CIRCULAR

PROMULGATING PROCEDURE FOR INSPECTION OF TECHNICAL SAFETY OF INDUSTRIAL GAS CYLINDERS UNDER MANAGEMENT OF THE MINISTRY OF LABOR - INVALIDS AND SOCIAL AFFAIRS

Pursuant to the Law on Occupational Safety and Health dated June 25, 2016;

Pursuant to the Government’s Decree No. 14/2017/ND-CP dated February 17, 2017 defining the functions, tasks, powers and organizational structure of the Ministry of Labor - Invalids and Social Affairs;

Pursuant to the Government’s Decree No. 44/2016/ND-CP dated May 15, 2016 elaborating on several Articles of the Law on Occupational Safety and Health on technical inspection of occupational safety, occupational safety and health training and workplace environment monitoring;

Pursuant to the Government’s Decree No. 140/2018/ND-CP dated October 08, 2018 on amendments to Decrees related to business conditions and administrative procedures under the management of the Ministry of Labor - Invalids and Social Affairs;

At the request of the Director General of the Department of Work Safety;

The Minister of Labor - Invalids and Social Affairs hereby promulgate a Circular on procedure for inspection of technical safety of industrial gas cylinders under management of the Ministry of Labor - Invalids and Social Affairs.

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Promulgated together with this Circular is the procedure for inspection of technical safety of industrial gas cylinders under management of the Ministry of Labor - Invalids and Social Affairs, code: QTKD: 06-2021/BLDTBXH.

Article 2. Effect

1. This Circular comes into force from January 01, 2022.

2. Inspection procedure No. QTKD: 06-2016/BLDTBXH Procedure for inspection of technical safety of industrial gas cylinders promulgated together with the Circular No. 54/2016/TT-BLDTBXH dated December 28, 2016 of the Ministry of Labor - Invalids and Social Affairs shall cease to have effect from the effective date of this Circular.

Article 3. Implementation

1. Ministries, ministerial agencies, Governmental agencies, People’s Committees of provinces and central-affiliated cities, organizations and individuals concerned are responsible for the implementation of this Circular.

2. Difficulties that arise during the implementation of this Circular should be reported to the Ministry of Labor - Invalids and Social Affairs for instructions and resolution./.

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PROCEDURE FOR INSPECTION OF TECHNICAL SAFETY OF INDUSTRIAL GAS CYLINDERS UNDER MANAGEMENT OF THE MINISTRY OF LABOR - INVALIDS AND SOCIAL AFFAIRS

CODE QTKD: 06-2016/BLDTBXH

(Promulgated with the Circular No. 17/2021/TT-BLDTBXH dated November 15, 2021 of the Minister of Labor - Invalids and Social Affairs)

Article 1. Scope

This technical safety inspection procedure shall be used for first, periodic and unexpected inspections of industrial gas cylinders with a working pressure of more than 0.7 bar (hereinafter referred to as “gas cylinders”) under state management of the Ministry of Labor - Invalids and Social Affairs as prescribed in Appendix Ib of the Government’s Decree No. 44/2016/ND-CP dated May 15, 2016 elaborating on several Articles of the Law on Occupational Safety and Health on technical inspection of occupational safety, occupational safety and health training and workplace environment monitoring.

This inspection procedure shall not be used for inspection of liquefied petroleum gas (LPG) cylinders.

Article 2. Regulated entities

1. Organizations carrying out technical inspections of occupational safety (hereinafter referred to as “inspecting organization”).

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3. Organizations and individuals managing, using and owning industrial gas cylinders (hereinafter referred to as “establishments”).

4. Regulatory bodies, relevant organizations and individuals.

Article 3. Normative references

1. National technical regulation on safe work of steam boiler and pressure vessel QCVN:01-2008/BLDTBXH promulgated together with the Decision No. 64/2008/QD-BLDTBXH dated November 27, 2008 of the Ministry of Labor - Invalids and Social Affairs (hereinafter referred to as “QCVN:01-2008/BLDTBXH”).

2. TCVN 6292:2013 Gas cylinders - Refillable welded steel cylinders issued together with Decision No. 1475/QD-BKHCN dated June 12, 2013 of the Ministry of Science and Technology (hereinafter referred to as “TCVN 6292:2013”).

3. TCVN 6294:2007 Gas cylinders - Welded carbon -steel gas cylinders issued - Periodic inspection and testing issued together with Decision No. 3213/QD-BKHCN dated December 31, 2007 of the Ministry of Science and Technology (hereinafter referred to as “TCVN 6294:2007”).

4. TCVN 6295:1997 Gas cylinders - Seamless gas cylinders - Safety and performance criteria (of water capacities between 0.5 l to 150 l, regardless of any pressure) issued together with Decision No. 2123/QD-BKHCN dated April 05, 2018 of the Minister of Science and Technology (hereinafter referred to as “TCVN 6295:1997”).

5. TCVN 6871:2007 Gas cylinders - Transportable cylinders for dissolved acetylene - Periodic inspection and maintenance issued together with Decision No. 3213/QD-BKHCN dated December 31, 2007 of the Ministry of Science and Technology (hereinafter referred to as “TCVN 6871:2007”).

6. TCVN 6156:1996 Pressure vessels - Safety engineering requirements of erection, use, repair - Testing method issued together with Decision No. 1596/QD-TDC dated July 26, 1996 of the Ministry of Science and Technology (hereinafter referred to as “TCVN 6156:1996”).

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Article 4. Terms and definitions

For the purposes of this inspection procedure, the following terms and definitions apply:

1. “industrial gas cylinder” means a cylinder which is used to contain and transport gases, liquefied gas or dissolved gas (industrial gas) at above atmospheric pressure and with a water capacity of up to 150 liters, manufactured and labeled in accordance with the provisions of TCVN 6292:2013 and TCVN 6295:1997.

2. “first safety inspection” means the evaluation of technical safety of an industrial gas cylinder according to national technical regulations and technical safety standards after its manufacturing and before its first use.

3. “periodic safety inspection” means the evaluation of technical safety of equipment according to national technical regulations and technical safety standards after expiration of the last safety inspection result.

4. “unscheduled safety inspection” means the evaluation of technical safety of according to national technical regulations and technical safety standards after such equipment is repaired, replaced or processed affecting technical safety of the cylinder or at the request of the establishment or a competent authority.

Article 5. Inspection equipment and instruments

Inspection equipment and instruments shall be inspected and calibrated in accordance with regulations. Inspection equipment and instruments includes the following:

1. Non-destructive thickness gauge.

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3. Equipment for cylinder valve installation and removal.

4. Hydraulic testing equipment.

5. Cylinder leak tester.

6. Volumetric expansion tester.

7. Internal cylinder cleaning equipment.

8. Equipment for in-cylinder examination by endoscopic method.

9. Vacuum equipment.

10. Electronic scale.

11. Cylinder stamping equipment.

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Article 6. Conditions for inspection

The inspection of industrial gas cylinders must not be carried out unless the following conditions are met:

1. The cylinders are at the ready for inspection.

Gas cylinders fully filled with gas before being imported into Vietnam must undergo a first safety inspection according to the steps specified in clause 1 and clause 2 Article 8 of this inspection procedure (excluding the steps specified in clauses 3 through 8 Article 8 of this inspection procedure). The inspection carried out by following all steps prescribed in Article 8 of this inspection procedure shall be only applied to cylinders before being re-filled with gas for subsequent use or cylinders due for inspection prescribed in Article 9 of this inspection procedure.

2. Documents of the cylinders are adequate.

3. The inspection is not affected by environment or weather.

4. Requirements concerning occupational safety and health are met.

Article 7. Preparation for inspection

Before carrying out an inspection, it is required to make the following preparations:

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a) Preparing documents of the cylinders.

b) Determining the cylinders to be inspected:

- Regarding first safety inspection: Randomly select 5% of the batch of cylinders to be inspected (the selected cylinders must be representative of the sub-batches of cylinders). If any of the inspected cylinders is found failed, 100% of the cylinders in the batch must be inspected (according to point 4.2 TCVN 6156:1996).

- Regarding periodic or unexpected inspection: inspect 100% of the cylinders.

c) Prepare a delivery record and make preparations in respect of human resources and vehicles for transport of cylinders to the place of inspection.

d) Preliminary inspection and instructions:

- Immediately reject any cylinder which is not owned by the establishment or the inspection of which is not requested by the authorized establishment;

- Reject cylinders which are not listed or on which specifications are unavailable or unclear, cylinders with defects exceeding the rejection limits such as: bulge, dent, intersecting cut or gouge, crack, fire damage, arc or torch burns;

- Proceed to release and treat the residual gases in the cylinders, making sure the cylinders are free of pressure and residual gases;

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dd) For cylinders that have been filled with storage gas, when the periodic inspection is due, such cylinders must be inspected at a rate of 5%.

- If the inspected cylinders are passed, the remaining cylinders may be stored/used for no more than one year;

- If any of the inspected cylinders is failed, 100% of the remaining cylinders must be inspected. The period of gas release for inspection of 100% of the cylinders must not exceed one month.

e) Making preparations in respect of human resources, supplies and equipment to serve the inspection; appoint personnel to participate in and witness the inspection.

2. Prepare suitable and adequate facilities for inspection.

3. Develop safety measures and reach an agreement thereon with the establishment before inspection. Provide adequate personal protective equipment to ensure safety during the inspection.

Article 8. Inspection steps

Upon conducting a technical safety inspection of gas cylinders, the inspector shall follow the inspection steps in turn. The next inspection step is taken only when the result of the previous step is passed. Inspection steps consist of:

1. Step 1: Examine documents, profiles or information of the cylinders

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a) Upon first safety inspection:

- Profile of the cylinder batch and technical documents of the manufacturer (forms are provided under QCVN 01-2008/BLDTBXH). The following documents should be considered:

+ Indicators concerning manufacturing metals, welding metals;

+ Calculation of strength of pressure retaining components;

+ Structural drawings showing all main dimensions;

+ Guidelines on operation, maintenance and repair (if any);

+ Certificate of conformity issued by the designated organization as prescribed in the case where the competent authority has promulgated national technical regulations applicable to the inspected cylinders.

- Factory acceptance record of the cylinder batch:

+ Certificate of the manufacturer, standards applied;

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+ Certificate of manufacturing metals;

+ Record and sheet of the strength and leak test results for the batch of cylinders;

+ Report on examination of mechanical properties of welds;

+ Record of the volume expansion test results;

+ Record of the explosion test results;

+ Record of the thickness and weld test results (if any).

b) Upon periodic safety inspection:

- Previous profile of the cylinder batch, inspection record and certificate of inspection result or information and documents about the cylinders.

- Documents on the use, operation and maintenance; inspection or examination record (if any).

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- Documents on the use, operation and maintenance; inspection or examination record (if any).

- Documents on repair, post-repair acceptance record documenting the replacement of pressure retaining components.

The document and profile inspection result is passed if the documents and profiles are adequate and comply with the regulations set out in point 2.4 QCVN: 01/2008/BLDTBXH. If failed, the establishment shall take remedial actions.

2. Step 2: External technical inspection

a) Check the technical specifications stamped on the handle or neck of each cylinder, compare them with the technical data on the cylinder on the list of cylinders to be inspected. Reject cylinders not included in the list of cylinders to be inspected and cylinders on which specifications are missing or blurred.

b) Check the condition of the surface, welds, base, and handles (if any).

c) When there is any suspicion during the visual inspection, additional tests or examination measures must be applied such as: ultrasonic testing of thickness or welds (if any) or other non-destructive testing measures.

d) Evaluation: A cylinder is passed if its components remain normal, there is not any unusual sign and specifications on the cylinder are consistent with those on documents. Reject cylinders according to point 4.8 of TCVN 6156:1996, Appendix C of TCVN 6294:2007 and Appendix C of TCVN 6871:2007.

3. Step 3: Internal technical inspection

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- Cylinders containing inert gas, non-toxic and non-flammable gases may be placed in direct release position.

- Cylinders containing toxic and flammable gases must be treated using specialized equipment. The recovered gases may be used or treated safely and must not be released directly into the environment.

b) Remove valves from the cylinder head, prevent impact that can cause deformation or damage to the cylinder’s valve or neck thread.

c) Examine the tightness of the valves and safety parts (if any); reject failed valves.

d) Clean the inside of the cylinders (For acetylene cylinders containing porous mass, the cleaning step is not required but the quality of the porous mass must be checked according to the manufacturer's instructions or TCVN 6871:2007).

dd) Check the inside of the cylinders with an endoscope to evaluate the metal surface and welds (not applicable to soluble acetylene cylinders). In case of any suspicion, request the establishment to adopt other appropriate measures.

e) Evaluation: A cylinder is passed if its inside remains normal and there is not any unusual sign. Reject cylinders according to point 4.8 of TCVN 6156:1996.

4. Step 4: Technical inspection of pressure resistance (strength test)

Strength test shall not be performed on cylinders containing porous mass.

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Table 1: Strength test pressure, test media and test holding time

Type of cylinder

Test medium

Test pressure
(bar)

Holding time
(minute)

Normal welded cylinder

Water

1.5 maximum working pressure

≥ 0,5

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Air or inert gas

1.5 maximum working pressure

≥ 0,5

Seamless cylinder

Water

1.5 maximum working pressure

≥ 2

b) Temperature of the test medium must be less than 50°C and can be colder than the ambient temperature by up to 5°C.

c) The pressure shall be increased or decreased slowly so as not to cause sudden expansion, thereby affecting the cylinder’s strength.

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- Before performing test with gas, the strength must be calculated according to actual measurements of the cylinder

- Safety measures in case of test with gas:

+ The gas supply valve and sample pressure gauge on the gas inlet line must be placed away from the cylinder location;

+ A prohibition sign “No unauthorized entry to the test area” must be erected;

+ A safe gas supply must be ensured.

Evaluation: A cylinder is passed if the pressure does not decrease when maintained at the test pressure, there is no leakage from the cylinder body or welds or there is no deformation in excess of the prescribed limits.

dd) For welded cylinders: carry out evaluation according to point 9.1 of TCVN 6292:2013.

e) For seamless cylinders: carry out evaluation according to according to point C.4.3 of TCVN 6295:1997.

5. Step 5: Volumetric expansion test

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a) Water jacket method: Enclose the water-filled cylinder in a jacket that is also filled with water. The total and any permanent volumetric expansion of the cylinder are measured as to the amount of water displaced by the expansion of the cylinder when under pressure and after the pressure is released (carry out evaluation according to C.5.2.1 of TCVN 6295:1997).

b) Non-water jacket method: Measure the amount of water passed into the cylinder as it is pressurized to test pressure and measure the amount of water expelled from the cylinder to reduce the pressure to atmospheric pressure. First measure the amount of water while increasing the water pressure in the cylinder to determine the total expansion of the cylinder at test pressure, then measure the amount of water expelled from the cylinder, subtract that amount of water from the total expansion to determine the permanent volumetric expansion (carry out evaluation according to C.5.2.2 of TCVN 6295:1997).

Evaluation: according to point C.5.3 of TCVN 6295:1997.

For a seamless cylinder (of a capacity between 12 and 55 l), rely on the increase in volume or decrease in weight of the cylinder shell to reduce the working pressure of the cylinder or reject it according to the provisions in point 4.10 of TCVN 6156:1996.

Note: The volumetric expansion test on seamless cylinders shall be conducted together with the strength test.

c) Remove and clean the test medium; dry the inside of the cylinder.

d) Install the tested valves on the cylinder.

6. Step 6: Tightness test

a) Test medium: Air or inert gas.

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c) For seamless cylinders: Fill the cylinders with compressed air or inert gas to a pressure of 50% to 60% of the maximum working pressure, hold this pressure for 01 minute.

d) Check the tightness of the connectors, valve joints, etc. of the cylinders with soap solution or in a specialized tank. Leaking cylinders must be treated and their tightness must be re-tested.

Evaluation:

- For welded cylinders: carry out evaluation according to point 9.2 of TCVN 6292:2013;

- For seamless cylinders: carry out evaluation according to according to point C.6.3 of TCVN 6295:1997.

7. Step 7: Degassing and vacuuming

If a cylinder is passed, proceed to completely degas the cylinder, dry its outside; vacuum and fill the cylinder with shielding gas (if required).

8. Step 8: Checking tare weight of cylinders

a) Weigh each cylinder and determine its tare weight (carry out evaluation according to point 10.2 of TCVN 6292:2013). Check and compare it with the tare weight stamped by the manufacturer on the cylinder;

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c) For seamless cylinders: carry out evaluation according to according to point 4.10 of TCVN 6156:1996.

9. Step 9: Processing inspection results

a) Prepare an inspection record and a list of cylinders and cylinder batches which contain sufficient information according to the form specified in the Appendices to this inspection procedure.

b) Approve the inspection record:

Mandatory participants in the process of approving the inspection record include:

- When inspecting cylinders at the inspecting organization's facility:

+ Facility's head directly inspecting cylinders;

+ Inspectors supervising the inspection of cylinders;

+ Head of the technician team directly inspecting cylinders.

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- When inspecting cylinders at the establishment:

+ Its representative or person authorized by the establishment;

+ Person assigned to witness the inspection;

+ Inspectors conducting the inspection.

As the record is approved, the inspectors, the witness, and the representative of the establishment or a person authorized by the establishment shall append their signatures and seals (if any) on the record.  The record shall be made into two (02) copies, each party shall keep 01.

c) Write the brief inspection result to the profile of the cylinder batch (including full names of the inspectors and the date of inspection).

d) Affix an inspection symbol:

- Stamp information about inspection results on the handle or shoulder of each cylinder in the correct size and in the same row in the following order: Symbol of the inspecting organization-month/year of inspection-month/year of next inspection (according to point 14.4 of TCVN 6294:2007 or point 4.12 of TCVN 6156:1996).

Such information must not cover existing numbers on the cylinder’s handle or shoulder.

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- For gas cylinders filled with gas as specified in clause 1 Article 6 of this inspection procedure, the inspection symbol is not required to be affixed but is affixed upon the next inspection.

d) Rejected cylinders must have the thread on their neck damaged or have their body drilled to prevent gas from being mistakenly filled into the cylinders. Apply the rejection method specified in section 15 of TCVN 6294:2007 to carbon steel gas cylinders or section 10 of TCVN 6871:2007 to acetylene cylinders.

e) Certify the inspection result: If an inspected cylinder passes the test, the inspecting organization shall issue the certificate of inspection result to the cylinder or cylinder batch within 05 working days from the date on which the inspection record is approved.

g) If the cylinder or cylinder batch fails the test, the regulations set out in points a, b and c clause 9 of this Article shall be complied with and the inspection record explicitly specifying the explanation for the failure shall be issued to the establishment.

h) Cooperate with the establishment in handling rejected cylinders as prescribed in point d clause 9 of this Article. Dossiers on rejected cylinders must be archived at the inspecting organization; the inspection record and notification shall be sent to the employment authority of the area where the inspection facility is located.

Article 9. Inspection interval

1. The technical safety inspection interval is 05 (five) years.

2. For cylinders that have been used for more than 20 (twenty) years and cylinders that contain corrosive and toxic gases such as Chlorine, Hydrogen Sulfide, Methane Chloride, Phosphine, Sulfuric Anhydride and Hydrogen Chloride, the technical safety inspection interval is 02 (two) years.

3. For cylinders that contain corrosive and toxic gases such as Chlorine, Hydrogen Sulfide, Methane Chloride, Phosphine, Sulfuric Anhydride and Hydrogen Chloride that have been used for more than 20 (twenty) years, the technical safety inspection interval is 01 (one) year.

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5. If the inspection interval is shortened, the inspector shall specify explanation in the inspection record.

6. If the inspection interval is specified in national technical regulations, such national technical regulations shall apply.

APPENDIX 01

SPECIMEN OF RECORD ON INSPECTION OF TECHNICAL SAFETY OF INDUSTRIAL GAS CYLINDERS

(Name of the inspecting organization)
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THE SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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.............., [place], ………[date]

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RECORD ON INSPECTION OF TECHNICAL SAFETY OF INDUSTRIAL GAS CYLINDERS
No. .........................

Pursuant to the Procedure for inspection of technical safety of gas cylinders No. QTKD: 06-2021/BLDTBXH promulgated together with the Circular No. ............/2021/TT-BLDTBXH dated ..., 2021 of the Ministry of Labor - Invalids and Social Affairs.

We are:

Representatives of the inspecting organization:

1.…………………………… Inspector number:………………..……………..…..….

2.…………………………… Inspector number:…………………………..…..…..….

currently working for: …………………………………………………………….……. (specify name of the inspecting organization)

Registration certificate No. ……………………………….……..…….

Individuals witnessing the inspection and approving the record:

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2………………………………….…… Position:………….........……………….

Have inspected (names of cylinders):……………………. …………………………

Under ownership/management of (name of the organization or individual owning/managing cylinders):……….…………

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Address (head office of the establishment):……………………………………………..………

Address (location) of installation:…………………………………………………….……………

I - BASIC SPECIFICATIONS

- Name and address of the manufacturer:……………………………………………………….

- Month and year of manufacture:…………………………………………………………….…..

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- Quantity and list of inspected sample cylinders: ................................................................

- Name of brand stamped on cylinders:................................................................................

- Working pressure: ………….. bar Test pressure: .........................................bar.

- Capacity: ……………….liter Tare weight: ………………………kg.

- Uses:………………….…......................................................................................

- Previous inspection record No. (if any):……………….. dated:…………………… conducted by (name of inspecting authority): ……………………..……………….………………..

II - FORMS OF INSPECTION

First time □                  Periodic □                 Unscheduled □

- Reason for unscheduled inspection (if any):……………….………………………..…….

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1. Document and profile examination:

Item

Evaluation

Yes

No

Cylinder profile and documents

Manufacturer’s technical documentation (applicable to first inspection, evaluation under point a section 1 Article 8 of Inspection Procedure QTKD :06-2021/BLDTBXH)

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Cylinder factory acceptance record (applicable to first inspection, evaluation under point a section 1 Article 8 of Inspection Procedure QTKD :06-2021/BLDTBXH)

Previous inspection documents: Previous inspection record and certificate of previous inspection result
(Not applicable to first inspection)

Documents on the use, operation and maintenance; inspection or examination record (if any)

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Documents on repair, post-repair acceptance record documenting the replacement of pressure retaining components (if any)

Other documents (if any)

(Specify enclosed documents)

Result evaluation:

- Remarks:……………………………………………………………..................................

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2. External technical inspection

- Remarks:……………………………………………………………..................................

…………………………………………………………………………………………………..

- Technical specifications stamped on the cylinder: …………………………………........

- Defects - deformations: ……………………………….................………..…………

- Result evaluation:                    Passed ⬜                   Failed ⬜

3. Internal technical inspection

- Remarks:……………..………………..……………………………………...........................

…………………………………………………………………………………………………..

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- Metal surface, welds (not applicable to dissolved acetylene cylinders):…....

- Porous mass (for dissolved acetylene cylinders): ………………................…………..…

- Result evaluation:                    Passed ⬜                   Failed ⬜

4. Test:

Type of test

Test medium

Test pressure
(bar)

Holding time
(minute)

Strength test

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Volumetric expansion test

Tightness test

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- Remarks:…………………………………………………………….......................

- Result evaluation:                    Passed ⬜                   Failed ⬜

IV – CONCLUSION AND RECOMMENDATIONS

1. Batch (quantity of cylinders) inspected: Passed ⬜                   Failed ⬜

2. Has an inspection symbol affixed at: …………………………………………….

3. Working pressure: ……………………bar.

4. Recommendations: ……………………………………………………………………………..

5. Deadline for implementation of recommendations: …………………………………………………………….

V - INSPECTION INTERVAL

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The record is approved on……………………[date]

At (specify the place of inspection): ………………………………………………………….../.

1- At the inspecting organization's inspection facility:

HEAD OF FACILITY
(Signature, full name)

INSPECTOR
(Signature, full name)

TECHNICIAN
(Signature, full name)

2- At the establishment:

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WITNESS
(Signature, full name)

INSPECTOR
(Signature, full name)

APPENDIX 02

LIST OF INSPECTED SAMPLE CYLINDERS

Cylinder batch:

Quantity of cylinders:

Manufacturing number: From………………..to……………………………………………..……

User (manager):

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No.

Manufacturing number

Month and year of manufacturing

Manufacturer

Weight (Kg)

Capacity
(liter)

Result

Passed

Failed (Specify reason)

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APPENDIX 03

LIST OF CYLINDERS NOT INCLUDED IN BATCHES (OR LIST OF CYLINDER BATCHES)

Cylinder batch:

Quantity of cylinders not included in cylinder batches:

User (manager):

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No.

Manufacturing number

No.

Manufacturing number

No.

Manufacturing number

No.

Manufacturing number

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Note:

+ When a cylinder batch is continuously numbered, the quantity of cylinders not included in batches is small (since some cylinders were taken out by the manufacturer for mechanical testing, destructive testing, etc.), write “DANH SÁCH CÁC CHAI KHÔNG CÓ TRONG LÔ” (“LIST OF CYLINDERS NOT INCLUDED IN BATCHES”. When a cylinder batch is not continuously numbered, write “DANH SÁCH LÔ CHAI” (“LIST OF CYLINDER BATCHES”) and fully write numbers of cylinders in the batches.

+ If the quantity of cylinders is small, write it in the record. An enclosed list of cylinders is not required.

Note: This list of cylinders must not be erased or modified and must bear a seal at the upper left corner or seal on adjoining edges of pages.

APPENDIX 04

LIST OF INSPECTED CYLINDER BATCHES

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Quantity of cylinders:

Manufacturing number: From………………..to……………………….

User (manager):

(Enclosed with inspection record or certificate of inspection No. …………, dated…)

No.

Manufacturing number

Month and year of manufactyuring

Manufacturer

Weight (Kg)

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Passed

Failed (Specify reason)

1

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Thông tư 17/2021/TT-BLĐTBXH quy định về quy trình kiểm định kỹ thuật an toàn chai chứa khí công nghiệp thuộc thẩm quyền quản lý của Bộ Lao động - Thương binh và Xã hội