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Slip On Flanges, All You Need To Know About Them

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By Author: Karan
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Slip on Flange is actually a hoop that's placed over the pipe end, with the flange face extending from the top of the pipe by enough distance to use a weld bead on the inside diameter.
The OD of slip on flange is additionally welded on the rear side of the flange. Slip on flanges have a lower material cost than weld neck flange and are more easily aligned.
Slip on flange can also be used joint flanges if B or Type C stub ends are used.

What is slip on Flanges used for?
Slip-On flange features a hole with matching outside diameter of pipe from which pipe can pass. The flange is placed on pipe and fillet welded from both inside and out of doors. Slip-On Flange is suitable for low and temperature applications. this sort of flange is out there in large sizes also to attach big-bore piping with tank nozzles. Normally, these flanges are of forged construction and are given the hub. Sometimes, these flanges are fabricated from plates and aren't given ...
... the hub.
Slip on Flange Pressure-Temperature category:
The Slip On Flange is assessed as per their pressure-temperature ratings that are selected as 150#, 300#, 400#, 600#, 900#, 1500# and 2500#. Massive diameter flanges that are 24” to 60” are accessible up to 900# category. Pressure-temperature ratings are the most allowable operating gauge pressures among the bar & the temperatures in degrees Celsius. Higher the rating, heavier the flange and will stand up to higher pressure and temperature. Once the temperature goes up, the pressure goes down, and also the alternative approach around.{Please note that totally different|completely different} material has different pressure ratings.
Material Used For manufacturing Slip On Flange
Flanges are factory-made from,
  Carbon steel
  Low alloy steel
  Stainless steel
  Combination of Exotic materials (Stub) and alternative packing materials
The list of materials conversant in manufacture flanges is roofed in ASME B16.5 & B16.47.
  ASME B16.5 - Slip on Pipe Flanges and Slip on Flanged Fittings NPS ½” to 24”
  ASME B16.47 -Large Diameter Steel Slip on Flanges NPS 26” to 60”
Commonly used solid material grads for Manufacturing Slip on Flanges are
  Carbon Steel: — ASTM A105, ASTM A350 LF1/2, ASTM A181
  Alloy Steel: — ASTM A182F1 /F2 /F5 /F7 /F9 /F11 /F12 /F22
  Stainless Steel: — ASTM A182F6 /F304 /F304L /F316 /F316L/ F321/F347/F348
Slip On Flange Inspection:
Following to be confirmed throughout associate inspection of a Slip On flange,
  Outer & Inner Diameter of body
  Bolt Circle & Bolt hole Diameter
  Hub Diameter & thickness of weld finish
  The Length of the Hub
  Straightness and alignment of the bolt hole
Permissible tolerances are given in B16.5 and B16.47 standards.
 

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