VALVE CODES & STANDARDS

Codes & Standards Made Easy

In an industry with more codes and standards that any human could possibly memorize—having a handy list of these to reference when searching for a hard-to-find valve can make all the difference.

These codes and standards charts cover material, product dimension, design, examination, inspection, testing, procedure, pressure/temperature ratings and safety.

download-icon
Codes and Standards (381KB)

download-icon
Cross Reference of ASTM Material Specifications (384KB)

download-icon
API 600 Trim Number Chart (385KB)

PRESSURE CLASSES

Pressure classes refer the pressure-temperature operating ratings. The class defines the working pressure range at a specific temperature that a valve is suitable to operate. The ratings provided here are tabulated by material groups.

ASME/ANSI B316.34

  • Based on the American Society of Mechanical Engineers
  • Some Class Examples: Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500
  • Commonly used by the Chemical, Refining and Power industries

CWP (COLD WORKING PRESSURE)

  • CWP is defined as the maximum service pressure permitted in the ambient temperature range -20 to 100F expressed in PSI
  • Some Class Examples: 120CWP, 150CWP, 200CWP, 300CWP, 400CWP, 500CWP, 800CWP
  • Mostly used to categorize Iron, Bronze or Brass valves

WOG (WATER OIL & GAS)

  • WOG is an older standard that does not apply a maximum temperature requirement
  • Some Class Examples: 400WOG, 600WOG, 800WOG, 1000WOG, 2000WOG, 3000WOG

NEED MORE INFORMATION?

From questions about manufacturers to product specs, at Petro-Valve we always have a team of valve specialists ready to assist you.

Fill out my online form.