Scope of application1 | Inspection group classification according to the contained substance (Group 1/Group 2 fluid), aggregate condition (liquid/gaseous), product of pressure and capacity (PS×V in bar×liter), operating temperature, and type of pressure vessel Examples of pressure vessels with obligation of Recurring Inspection: Group 1 fluid: PS×V > 1000 Group 2 fluid: Gases where TS £ 120°C and PS×V > 3000; Gases where TS > 120°C and PS×V > 1000 Autoclaves: PS×V > 200 | Pressure vessels for generating hot water and steam Inspection group classification according to apparatus type, operating gauge pressure, operating temperature, product of pressure and capacity, firing type, and heat output Examples of pressure vessels with obligation of Recurring Inspection: Steam boilers PS > 10 bar or PS×V > 500 bar×liter (2) Water boilers Gas/liquid-fired and TS £ 120°C: Q > 10 MW (3) Gas/liquid-fired and TS > 120°C: Q > 1 MW (3) Solid fuel: Q > 1 MW Tube-bundle water heaters Internal diameter of tubes > 38 mm or PS > 16 bar or PS×V > 750 bar×liter (2) | Inspection group classification according to the fluid conveyed (Group 1 fluid, Group 2 fluid), the inspection group of the connected pressure vessels, and dimensioning criteria (e.g. design for creep or fatigue stress) | 1 TUKES (see “Official supervision”) maintains and updates a list of pressure systems subject to recurring inspection 2 V = minimum water volume contained in the systemund Schutzeinrichtungen) die „relevante Fluide“ (Dampf ohne Druckeinschränkung, Gase und verflüssigte Gase > 0,5 bar) 3 Q = firing heat output |
Documentation1 | § Certificate of conformity § Operating instructions § Workshop drawings § Design data (e.g. operating data, corrosion factors) § Material certificates § Welding information and information incl. certificates relating to NDT and heat treatment | 1 The documents listed only involve the design and manufacturing documentation required for pressure vessels with Recurring Inspections. No details are given in the source text with regard to any inspection documents. |