Flanges Dimensions Explained With Chart - A complete guide
Flange dimensions are critical for ensuring a right match and stable connection in piping structures. In addition to the important factors cited earlier, the subsequent elements additionally play an important function in flange preference:
Outer Diameter (OD): Determines the overall size of the flange and its compatibility with adjacent additives.
Bolt Circle Diameter (BCD): The circular distance among the facilities of bolt holes, ensuring proper alignment with the mating flange.
Hub Height: The raised part of a weld neck flange, which helps in distributing pressure lightly all through the relationship.
Gasket Seating Surface: The place wherein the gasket is located to shape a leak-evidence seal among flanges.
Material Selection: Flanges are made of stainless-steel, carbon metallic, alloy metal, and man or woman metals like Hastelloy and Inconel, each selected primarily based on particular environmental and mechanical situations.
Correctly measuring those parameters ensures leak prevention, structural integrity, and compliance with enterprise standards. By referring to a flange dimensions chart in mm, engineers and procurement specialists can choose the maximum suitable flange for his or her operational goals.
Key Parameters in Flange Dimensions
- Nominal Pipe Size (NPS): Represents the approximate inner diameter of the connected pipe.
- Outside Diameter (OD): The considerable outside width of the flange.
- Bolt Circle Diameter (BCD): The diameter of the circle formed via the bolt holes.
- Number of Bolt Holes: The wellknown quantity of holes used to lock the flange.
- Bolt Hole Diameter: The width of the holes via which bolts bypass.
- Flange Thickness: The stylish thickness of the flange, impacting pressure resistance.
- Hub Diameter and Length: The length of the hub element, relevant in hubbed flanges ansi 150 dimensions.
Common Flange Standards
Different industries comply with specific requirements for flange dimensions, which include:
- ANSI/ASME B16.5: Covers flanges as long as 24 inches in period.
- ANSI/ASME B16.47: For large flanges (above 24 inches).
- Din flanges dimensions: (Deutsches Institut für Normung): European favored for flanges.
- BS 3293: British contemporary day for metal pipe flanges dimensions.
- PN Flanges (Pressure Nominal): Used in European piping systems.
- SAE Flanges: Used in hydraulic programs.
- Flange Pressure Classes and Corresponding Dimensions
Flanges are labeled primarily based on stress scores, generally categorized into 100 and fifty, three hundred, 600, 900, 1500, and 2500 lessons. The better the class, the extra the stress it can resist.
Class flange dimensions 150,
Class flanges 150 class dimension are appreciably utilized in low-pressure packages. Below is a length chart for reference:
|
NPS (inches) |
OD (inches) |
BCD (inches) |
No. of Bolts |
Bolt Hole Diameter (inches) |
Flange Thickness (inches) |
|
1/2 |
3.50 |
2.38 |
4 |
0.63 |
0.44 |
|
3/4 |
3.88 |
2.75 |
4 |
0.63 |
0.50 |
|
1 |
4.25 |
3.13 |
4 |
0.63 |
0.56 |
|
2 |
6.00 |
4.75 |
4 |
0.75 |
0.75 |
|
4 |
9.00 |
7.50 |
8 |
0.75 |
0.94 |
|
6 |
11.00 |
9.50 |
8 |
0.88 |
1.00 |
|
8 |
13.50 |
11.75 |
8 |
0.88 |
1.13 |
|
10 |
16.00 |
14.25 |
12 |
1.00 |
1.19 |
|
12 |
19.00 |
17.00 |
12 |
1.00 |
1.25 |
Class 300 Flange Dimensions
Class flange dimensions 300 handle higher pressures than Class 150. Below are standard dimensions:
|
NPS (inches) |
OD (inches) |
BCD (inches) |
No. of Bolts |
Bolt Hole Diameter (inches) |
Flange Thickness (inches) |
|
1/2 |
3.75 |
2.62 |
4 |
0.62 |
0.56 |
|
3/4 |
4.62 |
3.25 |
4 |
0.75 |
0.62 |
|
1 |
4.88 |
3.50 |
4 |
0.75 |
0.69 |
|
2 |
6.50 |
5.00 |
8 |
0.75 |
0.88 |
|
4 |
10.00 |
7.88 |
8 |
0.88 |
1.19 |
|
6 |
12.50 |
10.62 |
12 |
1.00 |
1.38 |
Flange Types and Their Dimensions
Different flange kinds require unique dimensional concerns.
Slip-On Flanges Dimensions
Slip on flanges dimensions are smooth to install, presenting a loose match over pipes earlier than welding. Their dimensions comply with ansi flanges dimensions B16.5
Blind Flanges Dimensions
Blind flanges seal off piping systems, making their thickness and bolt styles essential. They are available in ANSI, dn flanges dimensions, and PN standards.
Weld Neck Flanges Dimensions
Weld neck flanges function a protracted hub for more advantageous strength, requiring particular NPS and bolt sample matching.
Table E Flanges Dimensions
Table E flanges are usually utilized in Australian piping structures, with dimensions various based on stress necessities.
Flange Dimension Standards in Different Systems
Flanges pn16 dimensions (PN10, PN16)
PN flanges are European wellknown flanges labeled based on strain:
Flanges pn10 dimensions: Used for low-strain packages.
Pn16 flanges dimensions: Suitable for medium-strain pipelines.
SAE Flange Dimensions
Sae flanges dimensions are commonplace in hydraulic systems, supplying compact and excessive-pressure resistance.
DIN Flange Dimensions
DIN requirements are extensively used in Europe, defining precise dimensional and stress necessities.
BS 3293 Flange Dimensions
The bs 3293 flanges dimensions huge-diameter metal flanges, more often than not for high-stress packages.
Selecting the Right Flange Dimensions
When choosing a flange, keep in mind the subsequent:
- Application Requirements: High-stress vs. Low-stress systems.
- Material Compatibility: Carbon metal, stainless steel, or alloys.
- Standard Compliance: Ensure adherence to ANSI, DIN, or PN requirements.
- Flange Type: Slip-on, weld neck, blind, and so forth.
Conclusion
Understanding flange dimensions is crucial for deciding on the right additives to your piping machine. Whether coping with flanges 125 class dimensions,PN16, or DIN preferred flanges, having the correct dimensions ensures performance and safety. Contact Manilaxmi Industrial today and find the right choices and enhance the reliability of your business tasks.