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Socket Weld Pipe Fitting

Carbon, Alloy, Stainless Steel Forged Socket Weld Fittings

Manufacturer/Exporter Of High Quality Socket Weld Fittings – ASME B16.11

Socket Weld Elbow, Socket Weld Tee, Socket Weld Cross, Socket Weld Union, Socket Weld Coupling

A socket weld fitting is a pipe attachment detail in which a pipe is inserted into a recessed area of a valve,fitting or flange. 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.

PIPEFIT SOLUTION PVT. LTD.is Leading manufacturer and supplier of forged socket weld fittings, Forged socket weld fittings are available ex-stock in all major stainless steel grades (ASTM A182 F316L, F304L), carbon steel and alloy steel grades. In compliance with the latest market standards,this fitting is manufactured using high quality raw material and latest technology. Known for its features like high quality and light weight, this fitting is highly demanded in the market.

Socket weld fittings are available in pressure ratings of class 3000, 6000 and 9000. We are constantly adding to our diverse product range in order to better serve our valued customers.

Socket Weld Union

Socket Weld Tee

Socket Weld Elbow

Socket Weld Lateral Tee

Socket Weld Coupling

Socket Weld Caps

Socket Weld Cross

Details of socket weld fittings

They are 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 fittings. Acceptable material forms are forgings, bars, seamless pipe, and seamless tubes which conform to the fittings chemical compositions, melting practices, and mechanical property requirements of astm a105, a182, or a350.

Description

class designation

3000 lbs

6000 lbs

9000 lbs

Elbows 45 degree, Elbow 90 degree, tees, crosses, couplings, half-couplings, end or pipe caps

1/2 - 4

1/2 - 2

1/2 - 2

1/2 - 4

1/2 - 2

1/2 - 2

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

Typical applications of socket weld fittings are:

  • Steam
  • Explosive fluids / gas
  • Acids and toxic fluids
  • Long service / durable installations

The image shows a comparison between a socket weld and a butt weld fitting: the first requires only a fillet weld, wherease butt weld fittings imply more extensive welding of the butt weld ends.

Forged Pipe Fittings Manufacturing Standards

ASTM A182 – ASME SA182 – Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

ASME B16.9 – Factory-Made Wrought Buttwelding Fittings

ASME B16.11 – Forged Fittings, Socket – Welding and Threaded
MSS SP-43 – Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications

MSS SP-95 – Swage(d) Nipples and Bull Plugs

BS3799 – Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry

Advantages and disadvantages of Socket Weld fittings

ADVANTAGES

  • The pipe need not be beveled for weld preparation.
  • Temporary tack welding is no needed for alignment, because in principle the fitting ensures proper alignment.
  • The weld metal can not penetrate into the bore of the pipe.
  • They can be used in place of threaded fittings, so the risk of leakage is much smaller.
  • Radiography is not practical on the fillet weld; therefore correct fitting and welding is crucial. The fillet weld may be inspected by surface examination, magnetic particle (MP), or liquid penetrant (PT) examination methods.
  • Construction costs are lower than with butt-welded joints due to the lack of exacting fit-up requirements and elimination of special machining for butt weld end preparation.

DISADVANTAGES

  • The welder should ensure for a expansion gap of 1/16 inch (1.6 mm) between de pipe and the shoulder of the socket. ASME B31.1 para. 127.3 Preparation for Welding (E) Socket Weld Assembly says: In assembly of the joint before welding, the pipe or tube shall be inserted into the socket to the maximum depth and then withdrawn approximately 1/16" (1.6 mm) away from contact between the end of the pipe and the shoulder of the socket.
  • The expansion gap and internal crevices left in socket welded systems promotes corrosion and make them less suitable for corrosive or radioactive applications where solids buildup at the joints may cause operating or maintenance problems. Generally require butt welds in all pipe sizes with complete weld penetration to the inside of the piping
  • Socket welding are unacceptable for UltraHigh Hydrostatic Pressure (UHP) in Food Industry application since they do not permit full penetration and leave overlaps and crevices that are very difficult to clean, creating virtual leaks.

OTHER FORGED FITTINGS FOR PIPES

Other forged products belong to the family of forged fittings, namely:

  • Plugs: round / square / hex head shaped
  • Bushings: flush / hexagonal
  • Couplings: half / full
  • Reducers and reducer inserts (type 1/2)
  • Unions: male / female, female / female, lug nut, rockwood type (MSS SP 83)
  • Welding bosses




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