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Certificate 6078

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

(Approval issued by the competent authority of Canada)

Certificate No.: SU 6078 (REN 5)

Certificate Holder: Air Liquide Canada Inc.

Mode of Transport: Air, Marine, Rail, Road

Issue Date: 2017-02-23

Expiry Date: 2022-02-28

CONDITIONS

1. This Equivalency Certificate authorizes Air Liquide Canada Inc., to display the marks prescribed in respect of cylinder 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, by aircraft or by ship, cylinders in a manner that does not comply with subsection 5.1(2), section 5.2, subparagraphs 5.10(1)(a)(ii), 5.10(1)(b)(iii), 5.10(1)(c)(ii), and 5.10(1)(d)(iii) of the Transportation of Dangerous Goods Regulations in respect of cylinder requalification only, if:

(a) each cylinder requalification is performed by Air Liquide Canada Inc., at the facility located at 2906 Marleau Avenue, Cornwall, ON, hereinafter referred to as the equivalency certificate holder, and is performed in accordance with the documentation filed by the equivalency certificate holder with the Transportation of Dangerous Goods Directorate and in accordance with Appendix A to this certificate;

(b) subject to condition (c) of this certificate, each time the valve is removed, the cylinder is subjected to an internal visual inspection, including an inspection of the neck threads, in accordance with CGA C-6-2007, "Standards for Visual Inspection of Steel Compressed Gas Cylinders", Tenth Edition, published by the Compressed Gas Association, Inc. (CGA), cited in the rest of this certificate as CGA C-6-2007, or CGA C-6.1-2006, "Standards for Visual Inspection of High Pressure Aluminum Compressed Gas Cylinders", Fifth Edition, published by the

Compressed Gas Association, Inc. (CGA), cited in the rest of this certificate as CGA C-6.1-2006;

(c) the internal visual inspection of aluminum cylinders may be limited to the neck region, including the neck threads, as specified in Appendix A to this certificate;

(d) each cylinder has been manufactured in accordance with:

(i) specification TC-3AM or TC-3AAM set out in CSA Standard 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,

(ii) specification TC-3ANM or TC-3ALM set out in CSA B339-08,

(iii) 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 letters "CRC", "BTC", or "CTC", followed by the letters "3AN" or "3AL",

(iv) 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 letters "CRC", "BTC", or "CTC", followed by the letters "3A" or "3AA",

(v) 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, and the cylinder has displayed on it the letters "ICC" or "DOT", followed by the letters "3A" or "3AA",

(vi) 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, and the cylinder has displayed on it the letters "ICC" or "DOT", followed by the letters "3AN" or "3AL",

(vii) one of the following Equivalency Certificates, Permits for Equivalent Level of Safety, or Special Permits issued by the Transportation of Dangerous Good Directorate, Transport Canada: SU 4210, SU 4221, SU 4292, SU 4349, SU 4366, SU 4369, SU 4552, SU 4626, SU 4957, SU 7694, or SP 3263-15C, or

(viii) Special Permit 1897, issued under the Regulations for the Transportation of Dangerous Goods by Rail in force before December 5, 1991;

(e) the equivalency certificate holder marks the letter "K" immediately following the service pressure marking on any cylinder that was manufactured in accordance with conditions (d)(i) or (d)(vii) of this certificate, that is requalified in accordance with this certificate, and for which the maximum wall stress exceeds the corresponding wall stress limitation specified in Appendix B of Compressed Gas Association Inc. Publication C-5, "Wall Stress Requalification Criteria for High Pressure Seamless Steel Cylinders", dated 2005, cited in the rest of this certificate as CGA C-5-2005;

(f) the equivalency certificate holder may mark a "+" sign immediately following the requalification date marking on any cylinder that was manufactured in accordance with conditions (d)(iv), (d)(v), or (d)(viii) of this certificate, that is requalified in accordance with this certificate, and for which the maximum wall stress does not exceed the corresponding wall stress limitation specified in Appendix B of CGA C-5-2005;

(g) subject to condition (h) of this certificate, the requalification period for each cylinder requalified in accordance with this certificate is five years;

(h) the requalification period for each cylinder requalified in accordance with this certificate and meeting the requirements of Clause 24.2.2.1, except for item (c), of CSA B339-08, is 10 years;

(i) cylinders with evidence of having been subjected to the action of fire are not requalified under this certificate;

(j) aluminum cylinders exposed to a temperature exceeding 175°C are condemned; and

(k) for each facility, the equivalency certificate holder reports to the Director, Regulatory Affairs Branch, Transportation of Dangerous Goods Directorate, Transport Canada:

(i) the name and qualifications of each Senior Review Technologist (SRT), qualified tester, and qualified operator, as defined in Appendix A to this certificate, and

(ii) once per six calendar months, the number of cylinders examined, the specification designation, or the Equivalency Certificate, Permit for Equivalent Level of Safety, or Special Permit under which each cylinder was manufactured, their serial numbers and respective owners, and the requalification results.

2. This Equivalency Certificate serves as the registration of Air Liquide Canada Inc., in accordance with Clause 25.3 of CSA B339-08, to requalify cylinders as specified herein. The registered mark of Air Liquide Canada Inc.'s facility located at 2906 Marleau Avenue, Cornwall, ON shall be "490" or for requalifications performed prior to January 2015, "541".

Note: Prior to March 2016, cylinders may have also been requalified in accordance with this Equivalency Certificate at Air Liquide Canada Inc.'s facility located at 10020 - 56 Avenue, Edmonton, AB. The registered mark for this facility was "135" or for requalifications performed prior to January 2015, "541".

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

Image in permit

David Lamarche

Chief

Permits and Approvals division


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

Contact Person:

Nancy Brochu

Manager, Industrial Risk Management

Cylinder Operations

Air Liquide Canada Inc.

1250 RENÉ-LÉVESQUE BOUL West Unit 1700
MONTREAL Quebec
H3B5E6 Canada

Telephone:

514-846-7736

Fax:

514-846-3930

E-mail:

nancy.brochu@airliquide.com

Explanatory Note

The equivalency certificate holder has demonstrated that cylinders requalified by the ultrasonic examination method described in Appendix A to this certificate could be used with a level of safety at least equivalent to those requalified by methods (hydrostatic testing and internal visual inspection) required by 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

APPENDIX A

1. REQUALIFICATION METHOD

Each cylinder shall be visually inspected externally and be subjected to an ultrasonic examination (UE) and, when required, to a follow-up non-destructive examination. For TC-3ALM and CTC-3AL aluminum cylinders, the valve shall be removed and an inspection of the cylinder neck region, including the neck threads, shall be performed. In addition, for CTC-3AL aluminum cylinders manufactured from the alloy 6351 used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), and oxygen services, examination of the cylinder neck region, including the neck threads, for sustained load cracking (SLC) by the use of an eddy current device shall be performed.

1.1 Applicable Standards

CSA B339-08, Cylinders, spheres, and tubes for the transportation of dangerous goods, March 2008 (CSA B339-08).

Compressed Gas Association Inc. (CGA) Publication C-5-2005, Wall Stress Requalification Criteria for High Pressure Seamless Steel Cylinders, dated 2005 (CGA C-5-2005).

Compressed Gas Association Inc. (CGA) Publication C-6-2007, Standards for Visual Inspection of Steel Compressed Gas Cylinders, dated 2007 (CGA C 6 2007).

Compressed Gas Association Inc. (CGA) Publication C-6.1-2006, Standards for Visual Inspection of High Pressure Aluminum Compressed Gas Cylinders, dated 2006 (CGA C-6.1-2006).

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

ASTM E1316-08, Standard Terminology for Nondestructive Examinations,

dated 2008.

ASTM E213-04, Standard Practice for Ultrasonic Examination of Metal Pipe and Tubing, dated 2008 (ASTM E213-04).

ASNT SNT-TC-1A, Recommended Practice No. SNT-TC-1A - Non Destructive Testing, dated 2006 (SNT-TC-1A-2006).

ANSI/ASNT CP-189-2006, ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel, dated 2006 (ANSI/ASNT CP-189-2006)

ISO 9712:2005, Non-destructive testing - Qualification and certification of personnel (ISO 9712:2005)

2. EXTERNAL VISUAL INSPECTION

Each cylinder shall be visually inspected externally in accordance with CGA C-6-2007 or CGA C-6.1-2006, as applicable.

3. INTERNAL VISUAL INSPECTION

Each TC-3ALM and CTC-3AL cylinder shall be subjected to an inspection of the neck threads, including the transition area from the shoulder to the neck, in accordance with CGA C-6.1-2006.

4. EDDY CURRENT EXAMINATION WITH VISUAL INSPECTION

4.1 Scope of Examination

In addition to the requirements in section 3 of this appendix, CTC-3AL cylinders manufactured from aluminum alloy 6351 used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), and oxygen services, shall be subjected to an examination of the cylinder neck for sustained load cracking (SLC) by the use of an eddy current device. The cylinder neck shall be examined in accordance with section 4 of this appendix. Any eddy current indication of a feature shall be visually verified. Any cylinder with a crack verified visually shall be condemned. Any cylinder with a fold in the shoulder area extending into more than one continuous full neck thread shall be condemned.

4.1.1 Examination Procedure

Each facility performing eddy current examination with visual inspection shall develop, update, and maintain a written examination procedure applicable to the test equipment it uses to perform eddy current examinations.

4.1.2 Visual examinations

Visual examinations of the neck and shoulder area of the cylinder shall be conducted in accordance with CGA Publication C-6.1-2006.

4.1.3 Eddy Current Equipment

A reference ring and probe for each CTC-3AL cylinder thread manufactured of aluminum alloy 6351 to be examined shall be available at the examination facility. Eddy current equipment shall be capable of accurately detecting the notches on the standard reference ring.

4.1.4 Eddy Current Reference Ring

The reference ring shall be produced to represent each cylinder thread size to be examined. The reference ring shall include artificial notches to simulate a neck crack. The size of the artificial notch (depth and length) shall have a depth less than or equal to 1⁄3 of the wall thickness of the neck and a length greater than or equal to two threads. The standard reference shall have a drawing that includes the diameter of the ring, and depth and length of each notch.

4.1.5 Condemnation Criteria

A cylinder shall be condemned if the eddy current examination combined with visual examination reveals any crack in the neck or shoulder area. A cylinder with folds that enter into more than one continuous full neck thread shall be condemned.

4.1.6. Examination equipment records

Records of eddy current examination equipment shall contain the following information:

(a) Equipment manufacturer, model number, and serial number; and

(b) Probe description and unique identification (e.g. serial number and part number).

4.1.7 Eddy current examination reporting and record retention requirements

Daily records of eddy current examinations shall be maintained by the person who performs the requalification. These records shall be made available for inspection by a representative of Transport Canada on request. Eddy current examination records shall contain the following information:

(a) Specification of each standard reference ring used to perform the eddy current examination;

(b) Specification, Equivalency Certificate, Permit for Equivalent Level of Safety, or Special Permit number of the cylinder; manufacturer's name or symbol; owner's name or symbol, if present; serial number; and, date of manufacture;

(c) Name of person performing the eddy current examination;

(d) Date of eddy current examination;

(e) Acceptance/condemnation results (i.e., pass or fail); and

(f) Requalifier's registered mark.

4.1.8 Personnel Qualification Requirements

Each person who performs eddy current and visual examinations, and evaluates and certifies retest results, shall be certified by the employer that he/she has been properly trained and tested in the eddy current and visual examination procedures.

4.1.9 Training Records

A record of eddy current training must be maintained for each employee who performs eddy current and visual examinations.

5. ULTRASONIC EXAMINATION

5.1 Scope of Examination

Each cylinder shall be examined using ultrasonic straight-beam and shear angle-beam waves so that 100% of the cylindrical section of the cylinder is examined. The coverage shall extend at least 76.2 mm (3 in.) into the sidewall-to-base transition area, where the sidewall-to-base transition actually occupies such distance.

5.2 Ultrasonic Examination System

The UE examination system shall be in accordance with the Nordco "RTS300 Ultrasonic Cylinder Inspection System" and shall incorporate nine transducer data channels contained in a single wheel probe arranged to perform straight and angle beam examinations. One additional data channel shall be used for detection of lack-of-expected-response (LER) due to a lack of coupling between the wheel probe and the cylinder and for echo-following control. The ultrasonic sound pulses shall enter into the cylinder wall in both longitudinal (opposing) directions, both circumferential (opposing) directions, in four X configured oblique directions (opposing and perpendicular), as well as normal to the cylinder wall to

ensure 100 percent coverage of the cylinder wall. All defects such as, but not limited to generalized wall thinning, isolated pits, line corrosion, cracks, and folds shall be detected. The wheel probe and cylinder shall be arranged so that the ultrasonic beams enter into the cylinder wall and measure thickness and detect both sidewall and sidewall-to-base (SBT) area flaws. The wheel immersion UE system shall use high-speed signal processing to convert the A-scan signals to C-scan, thickness scan, and detection count data during examination of the cylinder. Search units shall be able to resolve the thickness measurements and detect all flaws. A manual contact shear or longitudinal search unit may be used for confirmation and sizing of an indicated defect. If manual UE is used, it shall be performed by a Level II operator (qualified tester) or a Senior Review Technologist (SRT) and in accordance with ASTM E213-04.

5.3 Ultrasonic Examination System Calibration

5.3.1 Calibration of the ultrasonic examination system shall be performed at the beginning of each work shift (cal-in), when the cylinder under examination has dimensions that exceed the allowable ranges of the calibration cylinder, when there is a change of operator(s), if any equipment that affects the UE results are replaced or altered (such as but not limited to a search unit or coaxial cable), or if a loss of power occurs, and at the end of each work shift (cal-out). Additionally, UE system calibration (cal-out) shall be performed after the examination of 200 cylinders or four (4) hours, whichever occurs first. This cal-out may be considered the cal-in for the next examination interval during continuous operation. Cylinders examined during the interval between cal-in and cal-out shall be quarantined until an acceptable cal-out has been performed. A cal-out shall be deemed acceptable when the calibration cylinder is examined and all required features are revealed without changing examination settings. If an acceptable cal-out does not occur, all cylinders examined since the last successful calibration shall be re-examined. Calibration of the UE system shall be performed by a Level II operator (qualified tester) or a Senior Review Technologist (SRT).

5.3.2 Prior to examining a cylinder, the cylinder's specification designation, or the Equivalency Certificate, Permit for Equivalent Level of Safety, or Special Permit under which it was manufactured shall be identified. The UE system shall be calibrated for examining the identified cylinder by using a calibration cylinder. Calibration of the UE system shall be performed by using a relevant calibration cylinder that is described in section 5.3.3 of this appendix.

A calibration cylinder with a machined simulated defect made to represent area corrosion (minimum wall thickness measurement) shall be placed in the UE system. The UE system shall be calibrated to indicate rejection for an area equal to or greater than the machined surface for the relevant specification of cylinder (see section 5.3.3 of this appendix for flaw sizes by specification). Prior to machining this defect, the average wall thickness of the calibration cylinder shall

be determined by means of an independent method using a mechanical measuring device combined with a precision ultrasonic thickness gauge. Where the wall thickness is reduced below the minimum design wall thickness (td), a straight ultrasound beam (longitudinal) shall be used to measure the wall thickness of the machined area.

If a calibration cylinder with a machined flat-bottom hole (FBH) made to represent an isolated pit is placed in the UE system, the FBH shall be detected by all four oblique shear wave beams that strike the FBH from opposite and perpendicular sides. The UE gain shall be increased until the signal from the FBH is maximized at 60% of the calibrated screen height (reference threshold).

A calibration cylinder with machined notches to represent circumferential sidewall flaws shall be placed in the UE system. The notches shall be detected by the system with a minimum of two (2) shear wave beams, except for the sidewall-to-base (SBT) notch in steel and nickel cylinders that may be detected by the system with a minimum of one (1) shear wave beam. The UE gain shall be increased until the signal from the notches is maximized at 60% of the calibrated screen height (reference threshold).

A calibration cylinder with machined notches to represent longitudinal sidewall flaws shall be placed in the UE system. The notches shall be detected by the system by a minimum of two (2) shear wave beams. The UE gain shall be increased until the signal from the notches is maximized at 60% of the calibrated screen height (reference threshold).

5.3.3 The calibration cylinders shall be a representative set of cylinders with machined defects. The outside diameter of the calibration cylinder used to calibrate the system shall be equal to or less than that of the cylinders to be examined. The calibration cylinder shall have similar acoustic properties, surface finish, and metallurgical condition as the cylinders to be examined. Also, the calibration cylinder shall have a known minimum design wall thickness (td) that is less than or equal to that of the cylinders being examined.

For steel and aluminum specification cylinders, the machined defects shall be in accordance with Table 1 or Table 2 of this appendix, except that aluminum cylinders shall not require a simulated defect for line corrosion in the sidewall-to-base transition area on the inner surface (SBT).

For steel and aluminum specification cylinders in Class 2.3 gas service, the machined defects shall be in accordance with Table 1 and the UE gain shall be increased by 6 dB after the system has been initially calibrated to establish the reference threshold specified in section 5.3.2 of this appendix.

APPENDIX A

Table 1

Description of Machined Defect and Notation Symbol

Length

Width

Depth

Orientation

Simulated defect for reduction in wall thickness (area corrosion) on inner surface (MWP)

25.4 mm

(1 in.)

12.7 mm (0.5 in.)

remaining wall thickness (below defect) is equal to td

N/A

Simulated defect for line corrosion in the sidewall-to-base transition area on inner surface (SBT)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for longitudinal sidewall crack on inner surface (L1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Longitudinal

Simulated defect for longitudinal sidewall crack on outer surface (L2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Longitudinal

Simulated defect for circumferential sidewall crack on inner surface (T1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for circumferential sidewall crack on outer surface (T2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for an isolated pit on inner surface (FBH)

diameter less than or equal to 2 times td

1/3 of td

N/A

td -minimum design wall thickness

APPENDIX A

Table 2

Description of Machined Defect and Notation Symbol

Length

Width

Depth

Orientation

Simulated defect for reduction in wall thickness (area corrosion) on inner surface (MWP)

25.4 mm

(1 in.)

12.7 mm (0.5 in.)

remaining wall thickness (below defect) is equal to td

N/A

Simulated defect for line corrosion in the sidewall-to-base transition area on inner surface (SBT)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for longitudinal sidewall crack on inner surface (L1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Longitudinal

Simulated defect for longitudinal sidewall crack on outer surface (L2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Longitudinal

Simulated defect for circumferential sidewall crack on inner surface (T1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Transverse

Simulated defect for circumferential sidewall crack on outer sidewall (T2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Transverse

td -minimum design wall thickness

For nickel cylinders and cylinders manufactured under an Equivalency Certificate, a Permit for an Equivalent Level of Safety, or a Special Permit, the machined defects shall be in accordance with Table 3 or Table 4 of this appendix.

For nickel cylinders and cylinders manufactured under an Equivalency Certificate, a Permit for an Equivalent Level of Safety, or a Special Permit in Class 2.3 gas service, the machined defects shall be in accordance with Table 3 of this appendix and the UE gain shall be increased by 6 dB after the system has been initially calibrated to establish the reference threshold specified in

section 5.3.2 of this appendix.

Table 3

Description of Machined Defect and Notation Symbol

Length

Width

Depth

Orientation

Simulated defect for reduction in wall thickness (area corrosion) on inner surface (MWP)

12.7 mm

(0.5 in.)

12.7 mm

(0.5 in.)

remaining wall thickness (below defect) is equal to td

N/A

Simulated defect for line corrosion in the sidewall-to-base transition area on inner surface (SBT)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for longitudinal sidewall crack on inner surface (L1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.06 of td

Longitudinal

Simulated defect for longitudinal sidewall crack on outer surface (L2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.06 of td

Longitudinal

Simulated defect for circumferential sidewall crack on inner surface (T1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.06 of td

Transverse

Simulated defect for circumferential sidewall crack on outer surface (T2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.06 of td

Transverse

Simulated defect for an isolated pit on inner surface (FBH)

6.4 mm (0.250 in.) in diameter

1/4 of td

N/A

td -minimum design wall thickness

APPENDIX A

Table 4

Description of Machined Defect and Notation Symbol

Length

Width

Depth

Orientation

Simulated defect for reduction in wall thickness (area corrosion) on inner surface (MWP)

12.7 mm

(0.5 in.)

12.7 mm (0.5 in.)

remaining wall thickness (below defect) is equal to td

N/A

Simulated defect for line corrosion in the sidewall-to-base transition area on inner surface (SBT)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.10 of td

Transverse

Simulated defect for longitudinal sidewall crack on inner surface (L1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Longitudinal

Simulated defect for longitudinal sidewall crack on outer surface (L2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Longitudinal

Simulated defect for circumferential sidewall crack on inner surface (T1)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Transverse

Simulated defect for circumferential sidewall crack on outer surface (T2)

25.4 mm

(1 in.)

0.254 mm

(0.01 in.)

0.05 of td

Transverse

td -minimum design wall thickness

A certification statement signed by a person certified to Level III in accordance with CAN/CGSB-48.9712-2006, ANSI/ASNT CP-189-2006, SNT-TC-1A-2006, or ISO 9712:2005, or a person holding a PhD degree in a discipline of engineering or physics with documented evidence of experience in non-destructive examination (NDE) of pressure vessels or pipelines using the ultrasonic examination technique or research/thesis work and authoring/co-authoring of technical papers published, in recognized technical journals, in the fields of ultrasonic examination methods shall be available for each calibration cylinder at each site where ultrasonic examination is performed. In addition, the certification

statement shall include a drawing indicating the dimensions and locations of the machined defects.

5.4 Examination Method

During the examination, each cylinder shall be examined by the calibrated UE system using a relevant set-up that is described in section 5.3.2 of this appendix.

The UE system shall be set up to perform a single scan (descending from the cylinder shoulder down to the SBT).

For each steel cylinder having a bottom that is concave to pressure, the thickness of the bottom at the centre shall be measured manually with a normal ultrasonic transducer. This measurement shall be greater than or equal to the minimum design wall thickness, except that the point of closure of cylinders closed by spinning (i.e. cylinders marked "SPUN") shall not be less than 2 times the minimum design wall thickness.

A copy of the operating examination procedure for performing ultrasonic examination of cylinders under the terms of this certificate shall be at each facility performing ultrasonic examination. At a minimum, this procedure shall include a description of the examination set-up; examination parameters; transducer model number, frequency and size; transducer assembly used; system calibration procedures and threshold gain used during the examination; and other pertinent information.

The equipment shall not allow examination of a cylinder unless the system has been properly calibrated, as described in section 5.3.2 of this appendix.

The rotational speed of a calibration cylinder shall be such that all simulated defects are detected, measured, and recorded.

The rotational speed of the cylinder under UE shall not exceed the rotational speed used during the calibration of the system.

The pulse rate shall be adjusted to ensure a minimum of 10% overlap for each helix.

The area of ultrasonic examination (UE) coverage shall be 100% of the cylindrical section and shall extend at least 76.2 mm (3 in.) into the sidewall-to-base transition area, where the sidewall-to-base transition actually occupies such distance.

The external surface of the cylinder to be examined shall be free of loose material such as scale, non-adhering paint, and dirt.

5.5 Interpretation of Results, Follow-up Examination, and Disposition

A cylinder shall be rejected if:

(a) the measured wall thickness is less than the calculated minimum design wall thickness for the cylinder specification under examination; or

(b) any defect indication such as but not limited to an isolated pit or sidewall crack produces a signal with an amplitude which crosses the applicable reference threshold specified in section 5.3.2 of this appendix.

Rejected cylinders shall either be subjected to follow-up non-destructive examination by personnel certified to Level II or Level III of CAN/CGSB-48.9712-2006, ANSI/ASNT CP-189-2006, SNT-TC-1A-2006, or ISO 9712:2005, for defect confirmation and characterization, or be condemned.

If follow-up examination is performed, a cylinder shall be condemned when the dimensions of the defect require the cylinder to be condemned according to CGA C-6-2007 or CGA C-6.1-2006, as applicable.

6. ULTRASONIC EXAMINATION PERSONNEL

6.1 The ultrasonic examination shall be carried out by a Senior Review Technologist (SRT), or under the general supervision of an SRT, either by a qualified tester or by a qualified operator operating an automated apparatus. Such an automated apparatus shall have been designed by an SRT and programmed to identify defects in accordance with this certificate.

6.2 An SRT shall be a person who provides written UE procedure, supervisory training, examinations (Level I and II), and technical guidance to operators, and reviews and verifies the examination results. An SRT shall have a thorough understanding of the Transportation of Dangerous Goods Regulations pertaining to the manufacture and requalification of cylinders that are authorized under this certificate and shall possess:

(a) a Level III certification in accordance with CAN/CGSB-48.9712-2006, ANSI/ASNT CP-189-2006, SNT-TC-1A-2006, or ISO 9712:2005, in ultrasonic examination;

(b) a Professional Engineer (PE) License with a documented experience for a minimum of 2 years experience in Non-Destructive Evaluation (NDE) of pressure vessels or pipelines using the ultrasonic examination technique; or,

(c) a PhD degree in a discipline of engineering or physics with documented evidence of experience in non-destructive examination (NDE) of pressure vessels or pipelines using the ultrasonic examination technique or research/thesis work and authoring/co-authoring of technical papers published, in recognized technical journals, in the fields of ultrasonic examination methods.

6.3 A qualified tester (certified to Level II in accordance with CAN/CGSB-48.9712-2006, ANSI/ASNT CP-189-2006, SNT-TC-1A-2006, or ISO 9712:2005) shall be a person who has at least:

(a) two years continuous experience of a technical nature involving cylinders;

(b) 40 hours of training or instruction in ultrasonic examination of cylinders or other pressure vessels; and

(c) 40 hours of experience in ultrasonic examination of cylinders under the direct personal supervision of an SRT.

6.4 A qualified operator (certified to Level I in accordance with CAN/CGSB-48.9712-2006, ANSI/ASNT CP-189-2006, SNT-TC-1A-2006, or ISO 9712:2005) shall be a person who has at least:

(a) a secondary school diploma; and

(b) 40 hours of training or instruction in the operation of the automated apparatus from an SRT. Such training or instruction shall cover calibration and verification of the equipment, as well as the examination procedure.

7. RECORDS

A record shall be prepared documenting the examination conditions and requalification results including:

(a) a reference to this certificate number;

(b) the specification, Equivalency Certificate, Permit for Equivalent Level of Safety, or Special Permit to which the cylinder was manufactured and its marked service pressure;

(c) the cylinder size (water capacity or outside diameter, and length);

(d) the cylinder serial number;

(e) the cylinder owner or operator;

(f) the requalification facility location and registered mark;

(g) the requalification date;

(h) the external visual inspection results;

(i) the internal visual inspection and eddy current examination results, as applicable;

(j) a record of system calibration before and after cylinder ultrasonic examination, as well as a description of the calibration cylinder used;

(k) the ultrasonic examination results, including the location of any defects on the cylinder where the indication exceeded the reference threshold as specified in section 5.3.2 of this appendix;

(l) reports of any follow-up examinations carried out at areas of defects on the cylinder where the indication exceeded the reference threshold as specified in section 5.3.2 of this appendix;

(m) if applicable, the average wall thickness measured;

(n) a statement regarding the acceptability of the cylinder for continued service; and

(o) the name of the qualified SRT who performed or supervised the ultrasonic examination, as well as identification of the persons who performed the external visual inspection, or the internal visual inspection and eddy current examination, as applicable, and any follow-up examination.

8. MARKING

Each cylinder requalified according to this certificate shall be marked in accordance with Clause 24.6 of CSA-B339-08. The procedure symbol shall be "UE". In addition, cylinders successfully requalified in accordance with section 4 of this appendix shall be marked with the procedure symbol "VE" following the procedure symbol "UE".

When a cylinder 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.



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Date modified:
2017-06-19