Understanding Re-qualification Testing Methods For Portable Cylinders Part 1

Roy Williams

The choice of re-qualification testing method for portable cylinders is based on a variety of factors.  In most cases, DOT regulations offer choices.

This 5 part article discusses the different choices when it comes to re-qualification testing methods for portable cylinders. Each part will identify the type of re-qualification testing method and provide a brief description of each. These choices include such methodologies as:

  • Visual Examination Method
  • Hydrostatic Testing Methods
    • Water jacket method
    • Direct expansion method
    • Proof pressure method
  • Acoustic Emission Method
  • Ultrasonic Examination Methods
    • Automated ultrasonic examination
    • Hand-held ultrasonic examination
  • Other Test Methods

Part 1 addresses the Visual Examination Method, Part 2 will address Hydrostatic Testing Methods, Part 3 will address Acoustic Emission Method, Part 4 will address Ultrasonic Examination Methods and Part 5 will address Other Test Methods.

Visual Examination Method for re-qualifying portable cylinders

Visual examination of a cylinder is a part of any re-qualification process and should be performed before applying pressure.  In fact, most cylinders are rejected because of a finding during a visual examination.  The exam may be both internal and external or, in some cases, external only.  Some specification cylinders operating in certain gas services may be re-qualified exclusively by a visual examination.  Pertinent regulations for the specification of cylinder being re-qualified must be carefully reviewed for compliance and selection of the visual examination method appropriate for the cylinder undergoing re-qualification.

The Jay L Harman Fire Equipment team understands your fire fighting and cylinder re-qualification needs and is ready to help

Jay L Harman’s DOT Hydrostatic Testing and Ultrasonic Examination facility and equipment meet all NFPA requirements for the hydrostatic testing and Ultrasonic Examination of compressed gas cylinders and portable fire extinguisher cylinders.

Jay L Harman Fire Equipment Company is your local AMEREX dealer offering the full range of AMEREX Fire Extinguishers, Kitchen Protection systems, Vehicle Systems, Automatic Gas Detection and Industrial Systems.

Jay L Harman is the best and one of the biggest firefighting equipment suppliers and service providers in the region, specializing in fire suppression systems, fire extinguishers, emergency lighting, fire hoses, hydrostatic testing and more. Serving El Paso TX, Las Cruces NM and the surrounding areas, we pride ourselves on buying local and hiring local whenever possible.

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Contact Jay L. Harman Fire Equipment in El Paso TX at 915-533-7021 or Las Cruces NM at 575-523-8880..

Since1925, we have protected businesses throughout the area from the harms and hazards of fires. Every Jay L Harman technician is licensed and regulated by the Texas Department of Insurance State Fire Marshal’s Office.  Each of these technicians continually receives the most up-to-date factory training and certifications by our manufacturers. Contact Jay L Harman Fire Equipment today. Let our friendly and knowledgeable staff tell you more about our fire suppression systems and help you find the ideal fire suppression system for your needs. Learn more about our full offering of fire extinguisher training, firefighting services, firefighting products, request a quote, ask a question or request additional information.