Dating scuba tanks
The cleanliness and physical condition of dive cylinders can directly effect the safety of divers. The recent rapid increase dive tourism activities in esatern Indonesia has caused a sharp increase in the need for supporting services. Recognising this need, PT EON Engineering has recently opened a hydro test station to international standard at our workshop in Sorong. EON prioritises safety and high quality of service in all aspects of the work carried out.
Finding your VISUAL and HYDRO Test Dates
Cylinder Testing. This applies to both steel and aluminium cylinders. All cylinders must display a valid test sticker and the paperwork for the cylinder should be retained in case of inspection. Tests may only be undertaken by premises licensed with Industria. Read more about the law in Spain for tank testing here article 13 refers to the inspection dates. The fine for out of date cylinders can be high and cylinders may also be confiscated if the cylinder tests are not in date. This includes new cylinders - make sure you have the paperwork, a stamp on the neck is not enough and the test date will be the date on the neck of the cylinder, not the date you bought it.
Our stamp pictured on the right is registered with the Spanish Government - you can find a list of registered inspection centres here. Remember, if you choose to use a company which is not legally registered with Industria, then your inspections will not be valid. Visual Inspection. The procedure to visually inspect a tank is as follows: Removal of the tank boot, nets and valve.
The exterior of the tank is then inspected for impact damage and corrosion. The interior of the cylinder is examined using a special endoscope. Dental mirrors may enable the inspector to examine the area around the inside of the tank neck. The valve is checked for smooth operation and its threads lubricated to help prevent galvanic action between the dissimilar metals of the tank and valve.
Valves may also require periodic overhauls, just like scuba regulators. If no corrosion or damage is detected, the cylinder is reassembled. A sticker is then placed on the tank which identifies the month and year in which the inspection was done and the expiry date. If damage or corrosion is detected, the technician will decide upon an appropriate course of action. Extensive oxidation or deep pitting is treated by degrees of shot blasting. Essentially this test is a detailed visual inspection, both internal and external with the following failure criteria: If in the opinion of the inspector, any of the above criteria are borderline, then hydrostatic testing may also be required.
In this test the cylinder is filled with water and then placed inside a water-filled, high-pressure chamber. The water pressure inside the cylinder is then increased to five thirds of it's maximum working pressure. This is sufficient to cause the cylinder to expand slightly. This expansion causes the water outside the tank to be displaced and this is channeled into marked collection tubes that allow it to be measured. If not, the tank may not be refilled. After pressure testing, tanks that pass are cleaned and dried, then stamped with the current month and year and the test centre's registered stamp.
Most tank valves are Balanced type which means that high pressure air is acting on both sides of the valve assembly to prevent any stiffness while turning the valve. Some have a pressure relief valve fitted called a burst disc. The cylinder valve is fitted into the neck of the cylinder and is provided with an 'o' ring seal so that the diving regulator can be connected to it.
The valve is screwed into the cylinder neck with either a taper thread seal or a parallel thread seal and o ring. It is not recommended that divers attempt to service their own cylinder valves, unless they possess specialist skills. Provided that the cylinder valve is washed in fresh water after use and is kept clean, there should be no need for it to be serviced between the intervals of cylinder test.
Our shot-blasting machine cleans all the internal surfaces of the diving cylinder. It removes rust, general contamination and corrosion build-up. It does not however, remove base material, and for particularly rusty tanks, two or three cycles may be required. The tanks are cleaned by introducing steel grit under pressure. It is boosted by a higher additional air pressure via a mixing valve and a venturi action ensures optimum results. Advantages over rumbling or tumbling: Rumbling rolls the pit edge over, obscuring the defect.
Shot blasting cleans deep into the pit, precisely showing the defect. As well as testing, we are able to offer an O2 cleaning service. Current recommendations for the O2 cleaning of scuba cylinders is that they are cleaned every year. Once a cylinder has been O2 cleaned, it receives a individual sticker to indicate that it has been cleaned to current standards and the date of expiry is punched into this sticker. O2 cylinder valves are serviced at the same time as the cylinder test. Ours costs include this unless any non standard parts are required.
If any non standard service parts are required these will be charged separately. Powered by Create your own unique website with customizable templates. Get Started. Visual Inspection The procedure to visually inspect a tank is as follows: Hydrostatic Testing In this test the cylinder is filled with water and then placed inside a water-filled, high-pressure chamber.
Valve Servicing Most tank valves are Balanced type which means that high pressure air is acting on both sides of the valve assembly to prevent any stiffness while turning the valve. Shot Blast Cleaning Our shot-blasting machine cleans all the internal surfaces of the diving cylinder. O2 Cleaning As well as testing, we are able to offer an O2 cleaning service.
My dive instructor told me that in the U.S. they won't hydro a tank older than , isn't the accepted cutoff date for a T6 alloy tank. Checking scuba tanks for hydro dates is critical in the scuba diving industry. “ SCUBA” stands for “Self-Contained Underwater Breathing.
Cylinders are made either of steel or aluminum, with each having its own advantages and disadvantages. Once a diver has breathed the air out of the tank, he stays the same weight in the water, which helps with buoyancy. Steel is prone to rusting, however, which is problematic for any piece of dive equipment, but especially for a cylinder, as you want your tank to be clean, dry and rust free to stop any potential air contamination or valve blockages. Aluminum cylinders are lighter than steel and are also a lot less expensive. They are the most commonly used tanks at dive resorts.
Scuba Cylinders are high pressure vessels and as such should be handled carefully.
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Tips and Uses for Old or Decommissioned Scuba Tanks
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Testing and inspection of diving cylinders
Due to the importance of the Scuba cylinder we thought its important to give them their own section, the information on these pages are extra to the dive equipment theory requirements but this information compliments and enhances the knowledge already given about scuba tanks or cylinders. Congratulations, now what? Dive Theory — Scuba Tanks and Cylinders Due to the importance of the Scuba cylinder we thought its important to give them their own section, the information on these pages are extra to the dive equipment theory requirements but this information compliments and enhances the knowledge already given about scuba tanks or cylinders. Cylinder Safety Cylinders are heavy so utilize proper handling procedures; i. Treat cylinders with respect. A scuba tank or cylinder filled to bar or psi has over a million pounds of kinetic energy. Although rare somewhere in the world one scuba cylinder explodes each year, usually with disastrous results. In case of a fire, a partially-filled cylinder can explode. A full cylinder will burst the safety and drain the cylinder. Transport cylinders in your car lying crosswise.
Transportable pressure vessels for high-pressure gases are routinely inspected and tested as part of the manufacturing process. They are generally marked as evidence of passing the tests, either individually or as part of a batch some tests are destructive , and certified as meeting the standard of manufacture by the authorised testing agency, making them legal for import and sale.
For many Florida divers, it is easy to find excuses to postpone the responsibilities of diving. Just like your regulator, BC and computer, your scuba cylinder requires an annual checkup, too. As a full service center, Force-E can make sure that your gear stays in tip-top condition, and receives the care and attention it requires.
Dive tank permanent expiration?
Even with proper maintenance, scuba tanks eventually wear out. Dents, cracks, and rust can compromise a scuba tank's structural integrity. The dive industry recommends that tanks be visually inspected for damage once a year, and the United States Department of Transportation requires that all compressed gas cylinders undergo hydrostatic testing every 5 years. If a tank fails either visual inspection or hydrostatic testing, it is decommissioned. The owner is left with a heavy, bulky hunk of metal. Now what? If you're uncertain, double check to make sure that the tank can't be used for diving. If the tank's hydrostatic test date is passed, send the tank in for testing. Steel tanks have a very long life and steel tanks from the s can still be found in perfect working condition. Remove the tank's valve. Tank valves are valuable, and a valve in good condition can be re-used or sold.
Testing and inspection of diving cylinders
Cylinder Testing. This applies to both steel and aluminium cylinders. All cylinders must display a valid test sticker and the paperwork for the cylinder should be retained in case of inspection. Tests may only be undertaken by premises licensed with Industria. Read more about the law in Spain for tank testing here article 13 refers to the inspection dates. The fine for out of date cylinders can be high and cylinders may also be confiscated if the cylinder tests are not in date.
Dive Theory – Scuba Tanks and Cylinders
These aluminum or steel vessels retain our breathing gas at incredibly high pressures. Modern regulators then convert that high-pressure gas to intermediate and then ambient pressure, meaning that, whatever your depth, you should receive a smooth flow of breathing gas. When it comes to our dive equipment, we often forget about our scuba cylinder. Yet it is vital. We often take for granted that our cylinders are safe, and that dive staff has tested and properly cared for them.
Dive Theory – Scuba Tanks and Cylinders
Checking scuba tanks for hydro dates is critical in the scuba diving industry. It is important for tanks to be inspected and safe to ensure your safety while diving. Each tank has a series of codes on it and each has inspection and testing stickers. If those are out of date, no responsible, reputable dive shop will refill the tank. Visual inspections are required at least once per year to check for cuts, dents, stress lines, bulges, plating condition, a current hydrostatic test date, and signs of general abuse outside, and pits, corrosion, coating defects, neck cracks, and thread integrity inside. If all is well, the inspectors puts the tank back together and applies a new sticker.
Scuba Cylinders by Conrad H. Air means life, and the container that carries your air therefore means life, which means it has to be absolutely fail-safe. That's why scuba cylinders--which are also referred to as "tanks" or "bottles"--must not only be of high quality, but they are also subject to periodic inspection and testing. Each tank has a series of codes on it and each has inspection and testing stickers. If those are out of date, no responsible, reputable dive shop will refill the tank. As you can see, diving certification agencies take no chances.MGB Has Died Due to Cringe - Day 4 Panzermadels Tank Dating Simulator