Piping and Valves topic area

This topic covers the design of piping and valves, and their role within a process safety management program. Discussions to do with equipment are provided at this topic page.

The following is a list of the typical piping and valves that are covered by an asset integrity program.

  • Pipe (specifications and sizing)
  • Materials
  • Equipment
  • Piping
  • Fittings
  • Flanges
  • Gaskets
  • Blinds
  • Flame Arrestors
  • Vortex Breakers
  • Hoses
  • Block Valves
  • Globe / Control Valves
  • Rotary Valves
  • Check (Non-Return) Valves
  • Flangeless Valves
  • Valve Seat Materials
  • Valve Position
  • Steam Traps
  • Pressure Safety Relief Valves
  • Thermal Relief Valves
  • Rupture Disks

Articles, safety moments and other publications to do with piping and valves are shown below.

Copyright © Ian Sutton. 2018. All Rights Reserved.

Safety Moment #88: Blinds in Process Piping

 Isolation Methods

Positive isolation methods are those which remain effective even if there is equipment failure or operator error. These techniques apply not only to vessels, piping and tanks but also to pneumatic and hydraulic equipment.

The sketch shows some of the various isolation techniques that can be used to protect workers in the process industries. The process containing toxic or flammable chemicals under pressure is on the left; the open system, where the workers are present, is on the right. The order is from the least to the most secure.

Safety Moment #53: Slug Catchers

The fluids flowing through many pipelines are two phase, i.e., a mixture of liquid and gas. Ideally the two phases separate out with the liquid at the bottom section of the pipe. The two phases flow together to a processing facility that separates the two phases. In practice, however, the two phases often travel at different rates which means that they can form slugs whereby the composition of the stream at different sections is almost all liquid or almost all vapor.

Safety Moment #57: Equipment Spacing (Pumps/Pipe Racks)

Pump seals are a frequent source of leaks in process and energy facilities. Moreover, the discharged liquid will normally be at high pressure, so it can travel a long distance and/or form a spray. Therefore, when laying out a facility it is important to make sure that pumps are located at a safe distance from other equipment and piping. (If the facility is already constructed and in operation it is still useful to consider spacing and layout guidelines.