In the case of national technical regulations and national standards cited in the testing process can supplement, modify or replace the application as stipulated in the latest text.
The testing of the technical indicators on the system's secure supply of liquefied petroleum gas in place civil consumption may apply different standards at the request of the user base, making the condition Such criteria must have the technical criteria of safety equal to or higher than the norms specified in the national standard be invoked in this process
3. TERMINOLOGY, DEFINITIONS
This process uses the terms and definitions of the above referenced documents and some terms and definitions in this process is understood as follows:
3.1. Liquefied petroleum gas (LPG):
These are products derived hydrocarbon oil is the main ingredient of propane (C3H8) or butane (C4H10) or a mixture of these two categories. At temperature, normal pressure in gaseous hydrocarbons and when this is compressed to a certain pressure or cooled to the right temperature, they can turn to liquid.
3.2. The system provides liquefied petroleum gas (LPG) consumption in residential places:
As the system uses vehicle, specialized equipment used to supply LPG from fixed tanks and LPG cylinders gantry system directly through LPG pipelines serving residential, condominium, apartment house mix - office, residential - other functions.
3.3. Technical testing safety first:
As the assessment of technical safety condition prescribed system of national technical regulations and standards of safety techniques after installation and before being put into use for the first time.
3.4. Technical expertise periodic safety:
As assessment activities thuai state of the safety of the system according to the national technical regulations, standards and technical safety check expiration of a predetermined time.
3.5. Technical Safety Inspection unusual:
As the assessment of technical safety status of the system according to the national technical regulations, standards and technical safety:
After repair, upgrade or renovation may affect the safety of technical availability of the system;
After changing the installation position;
When using the system have ceased operation for 12 months or more;
Upon request of the establishment or the competent authorities.
4. INSPECTION STEPS
When testing the safety engineering system provides liquefied petroleum gas ( LPG ) consumption in residential places and organizations secure technical expertise to perform the following steps in turn :
Check profiles , resumes and equipment ;
Technical inspection outside , inside ;
Check technical testing;
Check operation ;
Handling of inspection results .
Note : The next step test is conducted only when the test results in the previous step unsatisfactory. All the test results of each step must be fully recorded in the field notes in the form prescribed in Annex 01 and stay fully in accrediting organizations .
5. EQUIPMENT AND INSTRUMENTS FOR INSPECTION
The device, service verification tools must fit the object inspection and must be tested and calibrated as prescribed, including:
5.1.Thiet equipment and utensils served search:
Lighting equipment with voltage of less than 12V source, if the system is working with solvents used to light fire and explosion safety.
Backcheck with weight from 0.3 kg to 0.5 kg;
Magnification magnifier suitable grass;
Measuring instruments, mechanical: Rulers pair, tape measure;
Testing Equipment inside: endoscopic equipment;
5.2. Equipment and tools in test reliability, test-contained:
Equipment generate pressure with technical characteristics (flow, pressure) suitable for test subjects;
Vehicles, equipment and check the tightness.
5.3. Devices, measuring instruments:
Manometer with precision and scale levels consistent with test pressure.
5.4. Devices, measuring instruments, testing other field (if necessary):
- Ultrasonic Testing Equipment thickness:
- Equipment check weld quality.
6. CONDITIONS tested.
Conduct examinations gas supply system of liquefied petroleum gas (LPG) at the place of consumption to ensure the civil following conditions:
6.1. The system provides liquefied petroleum gas (LPG) at the place of consumption in a state of civil right ready for inspection.
6.2. Records and documents of the system supply of liquefied petroleum gas (LPG) at the place of consumption to full civil.
6.3. Environmental factors, the weather did not affect the results of inspection.
6.4. The conditions on labor safety and hygiene must be met in order to test the system provides liquefied petroleum gas (LPG) consumption in residential places.
7. PREPARATION OF EXPERTISE
Before conducting the inspection provides liquefied petroleum gas (LPG) in place civil consumption must perform the following preparations:
7.1. Unified inspection planning, preparatory work and coordination between accreditation organizations with premises, including the following:
7.1.1. Preparing documents system provides liquefied petroleum gas (LPG) consumption in residential places.
7.1.2. Remove the solvent, solvent removal proceed in the system provides liquefied petroleum gas (LPG) consumption in residential places, to ensure no impact to the conduct of the examination. (Discharging, discharging LPG by specialized equipment, which measures the safe handling, not be discharged directly into the environment.)
7.1.3. Remove the door who get, the door of the toilet tank (if any).
7.1.4. Toilet inside, outside of system devices supply of liquefied petroleum gas (LPG) consumption in residential places.
7.1.5. Preparation works for the review ensures all parts of the system.
7.1.6. The average system under difficult ground if they must consider applying appropriate inspection measures.
7.1.7. The comment in the oil and gas supply system mohoa liquid (LPG) consumption in residential places have electric heating unit or moving parts must be separated out of the bottle.
7.1.8. Prepare terms of manpower, materials for testing; appoint persons to participate and witness the testing.
7.2. Check profiles, system profile provides liquefied petroleum gas (LPG) consumption in residential places.
Based on the inspection form to inspect and review the records and documents of the following specifications:
7.2.1. When testing the safety techniques for the first time:
7.2.1.1. Background checks of the comment in the system provides liquefied petroleum gas (LPG) in place civil consumption: According QCVN: 01-2008 - BLĐTBXH, noting consider the following documents:
Indicators of metal fabrication, metal welding;
Stress calculation for pressure parts;
Drawings structure inscribed with main dimensions;
Operating manuals, maintenance and repair;
Certificate of conformity by organizations designated as prescribed level, in case the competent authorities issued the national technical standards for the subjects tested.
7.2.1.2. Profile of the war in ex-factory system provides liquefied petroleum gas (LPG) consumption in residential places:
The quality inspection certificate in metal fabrication, metal welding;
Result check weld quality;
Minutes of the factory testing;
Where is the factory of the other parts of the system in detail;
Drawings tenet system provides liquefied petroleum gas (LPG) consumption in residential places.
7.2.1.3. The reported outcome measurement device calibration; inspection records earthing, lightning protection, protection devices (if any).
7.2.1.4. Profile installation provides liquefied petroleum gas (LPG) consumption in residential places:
Facility Name and facility installation and use;
Design, installation, completion drawings;
Characterization of these additional materials to installation;
The welding data, such as welding technology, welding rods RNA brand, name welder and test results of welds;
The minutes of testing each part of the system, (if any);
Overall test records system;
Profile of approved fire protection authorities of the PCCC;
The rules and standards of rooms command fire.
7.2.2. When testing the safety techniques periodically:
7.2.2.1. Background, records, records verification and certification testing times before.
1222. Profile of user management, operation and maintenance; inspection records, test (if applicable).
7.2.3. When testing the safety techniques extraordinary:
7.2.3.1. Where the repair, renovation and upgrades: Profile Design repair, renovate, upgrade, test records after repair, renovate and upgrade.
7.2.3.2. In case of changing the mounting position: Consider installing profile.
7.2.3.3. Where, after the system provides liquefied petroleum gas (LPG) consumption in residential places not work for 12 months or up to examine the dossiers as safety technical inspection periodically.
Darih price record results and curriculum vitae: Results satisfactory when:
Profile of the full pressure vessels and meet the Article 2.4 of QCVN 01 -2008 / BLĐTBXH
Without guarantees, the establishment must have additional remedies under Article 3.2.2 of QCVN 01-2008 / BLĐTBXH.
7.3. Prepare complete testing means suitable to serve the process of accreditation.
7.4. Construction and uniform implementation of measures to ensure the safety of the facility before testing. Fully equipped with instruments and means of personal protection, safety in the accreditation process.
8. conduct examinations
When conducting the inspection system must comply with the following sequence:
8.1. Technical inspection outside:
8.1.1. Space, distance, location of the tank installation, the orchestra put manifolds
8.1.2. Lighting system and safe operation of explosion prevention.
8.1.3. Working platform, stairs, pylons, ...
8.1.4. System electrical safety grounding, lightning.
8.1.5. Check the specifications on the label of the bottle in the system and the system with the designs and resume.
8.1.6. Check the status of safety equipment, and auxiliary measurement of the amount, type, technical parameters compared with the design and regulatory standards.
8.1.7. Check the type of pipe, valves, piping and installation of spare parts on the system in terms of quantity, type, technical parameters compared with the design and regulatory standards.
8.1.8. Check the status of other auxiliary devices attached to serving the working process of the system.
8.1.9. Check the condition of the welds, metal surfaces under pressure parts. When in doubt, request the facility to apply additional inspection measures appropriate to assess more accurately.
8.1.10. Check the details pairing.
1.8.11. Check the cooling system, test equipment LPG leakage warning and fire-fighting vehicles ...
8.1.12. For systems with manifold provide attention bottle test rig ventilation systems for bottle storage.
Evaluation of results: satisfactory result if:
For the average pressure in the system: To meet the rules under Section 3 of ISO 6155: 1996, meets the provisions under Section 8 of ISO 8366: 2010;
For the system to meet the provisions under Section 4 of the ISO 7441: 2004;
No cracks, bulging, dented, corroded too regulated, open sauce solvent traces in the parts under pressure and in the welds, joints.
8.2. Technical Check inside:
8.2.1. Check the condition of the metal surface pressure parts.
8.2.2. Check the status of residue, rust, corrode the metal inside of the parts under pressure.
8.2.3. Check the condition of the welds, metal surfaces under pressure parts. When in doubt, request the facility to apply additional inspection measures appropriate to assess more accurately.
8.2.4. For location search can not be conducted inside the test performance, technical status must be made according to volume, method and sequence checking in technical documentation of the manufacturer.
8.2.5. Where the pressure vessels in the beam pipe system, if in doubt about the technical condition of the area, they must require tube removed piecemeal basis or the whole place to test-tube
8.2.6. With no ability to check the inside due to the structure of the system, allowing substitute checks inside with reliable test with test pressure regulation and check the parts can be searched.
Evaluation of results: satisfactory result if:
For the average pressure in the system: meet the rules under Section 3 of ISO 6155: 1996, meets the provisions under Section 8 of ISO 8366: 2010.
No cracks, bulging, denting, corrosion than specified in the parts of the system under pressure.
8.3. Technical inspection and testing.
8.3.1. The average pressure in the system is reliable when tested dirih free test if the test for the first time less than 18 months to ship, well preserved, while transporting and installing no expression was shock, deformation. Expertise records must indicate the reason and try dirih records accompanying shipments of manufacturing facilities, installation of test records (if any).
8.3.2. If the system has structural parts working at different pressure levels can be separated and tried separately for each part.
8.3.3. When checked, measures must be taken to ensure the isolation of automatic protection devices, measuring not damaged in case of pressure thu.Trongtruong not guarantee they must remove the devices off.
8.3.4. Try durable.
The trial period lasting no more than 6 years, in case dirih abnormal test must be conducted to try strength
8.3.4.1. Environment reagent is liquid (water, non-corrosive liquid, non-toxic), air or inert gas, ambient temperature below 50 ° C reagents and temperatures not lower than ambient than 5 ° c. .
8.3.4.2. Pressure, time pressure maintenance test specified in Table 1.
Table 1
Pressure, while maintaining reliability test pressure liquid
|
Device Type |
Test pressure ( bar)
|
Retention time ( minute )
|
|
tanks |
1,5 Ptk or 27 |
0 |
|
Vaporization equipment
|
1,5 ptk |
05 |
|
Liquid Pipelines |
1.1 times the book value of the safety valve
|
>15 |
|
Steam pipe P | V > 1 bar |
> 10,5 |
> |
|
Steam pipe 0.03 bar < PJV < 1.0 bar |
1,05 |
>1 |
|
Steam pipe P | V < 0.03 bar |
0,75 |
>15 |
P | V - Working pressure . ptk - Design pressure
|
Pressure , while maintaining reliability in gas pressure test
Test pressure ( bar)
|
P | V - Working pressure. ptk - Design pressure.
8.3.4.3. Reliability test sequences:
8.3.4.3.1. Refrigerant load test: full lips Load reagents into the system. (The exhaust note when testing liquid)
8.3.4.3.2. Increasing pressure to test pressure (note rose slowly to avoid sudden expansion equipment damage and prohibit knocking at the test pressure hammer). Monitor and detect abnormal phenomena during the test.
When tested by pressure gas lift attention adherence 6.1.3.4 ISO 7441: 2004.
8.3.4.3.3. Maintaining the prescribed test pressure.
8.3.4.3.4. Reduced pressure from the pressure from work, keep this pressure during the test. Then reduce the pressure on (0); overcome the shortcomings (if any) and test results overcame.
8.3.4.4. The test gas is only allowed when there are good results of the technical inspection on the outside, inside and check to calculate reliable database on direct measurements on the system.
- When the test gas must apply safety measures below:
+ Valve and pressure gauge on the air intake pipe to give away seats to put the pipe or pipe outside the chamber ;
+ During the test gas pressure , who do not have a duty to avoid a safety.
- Check the tightness with soapy solution or by other measures .
Evaluation of results : The results satisfactory when :
- No cracking phenomenon ;
- Do not seek out air bubbles , spray , drip through the welds , joints ;
- No detection of distortion ;
- The pressure drop allowed during pressure maintenance test : < 0.5% of the test pressure .
8.3.5.Thu closed :
8.3.5.1 . Refrigerant testing : The air or inert gas .
8.3.5.2 . Pressure , time pressure maintenance test specified in Table 2 .
Table 2 : pressure , while maintaining tight test
Liquid Pipelines |
Test pressure ( bar) |
Retention time ( minute ) |
|
Tanks |
7,5
|
Staying in the inspection process , but not less than 30 minutes
|
|
Vaporization equipment
|
7,5
|
Staying in the inspection process , but not less than 30 minutes |
|
Liquid Pipelines |
7,5
|
Staying in the inspection process , but not less than 30 minutes |
|
Steam pipe P | V > 1 bar |
7,5
|
Staying in the inspection process , but not less than 30 minutes |
|
Steam pipe
|
1,05
|
Staying in the inspection process , but not less than 30 minutes |
|
|
|||
Steam pipe P|V ^ 0,03 bar
|
0,75
|
|
Note:
- Time to try sealed maintenance ensures the stability of reagents and pressure connection test time.
8.3.5.3. Load reagents into the system environment and increased pressure to test pressure.
8.3.5.4. Detecting leaks using soap solution or by other measures.
Evaluate the results: Try contained satisfactory when:
No gas leak detection;
Pressure drop allowed during pressure maintenance test: <0.5% of the test pressure.
8.4. Check operation
8.4.1. Check the full range of conditions to be able to put the system into operation.
8.4.2. Check the status and working parameters of the system and the associated accessories (note the pressure after pressure relief valves); the work of the measurement devices and protection; .
8.4.3. Safety valve calibrated and sealed as follows:
- For tank: The pressure of the safety valve set pressure design;
- For average evaporation: The pressure of the safety valve set not more than 1.15 times the working pressure is greatest;
- For liquid pipelines: pressure relief valve set to 24 bar;
- For steam lines: pressure safety valve set not more than 1.15 times the working pressure is greatest.
Evaluation of results: The results achieved when the system requirements, the auxiliary equipment and measuring devices protect normal work, the working parameters stabilize.
9. HANDLING OF INSPECTION RESULTS
9.1. Making records with complete testing content in the form prescribed in Appendix 02 issued together with this process.
9.2. Through expertise records:
Participants expertise records through mandatory minimum must include the following members:
- Representing the basis or the basis of the authorization;
- Persons assigned to participate and witness testing;
- Check users perform testing.
As the minutes passed, auditors, participants witnessed verification, represent the basis or the basis of authorization signed and sealed (if any) in the minutes. Minutes of the inspection shall be made in two (02) copies, each party is responsible for keeping one (01).
9.3. Record inspection results summarized on system resume supply of liquefied petroleum gas (LPG) in place civil consumption (full name auditors, date of inspection).
9.4. Paste stamps: Check users stamping inspection when the system supply of liquefied petroleum gas (LPG) consumption in residential places unsatisfactory. The stamp is affixed easily observed location.
9.5. Certification inspection results:
9.5.1. When the system provides liquefied petroleum gas (LPG) at the place of consumption accredited civil engineering satisfactory safety inspection organizations certified testing results for system supply oil and gas liquefied petroleum (LPG) consumption in residential place within 05 working days from the date of adoption of the minutes of the inspection at the facility
9.5.2. When the system is calibrated not meet the requirements, then just follow the steps 9.1, 9.2, and only to establishments expertise records, which must clearly state the reasons for unsatisfactory system testing, recommendation engine recovery basis and duration of implementation of such recommendations; also sent inspection records and notify the state agency for local labor where installation and use of the system
10. DURATION OF EXPERTISE
10.1. Term Safety Technical testing recurring 02 years. For systems used in 12 years, the time limit is calibrated at 01 years.
10.2. Where the manufacturer specified or required facility inspection period is shorter, comply with the provisions of the manufacturer and request the establishment.
10.3. When shortening the testing period, auditors
