Piping Materials : Olets

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Olets are branching fittings made by Bonney Forge. Olets offer an alternate means of connecting into the main run and do not require reinforcement. Olets are pre-shaped to the curvature of the run pipe. Flat based weldolets are available for connecting to pipe caps and vessel heads.

Sweepolets are primarily developed for high-yield pipe used in oil and gas transmission lines. Sweepolets provides good flow pattern, and optimum stress distribution.

Olets are generally used for branching on high pressure and high temperature applications. Maxmumum allowable pressure of a fitting is same as for connected straight seamless run pipe of equivalent material.

Available Olet Fittings are :

  1. Weldolet
  2. Elbolet
  3. Sockolet
  4. Threadolet
  5. Sweepolet
  6. Latrolet
  7. Nipolet
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Weldolet

Used for 90 degree branch on pipe and for branch size of 2″ and higher where socket welding fittings are used for pipe sizes upto 1 1/2″.

Elbolet

These are used to tap on Elbow to save space. Useful to attach thermowells.

Sockolet

Sockolets are used to connect small bore socketwelding piping to larger size Buttwelding Piping Header.

Threadolet

Threadolets are used to connect small bore threaded fittings to Buttwelding Piping Network.

Sweepolet

Sweepolets are used for even flow distribution.

Nipolet

These are used to directly attach drain valves, pressure instruments etc. to header. It helps save extra fittings and installation work.

Dimensional Standard

Major dimensional standard used is :

MSS-SP-97 : Integrally Reinforced Forged Branch Outlet Fittings – Socket Welding, Threaded, and Buttwelding Ends.

Fittings Classes as per this standadrd are : 

  1. Standard : Buttwelding : 1/8″ to 24″, for connecting STD thk Pipe.
  2. Extra Strong : Buttwelding : 1/8″ to 24″ for connecting Extra Strong Pipe
  3. Schedule 160 : Buttwelding : 1/2″ to 6″ : for connecting Schedule 160 Pipe
  4. 3000 : Threaded and Socket Welding : 1/8″ to 4″ : for connecting Extra Strong Pipe
  5. 6000 : Threaded and Socket Welding : 1/2″ to 2″ : for connecting Sch 160 Pipe.
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Materials of Construction

Olets are forged fittings. So they are made from the same materials as Flanges and Socket Weld Fittings.

Materials of Construction for Forged Piping Fittings.

Sample Piping Material Specification.

  1. Element : Nippolet , Elbolet , Latrolet , Sockolet and Weldolet
  2. Length : 75 mm (Nipolets only)
  3. Material :     CS : ASTM A105
  4.                             SS: ASTM A182 Gr. F304L
  5. Class : 3000 (Only for Small bore branches)
  6. Ends :  Nippolet : Plain Ends
  7.                Sockolet : SW Ends
  8.                Elbolet : BW Ends
  9.                Latrolet : SW, BW Ends as per branch size.
  10.                Weldolet : BW Ends
  11. Dim. Standard : MSS-SP-97

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