | 4.8 |
| 1/4" | 14.6 / 14.2 | 9.5 | 3.78 | 4.8 |
| 3/8" | 18.0 / 17.6 | 9.5 | 4.01 | 4.8 |
| 1/2" | 22.2 / 21.8 | 9.5 | 4.67 | 6.4 |
| 3/4" | 27.6 / 27.2 | 12.5 | 4.90 | 6.4 |
| 1" | 34.3 / 33.9 | 12.5 | 5.69 | 9.6 |
| 1 1/4" | 43.1 / 42.7 | 12.5 | 6.07 | 9.6 |
| 1 1/2" | 49.2 / 48.8 | 12.5 | 6.35 | 11.2 |
| 2" | 61.7 / 61.2 | 16.0 | 6.93 | 12.7 |
| 2 1/2" | 74.4 / 73.9 | 16.0 | 8.76 | 15.7 |
| 3" | 90.3 / 89.8 | 16.0 | 9.52 | 19.0 |
| 4" | 115.7 / 115.2 | 19.0 | 10.69 | 22.4 |
Overall Length and Diameter
Q is the overall length of the cap and R is its outside diameter. All dimensions are in mm.
| NPS | Class 3000 Length (Q) | Class 3000 Diameter (R) | Class 6000 Length (Q) | Class 6000 Diameter (R) |
|---|---|---|---|---|
| 1/2" | 19 | 32 | 22 | 34 |
| 3/4" | 23 | 38 | 26 | 41 |
| 1" | 26 | 45 | 28 | 50 |
| 1 1/4" | 28 | 55 | 30 | 58 |
| 1 1/2" | 30 | 65 | 32 | 66.5 |
| 2" | 36 | 75 | 38 | 85 |
| 2 1/2" | 38 | 92 | – | – |
| 3" | 42 | 110 | – | – |
| 4" | 48 | 140 | – | – |
For other sizes and for Class 6000 values not shown, we cut the cap to the ASME B16.11 table or to your drawing.
Socket Weld Cap Fittings Grades We Supply
As a reliable Socket Weld Cap Fittings Supplier, we offer a wide range of material grades to meet different industrial piping requirements. Our fittings are available in stainless steel, carbon steel, alloy steel, duplex steel, super duplex steel, and nickel alloys to suit different operating conditions and applications.
- Stainless Steel Grades: SS 304, 304L, 310, 310S, 316, 316L, 317L, 321, 347, and 904L
- Carbon Steel Grades: ASTM A105 and other applicable grades, depending on specifications
- Alloy Steel Grades: ASTM A182 F11, F22, and F91
- 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 socket weld cap fittings for oil and gas, chemical processing, petrochemical, marine, and power generation applications. Our team helps customers choose suitable material grades based on corrosion resistance, temperature, pressure, and project specifications. Material availability and compliance depend on the required standards and order specifications.
Socket Weld Cap Fittings Standards and Certifications
We supply socket weld cap fittings manufactured according to applicable industry standards to meet different industrial piping requirements. As a reliable Socket Weld Cap Fittings Supplier in India, we offer fittings that meet relevant specifications, including ASME B16.11 for forged socket weld fittings. Our products are available in different pressure classes, sizes, and material grades, with materials selected according to applicable standards such as ASTM A182 for stainless steel and alloy steel forgings, ASTM A105 for carbon steel forgings, and relevant ASTM specifications for nickel alloys.
Our quality process includes material verification, dimensional inspection, and testing according to project requirements. We can provide EN 10204 3.1 material test certificates, chemical composition and mechanical test reports, and positive material identification (PMI) reports where required. Third-party inspections and additional testing can also be arranged according to customer specifications. These quality checks help verify material compliance, dimensional accuracy, and suitability for the intended piping application.
Socket Weld Cap Fittings Applications
- Oil and Gas Skids: Socket weld cap fittings close the ends of small-bore vent, drain and test lines on wellhead and metering packages.
- Refineries and Petrochemical Plants: Alloy steel caps seal spare branches and dead ends on high-pressure hydrocarbon lines.
- Power Plants and Boilers: Forged alloy steel caps close steam sampling and auxiliary lines at high temperature.
- Chemical Processing: Stainless steel 316L caps close dosing, sample and transfer lines handling corrosive fluids.
- Instrumentation Lines: Fitters weld caps onto impulse lines and spare instrument connections.
- Hydraulic and Compressed Air Systems: Machine builders close unused outlets and manifold ends with welded caps.
- Pump and Compressor Stations: Crews seal seal-flush and lubrication lines at equipment connections.
- Hydrostatic Testing and Commissioning: Teams cap small-bore headers to hold test pressure, and many projects source these caps from a socket weld cap fittings supplier in India like us.
- Marine and Offshore: Shipyards fit socket weld caps on engine room, deck and seawater service piping.
Socket Weld Cap Fittings Manufacturing Capacity and Export Capability
Our manufacturing facility in Vasai, near Mumbai, has the capacity to produce up to 100 tonnes of socket weld cap fittings per month. We forge and machine socket weld caps from 1/8" to 4" in carbon steel, stainless steel, alloy steel, duplex and other grades. With forging, heat treatment and machining handled at one facility, we maintain better control over production and can accommodate different sizes, classes and material grades in the same order.
We also have an export capacity of up to 100 tonnes per month and handle shipments ranging from sample quantities to full container loads. As a socket weld cap fittings supplier in India, we arrange shipments through Nhava Sheva (JNPT) and Mundra ports and manage export documentation in-house. Our products reach customers in 85+ countries, with a focus on proper packaging, smooth customs clearance and timely delivery.
Why Choose Us as Your Socket Weld Cap Fittings Manufacturer in India?
With over two decades of experience since 2005, we understand what buyers expect from a reliable Socket Weld Cap Fittings Manufacturer in India. We focus on consistent product quality, accurate dimensions, competitive pricing, and timely delivery to meet different industrial requirements. Our experience helps us handle standard orders, bulk quantities, and project-specific requirements for customers across various industries.
We offer socket weld cap fittings in different sizes, pressure classes, and material grades, including stainless steel, carbon steel, alloy steel, duplex steel, super duplex steel, and nickel alloys. Our available material grades include SS 304, 304L, 316, 316L, 904L, ASTM A105, ASTM A182 F11, F22, F91, 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 support bulk orders and ongoing supply requirements. We export to customers in 85+ countries and focus on dependable service, reliable product quality, and timely worldwide delivery. Whether you need standard socket weld caps or fittings for specific project requirements, we work to meet your technical specifications and delivery schedules.
Countries We Export To
We export socket weld cap fittings to customers in more than 85 countries worldwide. Our export network serves industries such as oil and gas, petrochemical, chemical processing, power generation, marine, and engineering. We supply fittings 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 is on maintaining product quality, coordinating orders efficiently, and delivering socket weld cap fittings to customers worldwide on schedule.