MSS SP-97 Forged Branch Outlet Fittings – Socket Welding, Threaded, Buttwelding Ends – ASTM A105, A182 F304, F316, F304L, F316L, and A182 F5, F9, F11, F22, F91

  • Size: from 1/2″ NPS TO 24″ NPS, Pressure Rating: 3000LB, 6000LB (SCH80/XS,SCH160), Thread: NPT, NPSC, BSPT, BSPP, Type: Male and Female
  • Types of Outlets – Butt Weld Outlet, Socket Weld Outlet, Threaded Outlet, Elbow Outlet, Lateral Outlet, Nipple Outlet, Sweep Outlet, Flanged Nipple Outlet

Metallica is a well known manufacturer and supplier of forged branch outlet fittings for the clients from oil and gas, petrochemicals, railway, construction and other industries. Branch outlets are popularly known as Olets, which is a registered trademark of Bonney Forge. The MSS SP-97 Standard Practice covers essential dimensions, finish, tolerances, testing, marking, material, and minimum strength requirements for 90 degree integrally reinforced forged branch outlet fittings of buttwelding, socket welding, and threaded types. Fittings manufactured to this Standard Practice are designed to make a fully reinforced branch connection in accordance with applicable piping code requirements, when attached, at an opening in a run pipe by means of a full penetration weld. Fittings may be made to special dimensions, size, shape, tolerances, or of other wrought material by agreement between the manufacturer and the purchaser. We can produce forged branch outlet fittings in size range of 1/2″ to 24″. The most common and materials include ASTM A105, ASTM A182 F304, F316, F304L, F316L, and A182 F5/F9/F11/F22/F91. In nickel alloys we manufacturing forged branch outlets in various grades such as Alloy 200, 201, 400, K500, 600, 625, 800H/HT, 825, X-750, C276, Hastelloy B & C22.

Forged Socket Weld & Threaded 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 – Socket Welding and Threaded Forged Fittings
  • 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
  • MSS SP-83 – Socket Welding and Threaded Steel Pipe Unions
  • MSS SP-97 – Integrally Reinforced Forged Branch Outlet Fittings –Socket Welding, Threaded, and Buttwelding Ends

Socket weld and threaded fittings are generally used for small size pipes and piping systems (generally below 4 inches in diameter for Class 3000, and below 2 inches for fittings in class 6000 and 9000). Forged pipe fittings are manufactured by forging, followed by heat treatment and machining solid steel as per the dimensional standards. For bigger size piping systems buttweld pipe fittings produced as per ASME B16.9 are used.

Production Range of Forged Branch Outlet Fittings

Product Forged Branch Outlet Fittings
Connection Socket Weld, Threaded, Buttweld
Size 1/2″ to 24″
Pressure Rating 3000LB, 6000LB, 9000LB (SCH80/XS,SCH160,XXS)
Process method Forged, CNC Machined
Standards: MSS SP 97
Certification EN 10204 3.1
  • Thread: NPT, NPSC, BSPT, BSPP, Type: Male and Female

Forged Branch Outlet Materials & Grades

Carbon Steel ASTM A105/N, ASTM A350LF2, LF3, LF6
Duplex 2205(F51/60), 2507(F53)
Chrome Moly SA182, F1, F5, F5a, F9, F9l, F11, F12, F22
Stainless Steel 304/L/H, 316/L/H, 310, 317L, 321/H, 347/H, 410, 416, 420, 17-4, 440, Alloy 20
Nickel Alloys 200, 201, 400, K500, 600, 625, 800H/HT, 825, X-750, C276, Hastelloy B & C22

Manufacturing Process for Forged Socket Weld & Threaded Pipe Fittings

  • Forged fittings are the fittings made by forged steel. The process of manufacturing forged steel fittings include: cutting and heating billets, put pressure on heated billets under dies into desired shape, trimming and shot blasting. Then machine forged blank fittings for net shape and dimensions. According to the applications of forged steel fittings, they are available in threaded and socket weld end connections.
  • The main raw material for producing forged pipe fittings is round bar stock or billets.
  • Most of the forged steel fittings are not large, so closed die forging is normally adapted to produce forged steel fittings. Compared to the open die forging, the close die forging can achieve more complex geometries, very much close to the dimensions of the finished component.
  • Close die forging can produce forged fittings in all materials such as carbon steel, duplex, stainless steel or nickel alloys.

Types of Socket Welded & Threaded Forged Steel Pipe Fittings

  1. Elbows (90 Degree Elbows and 45 Degree Elbows) – A pipe elbow is a forged steel fitting installed between two lengths of pipe or tube allowing a change of direction, usually in the 90° or 45° direction. Similar to a reducing tee, reducing elbows also exist to simultaneously change flow direction and reduce flow diameter. Street Elbows have one female end to accept pipe and another male end thread that is the same size as the pipe and can avoid the use of a pipe nipple during installation.
  2. Tees (Equal Tee and Reducing Tees)- Tees are a type of forged steel fitting used to combine or divide process flow, and Reducing Tees additionally allow for pipe size change. The run outlets of the tee are the two in-line outlets, and the branch is the third outlet. The branch outlet is the reducing outlet in a reducing tee.
  3. Couplings (Straight and Reducing Couplings, Full and Half Couplings) – Couplings are a forged steel fitting used to connect two lengths of pipe, and Half-coupling is screwed onto the pipe, while the other end is made to be tightly inserted, or welded, onto the other end to pipe or vessel. Standard Couplings have female threads or open sockets at both ends, whereas reducing couplings connect smaller pipes to larger ones.
  4. Unions– Unions are a forged steel fitting similar to a coupling but allow a convenient disconnection and connection; it has 3 parts: a nut, a female end, and a male end. They allow two lengths of pipe to be assembled and detached without causing any deformation to the pipes.
  5. Bushings (Hex Head Bushings and Flush Bushings) – Reducing inserts and Bushings are forged steel fittings that allow for a change in pipe size. Pictured here is the hex head bushing, which is most commonly used.
  6. Caps (Pipe Caps and End Caps) – Caps are forged steel fittings used to terminate the flow, inserting over the end of the pipe.
  7. Plug (Square Head Plugs, Hex Head Plugs and Round Head Plugs) – Similar to a cap, plugs are forged steel fittings that are inserted into the end of the pipe, and they come with different head types, including: hex, square, and round.
  8. Cross – Crosses are a 4-way forged steel fitting, with 1 inlet and 3 outlets or vice versa. These are sometimes referred to as 4-way tees.
  9. Outlets (Weldolets, Sockolets, Threadolets, Elbolets, Latrolets and Nipolets)
  10. Nipples (Hexagonal Nipples and Swaged Nipples)