All pressure equipment corrodes as they are used. Cracks and openings that are difficult or even impossible to see may occur in the joints and welding places. The risk of explosion occurs as a result of the use of these pressurized equipment, especially used in industry, with these cracks and openings. The main reasons for the explosions of pressure vessels may be the periodic controls not being done on time and in accordance with the standards, the choice of low cost products that do not comply with the standards during the production phase, and the use by operators who did not receive the necessary training.

Hydrostatic testing is essential as a basic principle in pressure vessels. These tests are done with 1.5 times the operating pressure and for periods not exceeding one year, unless otherwise specified in the standards. However, the non-destructive testing methods specified in the standards can also be used instead of hydrostatic testing in pressure vessels that are not capable of hydrostatic testing due to the nature of the work equipment and the mandatory conditions arising from the business. This issue is stated together with its justification in the periodic control reports to be prepared by RM Mechatronic in accordance with the Regulation on Health and Safety Conditions in the Use of Work Equipment

Periodic controls of pressure vessels and installations are carried out in accordance with the Regulation on Health and Safety Conditions in the Use of Work Equipment, as well as the following regulations

• Pressure Equipment Directive- (2014/68 / EU)

This Directive shall apply to the design, manufacture and conformity assessment of pressure equipment and assemblies with a maximum allowable pressure PS greater than 0,5 bar

• Pressure Equipment Directive- (2014/68 / EU)

This Directive shall apply to simple pressure vessels (‘vessels’) manufactured in series with the following characteristics:
(a) the vessels are welded, intended to be subjected to an internal gauge pressure greater than 0,5 bar and to contain air or nitrogen, and are not intended to be fired;

(b) the parts and assemblies contributing to the strength of the vessel under pressure are made either of non-alloy quality steel or of non-alloy aluminium or non-age hardening aluminium alloys;

(c) the vessel is made of either of the following elements:
(i) a cylindrical part of circular cross-section closed by outwardly dished and/or flat ends which revolve around the same axis as the cylindrical part;

(ii) two dished ends revolving around the same axis;

(d) the maximum working pressure of the vessel does not exceed 30 bar and the product of that pressure and the capacity of the vessel (PS × V) does not exceed 10 000 bar.L;

(e) the minimum working temperature is no lower than – 50 °C and the maximum working temperature is not higher than 300 °C for steel and 100 °C for aluminium or aluminium alloy vessels.

If non-destructive testing methods are used in periodic controls, these methods can only be applied by authorized RM Mechatronics expert staff trained in accordance with TS EN ISO 9712 standard

Periodic control times and control criteria of pressure vessels and installations are taken from the Regulation on Health and Safety Conditions in the Use of Work Equipment;

Equipment Name Examination Period
(Max Time)
(Standards examination periods are taken into account)*		 Periodic Inspection Criteria


(Standards are specified in below)**
Steam boiler 1 year if the period is not specified in the standards TS 2025, TS EN 12952-6 ve TS 377-5 EN 12953-5, it is made in accordance with the criteria specified in related standards.
Heater Boilers 1 year if the period is not specified in the standards TS EN 13445-5, TS EN 303-1, TS EN 303-3 ve TS EN 303-5, it is made in accordance with the criteria specified in related standards.
Portable gas cylinders
(Stitched, seamless)		 3 years if the period is not specified in the standards TS EN 1802, TS EN 1803, TS EN 1968, TS EN 14876 ve TS EN ISO 16148, it is made in accordance with the criteria specified in related standards
Portable Acetylene Tubes It is made in accordance with the criteria TS EN ISO 10462 TS EN ISO 10462, it is made in accordance with the criteria specified in related standards.
Manifold acetylated tube bundles 1 year if the period is not specified in the standards TS EN ISO 13088, TS EN 13720 ve TS EN 15888, it is made in accordance with the criteria specified in related standards.
Manifold tube bundles 1 year if the period is not specified in the standards TS EN 13385, TS EN ISO 10961 ve TS EN 15888, it is made in accordance with the criteria specified in related standards.
Liquefied gas tanks (LPG, etc.) (above ground) (1) 10 Years TS 1446, TS EN 12817 ve TS EN 12819, it is made in accordance with the criteria specified in related standards.
Liquefied gas tanks (LPG, etc.) (under ground)(1) 10 Years TS  EN 12817, TS EN 12819 , it is made in accordance with the criteria specified in related standards.
Used LPG cylinders 1 year if the period is not specified in the standards TS EN 1440, it is made in accordance with the criteria specified in related standards.
Compressed Air Tanks (2), (3) 1 year if the period is not specified in the standards TS 1203 EN 286-1, TS EN 1012-1, TS EN 13445-5, it is made in accordance with the criteria specified in related standards.
Cryogenic tanks It is made in accordance with the criteria TS EN ISO 21009-2 TS EN ISO 21029-2, TS EN ISO 21009-2, TS EN 13530-3 ve TS EN 14197-3, it is made in accordance with the criteria specified in related standards.
Dangerous liquids (4), (5) tank and warehouses 10 Years API 620,  API 650, API 653, API 2610, it is made in accordance with the criteria specified in related standards.
(1) The safety valves in LPG tanks are tested and tested annually in 5.
(2) Portable or stationary compressor air tanks and all types of vessels containing compressed air and their fixed equipment.
(3) The hydrostatic pressure test at each stage of compressors compressing stepwise is done with the 1,5 solid of the compressed air tanks and their fixed equipment at the highest permissible pressure in that stage.
(4) Hazardous liquids: corrosive or hazardous to health.
(5)Non-destructive testing methods are used.
(*)Periodic control times are based on API 510 standard pressure equipment; The periodic inspection times determined by the risk assessment and management taking into account the loss of content (pressure and the like) on the pressurized equipment and the deterioration due to corrosion must not exceed half of the remaining life of the equipment and in any case do not exceed five years.
(**) For the periodic control criterion, reference is made to the standards set out in the table as areference, and the relevant standards which are not mentioned here or published after the date of publication of the Regulation should also be taken into account.