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Since CNG cylinders are considered as high priority safety elements in cars, they need to comply with the requirements assigned in national and international standards such as ISO 11439, ECE-R110 and ISIRI 758. Compliance with these standards is checked during production inspections, testing all cylinders throughout the production line and examining a number of randomly chosen samples out of any product batches by the use of advanced equipment and under supervision of authenticated inspectors of the Institute of Standards and Industrial Research of Iran. The examinations must be programmed in such discipline that the results could account for the natural characteristics, service life and physical and chemical specifications of the product with an appropriate confidence level. CNG cylinders are designed in observance of some technical aspects such as the cylinder’s pressure in function, number of fill-empty cycles in its service life and its exposure to flammable natural gas. Also, the useful time of the cylinder needs to be longer than the vehicles.

Asia Nama’s laboratory is equipped as to fulfill the company’s QC requirements. Licensed as a “Cooperating Laboratory in CNG Cylinder Manufacturing Industry” by the Iranian Standard Institute, the facility is capable of accomplishing all the required tests regarding the cylinders’ mechanical, metallurgical, functional and chemical specifications, as explained below:

Mechanical tests are accomplished by the use of the following devices:

  • Charpy Impact Tester” can be used by up to 500 Jules of power to measure the amount of energy a cylinder absorbs in a breakage.
  • Universal Testing Machine” is capable of accomplishing a variety of tests such as tensile test, three-point bending test and pressure test on the samples with a 100 ton capacity. It can also analyze parameters such as tensile strength, compressive strength, yield strength and relative length increase percentage.
  • Bending Test Machine” is for inspection of the bending pattern of cylinders.
  • Brinell Hardness Tester” is also another machine for accomplishment of the mechanical tests.

Metallurgical tests are conducted by the use of the following devices:

  • Cutting machine
  • Hot Mount
  • Polish
  • Metallurgical Microscope

Chemical tests are performed by the use of the following device:

  • Desktop Metal Analyser (ARUN)” can be used to analyze and determine the type and components of steel.

There are also other chemical inspections to control the chemical processes during the production of cylinders.

Specific functional tests are as follows:

Cycling Test:

The test is performed to determine the service life of the cylinders. In the test, the cylinders are pressured by an alternating pressure of 20-260 bar in ambient temperature. In this condition, the cylinder is expected NOT to leak or break before it completes 15000 cycles (which is an average service life for CNG cylinders).

Burst Test:

The test is performed to determine the resistance of cylinders against hydrostatic pressure before breakage. The cylinders are supposed NOT to break under a pressure lower than 450 bar.  

Penetration (Gunfire) Test:

The test is performed to make sure the cylinders won’t burst or break against penetration of a bullet. In the test, a cylinder pressurized under 200±10 bar with compressed gas is gun-fired by a single bullet of 7.62 mm or bigger. The cylinder is supposed NOT to burst or rupture.

Bonfire Test:

The bonfire test is performed to make sure of the appropriate function of the cylinder’s safety valve and its timely pressure relief of the cylinder when in bonfire. The cylinder is supposed NOT to burst in this condition.

Leak before Break (LBB) Test:

The test is performed to make sure the cylinders would not rupture as pressurized under high pressure cycles. The test is accomplished by the use of cycling test machine through 20-300 pressurized cycles which continue until the cylinder starts to leak.  

Before the production is officially launched, any cylinder type in question needs to achieve the type approval certificate on the basis of a number of specific tests. Also, the product batches need to be tested under supervision of an internationally authenticated company’s delegates during the mass production process.

Type Approval Tests

Type #1 CNG cylinders are to be evaluated by a number of particular tests such as below:

  • Chemical Analysis of Steel: The test is performed to determine the type and components of steel.
  • Tensile Test: The tests is performed in ambient temperature in accordance to standard ISO 6892-1 in order to evaluate the physical parameters such as tensile strength, compressive strength, yield strength and relative length increase percentage of the sample.
  • Charpy Impact Test: The test is accomplished in accordance to standards ISO 148 in -50°C.
  • Sulfide Stress Cracking Test (SSC): The tests is performed in accordance to NACE TM0177 in order to evaluate the resistance of cylinders in a corrosive sulfide environment.
  • Ambient Temperature Pressure Cycling Test
  • Hydrostatic Test
  • Leak before Break Test
  • Penetration Test
  • Bonfire Test

Coating Tests include:

  • Paint Adherence
  • Impact
  • Bending
  • Chemical Resistance
  • Salt Spray
  • Exposure to UV Emission
  • Exposure to Pressurized Spray of Particulates

All Inclusive Tests

After type approval, during mass production, the following tests are accomplished on every cylinder on the line:

  • Brinel Hardness Test: The test is accomplished in accordance to ISO 6506 standard.
  • Hydrostatic Pressure Burst Test: The test is accomplished to measure the permanent volume increase of the cylinder as pressurized under 1.5 times higher than its normal operational pressure.
  • Leakage Test: The test is to inspect any possible leakage out of the cylinder’s end.
  • Non-Destructive Ultrasonic Inspection: The test is to inspect the thickness of the cylinder wall and ensure the wall is clear of any cracks and defects.
  • Non-Destructive Magnetic Inspection: The test is to ensure that the cylinder is clear of any cracks and defects in bends and head-thread.
  • Measurement of Dimensions, Marking and Appearance Evaluation.

Product Batch Tests

Product Batch tests are accomplished on randomly chosen cylinders out a group of produced ones. These tests include:

  • Tensile test in ambient temperature
  • Charpy Impact Test in -50°C
  • Hydrostatic Burst Test
  • Ambient Temperature Pressure Cycling Test
  • Paint Adherence Test
  • Paint Thickness Test
  • Dimension Checks in Accordance to Manufacturing Drawings

Mandatory Standard Sign Application license

After successful completion of all tests, the result sheets, the drawing documentation, the stress analysis reports and all related drawing are confirmed by the official supervisor and delivered to the Institute of Standard and Industrial Research of Iran where the company’s Mandatory Standard Sign Application License for mass production is issued. For the time being, Asia Nama Company has obtained the Iranian standard sign application licenses for the production of cylinders with 35, 52, 57, 60, 62, 75 and 113 units of capacity which are all approved by TUV NORD COMPANY.

Products & Services

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Asia Nama Group as the biggest manufacturer of preform and compressed natural gas cylinders In Islamic Republic of Iran and region, is with human and

economical vision to invest 50 million Euro in order

to contrast the cylinder according to the ISO 11439 standard.

Asia Nama company in order to achieve the highest quality and compete

with the biggest producers in Europe to buy most advanced equipment

from Germany and part of South Korea.

In addition to the standard of Germany TUV, has the most advanced technology in

CNG industry.

Target & Strategy

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Target of ACNN National and Strategic Project

According to a number of infrastructural reasons such as high age-average of the vehicles in use, old fashioned production technologies in manufacturing excessively consuming engines, inadequate infrastructural facilities for more economic transportation systems and highly subsidized fuel price, consumption rate of the fossil fuels in Iran are pretty higher than the international standards. On the other hand, the existing production capacity limits of the country’s refineries have led to the procurement of a considerable portion of the vehicles’ fuel supply from overseas resources; the fact which imposes an excessively costly burden upon the country’s economy.

On the basis of the above status quo and in order to accomplish the national strategic policies in the energy section and have the common fossil fuel substituted by CNG (compressed natural gas), the Ministry of Oil assigned the Iranian Fuel Conservation Company right after its establishment to implement the National Plan of “CNG Management”.

The executives of the national plan of “CNG Management” are trying to introduce CNG as an efficient and logical alternative fuel to regulate the rampant rate of petrol and gasoline consumption by vehicles, place a reducing control upon the import of these products and take steps towards the localization of CNG industry. In order to achieve this goal, we need to consider a number of policies as listed below:

- Making use of more appropriate alternative fuels

- Reducing petrol imports and preventing outflow of currency

- Overcoming the international economic sanctions in order to make petrol sanctions ineffective

- Reducing environmental pollutants

- Reducing waist of the national fossil fuel resources

- Increasing families’ purchasing power by the implementation of “Targeted Subsidies Plan” and increasing the price of Forms of Energy.


As time goes by, machine-life issues and dependency on diverse technologies tend to prove more tangible and sometimes even intolerable in different dimensions of people’s life. Automotive industry has got an outstanding position on this ground: lots of facilitations have been made but a lot of difficulties have come across as well (e.g. air pollution majorly), so that in developed societies people welcome a certain day as the “Car Free Day”.

A few solutions to these problems have been figured out, one of which is substitution of fossil fuels by CNG, as effective as it’s assumed to be in the reduction of environmental pollution.

Some characteristics of compressed natural gas (CNG) in comparison to other fuels have given gas burning vehicles advantages upon other types. To name a few we may consider gas-burning engines’ less exhaust of suspended particulate matter (spm) in air, more controlled emission of poisonous and harmful pollutants, considerable reduction in the amount of emitted Sulfur Oxide and Sulfur Dioxide and also cheaper fuel price. Besides, CNG engines produce less noise and run with less vibration as compared to diesel ones.

CNG also has other advantages to be named as quality and efficient combustion, high Octane rate and less emission of Carbon Monoxide and unburned Hydrocarbons. CNG engines are also more secure in car accidents. As a relatively lighter matter, CNG leakage will ascend and disperse into the air, while other fuels will remain as flammable spots on the ground for some time. Besides, CNG has a spontaneous combustion degree of 650 C as compared to that of 350 C for petrol.

In spite of all these advantages, CNG engines have got some disadvantages in comparison to fossil fuel burning ones as well, such as relatively costly distribution and storage, more expensive station construction, more expensive vehicles, shorter distance coverage, extremely heavy mounted tanks and more complicated and problematic executive procedures.

Despite the above mentioned disadvantages, the abundance and low price of this fuel have made CNG a prevailing common car fuel in many countries.

Adequate resources, quality combustion and compliance of its exhaust rate with the environmental regulations have made CNG the main alternative fuel in the most parts of the world. Considering its low energy density, CNG needs to be capsulated in accordingly-designed metal or composite cylinders under 200 bar compression to be used as car fuel.

Quality Control

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Natural gas needs a 200 bar compression in order to be consumed as vehicle fuel. This high pressure in vehicle’s fuel system and all related devices such as pumps and compressors calls for observation of high standard safety requirements.

Accordingly, Asian Nama CO. has purchased a number of full automatic quality control devices in compliance with ISO11439 (CNG cylinder manufacturing essential requirements standard). All of this machinery will have TUV standard and the product will obtain all the due international and national standard certificates.

Asia Nama Co. will establish the biggest and the most highly equipped quality control and periodical tests laboratory in the region.

In order to achieve the highest quality, Asia Nama people accomplish many different tests from the moment the raw material and primary parts are delivered in onto the moment the final product is dispatched to the customer and even after.

Test Series #1: Mid-production quality tests - accomplished completely on 100% of all cylinders.

Test Series #2: Destructive tests – implemented in laboratories in addition to mid-production non-destructive ones.

Safety Approval Tests: This last series of cylinder safety approval tests are accomplished on some randomly chosen cylinders out of any group of final products.

Message from CEO

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In the name of the Unique Creator

As a blessed nation with one of the largest reservoirs of natural gas, the Islamic Republic of Iran has been thankful for this divine endowment by the establishment of the world’s largest CNG burning engines fleet.

Asia Nama’s mission for future generations is to preserve national assets and protect the environment by optimized and programmed use of these valuable and massive economic potentials. This target has been brought into practice by the endeavors and direct investment of Bank Sepah in the establishment and commissioning of one of the largest CNG and pressurized tank manufacturing factories in Iran, ANCC (Public J.S), as a glittering ring stone of the country’s hi-tech industries.

From natural gas extraction and ironstone mining to the country’s nationalized steel manufacturing industry, a combination of advanced machinery and technologies have compounded into a value chain for mass production of standard, safe and economic CNG tanks.

The largest pressurized tank manufacturing factory in Iran and the region utilizes a state-of-the- art design and engineering knowledge and the newest production, testing and control facilities to provide this honorable nation with a produce of high quality. On this stage of glory, the youth and the experts of the Islamic Republic of Iran are outstanding for their knowledge and competence.

Asia Nama has managed to achieve the first ranking level among the pressurized tank manufacturers in Iran and the region due to its largest market share and production capacity, with prudence and hope upon a bright future for this beloved country, and has stabilized its premium stand in the Middle Eastern and Global economy and industrial market.

K. MoballeghNaseri (CEO and Board Member)

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  • (21) 8866 3272-4
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