Piping

Pipe Invert Elevation

Pipe invert elevation is the vertical distance between the inside-bottom of a pipe and a given benchmark. Moreover, the term ‘invert’ stems from the resemblance of the pipe bottom to…

Popping Test

The Popping Test or Pop Test is a set pressure test of Pressure Relief Valve (PRV). It is done by compressing air into the inlet of PRV until the valve…

Q235 Steel

Q235 is low-carbon structural steel often used in China. This article will discuss Q235 steel, properties, equivalent grades, and applications. Q235 Steel “Q” is the first character of the Chinese…

Mechanical Joint vs. Flange

Determining when to use a mechanical joint vs. a flange is an essential consideration for piping engineers. In this article, you’ll learn the fundamentals of a mechanical joint connection, the…

SDR-21 vs Schedule 40 Pipe

SDR-21 and Schedule 40 pipe provide varying degrees of wall thicknesses for piping systems. SDR-21 provides the best choice in most irrigation and drainage applications where flexibility is the top…