What is K factor piping?

Pipe fittings, valves and bends usually have some associated K factor or local loss coefficient, which allows the calculation of the pressure loss through the fitting for a particular fluid flowing at a specified velocity. Manufacturers of pipe work fittings and valves often publish a fitting’s associated ‘K’ factor.

How is NPT size measured?

To determine the NPT size, with a caliper, measure the diameter of the 2nd or 3rd thread on your pipe, fitting or valve as shown below. Find the caliper measurement in the chart and cross reference the nominal NPT pipe size. Don’t get confused, the actual measurement is not the same as the NPT pipe size.

What is the formula for measuring internal pressure in pipe?

PIPE SPECIFICATIONS BASICS Pressure Determinations: Barlow’s Formula is commonly used to determine: 1. Internal Pressure at Minimum Yield 2. Ultimate Bursting Pressure 3. Maximum Allowable Working Pressure 4. Mill Hydrostatic Test Pressure This formula is expressed as P = 2St where: I = Nominal wall thickness, inches D = Outside Diameter, inches

How to calculate pipe inside diameter?

Nominal Pipe Size OD You can calculate Pipe Inside Diameter (ID) with the help of Outside Diameter (OD) and Thickness of the pipe by using formula given below. Pipe ID =

How do you find the K factor of a pipe fitting?

The ‘K’ factor of a fitting may be calculated from the ‘Equivalent length’ (in m or ft.) if the friction factor and the Internal diameter (in m or ft.) are known. The ‘Equivalent length’ and ‘Internal diameter’ must be in the same units to calculate the ‘K’ factor. K = (EL * ff) / i.d. where: EL= Equivalent length of pipe (in m or ft)

Where can I find information about losses through pipe fittings?

Addition information about losses through pipe fittings is published in ‘Flow of Fluids through valves, fittings and pipe’ – Crane Technical Paper No. 410.