Basics of Ground Loops
A ground loop is an undesirable current path in an electrical circuit. Ground loops occur whenever the ground conductor of an electrical system is connected to the ground plane at
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Field Instruments Selection Aid
Operating Conditions and Requirements on the Measuring Point When a New Field Transmitter installation is being planned, measuring point / tapping point to be selected and certain requirements must be satisfied in order for
What is Double Block and Bleed Valves ?
What is Double Block and Bleed Valves ? API 6D defines a double-block-and-bleed valve (DBB) as a “single valve with two seating surfaces that, in the closed position, provides a
Important Factors Consider during Piping Design
Tubular products are termed ‘tube’ or ‘pipe’. Tube is customarily specified by its outside diameter and wall thickness, expressed either BWG (Birmingham wire guage) or in inches or in thousands.
What is an O-Ring?
What is an O-Ring? An O-ring is a torus, or doughnut-shaped ring, generally molded from an elastomer, although O-rings are also made from PTFE and other thermoplastic materials, as well
Tube Fitting Types
Tube fittings designed to connect a tube to pipe threads are called connectors. Tube fittings designed to connect one tube to another are called unions: If a tube union joins
Instrument Tube Fitting Installation – Part 1
Tubing vs. Pipe Standard fluid line systems, whether for simple household use or for the more exacting requirements of industry, were for many years constructed from threaded pipe of assorted
Instrument Tube Fitting Installation – Part 3
Common Causes of Imperfect Bends Figure A shows an ideal bend. Bends with little or no flattening are produced when correct equipment and methods are employed; when proper consideration is
Instrument Tube Fitting Installation – Part 2
Tube Stretch or Pickup When bent, tubing seems to stretch or pick up length. This is because it takes a curved shortcut across the inside of the angle. A good
What’s the problem with shock and vibration ?
Shock and vibration are among the worst enemies of any pressure sensor. They are also the hardest to identify, and even then it can be very difficult to rectify the