A large blue truck is parked on a paved area, carrying multiple rows of cylindrical gas tanks. The tanks are arranged in two distinct sections: one with silver cylinders and another with brown ones, both secured in metal frames. A green hazard sign is visible on the side, indicating the cargo's nature. Lush trees and a clear blue sky provide a vibrant backdrop.

Department of Transportation (DOT) and Transport Canada (TC)

compliance made simple

Expert design approval, inspection and certification for cylinders, cargo tanks, and MEGCs

Trust HSB with your DOT/TC approvals

An essential step in transporting hazardous materials across the United States and Canada is ensuring you have the right certifications for the cylinders and tanks. HSB is a Designated Approval Agency (DAA) and Independent Inspection Agency (IIA) authorized by the U.S. DOT and Independent Inspectors for Transport Canada. We support manufacturers with design reviews, audits, inspection, and certification for pressure vessels — including cylinders, cargo tanks, and multiple-element gas containers (MEGCs).

A central circle labeled "Transportable vessels" features illustrations of various containers, surrounded by icons representing different transport regulations: ADR (road), RID (rail), Maritime (water), and DOT/TC (land). An orange section highlights DOT/TC, indicating its significance in transport safety. The design emphasizes interconnectedness in hazardous materials transport.

Inspection and certification for U.S. and Canadian standards

Whether you’re producing new cylinders, retesting existing equipment, or preparing for DOT or TC audits, HSB delivers the guidance and approvals you need. Our team ensures, upon receipt of certification, compliance with 49 CFR, CSA B339, and IMDG Part 6.7 requirements, reducing risk while maintaining quality and regulatory alignment.

Complete DOT/TC inspection, certification, and retesting services

HSB provides end-to-end support for DOT and Transport Canada compliance:

Design review and Quality Program evaluation
Prototype testing and manufacturer pre-surveys
Facility certification and fitness inspections
Manufacturing inspection and ongoing quality checks
Cylinder retesting and RIN approval for requalifiers
Support for UN/ISO portable tanks and cargo tank inspections
IMDG and CSC compliance for intermodal transport

Learn more about our DOT/TC services

Download

Manufacturing of DOT/TC (Cylinders, UN Portables, Cargo Tanks, and MEGSs) - English

PDF, 1 MB

Webinar

HSB and UN Portable Tanks

Global capabilities that deliver confidence

30+

Years of experience

Trusted global authority in pressure equipment inspection and certification.

20+

Countries served

On-the-ground support from local experts who understand regional regulations.

9

Major standards

One provider for CDG, ADR, RID, TPED, TPE, DOT, TC, IMDG, CSC, TIR, and customs seals.

Certify with confidence

Utilize HSB’s experience and expertise to help simplify approval processes for U.S. and Canadian regulations. Let our experts handle the complexity so you can stay focused on your operations.

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CDG (ADR, RID, ADN, IMDG)

TPED

UK-TPE

US DOT

Transport Canada

CSC

Offshore (MSC Circ.860)

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Global Inspection and Engineering Services: Inspection Hotline

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Phone 1-800-417-3421

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