Flange pcd chart

There are many common flange standards and these flange tables cover the most commonly found i. ANSI, PN and the old British BSTable D to K. Refer to our Flange Chart – ‘Online Slide Rule’ above for flange dimensions. The number and diameter (mm) of the bolt holes for the example below of 300NB is: x 25. Class 15 x 32mm Class 30 x 34.

Blind flange dimensions are covered in ASME B16.

Pipe Flanges and Flanged Fittings for size NPS ½” to 24” for above NPS 26” to 60” it should be as per ASME B16. Flange PCD Dimensions Dimensions for pitch circle diameter ( PCD ) of flange bolts, and the bolt sizes for the most common pipe sizes and flange ratings are shown in the tables below. See our page on Stud and Nut Sizes to determine the correct nut size. Flange comparison Guide Select Size Below for comparison What is DN? Put simply, it is a rough translation of mm from imperial sizes, assuming that an inch is 25mm.

We refer to a flange as DN30 when in fact it is 304mm. There are several standards for flanges , and we deal with four of. For flanges type the outside hub diameter approximately corresponds to the outside pipe diameter.

Slip on flange dimensions are covered in ASME B16. PCD of a flange is one of the critical dimensions, usually measured in millimeters. It is the diameter of the circle that passes through every bolt holes. It is usually used to measure the distance between the two opposite holes.

Use On Mechanical Piping Job Manualy Flange Making. Nominal Bore: Pipe OD A: Flange dia. D: Flange Thickness T: Welding Neck: Slip-on Screwed Socket-weld: Bolt PCD : No.

The following is chart data for ANSI B16. Pitch Circle Diameter of Flange Calculation. BOLTING PATTERN AND BOLT LENGTHS ASME B16.

For example, a flange that’s rated a PN4 40K or 6lbs will be able to withstand more pressure and excessive heat more so than a flange that has a lower pressure rating. Often times, a combination of a size and pressure rating may have the same dimensions as the same size flange with a higher pressure rating. You can find it by measuring distance from centre of one bolt hole to the centre of opposite end. Weights listed are approximate values. To be specified by the customer.

Flanges are furnished face drilled and spot faced or back faced. The size and measurements of different ISO mounting dimensions for valves and actuators.