Stub Ends are fittings used in place of welded Flanges



JAV Forgings & Engineering Private Limited in Faridabad Haryana India discusses Stub Ends are fittings employed in place of welded flanges wherever rotating back up flanges are desired. They are also referred to as Lap Joints and Vanstone flared Laps. JAV Forgings & Engineering Pvt. Ltd. is India’s leading steel forging manufacturer and supplier of a diverse range of products. Our forging product list includes high quality of Flanges, Tube sheets, Rings and Shafts, Spectacle Blinds, Stub ends, Ring-joint gaskets and Self-reinforced nozzles.
A rotating back up flange seats itself against the back surface of the Stub end. Once bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the Stub end. The gasket surface of the Stub end then presses against a gasket and another gasket surface provides joints like standard flange joints. The seal is formed by the gasket surface of the stub end alone, the flange only provides the clamping pressure on the joint.
A stub end and a lap joint flange can be used together as an alternative way to make a flanged connection than welding neck flanges.
The two devices to be combined, in this case, are:
  • The stub end, which is essentially a piece of pipe, with one end flared outwards and the other prepared to be welded to a pipe of the same bore size (NPS = nominal pipe size), material and wall thickness. The most widely used fabrication tool for stub ends is the flaring machine, which is able to flare the end of the pipe and then cuts it to length.
  • A Lap Joint Flange, which is used to actually bolt the two lengths of pipe together.




BENEFITS OF LAP JOINT STUB ENDS

The use of stub ends has these two advantages:

·        Reduces the overall cost of the flanged joint

·        Facilitates the installation of the flange

STUB END TYPES

Stub ends are available in three different types, named “Type A”, “Type B” and “Type C”:

  • The first type (A) is manufactured and machined to match standard lap joint backing flange (the two products have to be used in combination). The mating surfaces have an identical profile to permit a smooth loading of the flare face
  • Stub ends type B are have to be used with standard slip-on flanges
  • Type C stub ends can be used either with lap joint or slip-on flanges and are manufactured from pipes.

SHORT/LONG PATTERN STUB ENDS (ASA/MSS)

Stub ends are available in two different patterns:

  • the short pattern, called MSS-A stub ends
  • the long pattern, called ASA-A stub ends (or ANSI length stub end)

Short pattern (MSS) and long pattern stub ends (ASA)

STUB END FINISH

Stub ends can be ordered with different ends finishing:

  • Beveled Ends
  • Squared Ends
  • Flanged Ends
  • Grooved Ends
  • Threaded Ends (Male Only)












4 comments:

  1. Nice Blog, Thanx For Sharing. We Rachna Fasteners is an ISO 9001:2008 certified & CE Approved Fasteners manufacturer As Per EN-15048 Part-1 and 2 from TUV Nord leading manufacturer of high tensile hot and cold forged fasteners in India. EN 14399 manufacturer Supplier in India, Automotive fasteners, superior fasteners.

    Din 933 Screw Supplier Ludhiana
    ISO 4014 Manufacturer Ludhiana
    ISO 4017 Manufacturer India
    Hexagon Bolts Manufacturer In India
    Automotive Fasteners Manufacturer In India
    ISO Certified Fasteners
    Ce Certified Fasteners India
    15048 Assembled Bolting
    Non Preloaded Assembly 15048
    Preloaded Assembled Bolting 14399

    ReplyDelete
  2. Thank you so much for sharing such a valuable information with us.

    Bhatia Alloy Forgings is one of the largest aluminum forging companies in India. We can provide a customized forging and machining service ranging from 0.05kg to 10kg to match your exact design specifications with any grade of aluminum desired.

    ReplyDelete
  3. An Introduction to Forging Steel Processes

    Steel assumes in significant job in human life. Truth be told, its impact on our lives is extraordinary to the point that it very well may be found in pretty much every family.

    Utilization of Glass As a Versatile Forging Lubricant

    The greater part of the things that are utilized in a house for day by day purposes contain manufactured metal parts. In the prior occasions, manufacture glass covering and metal producing were done physically.

    steel forging process

    ReplyDelete
  4. I loved this assignment article and kept updating interesting articles. I will be a regular reader. I am offering help to students over the globe at a low price.
    computer science project help
    Do my computer science assignment

    ReplyDelete