A flange bolt chart provides the bolt size, number of bolts, and flange dimensions for different flange pressure ratings. Below is a general chart for ANSI B16.5 flanges (widely used in industrial applications).
Flange Bolt Chart (ANSI B16.5 - Class 150 & 300)
Nominal Pipe Size (NPS) Class 150 - Bolt Details Class 300 - Bolt Details
1/2" (4) 1/2" x 2" (4) 1/2" x 2-1/4"
3/4" (4) 1/2" x 2-1/4" (4) 5/8" x 2-3/4"
1" (4) 1/2" x 2-1/2" (4) 5/8" x 3"
1-1/2" (4) 1/2" x 2-3/4" (4) 3/4" x 3-1/4"
2" (4) 5/8" x 3" (8) 3/4" x 3-1/2"
3" (4) 5/8" x 3-1/4" (8) 3/4" x 3-3/4"
4" (8) 5/8" x 3-1/2" (8) 3/4" x 4-1/4"
6" (8) 3/4" x 3-3/4" (12) 7/8" x 4-3/4"
8" (8) 3/4" x 4" (12) 7/8" x 5"
10" (12) 7/8" x 4-1/4" (16) 1" x 5-1/2"
12" (12) 7/8" x 4-1/2" (16) 1-1/8" x 6"
14" (12) 1" x 4-3/4" (20) 1-1/4" x 6-1/2"
16" (16) 1" x 5" (20) 1-1/4" x 7"
Key Points:
The bolt size, number of bolts, and length vary based on the flange class and pipe size.
Class 300 flanges require larger and more bolts than Class 150 flanges due to higher pressure resistance.
Proper gasket selection is essential for a leak-proof connection.
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Jack Screw is a sistem for dissasembling. The diference is that the flange has threathed holes where a bolt is installed.
its a m10 1.50.
48 hole bolt tightening seqence
The bolt head will tend to turn and slip off the closet flange if the bolt turns while tightening . To prevent this use a nut and washer to lock the bolt to the flange prior to mounting and always use a new wax ring when remountig.
With a tape measure.
Raised Face Through Bolt End.
To measure the ASA (American Standards Association) size of a pipe flange, you need to determine the nominal pipe size (NPS) and the flange's pressure class. Measure the outside diameter of the flange and the bolt circle diameter. Additionally, count the number of bolt holes and measure their diameter. These dimensions help identify the correct ASA flange standard for compatibility with piping systems.
A companion flange is where the end of the driveshaft meets the rear end(two flat pieces that bolt together).
A 42" flange takes an 1-1/2x7-1/2 bolt and an 1-1/2 hex nut.
what is the caliper bolt torque specs for a ford 97 club wagon
You have to take the lead and packing out that is holding the flange in the next piece of pipe. If your flange is broke where the toilet bolts go, this is very common. There is a repair available for this. It consists of two curved pieces of metal that are about 1/3 of the circumference of the flange. They go under the flange and give you a new place to put the bolt. They are a lot easier to use than replacing the whole flange.
A flange spreader is a device that uses a ratchet, leverage and fulcrum points to spread a bolt together connection. Usually welded pipe to flange, then a seal or gasket, and then another flange, and then welded or threaded pipe carries on. A flange spreader is used to spread the flanges apart to change a gasket or put in a spec blind to blank either side of the connection.