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Certificate 4781

Downloadable version

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Transport
Canada
Safety and Security

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

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

Equivalency Certificate

Certificate No.: SU 4781 (Ren. 6)

Certificate Holder: Welker, Inc.

Mode of Transport: Road, Rail, Air, Marine

Issue Date: September 25, 2013

Expiry Date: September 30, 2018

CONDITIONS

This Equivalency Certificate authorizes Welker, Inc. to 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 cargo 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) subject to conditions (b) and (c) of this certificate, the requirements applicable to specification TC-3EM cylinders in National Standard of Canada CAN/CSA B340-02, "Selection and Use of Cylinders, Spheres, Tubes, and Other Containers for the Transportation of Dangerous Goods, Class 2", October 2002, as amended in January 2004 and February 2005, cited in the rest of this certificate as CAN/CSA B340-02, are complied with;

Equivalency Certificate

SU 4781 (Ren. 6)

CONDITIONS

(b) the cylinders contain only the following dangerous goods:

Dangerous Goods PIN

AIR, compressed, with not more than UN1002

23.5 per cent oxygen, by volume

Butane UN1011

Carbon dioxide UN1013

Ethane UN1035

Helium, compressed UN1046

Nitrogen, compressed UN1066

Liquefied petroleum gases; UN1075

or Petroleum gases, liquefied

GASOLINE UN1203

Petroleum Crude Oil UN1267

Petroleum Products, n.o.s. UN1268

Compressed gas, Flammable, n.o.s. UN1954

Hydrocarbon gas mixture, COMPRESSED. n.o.s. UN1964

Hydrocarbon gas mixture, liquefied, n.o.s. UN1965

Methane, compressed UN1971

Propane UN1978

Hydrocarbons, liquid, n.o.s. UN3295

(c) despite clause 4.3.7 of CAN/CSA B340-02, the pressure-relief device on the product side of the cylinder may be in direct contact with the liquid phase;

(d) subject to conditions (e) to (t) of this certificate, each cylinder is in compliance with the requirements applicable to Specification TC-3EM set out in National Standard of Canada CAN/CSA B339-02, "Cylinders, Spheres, and Tubes for the Transportation of Dangerous Goods", October 2002, as amended in November 2003 and February 2005, cited in the rest of this certificate as CAN/CSA B339-02;

(e) the cylinder is manufactured in accordance with the procedures, calculations, photographs, sketches, and drawings specified for Model CP‑2‑150cc, CP-2-300cc, CP-2-500cc, CP-2-800cc, or CP-2-1000cc Constant Pressure Sample Cylinders filed in July 1995 by the Welker Engineering Company, with the Regulatory Affairs Branch, Transport Dangerous Goods Directorate, Transport Canada;

Equivalency Certificate

SU 4781 (Ren. 6)

CONDITIONS

(f) the cylinder is a piston-equipped receptacle constructed from seamless stainless steel tubing, with flanged flat head end caps restrained by tie rods. The cylinder is divided into two chambers (pre-charge and product) by means of a floating piston within the cylinder;

(g) the cylinder has an outside diameter of 51 mm, a service gauge pressure of

12.4 MPa, and a length of 168 mm for Model CP-2-150cc, 270 mm for

Model CP-2-300cc, 381 mm for Model CP-2-500cc, 610 mm for Model CP‑2‑800cc, or 677 mm for Model CP-2-1000cc;

(h) all cylinder components are manufactured from Type 316 stainless steel specified in ASTM Standard A213/A213M-08, "Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes, ASTM Standard A240/A240M-08, "Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications", or ASTM Standard A479/A479M-06a, "Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels". The stainless steel is of uniform quality conforming to the chemical composition specified for Grade H Stainless Steel in Tables 5.1 and 5.3 of CAN/CSA B339-02;

(i) the maximum water capacity does not exceed 150 cm3 for Model CP‑2‑150cc cylinders, 300 cm3 for Model CP-2-300cc cylinders, 500 cm3 for Model CP-2-500cc cylinders, 800 cm3 for Model CP-2-800cc cylinders, and 1000 cm3 for Model CP-2-1000cc cylinders;

(j) the cylinder has a minimum sidewall thickness of 2.1 mm;

(k) the openings at each end have flanged flat head end caps restrained by 6 tie rods. The tie rods are secured at each end by nuts or are threaded into one end cap and secured by nuts at the other end. Each tie rod has an outer diameter of 9.5 mm. The threaded ends of the tie rods have 3/8"-16 2A threads with a minor diameter of 7.5 mm, and the length of engagement is no less than 7.9 mm;

(l) each flanged flat head end cap has a thickness of 22.2 mm;

(m) the tube body of the cylinder is designed to burst at a gauge pressure of at least 49.6 MPa;

Equivalency Certificate

SU 4781 (Ren. 6)

CONDITIONS

(n) in addition to the pressure-relief devices required by Clause 4.15 of

CAN/CSA B339-02, the design of the cylinder provides over-pressure protection by allowing for expansion of the cylinder over the o-rings thereby losing seal integrity at gauge pressures greater than 42.0 MPa;

(o) each flanged flat head end cap is equipped with a pressure-relief device. The pressure-relief device is either a rupture disk designed to burst at a gauge pressure of 12.4 MPa ± 0.7 MPa or a pressure relief valve with a set pressure of 12.4 MPa ± 0.7 MPa;

(p) both chambers of each cylinder are tested pneumatically to a gauge pressure of at least 3446 kPa. Cylinders that leak are rejected;

(q) the hydrostatic tests are as follows:

(i) one cylinder, complete but without the piston, from each lot of 500 cylinders or less is hydrostatically tested to failure. The pressure at which the cylinder fails is recorded. The cylinder bursts at a gauge pressure greater than 34.5 MPa without fragmenting or otherwise showing a lack of ductility. The rate of pressurization does not exceed 1.4 MPa per second. Failure of the test cylinder is cause for the rejection of the entire lot, and

(ii) each cylinder, complete but without the piston, is inspected under a test gauge pressure of 24.8 MPa and shows no defect. Cylinders that fail the hydrostatic test are rejected;

(r) the tube body of one cylinder selected from each lot that has passed the tests prescribed in condition (q) of this certificate is flattened to at least 6 times its wall thickness without cracking. The flattening test procedure is in compliance with Clause 4.10 of CAN/CSA B339-02. Failure of the test cylinder is cause for the rejection of the entire lot;

(s) each cylinder is visually reinspected at least once a year for deterioration of seals, scratches, dents, and gouges, in accordance with the manufacturer's guidelines for maintenance, inspection, and cleaning. At this time, the end caps, tie rods, and indicating rods are also thoroughly cleaned with an appropriate solvent recommended by the manufacturer. Cylinders with scratches or pitting that allow for migration of inert gas from one side of the piston to the other are returned to the manufacturer for re-hone and inspection. Cylinders with any damage to the outside shell that may compromise cylinder sidewall thickness as specified in the design are returned to the manufacturer for inspection and dimensional verification;

Equivalency Certificate

SU 4781 (Ren. 6)

CONDITIONS

(t) despite the marks specified in Clause 8.8(a) of CAN/CSA B339-02, the Transport Canada mark, the specification designation, and the service pressure (expressed in bar) marked on each cylinder is:

"TC-SU 4781 - 124"

(u) before the expiry date of this Equivalency Certificate, the certificate holder provides a summary of the 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 Welker, Inc. pursuant to clause 25.2 of CAN/CSA B339-02, to manufacture cylinders of the designs specified herein. Welker, Inc.'s registered mark pursuant to CAN/CSA B339-02, is

WELKER ENG. CO., or

M5701

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.

Chief

Permits and Approvals Division


Equivalency Certificate

SU 4781 (Ren. 6)

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

Contact Person: Kristopher Dusek

Vice President of Engineering

Welker, Inc.

13839 West Bellfort

Sugar Land, TX 77498

Telephone: 281-491-2331

Facsimile: 281-491-8344

E-Mail : kristopher.dusek@welker.com

Explanatory Note

This Equivalency Certificate authorizes the manufacture and use of constant pressure sample cylinders designed for use in the oil and gas industry. The cylinders are piston-equipped receptacles constructed from seamless stainless steel tubing. The applicant demonstrated that when manufactured under the conditions stipulated herein, the cylinders could be used with equivalent safety.

Legend for Certificate Number

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

SU - More than one Mode of Transport

Ren. - Renewal


Equivalency Certificate

SU 4781 (Ren. 6)

NOTE

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 cylinders. (section 32).



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Date modified:
2017-06-19