Air Receivers considered as statuary equipment

Not sure what you mean by statuary equipment...Inspection intervals and frequency are determined by the authority having jurisdiction...

https://www.nationalboard.org/index.aspx?pageID=134&ID=284

..."It is recommended that you test pressure relief valves at least once every six months, especially to reduce leakage caused by the buildup of minerals and corrosion."..

https://www.mpofcinci.com/blog/testing-pressure-relief-valves/#:~:text=It%20is%20recommended%20that%20you,buildup%20of%20minerals%20and%20corrosion.

Statuary Equipment means with Statutory Inspection; which is defined as an Inspection as per Statute or an Inspection as required by current local Legislation and Regulation.

<Sigh>

So, what <...Statute or...Legislation and Regulation...> prevails in the area where the equipment is located?

Do help the forum provide whatever help is sought.

Any equipment that could cause injury or death must be inspected regularly, that is standard throughout industry...

Statutory...

Even at lower pressures it would be prudent to do proper maintenance and replace lower pressure vessels at recommended intervals...

https://allaboutaircompressors.com/do-air-compressor-tanks-expire/#:~:text=Your%20average%20compressor%20for%20home,the%20proper%20storage%20and%20care.

The link posted (all about air compressors) contains vague and dangerous information.

It states that you should "replace the tank when it has expired" ... what does this mean ?

It also states that you should never repair weld onto the tank shell unless you are "supremely confident in your welding abilities. " This is dangerous advice !!!

Unless you a licensed, Code approved welding shop, you should NEVER perform any kind of a weld on a pressure vessel !!

Compressed air systems are covered by a catalogue of regulation in the UK.

The Pressure Equipment (Safety) Regulations 2016 (legislation.gov.uk)

The legislation requires a written scheme of examination to be maintained. Examination will normally be carried out by a third party in pursuit of sustaining burst/collapse indemnity insurance cover on the equipment.

As per this statement "As a general rule, air receivers with a diameter in excess of 12 inches operating at 150 psi will need to comply with the legislation."

Not all air receivers are considered as statuary equipment, our Air receiver is operating at 110 psig. with Diameter of 530 cm.

is the above statement correct?

Well, that would depend upon the jurisdiction operating in the area where the <...air receiver...> is located, which cannot be seen from here. Wherever the <...general rule...> applies, such a statement would be superseded by the above-mentioned legislation were the installation in the UK.

Advice can be sought over the telephone from the Engineer/Surveyor responsible for assessing the equipment for burst/collapse indemnity insurance cover. That individual's name and signature will be on the periodic inspection reports on the equipment, the location of which cannot be seen from here.

appreciate your reply and response.

Wow that's a big air tank....a failure would be like a bomb.....What may I ask is so much air used for?

Aha: that's the supply, which keeps a substantial proportion of CR4 participants going; it just needs to be heated a bit. :-)

Air receivers are unlikely to be required statutory equipment, however if you have one, unless it is rated for less than 1 bar gauge pressure, it most certainly needs regular inspection, such inspection is likely statutory in the unknown location you are inquiring about.