PHMSA Warning: Unapproved Hazmat Cylinders

Posted on 11/5/2019 by Roger Marks

On Friday, November 1, US DOT PHMSA posted a safety advisory notice warning of unapproved propane cylinders produced by a company called Metal Mate in Thailand. The cylinders bear the DOT specification markings “DOT 4E” or “DOT 4BA”—but the company is not approved by PHMSA to manufacture cylinders. The cylinders can be identified by the company name “Metal Mate” and an “MM” logo stamped into the cylinder collar.  

These cylinders must not be used to transport hazardous materials. DOT states that they may not perform to the DOT performance standards and may not be safe for commercial transportation or consumer use.


The unapproved Metal Mate cylinders have made their way around the globe: PHMSA found two cylinders in Australia marked “DOT 4E 240” which third party testing found may not perform to the DOT 4E standard. Unapproved cylinders were also found in Colombia and DOT believes the company shipped cylinders to Bangladesh and New Zealand.

Read more: What is DOT Specification Packaging?

DOT Hazmat Packaging Requirements

Under the 49 CFR Hazardous Materials Regulations (HMR), cylinders and other packagings designed to transport hazardous materials must meet rigid performance standards (in most cases).

For cylinders, these specifications are found in 49 CFR 178.35—178.75 and regulate every detail of manufacture: the type of materials used, the capacity, service pressure, closures, wall thickness, manufacturing method and more. The regulations also lay out requirements for testing cylinders to ensure they perform to specification.

While foreign manufactures can obtain approval from PHMSA to manufacture cylinders and perform required testing outside of the US, the company in the safety advisory did not get such an approval.

Save Your Seat for 2020 49 CFR, IATA DGR, and IMDG Workshops

Join experienced Lion instructors and develop the in-depth expertise you need to keep hazardous materials moving safely and in compliance—by ground, air, and vessel.

The Complete Multimodal Hazmat Shipper Certification Workshops return to Hartford, Boston, Central Jersey, Philadelphia, Orlando, Charlotte, and Houston in early 2020.
Hartford Jan. 7–10
Boston Jan. 13–16
Central NJ Jan. 13–16
Philadelphia Jan. 21–24
Orlando Feb. 4–7
Charlotte Feb. 18–21
Houston  Mar. 3–6 

Save your seat now or view the 2020 schedule here.

Tags: cylinders, hazmat packaging, hazmat shipping, PHMSA, UN packaging

Find a Post

Compliance Archives

Lion - Quotes

The instructor's energy, enthusiasm, and knowledge of the subject make the class a great learning experience!

Brian Martinez

Warehouse Operator

I can't say enough how pleased I was with this course! Everything finally makes sense.

Kim Graham

Lab Manager

I have over 26 years of environmental compliance experience, and it has been some time since I have attended an environmental regulations workshop. I attended this course as preparation for EHS Audits for my six plants, and it was exactly what I was looking for.

Frank Sizemore

Director of Regulatory Affairs

The instructor kept the class engaged and made learning fun. There was a lot of information to cover but time flew by. I will definitely use Lion in the future!

Chelsea Minguela

Hazmat Shipping Professional

As always, Lion never disappoints

Paul Resley

Environmental Coordinator

This is a very informative training compared to others. It covers everything I expect to learn and even a lot of new things.

Quatama Jackson

Waste Management Professional

Energetic/enthusiastic! Made training enjoyable, understandable and fun!

Amanda Walsh

Hazardous Waste Professional

I can take what I learned in this workshop and apply it to everyday work and relate it to my activities.

Shane Hersh

Materials Handler

Lion was very responsive to my initial questions and the website was user friendly.

Michael Britt

Supply Chain Director

Best course instructor I've ever had. Funny, relatable, engaging; made it interesting and challenged us as the professionals we are.

Amanda Schwartz

Environmental Coordinator

Download Our Latest Whitepaper

In most cases, injuries that occur at work are work-related and must be recorded to maintain compliance with OSHA regulations. This report shows you the 9 types of injuries you don’t record.

Latest Whitepaper

By submitting your phone number, you agree to receive recurring marketing and training text messages. Consent to receive text messages is not required for any purchases. Text STOP at any time to cancel. Message and data rates may apply. View our Terms & Conditions and Privacy Policy.