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Certificate 10846

Downloadable version

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Safety and Security

Transport Dangerous
Goods Directorate
330 Sparks Street
Ottawa, Ontario K1A 0N5
Sécurité et sûreté

Direction générale du
transport des marchandises dangereuses
330, rue Sparks
Ottawa (Ontario) K1A 0N5

Equivalency Certificate

Certificate No.: SH 10846

Certificate Holder: Enbridge Gas Distribution Inc.

Mode of Transport: Road

Issue Date: March 12, 2013

Expiry Date: March 31, 2018


This Equivalency Certificate authorizes Enbridge Gas Distribution Inc.,

to handle, offer for transport, or transport, by road vehicle, dangerous goods that are METHANE, COMPRESSED; or NATURAL GAS, COMPRESSED, with high methane content, Class 2.1, UN1971, in cylinders, in a manner that does not comply with subparagraph 5.10(1)(a)(i) of the Transportation of Dangerous Goods Regulations, if:

(a) subject to condition (b) to (l) of this certificate, the requirements applicable to TC-3AAM specification cylinders, or equivalent containers, set out in CSA Standard B340-08, "Selection and use of cylinders, spheres, tubes, and other containers for the transportation of dangerous goods, Class 2", March 2008, cited in the rest of this certificate as CSA B340‑08, are complied with;

(b) the dangerous goods are contained in a total of sixteen manifolded cylinders that are mounted horizontally on a road vehicle in accordance with Enbridge Gas Distribution Inc.'s drawing CNG VEHICLE - 001 dated 11 February 2013;

Equivalency Certificate

SH 10846

(c) each cylinder is equipped with an individual valve;

(d) despite Clause 4.4.7 of CSA B340-08, the individual shut-off valves are not closed during transportation;

(e) the cylinders are divided into four groups where each group is isolated by a shut-off valve that is closed during transport;

(f) a separate vent line is used for each 8-cylinder bundle of joined cylinders and is sized such that the flow capacity requirements specified for pressure-relief devices on individual cylinders in CGA S-1.1-2007, "Pressure-Relief Device Standards - Part 1 - Cylinders for Compressed Gases", Ninth Edition, published by the Compressed Gas Association, Inc., are met in the event that all 8 pressure-relief devices were to vent at the same time;

(g) the valves, pressure-relief devices, and the manifold are protected from damage during an accident, including protection from a front, rear, or side impact or rollover;

(h) the cylinders are attached to the truck bed such they will withstand the static, dynamic, and thermal loads found during normal conditions of handling and transport without loss of contents;

(i) metal-to-metal contact between the cylinders and the cylinder support structure is prevented;

(j) the cargo space is vented to the outside;

(k) during transportation, the cylinders are kept away from open flame and other sources of direct heat or ignition;

(l) the vehicle used to transport the cylinders carries one or more dry chemical fire extinguishers conforming to National Standard of Canada CAN/ULC-S504-12, "Standard for Dry Chemical Fire Extinguishers", 2012 Edition, published by the Underwriters Laboratories of Canada, with a combined total effective rating of 10-B,C or more. Each fire extinguisher must be recharged immediately after each use and must be inspected and marked annually in accordance with NFPA 10, "Standard for Portable Fire Extinguishers", 2013 Edition, published by the National Fire Protection Association; and

Equivalency Certificate

SH 10846

(m) the shipping document that accompanies the dangerous goods includes the following information:

"Equivalency Certificate No. SH 10846"

Note: The issuance of this Equivalency Certificate in no way reduces the certificate holder's responsibility to comply with any other requirements of the Transportation of Dangerous Goods Regulations, the Technical Instructions for the Safe Transportation of Dangerous Goods by Air, the International Maritime Dangerous Goods Code, and the Canadian Aviation Regulationsnot specifically addressed in this certificate.

Signature of Issuing Authority


David Lamarche P. Eng., ing.


Permits and Approvals Division

Equivalency Certificate

SH 10846

(The following is for information purposes only and is not part of the certificate.)

Contact Person: Robin Yu

Engineering Project Manager

Engineering Special Projects and Distribution Technology

Enbridge Gas Distribution Inc.

500 Consumers Road

North York, ON M2J 1P8

Telephone: 416-495-5265

Facsimile: 416-495-5523


Explanatory Note

This Equivalency Certificate authorizes the transport of METHANE, COMPRESSED; or NATURAL GAS, COMPRESSED, with high methane content, Class 2.1, UN1971 in manifolded cylinders without each individual shut-off valve being closed. The new CSA Standard B342-09 on the selection and use of UN pressure receptacles, which has been published and will soon be adopted into the Transportation of Dangerous Goods Regulations, will allow this practice. The certificate holder has demonstrated that when transported under the conditions stipulated herein, the cylinders could be transported with an equivalent level of safety.

Legend for Certificate Number

SH - Road, SR - Rail, SA - Air, SM - Marine

SU - More than one Mode of Transport

Ren. - Renewal

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