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Certificate 4337

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.: SU 4337 (Ren. 7)

Certificate Holder: Norris Cylinder Company

Mode of Transport: Road, Rail, Air, Marine

Issue Date: April 10, 2013

Expiry Date: April 30, 2018


This Equivalency Certificate authorizes Norris Cylinder Companyto manufacture, sell, offer for sale, distribute, or deliver in Canada and authorizes any person to handle, offer for transport, transport, or import into Canada, by road or railway vehicle, by aircraft or by ship, cylinders in a manner that does not comply with sections 5.1 and 5.2, subparagraphs 5.10(1)(a)(i) and 5.10(1)(b)(i), paragraph 5.10(1)(c), subparagraph 5.10(1)(d)(i), and subsection 5.10(2) of the Transportation of Dangerous Goods Regulations, if:

Selection and Use

(a) the requirements with respect to specification TC-4BWM cylinders in the Canadian Standards Association standard CSA B340-08, "Selection and use of cylinders, spheres, tubes, and other containers for the transportation of dangerous goods, Class 2", March 2008, are complied with;

Equivalency Certificate

SU 4337 (Ren. 7)



(b) the cylinders are manufactured at 521 Green Cove Road, Huntsville, AL, U.S.A., in accordance with the specific procedures and with drawing No. 5770416-00 filed by Taylor-Wharton, Gas & Fluid Control Group, Harsco Corporation with the Transport Dangerous Goods Directorate;

(c) subject to conditions (d) to (o) of this certificate, the cylinders are in compliance with the applicable requirements for specification TC-4BWM set out in the Canadian Standards Association standard CSA B339-08, "Cylinders, spheres, and tubes for the transportation of dangerous goods", March 2008, cited in the rest of this certificate as CSA B339‑08;

(d) each cylinder is manufactured by spinning of longitudinal electric-resistance- welded (ERW) pipe or tubing. No other longitudinal seams and no circumferential seams are permitted. The cylinder ends are integrally formed;

(e) each cylinder has a water capacity no greater than 5.5 L;

(f) the pipe or tubing used for cylinder manufacture:

(i) complies with the chemical composition specified in Tables 8 and 15 of CSA B339-08,

(ii) is tested in accordance with and meets the requirements of the supplementary requirement S8 in ASTM A513-12, Standard Specification for Electric‑Resistance-Welded Carbon and Alloy Steel Mechanical Tubing, published in 2012, and

(iii) subject to conditions (f)(i) and (f)(ii), complies with:

(A) type E, black finish, in ASTM A53/A53M-12, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated, Welded and Seamless, published in 2012,

(B) ASTM A135-09, Standard Specification for Electric-Resistance‑Welded Steel Pipe, published in 2009, or

(C) ASTM A513-12, Standard Specification for Electric‑Resistance-Welded Carbon and Alloy Steel Mechanical Tubing published in 2012;

Equivalency Certificate

SU 4337 (Ren. 7)


(g) the joint confidence factor of the longitudinal seam (E) is at most 0.85 whether or not any radiographic inspection is performed;

(h) the cylinder bottoms have a minimum thickness not less than two times the minimum design wall thickness when measured within an area bounded by a line representing the points of contact between the cylinder and the floor when the cylinder is in a vertical position;

(i) the minimum design wall thickness is not less than 2.3 mm for cylinders with an outside diameter larger than 155 mm;

(j) the pressure used in performing the test prescribed by Clause 16.8.1 in CSA B339-08 is not less than 3100 kPa;

(k) the pressure used in performing the test prescribed by Clause 16.8.2 in CSA B339-08 is not less than 6200 kPa;

(l) each cylinder complies with the requirements of Clause 4.7 in

CSA B339-08;

(m) the weld tensile test prescribed by Clause 16.10 in CSA B339-08 is performed on a sample taken from each heat of starting material or from a cylinder made from each such heat. The sample or cylinder must have been heat-treated as prescribed;

(n) no repairs are made to longitudinal seams;

(o) the Transport Canada mark, the specification designation, and the service pressure marked on each cylinder is:

"TC-SU 4337-"

followed by the service pressure marked in bar; and

Equivalency Certificate

SU 4337 (Ren. 7)


(p) the certificate holder reports, once per calendar year, a summary of cylinder manufacturing and performance experience to the Director, Regulatory Affairs Branch, Transport Dangerous Goods Directorate, Transport Canada.

This Equivalency Certificate serves as the registration of Norris Cylinder Company pursuant to Clause 25.2 of CSA B339-08, to manufacture cylinders of the designs specified herein. Norris Cylinder Company's registered mark pursuant to CSA B339-08 is "M1120", or

Image in permit

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

SU 4337 (Ren. 7)

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

Contact Person: Jim Wedding

Manager, Product Technology and Quality Assurance

Norris Cylinder Company

521 Green Cove Road

Huntsville, AL 35803


Telephone: 256-650-9151

Facsimile: 256-650-9198


Explanatory Note

This Equivalency Certificate authorizes the manufacture and use of cylinders, made by spin-closing ERW pipe or tubing rather than by longitudinal and circumferential arc welding. Equivalent safety is maintained by restricting the cylinder's water capacity, specifying starting materials and design, and by requiring appropriate quality control tests.

Legend for Certificate Number

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

SU - More than one Mode of Transport

Ren. - Renewal

Equivalency Certificate

SU 4337 (Ren. 7)


Under Canadian Law, a foreign manufacturer of non-specification cylinders cannot be charged with an offence under the Transportation of Dangerous Goods Act, 1992 for failure to comply with the conditions of a Certificate. However, certain remedies under the Act are available to Transport Canada in this eventuality.

These include:

1. detention of dangerous goods and consequently the means of containment containing them (subsection 17(1));

2. detention of the means of containment whether full or empty
(subsection 17(1));

3. directions not to import the means of containment or to return them to origin (subsection 17(3));

4. inspectors' directions (section 19);

5. directions to importers of the means of containment to issue notices of defective construction or recall (subsection 9(2)); and

6. revocation of the certificate, thereby making any use of the means of containment an offence (subsection 31(6)).

If none of the foregoing are adequate, Protective Directions may be issued to prohibit or to control the use of the means of containment (section 32).

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