FlangesPPTcompr email

8/7/2019 FlangesPPTcompr email

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Pipe FlangesPipe Flanges

Pipe Flanges


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Pipe FlangesPipe Flanges


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Most Used Pipe FlangesMost Used Pipe Flanges


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Flange ComparisonFlange Comparison


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The flanges are ideal forextreme fluctuations of

temperature.

This is themost common type of

high pressure high temperaturepipe flange.

High purchase cost

Best design for strength

Weld Neck FlangeWeld Neck Flange


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Weld Neck FlangeWeld Neck Flange


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Slip On FlangeSlip On Flange

Low

purch

ase co

st Purchase cost plus installation

cost about same asweld neck

flange

Welded both inside andoutside

Less time needed to spent on

ensuring the accuracy of the

cut pipe


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Slip On FlangeSlip On Flange


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SocketWeld FlangeSocketWeld Flange Socket welding flanges work well

for smaller sizes and higherpressure temperature conditions.

They are similar to slip-on

flanges, butmust specify the

schedule of the pipe. They create a smooth borewith

the properwelding and grinding.


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SocketWeld FlangeSocketWeld Flange


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Threaded FlangeThreaded Flange

Nowelding is required. Good for small pipe sizes.

The flanges are suitable to be used in

applications wherewelding is

hazard

ous.

They can be used in extremely high

pressure applications, particularly at

or near atmospheric temperature.

They are economical and time saving

devices


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Threaded FlangeThreaded Flange


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Lap Joint FlangeLap Joint Flange

Recommended in applications thatrequire frequent dismantling of the

flanges and pipe.

Usedwith amatching stub-end insert.

Can ro

tate to

allow

fo

r an easyalignment of bolt holes.

Not recommended in extreme or high-

pressure temperature applications.


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Lap Joint FlangeLap Joint Flange


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Blind FlangeBlind Flange

They are used to blank off the

ends of pipe.

They are also used to blank off

th

e ends of valves and pressurevessel opening.


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Blind FlangeBlind Flange


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Flat Face vs. Raised Face


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Flat Face FlangeFlat Face Flange


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Raised Face FlangeRaised Face Flange


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Flange Facing FinishesFlange Facing Finishes Determined by the standard used andmeasured as an

Arithmetical Average Roughness Height (AARH). An example

would be ANSI B16.5 which specifies face finisheswithin a

range 125AARH - 500AARH (3.2 Ra to 12.5 Ra).

ColdWater -Has amirror like finish.Madewith awide tool at a

high speedwhich gives a finished surfacemuch like a ground

surface.When a surface has this type of finish it is normally

usedmetal tometal, notwith a gasket. Seldom used in the oil,

chemical or related industries. Concentric Serrated - A 90 inclined angle tool is used tomake

the grove. Itmakes a grove 1/64 deep and 1/32 apart in a

concentric circle.

Smooth - This can bemadewith several different types of tool

shapes. No toolmarkingswill appear to the naked eye on the

surface. The roughness of the finish is from 125-250 microinch.

Spiral Serrated - This is similar to a stock finish but the

difference between them is theway the grove ismade. A 90

inclined angle tool is used tomake the grove. Itmakes a grove

1/64 deep and the feed is 1/32.

Stock - The surface is created by a continuous spiral groove. The

roughness of the finish is from 125 to 500microinches and is cut

with a toolwith an approximately 0.06 inches or larger radius.


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Flange Facing FinishesFlange Facing Finishes


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Ring Joint Face FlangeRing Joint Face Flange


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RING


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Flange Bolt OrientationFlange Bolt Orientation

On Centerline Straddle Centerline


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Flange Bolt OrientationFlange Bolt Orientation

On CenterlineStraddle Centerline


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