Go Deeper to the Piping and Fabrication System

After take a holiday just for one day, my boss said that I have to go to the factory, in other word that I go to work now. While everyone is take a long holiday, I stuck on the factory to complete all the job, but that's no problem for me, because as an employee I have to obey what the boss said. And the positive thing is I can do the posting for Piping & Fabrication and continue this blog with a whole definition about Joint Penetration, Kinematic Viscosity, etc. So, keep visiting this blog, because we will go deep and deep to the Piping and Fabrication System.

Joint Penetration.

Joint Penetration Weld

The minimum depth a groove weld extends from its face into a joint, exclusive of reinforcement.

Kinematic Viscosity.
The ratio of the absolute viscosity to the mass density. In the metric system, kinematic viscosity is measured in strokes or square centimeters per second. Refer to Chap. B8 of this handbook.

Laminar Flow.
Fluid flow in a pipe is usually considered laminar if the Reynolds number is less than 2000.
Depending upon many possible varying conditions, the flow may be laminar at a Reynolds number as low as 1200 or as high as 40,000; however, such conditions are not experienced in normal practice.

Lap Weld.
Weld along a longitudinal seam in which one part is overlapped by the other. A term used to designate pipe made by this process.

Lapped Joint.
A type of pipe joint made by using loose flanges on lengths of pipe whose ends are lapped over to give a bearing surface for a gasket or metal-tometal joint.

Liquid Penetrant Examination or Inspection.
This is a nondestructive examination method for finding discontinuities that are open to the surface of solid and essentially nonporous materials. This method is based on capillary action or capillary attraction by which the surface of a liquid in contact with a solid is elevated or depressed. A liquid penetrant, usually a red dye, is applied to the clean surface of the specimen. Time is allowed for the penetrant to seep into the opening. The excess penetrant is removed from the surface. A developer, normally white, is applied to aid in drawing the penetrant up or out to the surface. The red penetrant is drawn out of the discontinuity, which is located by the contrast and distinct appearance of the red penetrant against the white background of the developer.

Local Preheating.
Preheating of a specific portion of a structure.

Local Stress-Relief Heat Treatment.
Stress-relief heat treatment of a specific portion of a weldment. This is done extensively with induction coils, resistance coils, or propane torches in the field erection of steel piping.

Deep inside this handbook of Piping and Fabrication, will also explain about penetration, preheating and anything else about Piping, Fabrication, Installation Pipe, Par Piping,Welding, etc.