Socket weld fittings are available in sizes from 1/8 to 4 inches and in classes between 2000# and 9000#. Metallica provides the value added services, such as the heat treating, cutting, machining, painting and assembly. Socket Weld Pipe Fittings are produced to several ASTM standards and are manufactured in accordance with ASME B16.11. The B16.11 standard covers pressure-temperature ratings, dimensions, tolerances, marking, and material requirements for forged carbon and alloy steel. Acceptable material forms are forgings, bars, seamless pipe, and seamless tubes which conform to the fittings chemical requirements, melting practices, and mechanical property requirements of ASTM A105, A182, or A350. ASME B16.11 forged fittings are available with two types of end connections, which are called “socket weld” and “threaded”. Socket Weld Pipe Fittings Available on Sale, by India’s Largest Stockholder and Manufacturer in Seamless & Welded Form. To join pipe to Valves and fittings or to other sections of pipe, fillet-type seal welds be used. Socket-welded Joints construction is a good choice wherever the benefits of high leakage integrity and great structural strength are important design considerations. Fatigue resistance is lower than that in butt-welded construction due to the use of fillet welds and abrupt fitting geometry, but it is still better than that of most mechanical joining methods. SW Fittings are family of high pressure fittings and are used in various industrial processes. Metallica makes it easy for you to source top quality alloy steel socket weld pipe fittings at the lowest prices in India. We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers.

Alloy Steel Socket Weld Pipe Fittings Manufacturer, Wholesaler, Dealer, Supplier and Distributor In India and Abroad
  • As one of the largest manufacturer of Alloy Steel Socket Weld Pipe Fittings, we have over 6000 tons in stock

  • Alloy Steel Socket Weld Pipe Fittings Available at around Rs. 200/KG for Sale in India.

  • Our Annual Sales Volume for Alloy Steel Socket Weld Pipe Fittings is Over 25,000 tons in India and Overseas.

  • Alloy Steel Pipes and Tubes, are Sold with Complete Range of Related Pipe Fittings and Flanges

  • On-Time Delivery with Quality Assurance and Price Guarantee for Steel Socket Weld Pipe Fittings

  • Email Us on | Call Us On +918928722715.

Types of Alloy Steel Socket Weld Pipe Fittings

Description Class Designation
3000 6000 9000
Elbows 45 and 90 degrees, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps 1/2 – 4 1/2 – 2 1/2 – 2
Pipe Size (by Wall Thickness) SCH 80 / XS SCH 160 XXS

Plugs and Bushings are not identified. They may be used up through Class 6000 NPS.

Various Types of Socket Weld Pipe Fittings


Stock Range of Alloy Steel Socket Weld Pipe Fittings

1. Forged Fittings Type: Elbow, cross, street elbow, tee, coupling, half coupling, cap, plug, bushing, union, outlet, sage nipple, bull plug, reducer insert, pipe nipple etc.
2. Connection: Socket Welded(male or female), Threaded
3. Size Range: 1/8″ – 4″(6mm – 100mm)
4. Pressure Rating:
Threaded Forged Pipe Fittings: 2000LBS, 3000LBS, 6000LBS
Socket welding Wog 3000, 6000, 9000 LBS
5. Specifications:
1) Standard: ASME B 16.11, MSS-SP-79\ 83\ 95\97
2) Material:Carbon steel: ASTM A105/A694 F42/ 46/52/56/60/65/70/A350 LF3/A350 LF2
Stainless steel: ASTM A182 F304/ F304/ F316/F316L/F317/ 317L/ F321/ F310/ 347/ 904
Alloy steel: ASTM A182
3) Size of raw material: Dia. 19-85mm round bar.
6. Technology: Forged
7. Packing: Wooden cases or wooden pallet or as per customers requirement
8. Delivery Time: 25 days after order conformed
9. Payment: By T/T or L/C
10. Applications range: Petroleum, chemical, machinery, electric power, shipbuilding, Papermaking, construction etc

What are Socket Weld Pipe Fittings?

Forged Pipe Fittings (Socket Weld and Threaded) are made in accordance to ASME B16.11, MSS-SP-79\ 83\ 95\97 and BS3799 standards, and are used to connect nominal bore schedule pipes and pipelines. A socket weld pipe fitting, abbreviated as SWF, is one where the pipe is inserted into a recessed area of the fitting. To make a socket weld fitting, the pipe is inserted into the pipe before it is welded. In order to prevent damage to the pipe and fitting, the pipe is then backed out a minimum of 1/16” to allow for thermal expansion of the pipe during the welding procedure. If this clearance is not made, the weld can crack due to the pipe expanding against the fitting. Socket weld flange with pipe SW Fittings are used for piping that has a nominal pipe size (NPS) of 3 inches and below. The applications range from chemical, petrochemical, power generation and OEM manufacturing industry as well other applications where vibration, high pressure or extremely corrosive conditions exist.

What are the Applications of Socket Weld Pipe Fittings?

Socket weld fittings are used for applications where strong and long-lasting connections are required.  The typical applications for socket weld fittings are:

  • Steam
  • Explosive fluids and gases
  • Acids and toxic fluids
  • Long service / durable installations
  • They are used for lines conveying flammable, toxic or expensive material where no leakage can be permitted, and for steam 300 to 600 PSI.
  • They are used only in conjunction with ASME Pipe and are available in the same size range.
  • They are used in areas where pipe-work is permanent and are designed to provide good flow characteristics.

Product Size of Socket Weld Pipe Fittings

PE Socket Joint Fittings:

ELBOW 90° 20~75
ELBOW 45° 20~75
REDUCING TEE 25*20~50*32
END CAP 20~75
FEMALE ADAPTER 20*1/2″~63*2″
MALE ADAPTER 20*1/2″~63*2″
FEMALE ELBOW 20*1/2″~32*3/4″
MALE ELBOW 20*1/2″~32*3/4″
FEMALE TEE 20*1/2″~32*3/4″
MALE TEE 20*1/2″~32*3/4″
FEMALE UNION 20*1/2″~63*2″
MALE UNION 20*1/2″~63*2″

What are the Advantages of Socket Weld Pipe Fittings?

  • Light weight
  • Flexibility
  • Toughness
  • Chemically Inert
  • Resistance to Abrasion
  • Smooth surface
  • Environmental stress crack resistance
  • Corrosion resistance
  • Frost & rodent resistance
  • Hygienic safety
  • Easy & quick installation

What are the Disadvantages of Socket Weld Pipe Fittings?

There are also some shortfalls in using socket weld fittings. If the welder does not leave a gap between the pipe and the shoulder of the socket, there is a risk that the weld will fail either during the welding process or under high temperatures. This gap can cause solids to accumulate which can cause corrosion issues. If the piping is used for multiple process fluids, this accumulation may contaminate the additional process streams.

Difference Between Socket Weld Pipe Fittings and Threaded Fittings

  1. Socket weld fittings are used for applications where strong and long-lasting connections are required.  Socket weld fittings are very reliable but are time-consuming to install in a piping system (due to the heavy workload caused by welding operations on small parts). Threaded fittings are used for less-critical piping systems, such as water distribution, fire protection, and cooling, or for low-pressure installations not subject to vibration, elongation and bending forces. Threaded pipe fittings are not suited for fluids with constantly changing temperatures, as sudden changes may crack the connection.
  2. Socket weld fittings are connected to pipes by fillet welds, whereas threaded fittings are screwed onto the pipe or vice-versa.

What are the Equipment used in Socket Weld Pipe Fittings?

The equipment used to produce pipe fittings varies with respect to the forging processes which can be carried out:
• The method of applying the force.
• The size.
The different types of forging equipment include:
• Hammers
• Presses
• Upsetters
• Forging Rolls
• Ring Rollers
• Swaging Machines

Chemical and Mechanical Composition Of Alloy Steel Socket Weld Pipe Fittings

Low-alloy forged fittings match chrome-moly pipes ASTM A335 in grades P5 (for F5 fitting), P9 (for F9 fitting), P11 (for F11 fitting), P22 (for F22 fitting), P91 (for F91 fittings). The chemical composition of these common alloy grades for socket weld and threaded fittings is shown below:

Low-Alloy Forged Fittings Materials A182 F5 A182 F9 A182 F11 A182 F22 A182 F91
C 0.15 Max 0.15 Max 0.10-0.20 (2) 0.05-0.15 0.08-0.12
Mn 0.30-0.60 0.30-0.60 0.40-0.65 0.30-0.60 0.30-0.60
P 0.035 Max 0.030 Max 0.025 Max 0.035 Max 0.020 Max
S 0.030 Max 0.030 Max 0.040 Max 0.040 Max 0.010 Max
Si 0.50 Max 0.50-1.00 0.50-0.80 0.50 Max 0.20-0.50
Ni 0.50 Max 0.40 Max
Cr 4.0-6.0 8.0-10.0 1.00-1.50 2.00-2.50 8.0-9.5
Mo 0.44-0.65 0.90-1.10 0.44-0.65 0.90-1.10 0.85-1.05
V 0.18-0.25
Other Cb, 0.06-0.10; N, 0.03-0.07; Al, 0.04 max.

Effects of Alloying Elements on Steel

•Manganese – strength and hardness; decreases ductility and weldability; effects hardenability of steel.
•Phosphorus – increases strength and hardness and decreases ductility and notch impact toughness of steel.
•Sulfur decreases ductility and notch impact toughness Weldability decreases. Found in the form of sulfide inclusions.
•Silicon – one of the principal deoxidizers used in steel making. In low-carbon steels, silicon is generally detrimental to surface quality.
•Copper – detrimental to hot-working steels; beneficial to corrosion resistance (Cu>0.20%).
•Nickel – ferrite strengthener; increases the hardenability and impact strength of steels.
•Molybdenum –  increases the hardenability; enhances the creep resistance of low-alloy steels.

What are the Steel Pipe Sizes?

Steel pipe sizes

Pipe size is quoted as a “Nominal Pipe Size” or NPS. The origin of the NPS numbers for smaller pipes (< NPS 12) is different to the origin for larger diameter pipes. However, all pipes of a specific NPS number have the same external or outer diameter (OD). The internal diameter will vary depending on the wall thickness of the metal. The reason for this is so that the same structural supports can be used for all piping of a specific NPS number regardless of the wall thickness.


Steel pipe schedules are a way to describe the wall thickness of the pipe. This is a critical parameter as it is directly related to the strength of the pipe and the suitability for specific applications. A pipe schedule is a dimensionless number and is calculated based on the design formula for wall thickness, given the design pressure and allowable stress.

Examples of schedule numbers are as follows: 5, 5S, 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, STD, XS, and XXS—with the most common being schedules 40 and 80. As the schedule number increases, the wall thickness of the pipe increases. The schedule number of a pipe therefore defines the internal diameter, as the OD is fixed by the NPS number.

Over 10000 Tons in Stock for Alloy Steel Socket Weld Pipe Fittings!

ISMT & Jindal Steel Pipes Dealers, Original MTR's Provided with All Materials

As one of the biggest alloy steel socket weld pipe fittings stockholder and supplier in India, Metallica carries inventory of over 10,000 tons in its warehouses in Mumbai, Maharashtra India. We sell our alloy steel forged products throughout India, and to international clients. We can supply our alloy steel socket weld pipe fittings not only in industry-standard lengths and diameters, but also in custom length and diameters.

How are Steel Pipes Certified?

Certification of Steel Pipes

Manufacturers issue a Material Test Report or Mill Test Report to validate that the product meets the chemical analysis and mechanical properties specification. The MTR will contain all relevant data to the product and will accompany the product through its lifecycle.

The following are typical parameters that may be recorded on an MTR:

  • Chemical composition including carbon content, alloys, and sulfur
  • Material size, weight, identification, and grade
  • Material heat number, which ties back to the processing batch
  • Mechanical properties like tensile strength, yield strength, and elongation

At Metallica, we will Provide you with Original MTR’s for all Alloy Steel Pipe Products! We will Send Our Test Certificates, along with Quotation