# How thick is a 300 flange?

## How thick is a 300 flange?

ANSI/ASME B16. 5 Class 300 Forged Flanges Add Flanges

Nominal Size | Outside Diameter (OD) | Min. Thickness (T) |
---|---|---|

31⁄2 | 9.00 | 1.12 |

4 | 10.00 | 1.19 |

5 | 11.00 | 1.31 |

6 | 12.50 | 1.38 |

**What is a class 300 flange?**

The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are constructed with more metal and can withstand more pressure. However, there are a number of factors that can impact the pressure capability of a flange.

### Are 300 and 600 flanges the same?

Different Pressure Classes for Flanges The difference between these three flanges is the pressure class! This is a class 150, this is a class 300, and this is a class 600. The differences are in the dimensions except for the bore!

**What is a 300 pound flange?**

300# flange bolt chart is used to assist engineers and pipe fitters with calculating the number of fasteners associated according to flange size. A Class 30 300 lb flange dimensions can handle more pressure as compared to a Class 150 flange.

#### How many bolt holes in a 300 flange?

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 300 | |
---|---|---|

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

1/2 | 3-3/4 | 0.62 |

3/4 | 4-5/8 | 0.75 |

1 | 4-7/8 | 0.75 |

**What pressure is a 300 flange rated for?**

570 psi

the class 300 flange (bigger and stronger, but with the same bore size) withstands 570 psi at the same temperature of 600 degrees F° finally, a class 2500 flange of the same size bears 34 times more pressure than the class 150 rated flange, reaching a whopping 4730 psi rating at 600 F°!

## How much pressure can a 300 flange take?

**How many bolt holes are in a 2 300 flange?**

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 300 | |
---|---|---|

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

2 | 6-1/2 | 0.75 |

2-1/2 | 7-1/2 | 0.88 |

3 | 8-1/4 | 0.88 |

### How do I choose a flange rating?

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.

**How much pressure can a 600 flange take?**

890 psig

2 at a temperature of 650°F (343°C), a Class 600 flange has a rating of 890 psig (6136 kPa gage) at 650°F (343°C).

#### How do I choose a flange?

Guidelines for Selection of Various Types of Flanges (PDF)

- Pressure Temperature Rating of Flanges.
- Flange Dimensional Standards.
- Flange Facings.
- The bore of Welding Neck Flanges and Hub Design.
- Flange Material Limitations.
- Iron Flanges.
- Carbon Steel Flanges.
- Low and Intermediate Alloy Steel Flanges.