Thông tư 12/2021/TT-BLĐTBXH Quy trình kiểm định kỹ thuật an toàn thang máy

CIRCULAR

On promulgation of the technical safety examination procedure for lifts under the management of the Ministry of Labor, Invalids and Social Affairs

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Pursuant to the Law on Occupational Safety and Health dated June 25, 2015;

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

Pursuant to Decree No. 44/2016/ND-CP dated May 15, 2016 of the Government detailing a number of articles of the Law on Occupational Safety and Health regarding technical examination of occupational safety, training in occupational safety and health, and monitoring of occupational environment;

Pursuant to Decree No. 140/2018/ND-CP dated October 08, 2018 of the Government amending and supplementing a number of articles related to business conditions and administrative procedures under the State-level governance of the Ministry of Labor, Invalids and Social Affairs;

At the proposal of the Department of Work Safety;

The Minister of Labor, Invalids and Social Affairs hereby promulgates the Circular on promulgation of the technical safety examination procedure for lifts under the management of the Ministry of Labor, Invalids and Social Affairs.

Article 1. Name and designation code of the examination procedure

The technical safety examination procedure for lifts under the management of the Ministry of Labor, Invalids and Social Affairs is promulgated herewith, with its designation code as follows: QTKD: 02-2021/BLDTBXH.

Article 2. Effect

1. This Circular takes effect on November 15, 2021.

2. Examination procedures QTKD: 21- 2016/BLDTBXH Technical safety examination procedure for electric lifts, QTKD: 22- 2016/BLDTBXH Technical safety examination procedure for hydraulic lifts and QTKD: 24- 2016/BLDTBXH Technical safety examination procedure for machine room-less lifts promulgated together with Circular No. 54/2016/TT-BLDTBXH dated December 28, 2016 of the Minister of Labor, Invalids and Social Affairs cease to be effective from the effective date of this Circular.

Article 3. Implementation organization

1. Ministries, ministerial-level agencies, Government-attached agencies, People’s Committees of provinces and centrally-run cities, and relevant organizations, individuals shall implement this Circular.

2. Any difficulties arising in the course of implementation should be reported to the Ministry of Labor, Invalids and Social Affairs for guidance and resolution./.

TECHNICAL SAFETY EXAMINATION PROCEDURE FOR LIFTS UNDER THE MANAGEMENT OF THE MINISTRY OF LABOR, INVALIDS AND SOCIAL AFFAIRS - QTKD: 02-2021/BLDTBXH

(Attached to Circular 12/2021/TT-BLDTBXH dated September 30, 2021 of the Minister of Labor, Invalids and Social Affairs)

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Article 1. Scope of regulation

1. The technical safety examination procedure is applicable to technical safety examinations for the first time, on a periodic basis, or following exceptional circumstances of passenger and goods lifts, with traction, positive or hydraulic drive, serving defined landing levels, having a car designed for the transportation of persons or persons and goods, suspended by ropes, chains or jacks and moving between guide rails inclined not more than 15° to the vertical as specified in QCVN 02:2019/BLDTBXH National technical regulation on safety for lift (hereinafter abbreviated as QCVN 02:2019) promulgated together with Circular No. 42/2019/TT-BLDTBXH dated December 30, 2019 of the Minister of Labor, Invalids and Social Affairs and QCVN 32:2018/BLDTBXH National technical regulation on safe work for home lift (hereinafter abbreviated as QCVN 32:2018) promulgated together with Circular No. 15/2018/TT-BLDTBXH dated October 12, 2018 of the Minister of Labor, Invalids and Social Affairs.

For lifts installed in structures of which documents proving design appraisal and construction permits are issued before the effective date of QCVN 02:2019 or lifts installed in existing buildings, where in some circumstances due to limitations enforced by building constraints, some requirements of the above standards cannot be met, examination shall consider the respective criteria specified in TCVN 6396-21:2020 (EN 81-21:2018) as a basis for assessing the technical safety of lifts.

2. This Procedure is not applicable to:

a) Lifts with drive systems other than those stated in Clause 1, Article 1 of this Procedure;

b) Lifts with rated speed ≤ 0.15 m/s;

c) Hydraulic lifts with a rated speed exceeding 1 m/s or where the setting of the pressure relief valve exceeds 50 MPa;

d) Lifts that are intended to carry freight;

dd) Lifting appliances, such as paternosters, mine lifts, theatrical lifts, appliances with automatic caging, skips, lifts and hoists for building and public works sites, ships' hoists, platforms for exploration or drilling at sea, construction and maintenance appliances or lifts in wind turbines.

Article 2. Subjects of application

1. Entities that conduct technical examination of occupational safety (hereinafter referred to as examination bodies).

2. Inspectors who conduct technical examination of occupational safety.

3. Organizations and individuals that manage, use and own lifts (hereinafter referred to as employers).

4. State authorities and relevant organizations and individuals.

Article 3. Normative references

1. National technical regulation on safety for lift, with designation code: QCVN 02:2019/BLDTBXH promulgated together with Circular No. 42/2019/TT-BLDTBXH dated December 30, 2019 of the Ministry of Labor, Invalids and Social Affairs (hereinafter referred to as QCVN 02:2019/BLDTBXH).

2. National technical regulation on safe work for home lift, with designation code: QCVN 32:2018/BLDTBXH promulgated together with Circular No. 15/2018/TT-BLDTBXH dated October 12, 2018 of the Ministry of Labor, Invalids and Social Affairs (hereinafter referred to as QCVN 32:2018/BLDTBXH).

3. TCVN 6396-20:2017 (EN 81-20:2014) Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods Part 20: Passenger and goods passenger lifts, announced under Decision No. 3945/QD-BKHCN dated December 29, 2017 of the Ministry of Science and Technology (hereinafter referred to as TCVN 6396-20:2017).

4. TCVN 6396-50:2017 (EN 81-50:2014) Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods Part 50: Design rules, calculations, examinations and tests of lift components, announced under Decision No. 3945/QD-BKHCN dated December 9, 2017 of the Ministry of Science and Technology (hereinafter referred to as TCVN 6396-50:2017).

5. TCVN 6396-21:2020 (EN 81-21:2018) Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing building, announced under Decision No. 3215/QD-BKHCN dated November 19, 2020 of the Ministry of Science and Technology (hereinafter referred to as TCVN 6396-21:2020).

6. TCVN 9358:2012 Installation of equipment earthing system for industrial projects - General requirements, announced in 2012 by the Ministry of Science and Technology (hereinafter referred to as TCVN 9358:2012).

7. TCVN 7550:2005 (ISO 4344:2004) Steel wire ropes for lifts - Minimum requirements, announced under Decision No. 2732/QD-BKHCN dated December 9, 2008 of the Ministry of Science and Technology (hereinafter referred to as TCVN 7550:2005).

8. TCVN 6904:2001 Electric lift - Test methods for the safety requirements of construction and installation, announced under Decision No. 2376/QD-BKHCN dated October 24, 2008 of the Ministry of Science and Technology (hereinafter referred to as TCVN 6904:2001).

9. TCVN 6905:2001 Hydraulic lift - Test methods for the safety requirements of construction and installation, announced under Decision No. 2376/QD-BKHCN dated October 24, 2008 of the Ministry of Science and Technology (hereinafter referred to as TCVN 6905:2001).

In the case where national technical regulations and national standards normatively referenced in this Examination Procedure are supplemented, amended or replaced, the latest editions shall apply.

Article 4. Terms and definitions

For the purposes of this procedure, the terms and definitions given in the normative references cited above and the following apply:

1. Lift means a lifting appliance serving specific levels, having a carrier with suitable dimensions and structure intended to transport persons or freight moving along guides which are rigid and inclined at an angle of more than 150 to the horizontal.

2. Technical safety examination for the first time means the assessment of the technical safety of a lift according to national technical regulations and technical safety standards after installation of the lift and before it is put into service.

3. Technical safety examination on a periodic basis means the assessment of the technical safety of a lift according to national technical regulations and technical safety standards after the interval of the previous periodic examination.

4. Technical safety examination following exceptional circumstances means the assessment of the technical safety of a lift according to national technical regulations and technical safety standards:

a) After important repair, upgrades, and modifications liable to jeopardize the technical safety of the lift. The following are considered as important modifications:

- Change in the manufacturer’s design of:

+ The rated speed;

+ The rated load;

+ The mass of the car;

+ The travel.

- Change or replacement of:

+ The type of locking devices (the replacement of a locking device by a device of the same type is not considered as an important modification);

+ The control system;

+ Lifting ropes;

+ Guide rails;

+ The type of door (or the addition of one or more landing or car doors);

+ The machine or the traction sheave;

+ The overspeed governor;

+ The buffers;

+ The safety gear;

+ The unintended car movement protection;

+ The pawl device;

+ The jack;

+ The pressure relief valve;

+ The rupture valve;

+ The restrictor/one-way restrictor;

+ The mechanical device for preventing movement of the car;

+ The mechanical device for stopping the car;

+ The platform;

+ The mechanical device for blocking the car or movable stops;

+ The devices for emergency and rescue operations.

Notes: Changed or substitute items and equipment must have characteristics and technical specifications equivalent to the lift manufacturer's design.

b) At the request of the employers or competent authorities.

Article 5. Equipment and instruments serving examinations

1. Equipment and instruments serving examinations must be inspected and calibrated according to regulations. Equipment and instruments serving examinations include:

a) Speed log;

b) Rangefinder;

c) Geometric dimensioning and tolerancing inspection instruments;

d) Temperature meter;

dd) Light meter;

e) Insulation tester;

g) Earth resistance tester;

h) Multimeter;

i) Clamp meter;

k) Automatic level (if necessary).

2. The precision of the instruments shall allow, unless specified, measurements to be made within the following accuracy:

a) ± 1 % masses, forces, distances, speeds;

b) ± 2 % accelerations, retardations;

c) ± 5 % voltages, currents;

d) ± 5 °C temperatures;

dd) ± 2.5 % flow rate;

e) ± 1 % pressure P ≤ 200 kPa;

g) ± 5 % pressure P > 200 kPa.

3. Equipment and instruments serving technical safety examinations of lifts that are measuring instruments must comply with the law regulations on measurement.

Article 6. Examination conditions

When conducting an examination, the following conditions must be met:

1. The lift must be in a state ready for the examination;

2. Technical documents of the lift must be adequate;

3. Environmental and weather conditions must be met and not cause influences on the examination;

4. Occupational safety and health conditions must be met to operate the lift.

Article 7. Preparation of the examination

1. The examination body and the examination requester shall coordinate in: Agreeing on the examination plan, preparing conditions for examination and appointing personnel to participate in and witness the examination.

2. The examination requester shall: Prepare documentation, dossiers and documents related to the lift as stated in Clause 1, Article 8 of this Procedure.

3. The examination body and the examination requester shall coordinate in: Unanimously implementing safety measures; providing adequate instruments and personal protective equipment to ensure safety during the examination process.

Article 8. Examination steps

When performing technical safety examination of a lift, inspectors must follow the examination steps below one by one. The next examination step can only be conducted when the examination results in the previous step is qualified. Examination steps include:

1. Step 1: Verification of documentation of the lift

a) Documentation of the lift: Assessed under Points 3.1.1 and 3.4.2 QCVN 02:2019.

b) Type examination certificate: Assessed under Point 3.1.2 QCVN 02:2019 (applicable to examinations for the first time)

c) Examination certificate and examination record that have been previously issued (not applicable in case of examination for the first time).

d) Maintenance documentation: Assessed under Points 3.5.1, 3.5.2.5 and 3.5.3.3 QCVN 02:2019.

dd) Maintenance, repair and replacement records (if any): Assessed under Point 3.5.2.5 QCVN 02:2019

e) Design and as-built dossier of well construction (applicable to lifts installed and examined for the first time): Details thereof to be assessed under Clauses 2.1.1.11, 2.1.1.12, 2.1.1.13, 2.1.1.14, 2.1.1.15 and 2.1.1.16 QCVN 02:2019.

2. Step 2: External technical examination

a) Check of the completeness and synchronization of the lift according to Point 3.2 TCVN 6904:2001 for electric lifts or Clause 3.2 TCVN 6905:2001 for hydraulic lifts; the accuracy between the manufacturer's and installer's records compared to reality (in terms of parameters, technical indicators, brand).

b) Check for the accuracy between the manufacturer's and installer's records compared to reality (in terms of parameters, technical indicators, and brand).

c) Check for defects and deformations of machine parts and assemblies (if any).

d) Check and inspection of the technical conditions of machine parts and assemblies.

dd) Check of the arrangement of electrical panels and electrical switches in the machine room; cables from the main electrical panel to the electrical caret, from the electrical caret to machine parts and travel limit devices.

e) Check of the counterweight frame, the situation of installing the counterweight filler plates in the frame, and the fixation of the plates in the frame.

g) Check of the pulleys and counterweight for pulling the overspeed governor:

+ Condition of movable joints of counterweight frame;

+ Protection for pulleys;

+ Rope slack control device.

h) Check of sheaves, rope directions, and protective shields.

i) Check of the rope ends fixed on both the car and the counterweight.

k) Overall check of the environmental and operating conditions of the lift.

Interpretation of the results: The examination results are qualified when the lift has complete and synchronized details and components according to regulations, is installed according to the lift manufacturer's design, and no damage, defects or abnormalities are detected, and it meets the requirements in this Clause.

3. Step 3: Check and assessment of the technical conditions of parts and details of the lift

The examination and assessment of the technical conditions of the lift must be fully carried out by the inspector regarding the following items:

a) Check of the well

- Check of the equipment that must be in the well: Assessed under Point 2.1.1.6 QCVN 02:2019.

- Check of other equipment installed in the well: Assessed under Point 2.1.1.2 QCVN 02:2019.

- Check of the pit environment: Pit floor cleaning, water infiltration, lighting: Assessed under Point 2.1.1.16 QCVN 02:2019.

- Check of the cover of the well: Assessed under Points 2.1.1.11, 2.1.4.6, 2.1.4.7 and 2.1.4.8 QCVN 02:2019.

- Check of exits and examination doors: Assessed under Point 2.1.3 QCVN 02:2019.

- Horizontal distance from the inner surface of the well wall to the door sill, the car door frame or the outer edge of the landing doors: Assessed under Points 2.1.4.7, 2.2.10, 2.2.11 and 2.2.12 QCVN 02:2019.

- Check of the device that controls the opening and closing of landing level doors: Check of the technical conditions and interlock of mechanical locks and electrical contacts: Assessed under Points 2.2.8 and 2.2.19.3 QCVN 02:2019.

- Well lighting: Assessed under Point 2.1.1.5 QCVN 02:2019.

- Well ventilation: Assessed under Point 2.1.1.4 QCVN 02:2019.

- Principal dimensions of landing doors: Assessed under Points 2.2.5 and 2.2.6 QCVN 02:2019.

- Refuge space at the top of the well: Assessed under Points 2.1.4.10 and 2.1.4.12 QCVN 02:2019. Home lifts shall be assessed under Point 3.3.1 QCVN 32:2018.

- Refuge space in the pit: Assessed under Points 2.1.4.11 and 2.1.4.12 QCVN 02:2019. Home lifts shall be assessed under Point 3.3.2 QCVN 32:2018.

- Means of access to the well: Assessed under Point 2.1.2 QCVN 02:2019.

- Check of the buffers: Assessed under Point 2.7 QCVN 02:2019.

b) Machine room and equipment inside the machine room (not applicable to machine room-less lifts).

- Check of the machine room and equipment in the machine room: Assessed under Point 2.1.1.2 QCVN 02:2019.

- Check of means of access to the machine room, the elevations in the machine room, railings and stairs): Assessed under Point 2.1.2.4 QCVN 02:2019.

- Check of the installation location of machine assemblies and electrical cabinets, measurement of the safe distances between them and with construction structures in the machine room: Assessed under Point 2.9 QCVN 02:2019.

- Check of the environment in the machine room (temperature, lighting, ventilation): The temperature inside the machine room must be maintained between +5 °C and +40 °C. Lighting and ventilation shall be assessed under Points 2.1.1.4 to 2.1.1.16 QCVN 02.2019:2019.

- Check of means of access to the machine room: Doors - door locks, assessed under Points 2.1.3.2.1 and 2.1.3.3 QCVN 02:2019.

- Machine room lighting: Assessed under Points 2.1.1.5.4 and 2.1.2.2 QCVN 02:2019

c)  Car and equipment inside the car

- Principal dimensions of car doors: Assessed under Points 2.2.5 and 2.2.6 QCVN 02:2019.

- Principal height inside the car: Assessed under Point 2.3.1 QCVN 02:2019.

- Rated load and maximum area of the car: Assessed under Points 2.3.2 and 2.3.3 QCVN 02:2019.

- Instructions for use and response to incidents in the lift: Assessed under Point 2.3.5.4 QCVN 02:2019.

- Contact phone number of the responsible person: Assessed under Point 2.3.5.5 QCVN 02:2019.

- Emergency communication system.

- Check of the emergency exits on the car roof: Assessed under Point 2.3.10 QCVN 02:2019.

- Check of the safe distance between the car and the counterweight, including the protruding parts of the two above parts, which shall be not less than 0.05 m.

- Check of electric safety devices controlling opened and closed position of car doors: Assessed under Points 2.2.17; 2.2.18; 2.2.19; 2.2.20; 2.2.24; 2.2.27; and 2.2.28 QCVN 02:2019

- Check of the clearance between the two car doors and between the door and the car frame: Assessed under Point 5.3.1.4 TCVN 6396-20:2017.

- Check of the technical conditions and operation of the door anti-jamming device: Assessed under Points 2.2.17; 2.2.18; 2.2.19 and 2.2.20 QCVN 02:2019.

- Check of the horizontal safety distance between the car door sill and the landing door sill (this value shall not be more than 35 mm).

- Overload warning device: Assessed under Point 2.10.6.1 QCVN 02:2019.

- Landing position indicators, stopping accuracy: Assessed under Points 2.3.4.4.1, 2.10.3 and 2.10.4 QCVN 02:2019.

- Door locking: Assessed under Point 2.2.14 QCVN 02:2019.

- Car lighting: Assessed under Points 2.2.21 and 2.3.14 QCVN 02:2019.

- Ventilation: Assessed under Point 2.3.13 QCVN 02:2019.

d) Ascending car overspeed protection means

- The overspeed governor:

+ On the overspeed governor, the following parameters must be written: Operating speed corresponding to the lift's rated speed, year of manufacture and manufacturer.

+ On the overspeed governor, the direction of rotation must be marked corresponding to the operating direction of the safety gear.

Check of the operation of the overspeed governor.

+ For the lifts subject to first-time examination, the overspeed governor must still have the manufacturer's lead seals intact. When the lift is put into service, if the device must be calibrated, the calibration must be fully recorded in the maintenance logbook and the person in charge of such calibration must sign off and clearly state his/her full name.

+ The safety electrical contact of the overspeed governor must be closed most of the time when the lift is in service. When the electrical contact is disconnected, the lift must be stopped.

- The safety gear: Assessed under Points 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.5.8, 2.5.9, and 2.5.10 QCVN 02:2019

- Steel wire ropes:

+ Assessed under Point 2.5.11 QCVN 02:2019.

+ For wire ropes that do not meet the requirements, they must be assessed and removed under Appendix E to TCVN 7550:2005.

dd) Counterweights and balancing weights, suspension means, compensation means, and related protection means.

- Cabin suspension device, counterweight or balancing weight: Assessed under Points 2.4.2 and 2.4.4 QCVN 02:2019.

- Sheaves and pulleys: Assessed under Points 2.4.3, 2.4.13 and 2.4.15 QCVN 02:2019.

e) Driving machines and associated devices

- Driving machine and method: Assessed under Point 2.8.11 QCVN 02:2019 for electric lifts or Point 2.8.15 QCVN 02:2019 for hydraulic lifts

- Brake system (technical conditions of brakes, brake pads, brake springs): Assessed under Point 2.8.3 QCVN 02:2019.

g) Control system, safety devices

- Check of electric devices: Assessed under Point 2.9 QCVN 02:2019.

- Check of the control system and limit switches: Assessed under Point 2.10 QCVN 02:2019.

h) Guide rails: Assessed under Point 2.6 QCVN 02:2019.

i) Rescue system

- Manual rescue: Assessed under Point 2.11.1.1 QCVN 02:2019.

- Electric rescue: Assessed under Point 2.11.1.2 QCVN 02:2019.

- Rescue procedures: Assessed under Point 2.11.1.4 QCVN 02:2019.

k) Insulation and ground resistance

- Insulation: Assessed under Table 16 TCVN 6396-20:2017.

- Check of the ground resistance measurement results: ≤ 4Ω (under TCVN 9358:2012).

4. Step 4: Test operation of the lift

a) Load-less test:

Let the lift operate and the car go up and down 3 cycles, then observe the operation of the parts.

INTERPRETATION OF THE RESULTS: Results are qualified when the devices operate according to design features and no abnormalities are detected.

b) Dynamic load test at 100% of rated load:

Load the car evenly on the car floor, operate the lift at rated speed and check the following parameters:

c) Dynamic load test at 125% of rated load:

Load 125% of the rated load evenly on the car floor at the top stop, let the lift run downwards and check:

d) Test of the rescue device:

dd) Test of rescue alarm device:

e) Check of the overload protective device: Assessed under Point 2.8.3.2.4 QCVN 02:2019.

g) Test of the counterweight safety gear (if any): The testing methodology and assessment under Point 4.2.3.2 TCVN 6904:2001.

h) Test of the buffers: The testing methodology and assessment under Point 4.2.5 TCVN 6904:2001.

i) Test of pressure: The testing methodology and assessment under Point 4.2.6 TCVN 6905:2001 (applicable to hydraulic lifts).

k) Test of special operating programs of the lift (if any):

- How the lift operates when there is an incident: Fire, earthquake;

- Priorities.

l) INTERPRETATION OF THE RESULTS: The examination results are qualified when the lift has complete and synchronized details and components according to regulations, is installed according to the design, and no damage, defects ỏ abnormalities are detected, and it meets the requirements in this Clause.

5. Step 5: Handling of examination results

a) Prepare an examination record with all details made using the sample specified in the Appendix hereto.

b) Approve the examination record

Those who are involved in approving the examination record must include at least the following:

- Representative or authorized person of the employer;

- Person appointed to participate and witness the examination;

- Inspector carrying out the examination.

When the record is approved, the inspector, the witness of the examination, the representative or the person authorized of the life employer shall all sign off and stamp (if any) the record. The examination record shall be made in two (02) counterparts, each of which shall be kept by the representative, or the person authorized of the life employer and the inspector performing the lift examination.

c) Record briefly the examination results in the lift documentation (the full name of the inspector and the date of examination shall be clearly stated).

d) Enter the examination results into the database in order to print examination stamps and the certificate of examination results (if required).

dd) Affix the examination stamp: When the lift’s examination results meet technical safety requirements, the inspector affixes an examination stamp to the device. The examination stamp must be affixed in an easily observable position.

e) Issue a certificate of examination results:

- When the lift has examination results that meet safety technical requirements, the examination body shall issue a certificate of examination results for the lift within 05 working days from the date of approval of the examination record.

- When the lift's examination results do not meet the requirements, it shall only carry out the steps mentioned in Points a and b, Clause 5, Article 8 of this Procedure and only issue the examination record to the lift employer, which must clearly state the reasons why the lift does not meet examination requirements, recommendations for corrective action and time limit for implementing those recommendations. At the same time, it shall send the examination record and notify the local labor authority in the locality where the lift is installed and used.

Article 9. Technical safety examination frequency

1. Periodic safety technical examinations for lifts installed in apartment buildings, offices, shopping malls, hospitals, hotels, manufacturing plants or in public areas shall be conducted twice (02) a year.

2. Periodic safety technical examination for lifts installed in structures other than those mentioned in Clause 1 of this Article shall be conducted after every three (03) years.

3. Periodic safety technical examination for lifts that have been in service for more than 15 years shall be conducted once a (01) year.

4. Depending on the conditions in terms of equipment, the technical safety examination frequencies stated in Clauses 1, 2 and 3 of this Article may be shortened at the discretion of the inspector on the basis of agreement with the organization or individual that owns or manages the lift. In case of shortening the technical safety examination frequency, the inspector performing the examination must clearly state the reason for the shortening in the examination record.