## What is ANSI flange standard?

ANSI B16. 5 -1996 is the official standard for ANSI Class Pipe Flanges and Flanged Fittings, applied specifically to those made from cast or forged materials, as well as blind flanges and some reducing flanges crafted in cast, forged, or plate.

**How is ANSI flange measured?**

When trying to determine the flange rating of a pump, the best method is to look for a stamp printed onto the flange. If one is not visible, or it is worn, then start by counting the number of bolt holes. This will point you to a narrower range of flange sizes in the chart below. Next measure the bolt circle diameter.

### What are flange specifications?

Diameters and bolt circles for standard ASME B16. 5 flanges – 1/4 to 24 inches – Class 150 to 2500.

Nominal Pipe Size NPS (inches) | Class 400 | |
---|---|---|

Diameter of Flange (inches) | Diameter of Bolt Holes (inches) | |

1 | 4-7/8 | 0.75 |

1-1/4 | 5-1/4 | 0.75 |

1-1/2 | 6-1/8 | 0.88 |

**What is PCD in flange?**

What is PCD? The PCD of a flange is one of the critical dimensions. PCD (Pitch Circle Diameter) is the diameter of a circle that goes through each of the bolt holes.

#### Is ANSI flange the same as ASME?

ANSI Flanges are manufactured based on standards developed by organizations and ASME Flanges are based on codes and standards for mechanical devices. The ANSI Flanges are designed based on approx. 9500 standards whereas ASME Flanges manufactured on 600 codes and standards for different mechanical devices.

**What is flange PCD?**

## What is the difference between ASME and ANSI flanges?

**How do I get PCD?**

Wheel PCD Measurement Calculation Formula

- 4 Stud PCD = Stud distance divided by 0.7071 to get PCD.
- 5 Stud PCD = Stud distance divided by 0.5878 to get PCD.
- 6 Stud PCD = Stud distance divided by 0.5 to get PCD.

### What is the formula for PCD?

Identify the size of the rim or tyre size. (This helps to narrow down the likely PCD sizes) Measure the distance ‘S’ between two adjacent studs from the centre of each hole….Pitch Circle Diameter – PCD Calculation Formula.

4 Stud PCD = | S |
---|---|

5 Stud PCD = | 0.5878 |

6 Stud PCD = | S |

0.5 |