ISO 9001:2015
From 1 Ltr. To 3000 Ltrs.
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Industrial Gas Cylinder

How do we differentiate various gas cylinders?

A gas cylinder or tank is a pressure vessel used to store gases at above atmospheric pressure. High- pressure gas cylinders are also called bottles. Inside the cylinder the stored gas may be in a liquid state, dissolved state, or compressed gas. Often, gas cylinders are elongated and may stand upright on a flattened bottom at one end with the valve at the top.

What are the raw materials used in the manufacturing of Gas cylinders?

Commonly used Raw Materials are: Manganese Steel & Chrome Molly Steel

What is the maximum & minimum size of cylinders you manufacture?

In the EKC group we manufacture1.0 ltr. to 3000 ltr. water capacity cylinders.

What is the maximum & minimum design Pressure of your cylinders?

It ranges from 45 bar to 1000 bar

What is manufacturing standard of your Gas cylinders

Our Cylinders are produced as per ISO 9809-1 & ISO 9809-2

Do you have approvals of cylinders as per European Norms?

Yes, Our Cylinders are approved as per Directive TPED (2010/35/EU) ADR 2017 & Directive PED (2018/65/EU) through Apragaz Belgium

What is Neck thread specification of your cylinders?

We offer Neck thread as per customer’s requirement in Various choices like ¾” NGT, 28.8 as per DIN-477, 25E as per EN 629-1, 1 1/8” 12 UNF -2B, Any Type of CGA thread. We also offer cylinders with dual Internal & External neck thread

What is the Manufacturing process of your cylinders?

Our Concave & Convex Bottom Industrial Cylinders are manufactured from Seamless Steel Tubes through Hot Spinning Process

Do you supply cylinders for all industrial gases including Hydrogen?

Yes, we supply cylinders for all compressed gases including Oxygen, Nitrogen, Argon, Helium, Carbon dioxide, Nitrous Oxide, Hydrogen, Methane and Breathing Air.

Do you supply the cylinders with accessories?

Yes, we can supply the cylinders with Neck rings installed, with valves, with valve protection cap or any type of guard.

What kind of external Finish you provide your cylinders with?

All our cylinders are coated with epoxy primer and polyurethane top coat

Can you supply DOT approved cylinders.

Yes, we can supply DOT certified cylinders from our plant in India

Can you supply the cylinder racks , bundles and cascade?

Yes, we can supply the cylinder bundles/racks/cascade as per Customer’s specification

What is the recommended life of your cylinders?

There is no fix life of gas cylinders defined in any relevant cylinder manufacturing standard. The regulatory authority in each country defines the frequency of periodic inspection / testing and requalification of the cylinders.

Are there specific Color Codes for different Gas Cylinders?

Different countries have different gas color codes but attempts are being made to standardize the colors of cylinder shoulders. Colors of cylinders for Medical gases are covered by an International Organization for Standardization (ISO) standard, ISO 32; but not all countries use this standard. Within Europe gas cylinders colors are being standardized according to EN 1089-3, the standard colors applying to the cylinder shoulder only; i.e., the top of the cylinder close to the pillar valve. In the United States, color-coding is not regulated by law. The user should not rely on the color of a cylinder to indicate what it contains. The label or decal should always be checked for product identification.

How to define valve connections of Gas Cylinders?

Gas cylinders have a stop angle valve at the end on top. During storage, transportation, and handling when the gas is not in use, a cap on the Neck ring may be screwed over the protruding valve to protect it from damage or breaking off in case the cylinders were to fall over. The valves on industrial, medical and diving cylinders are usually of different sizes and types, as are the valves for different categories of gases, making it more difficult to mistakenly misuse a gas.

In the United States, valve connections are sometimes referred to as “CGA connections”, since the Compressed Gas Association (CGA) publishes guidelines on what connections to use for what products. In the EU,DIN connections are more common than in the United States. Medical gases may use the pin-index system to prevent incorrect connection of gases to services.

In the UK, the British Standards Institution sets the standards. Included among the standards is the use left-hand threaded valves for flammable gas cylinders (most commonly brass, BS4, valves for non-corrosive cylinder contents or stainless steel, BS15, valves for corrosive contents). Nonflammable gas cylinders are fitted with right-hand threaded valves (most commonly brass, BS3, valves for non-corrosive components or stainless steel, BS14, valves for corrosive components).

How to recognize EKC Cylinders

Standards and Regulations of all countries require the name of the manufacturer, or its code, or its symbol, to be stamped on to the shoulder of the cylinder. Cylinders produced by EKC group companies are stamped “EKC”

CNG Cylinder

What are the raw materials used in the manufacturing of CNG cylinders?

Commonly used Raw Materials are: Manganese Steel & Chrome Moly Steel

What different types of CNG Cylinders can you supply?

We can supply Onboard Vehicle, CNG ground storage and CNG Transportation Cylinders

What is the Manufacturing process of your cylinders?

Our Convex Bottom Type 1 CNG Cylinders are manufactured from Seamless Steel Tubes through Hot Spinning Process. We also produce light weight CNG on board vehicle Cylinders from Plate.

What different sizes and water capacity CNG cylinders you can supply?

We supply smallest onboard CNG Cylinder in 3 L W.C. for Scooter / Motorcycle and go up to 250 L W.C. or higher for Trucks and Buses. In case of CNG Storage and Gas Transportation applications, we can supply up to 250 L W.C., Working pressure 250 & 300 Bar. We can also supply Jumbo Steel Tubes up to 3000 L water capacity, 250 Bar W.P. or more through our plants in India and U.S.A.

What range of CNG Onboard EKC Manufactures ?

5 Ltrs. to 198 Ltrs.

What are the manufacturing standards of your Onboard CNG Cylinders?

We manufacture Type 1, 200 Bar W.P., CNG Onboard Vehicle Cylinders as per ISO 11439, NZS 5454, ECE R 110 & IS 15490.

What are the manufacturing standards of your Storage Type 1 CNG Cylinders?

We manufacture Type-1 CNG Storage cylinders as per ISO 9809-1, ISO 9809-2 (Both PED & TPED) in W.P. 200 Bar, 250 bar and above. We can also supply cylinders as per ISO-11120

Can you supply the onboard CNG cylinders for US & Canada?

Yes, we can supply the Type 1 CNG Cylinders as per ANSI NGV2 approved in US and Canada.

Do you supply the onboard CNG Cylinders with valve?

Yes, we can supply the CNG cylinders with Valves of approved PRD & TPRD. All CNG cylinders are required to be used only with Bonfire Prototype Tested approved PRD & TPRD Valves.

What kind of external Finish you provide your cylinders with?

All our cylinders are coated with epoxy primer and polyurethane top coat or Powder coated. We provide cylinder color as per customer’s requirement.

What is the recommended life of your cylinders?

All CNG Cylinders produced as per ISO 11439 and ECE R 110 are allowed for maximum usage of 20 years from date of manufacturing and this is stamped on each cylinder. The CNG cylinders go through inspection & requalification process every 3 / 5 year or as defined by the regulatory authority in the country of use.

How many safe filling cycles are recommended?

About 750 cycles per year during the service life.

How do we define the CNG cylinder temperature?

The temperature range for the cylinder’s material is -40°C to 82°C. Temperatures over +57°C must be applied during a short period of time, or must be localized to ensure that the gas’ temperature inside the cylinder never exceeds +57°C

How do we install and handle the CNG cylinder?

The cylinder must be installed in the vehicle using the following guidelines.

If the cylinder is to be removed, transported, or stored, the defined handling procedures are necessary to prevent injuries from the personal or damage to the cylinder itself. The cylinders must be transported carefully, to ensure that no damage occurs to the superficial protective painting. The cylinders can only be handled when depressurized. Safety shoes must we worn to protect the feet when transporting cylinders.

The cylinders will be handled with hands free from sand, grease, oil, or any other substance that may contribute to slippery, burning, or contamination to the surface of the cylinder or its neck-thread. The cylinders should not be handled, transported or grabbed by their valves or pressure relief devices. They must not be struck.

The cylinders must be stored in the following way:

The cylinders must be locked to prevent them from rolling or moving during the storage. When the neck-threads of the cylinders do not contain connectors or valves, plastic protective stoppers must be placed to prevent dust from going inside the cylinder. The stored cylinders must be protected from corrosive environments. Rubber stripes must be placed in between the cylinders, during their storage, so as not to cause corrosion on the surface of the cylinders. Specific elevation tools or devices will be used when required. Stowage must be done in a dry place, under shed, to protect the cylinders from the effects of the sun, rain, etc.

How is mounting of CNG Cylinders done?

The installer of CNG cylinders on the vehicle must follow the regulations regarding the mounting supports for cng cylinders. The following guidelines must be borne in mind .

Two mounting supports, with protective rubber straps, must be used. The rubber straps must not bet wet nor absorbed water. Ensure that the support and the bed-spring are perpendicular regarding the cylinder. If they have not been placed correctly, the support will move when the bed-spring is adjusted. The bed-springs must be tightening with a torque of 40 ft-lbs / 5.54 Kg-m. Ensure to tighten both supports equally.

How is Valve Installation on CNG Cylinder done?

The valves are required to seal one end of the cylinder, while they allow highly pressurized gas to come in and out. A thermal & pressure relief device (TPRD & PRD) are built in the valve for safety purpose.

  • Hold the cylinder with the proper help to adjust the valve.
  • Check that the neck thread is clean and well formed.
  • Wrap around the valve’s thread Teflon, 16 times; apply a thin layer of thread sealer (for threads with high torque effort use Loctite 680).
  • Screw manually the valve in the cylinder and adjust it with the torque key at 18 to 20 Kgm using Torque wrench and valve adaptor for the valve used.
  • The valves must have a TPED & PRD system and the valve used must be approved for Bonfire certification for the particular cylinder being used.
  • An excessive torque may cause damages over the excess flow system inside the valve.
  • Check for leaks once it is installed.
  • What are general inspection guidelines for CNG Cylinders in use?

    Though not mandatory, we recommend that the inspection is performed every 12 months to ensure that CNG fuel storage system is always in good conditions

    Conditions that require an immediate visual inspection:

  • The cylinder or vehicle in which it is installed is involved in a fire.
  • The cylinder is exposed to excessive heat.
  • The cylinder falls or is struck.
  • The vehicle is involved in a collision.
  • The cylinder is suspected to have any damage.
  • Abnormal behavior is seen such as:
  • Smell of gas is noticed (possible gas leak).
  • Unexpected depressurization of the cylinder
  • Loosening
  • Unusual sounds.
  • The installation of the cylinder suffers significative changes.
  • The cylinder is transferred to another vehicle.
  • The cylinder has been over-pressurized according to the design limits.
  • What is process of the destruction of cylinder?

    If a cylinder is not in proper conditions to be used, it must be destroyed and must be marked immediately for its disposal and removal from service.
    Steps to follow to destroy a cylinder:

  • Depressurization of the cylinder (an electric land connection must be used to avoid sparks due to static electricity). The depressurization must be done in an open place, far from sparks’ sources, as motor engines or switches.
  • Once the cylinder is totally empty, Fill it with inert gas, such as nitrogen (N2) at low pressures, to remove the residual cng.
  • Make sure that the cylinder is not pressurized before removing the valve.
  • Remove valves and accessories.
  • Cut the cylinder approximately around the middle of its cylindrical body, covering at least 50% of its circumference to avoid the cylinder from being filled.
  • Dispose the cylinder.
  • How to prepare and perform General Inspection on CNG Cylinders installed?


  • If the cylinders are mounted underneath vehicle, place vehicle on lift.
  • If the cylinders are roof mounted, open roof mounted shields.
  • If the cylinders are mounted in the truck bed and are shielded, remove shields.
  • Clean cylinders with soap and rag.
  • Take a note about the cylinders details like serial number, date of manufacture, etc.

  • Verify that the service life has not expired. If expired, condemn cylinder
  • Verify the cylinder mounting system and ensure that all the supports are in good conditions and are properly safe in the vehicle that no screws are missing.
  • Ensure that the protection straps are in good conditions and that the cylinders are tightly held.
  • Verify that the rubber gaskets are in place and in good condition.
  • Check the brackets for signs of damage.
  • Verify that PRD is attached to cylinder. IF no PRD present, contact cylinder manufacturer.
  • Examine the valve and PRD assembly for damage.
  • Inspect the PRD for signs of bulging of the thermally active material.
  • Cylinder
    Perform detailed Visual Inspection starting at fill end and progressing to opposite end. Use a flashlight, and mirror.
    If cuts, scratches, abrasion, Impact, are visible, Use regulatory guidelines to note the damage level.
    Verify if rusting or pitting for surface corrosion is visualized.
    According to the level of damage the cylinder:
    Is approved for continued use.
    Should be handled according to the cylinder manufacturer guideline.
    Must be condemned and destroyed.
    Do not use welding equipment near the cylinder.
    Do not strike the cylinder with tools or other objects.

    Multi Element Gas Container (MEGC)

    What is the usage of MEGC?

    MEGC is used for the bulk storage and transportation of compressed gases.

    What is the manufacturing standard of MEGC?

    In EKC, MEGC are manufacturing as per the ISO 668, ISO 1469 , ISO EN 13807 etc.

    Which ISO Containers sizes are available with EKC?

    EKC have CSC certification for 20 ft. and 40 ft. for both standard and High cube sizes. We can make any size as per customer requirement.

    What are the pressure rating of the MEGC?

    EKC MEGC available in 200 bar, 250 bar, 300 bar and 350 Bar. If customer need higher pressure rating then we can design our MEGC accordingly.

    Is EKC manufactures only CNG MEGC?

    No, we are manufacturing the MEGC for the different gases like permanent & liquefied and Hydrogen & Embrittling gases.

    What is the maximum water volume of EKC MEGC?

    Our 20 Ft. MEGC have capability to stored 19,680 liters at different pressures

    Is EKC manufacture MEGC for the buffer application?

    Yes, EKC is manufacturing MEGC for the Buffer applications.

    Which standard of cylinder is being used for the Buffer application?

    EKC using and recommended ISO 9809-1 or that cylinder which have tensile strength less than 1100 Mpa for the Buffer application for the safety and long life of the System.

    What is the total weight limit of the EKC MEGC?

    EKC MEGC`s have weight limits as per the ISO Standards, so you can transport the gas hassle free.

    Is EKC MEGC CSC Approved?

    Yes we have CSC Approval on 20 ft. & 40 ft. MEGC for Both Standard and High Cube Sizes.

    Is EKC MEGC Approved by ADR?

    Yes, EKC MEGC`s have the approval of ADR on both Sizes 20 ft. and 40 ft.

    Does EKC MEGC have Drain Manifold?

    Yes, EKC MEGC have Double Neck Cylinders, on one neck pressure manifold assembled with valves having independent PRD and TPRD along with fittings and on the other side Drain manifold arranged for draining out the sludge and other unwanted remains like oil, contaminated water etc from the elements /cylinders.