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Certificate 5472

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 5472 (Ren. 2)

Certificate Holder: Weldship Corporation and/or

Texas Trailer Corporation

Mode of Transport: Road, Rail, Marine

Issue Date: June 5, 2012

Expiry Date: June 30, 2017

CONDITIONS

1. This Equivalency Certificate authorizes Weldship Corporation and/or Texas Trailer Corporation to display the marks prescribed for cylinder or tube requalification in a manner that does not comply with section 6 of the Transportation of Dangerous Goods Act, 1992, and authorizes any person to handle, offer for transport or transport, by road or railway vehicle, or by ship, cylinders or tubes in a manner that does not comply with subparagraphs 5.10(1)(a)(i), 5.10(1)(b)(i) and 5.10(1)(d)(i) of the Transportation of Dangerous Goods Regulations, for cylinder and tube requalification only, if:

(a) each cylinder and tube requalification is performed by Weldship Corporation and/or Texas Trailer Corporation, the certificate holders, in accordance with Appendix A to this certificate and at one of the facility locations listed in Appendix B to this certificate;


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

CONDITIONS

(b) each cylinder has one centre opening in each end, a minimum wall thickness of at least 5.6 mm, a water capacity of at least 140 L, a minimum length of at least 3.7 m, an outside diameter of at least 245 mm and has been manufactured in accordance with:

(i) specification TC-3AM or TC-3AAM 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,

(ii) the requirements of the regulations for the transportation of dangerous goods by rail in force before December 5, 1991, and the cylinder has displayed on it the marks, "CRC-3A", "BTC-3A", "CTC-3A", "BTC-3AA" or "CTC-3AA", or

(iii) where the initial test date of the cylinder is December 31, 1992 or earlier, Part 178 of Title 49 of the "Code of Federal Regulations" of the United States, 2006, cited in the rest of this certificate as 49 CFR, and the cylinder has displayed on it the letters "ICC" or "DOT", followed by the specification designation "3A" or "3AA";

(c) each tube has a minimum wall thickness of at least 10.2 mm and has been manufactured in accordance with:

(i) specification TC-3AXM, TC-3AAXM or TC-3TM set out in CAN/CSA B339-02,

(ii) the requirements of the regulations for the transportation of dangerous goods by rail in force before December 5, 1991, and the tube has displayed on it the marks, "CTC-3AX", "CTC-3AAX", "CTC SP 1337" or "CTC/DOT-3T", or

(iii)where the initial test date of the tube is December 31, 1992 or earlier,

49 CFR, and the tube has displayed on it the letters "ICC" or "DOT", followed by the specification designation "3AX", "3AAX" or "3T";

(d) the certificate holders may mark a "+" sign immediately following the requalification date marking on any cylinder manufactured in accordance with condition (b)(ii) or (b)(iii), or tube manufactured in accordance with condition (c)(ii) or (c)(iii), and requalified in accordance with this certificate;


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

CONDITIONS

(e) the requalification period for each cylinder or tube requalified in accordance with this certificate is five years;

(f) where the cylinders or tubes are affixed to a trailer chassis, an exterior cylinder or tube on each side as well as the rear cabinet is marked with the letters and numbers "TC-SU 5472" that are of a colour contrasting with the background and at least 50 mm high; and

(g) the certificate holders reports to the Director, Regulatory Affairs Branch, Transport Dangerous Goods Directorate, Transport Canada:

(i) the name and qualifications of each qualified tester and qualified inspector as defined in Appendix A to this certificate,

(ii) the location of each facility where testing is conducted, and

(iii)once per year, the number of cylinders and tubes tested, their serial numbers and respective owners, and the results of testing.

2. This certificate serves as the registration of Weldship Corporation and Texas Trailer Corporation, in accordance with Clause 25.3 in CAN/CSA B339-02, to requalify cylinders and tubes as specified in this certificate. Weldship Corporation and Texas Trailer Corporation's registered mark is:

"518"

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 not specifically addressed in this certificate.

Signature of Issuing Authority

Original signed by

__________________________

David Lamarche P. Eng., ing.

Chief

Permits and Approvals Division


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

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

Contact Person: Hector Guerrero

Manager Technical Services

Weldship Corporation

225 West Second Street

Bethlehem PA 18015

U.S.A.

Telephone: 610-861-7330 Ext. 24

Facsimile: 610-861-5175

E-mail: hguerrero@weldship.com

Explanatory Note

Weldship Corporation and Texas Trailer Corporation have demonstrated that containers requalified by the acoustic emission test described in Appendix A to the certificate could be used with a level of safety at least equivalent to those requalified by the method required by the regulations. This Equivalency Certificate authorizes continued requalification of containers by Weldship Corporation and Texas Trailer Corporation under the Transportation of Dangerous Goods Regulations.

Legend for Certificate Number

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

SU - More than one Mode of Transport

Ren. - Renewal


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

1. TEST METHOD

Each cylinder or tube shall be visually inspected externally and be subjected to an acoustic emission test and, when required, to a follow-up visual and ultrasonic examination.

1.1 Applicable Standards

CAN/CSA B339-02, Cylinders, Spheres and Tubes for the Transportation of Dangerous Goods, October 2002, as amended in November 2003 and February 2005.

Compressed Gas Association, Inc. publication C-6-2007 entitled, Standards for Visual Inspection of Steel Compressed Gas Cylinders, dated 2007.

CAN/CGSB 48.9712-2006 entitled, Non-destructive Testing - Qualification and Certification of Nondestructive Testing Personnel, dated March 2006.

ASTM E650-97(2007) entitled, Standard Guide for Mounting Piezoelectric Acoustic Emission Sensors, dated 2007.

ASTM A388/A388M-10 entitled, Standard Practice for Ultrasonic Examination of Steel Forgings, dated 2010.

2. VISUAL EXAMINATION

Each cylinder or tube shall be visually inspected externally in accordance with Compressed Gas Association, Inc. publication C-6 entitled, Standards for Visual Inspection of Steel Compressed Gas Cylinders, dated 2007, hereinafter cited as CGA C-6.

3. ACOUSTIC EMISSION TEST

3.1 Scope of test

The entire container under test shall be monitored using two transducers mounted at its extremities. The transducers shall be at the same angular location and approximately 25 mm from the tangent point at the container shoulder.


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

3.2 Transducer coupling

Transducers shall be coupled to the container in accordance with ASTM E650-97(2007) using silicon adhesive. The adhesive shall be allowed to cure for at least 15 minutes.

3.3 System Gain and Threshold

The total system gain shall be set at 80dB or 1 microvolt at the sensing element. The signal processor threshold level shall be set to 32dB or less.

3.4 Calibration

The system shall be calibrated and checked using a signal generated by a pulser or by breaking a pencil lead on the surface of the container. When done by breaking a pencil lead, a Pentel 2H, 0.3 mm diameter, 3 mm long lead shall be used. When done using a pulser, the ultrasonic pulse intensity at one meter from the pulser shall be equal to that of the pencil lead break. Linear location shall be calibrated on each container as specified by the signal processor manufacturer. The sensitivity of each channel shall be checked by generating a calibration signal in proximity to each sensor and ensuring that the measured peak amplitude is greater than 80dB.

3.5 Pressurization

A method shall be provided to continuously read the container pressure. Pressure shall be applied monotonically from zero to 110% of usual settled fill pressure or 110% of service pressure, whichever is greater. Acoustic emissions shall be monitored during pressurization by observing the displays of events versus location. Acoustic emissions shall be recorded starting when container pressure reaches 50% of usual settled fill pressure or

6.9 MPa, whichever is less, and continuing until pressurization is complete.

3.6 Interpretation of Results

The distribution of acoustic emission events versus axial location on each container shall be examined. The container shall be subjected to a follow-up examination, as described in article 3.7 of this appendix, when:


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

(a) five or more acoustic emission events occur on the cylindrical portion of the container within a 200 mm axial segment; or

(b) five or more acoustic emission events detected at both transducers occur on any container end outboard of the transducers.

3.7 Follow-up Examination

Each axial container segment and end, where the rate of acoustic emission meets the criteria described in article 3.6 of this appendix, shall be subjected to a follow-up external visual and ultrasonic examination of its entire surface, including an extension of 457 mm beyond either side of the axial container segment (on the cylindrical portion) or the entire end of the container within 457 mm of the segment, as applicable. The ultrasonic examination shall be performed in accordance with ASTM A388/A388M-10 by personnel certified to Level II or III in accordance with CAN/CGSB 48.9712-2006, or the equivalent, to detect and characterize the flaw. The container shall be rejected where the flaw is found to have a depth greater than or equal to the values specified in Table 1

Table 1 - Flaw Rejection Criteria

Container Specification

Outside Diameter

(mm)

Rejection Flaw Depth

(mm)

TC-3AM

TC-3AAM

245

1.7

TC-3AXM

559

2.5

TC-3AAXM

356

1.5

TC-3AAXM

457

559

2.5

2.5

TC-3AAXM with a service pressure range from

12.4 to 16.5 MPa

559

2.3

TC-3TM

559

2.5

TC-3TM with a service pressure range from

12.4 to 16.5 MPa

559

1.8


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

4. REJECTED CONTAINERS

Rejected containers may be repaired by removal of the defect and verification of container strength by wall thickness measurement. If satisfactory, the container shall then be retested by the full procedure described in this certificate.

5. EXAMINATION RECORDS

A report shall be prepared documenting the test conditions, parameters and results including:

(a) the container's specification or certificate number, its service pressure and usual fill pressure;

(b) container size and shape;

(c) container serial number;

(d) container owner/operator;

(e) test location;

(f) test date;

(g) test parameters, including:

(i) sensor specifications,

(ii) couplant used,

(iii) sensor locations,

(iv) pressurization schedule, and

(v) pressurization medium;

(h) visual examination results;


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

(i) acoustic emission test result, including:

(i) measured acoustic emission events as a function of pressure and location,

(ii) location of any areas of emission on containers where the rate of emission exceeds that specified in article 3.6, and

(iii) reports of any visual or ultrasonic examinations carried out at areas of emission on containers where the rate of emission exceeds that specified in article 3.6;

(j) a statement as to whether the container is acceptable for service; and

(k) the name and signature of the qualified inspector who performed or supervised the test.

6. MARKING

6.1 Subject to article 6.2, each cylinder and tube requalified according to this certificate shall be marked in accordance with Clause 24.6 of CAN/CSA B339-02. The procedure symbol shall be "AE".

6.2 As an alternative to marking each container in accordance with article 6.1, where the cylinders or tubes are affixed to a trailer chassis and tested as a unit,

(i) a permanent record containing the markings specified in article 6.1, the serial number of each cylinder or tube tested, the signature of the qualified inspector who performed or supervised the tests, and the certificate number shall be carried aboard the vehicle used to transport the cylinders or tubes covered by this certificate; or

(ii) the marking specified in article 6.1, the serial number of each cylinder or tube tested, and the certificate number shall be marked on a dataplate affixed to the vehicle or frame used to transport the cylinders or tubes.


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX A

6.3 When a cylinder or tube is required to be condemned, the specification designation and service pressure markings shall be removed (e.g. by peening out or stamping over with a series of Xs), or the word "CONDEMNED" shall be permanently and legibly stamped on the shoulder, top end, or neck.

7. ACOUSTIC EMISSION TEST PERSONNEL

7.1 Testing shall be carried out by a qualified inspector or under the general supervision of a qualified inspector by a qualified tester.

7.2 A qualified inspector shall be a person who:

(a) holds a post secondary degree in a relevant field of engineering or science;

(b) has at least five years continuous experience in:

(i) design, fabrication, maintenance, testing and inspection of cylinders, tubes or other pressure containers,

(ii) design, fabrication and maintenance of acoustic emission test equipment,

(iii) development and formulation of acoustic emission test procedures, or

(iv) metallurgy or nondestructive testing of pressure containers; and

(c) has at least 50 hours experience in acoustic emission testing of steel pressure containers.

7.3 A qualified tester shall be a person who has at least:

(a) 40 hours training or instruction in acoustic emission testing of cylinders, tubes or other pressure containers;

(b) five continuous years experience of a technical nature involving cylinders or tubes or completed at least 10 semester hours of a scientific or technical curriculum and has at least two years continuous experience of a technical nature involving cylinders or tubes; and

(c) 80 hours experience in acoustic emission testing of cylinders and tubes under the direct personal supervision of a qualified inspector.


Issue Date: June 5, 2012

Equivalency Certificate

SU 5472 (Ren. 2)

APPENDIX B

Test Facilities

Weldship Corporation

225 West Second Street

Bethlehem PA 18015-1250

U.S.A.

Telephone: 610-861-7330

Texas Trailer Corporation

1310 Highway 82 West

Gainesville TX 76240

U.S.A.

Telephone: 940-668-1777



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Date modified:
2017-06-19