Understanding Pressure Gauge Standards and Specifications: A Guide to Choosing the Right Instrument for Your Needs

Pressure gauges are essential instruments used in numerous industries and applications. Their role is to indicate and monitor the pressure of liquids and gases, providing vital information on security, efficiency, and reliability in processes and systems. 

Thus, two major factors are often considered when selecting them: the pressure standard used for the gauge and the specifications of the pressure gauge.

This comprehensive guide aims to simplify the process by explaining these factors, their applications, and which company to connect with when choosing the right meter.

Which Pressure Standard is Used for Gauge

Here’s a detailed description of the pressure standards used for gauges:

ASME B40.100-2022: 

This standard applies to analog, dial-type pressure meters and their attachments. It specifies how these gauges mechanically measure pressure and display it on a graduated scale.

EN 837: 

This European National Standard targets Bourdon tube pressure gauges, outlining requirements for scale ranges, nominal sizes, and accuracy classes.

Scope and Relevance

The EU’s Pressure Equipment Directive (PED) 2014/68/EU establishes specifications for the design and manufacture of pressure equipment (which includes steam boilers, pressure vessels, piping, safety valves, and other parts subjected to pressure loading with a volume over one liter and an upper pressure greater than 0.5 bar gauge). 

It also provides the administrative framework for the “conformity assessment” of pressure equipment, facilitating market access to the European market without local legislative barriers. 

This directive has been in effect throughout the EU since May 30, 2002, with the 2014 amendment becoming fully effective on July 19, 2016. Pressure vessel and boiler safety norms and regulations are also very similar to those established by the American Society of Mechanical Engineers (ASME) in the United States.  

This alignment enables most international inspection organizations to offer verification and certification services to ensure compliance with a range of pressure equipment directives. 

Pressure vessel manufacturers indicate that PED does not require a pre-manufacturing permit/certificate/stamp, while ASME does.

Essential Pressure Gauge Specifications

Pressure Range:

Choose a gauge whose range is at least twice the normal operating pressure to prevent overpressure damage.

Units: 

Ensure that the meter displays the appropriate units (e.g., PSI, bar, kPa).

Types of Pressure

Consider whether you need a measuring device for gauge pressure (relative to atmospheric pressure), absolute pressure (relative to a vacuum), or differential pressure (the difference between two pressures).

Specialty Applications: 

Gauges for high pressures (for example, up to 87,000 psi) or specialized applications like espresso machines.

Accuracy:

Accuracy Class: This describes the allowable deviation of the display as a percentage of the full-scale value.

Material

Options include plastic, chrome steel, or stainless steel, each with varying durability and accuracy.

Dial Material

Choose materials like stainless steel or aluminum for durability and readability.

Wetted Parts

Parts that contact the fluid being measured should be compatible with the liquid to prevent corrosion or contamination.

Environmental Conditions:

Temperature: 

Consider the temperature range the gauge will endure and select materials accordingly.

Vibration: 

Choose a meter capable of withstanding vibrations in the application.

Corrosion: 

If the environment is corrosive, select a gauge made of corrosion-resistant materials.

Liquid-filled vs. Dry: 

Liquid-filled gauges can protect the internal mechanism from vibration and temperature changes.

How Aims Control Can Assist You

Expertise in Pressure Measurement

Aims Control offers a broad range of pressure gauges designed to meet industry specifications. Our lineup includes analog and digital meters, differential pressure instruments, and specialty gauges for unique applications, providing accurate and reliable readings.

Customized Solutions

We understand that every industry has distinct needs. Aims Control delivers tailored pressure measurement solutions, including custom calibration ranges, specialty materials, and industry-specific designs to ensure optimal performance for your application.

Commitment to Quality and Compliance

Quality and safety are core values of our company. Our products comply with international standards like ISO, ASME, and ANSI, ensuring accuracy and durability. Every gauge undergoes thorough testing to guarantee high accuracy and reliability.

Requesting a Quote – A Simple Process

Obtaining a quote from Aims Control is straightforward and fast:

Explore Our Products – Choose the appropriate pressure gauge for your application.

Share Your Needs – Specify your pressure range, type, and customization requirements.

Submit Your Inquiry – Complete our online form or call our team directly.

Get a Quote – Receive a quick estimate with pricing and availability.

Conclusion

Choosing the right pressure gauge is critically important for accurate pressure measurement and the safety and effectiveness of your processes or systems. By understanding the various types of meters, their features uses, and key considerations, you can make an informed decision.

Need assistance in selecting the right pressure gauge for your requirements? Don’t hesitate to contact Aims Control. We are more than happy to help you make informed choices and see your projects succeed!