Steam Generator Technical Specification

STEAM GENERATOR AND ASSOCIATED EQUIPMENT TECHNICAL SPECIFICATION

1. The steam generator must be suitable for liquid and gas firing, have a reduced water volume, be of fire/flue-tube, fully cylindrical construction, designed and manufactured in compliance with TSE and EN standards, and TSE certified. A CE certificate alone is not sufficient.
2. Pressure parts must be manufactured from P265GH or P355GH boiler plate compliant with EN 10028. Non-pressure parts such as doors and smoke boxes may be made from S235JR boiler plate.
3. Flue tubes must be manufactured from normalized welded boiler tube compliant with EN 10217-2 up to 6 bar operating pressure, and from seamless drawn boiler tube to EN 10216-2 for pressures of 6 bar and above.
4. The manufacturer must provide material certificates.
5. Steam generator design pressure must be 1.05 times the operating pressure; strength calculations must be based on this value.
6. The steam generator must be tested at 1.5 times operating pressure for one hour.
7. The steam generator must reach operating conditions and produce steam in a short time.
8. There must be a droplet-separator at the steam outlet.
9. Generator welds must be carried out by certified welders; the manufacturer must provide these certificates.
10. The steam generator body must be insulated with 100 mm rock wool.
11. Flanges used on the steam generator must be at least PN16 class.
12. It must have an explosion door opening directly into the combustion chamber (flame tube, furnace).
13. It must have at least one flame-viewing device made of fire-resistant ceramic glass.
14. The steam generator must have two safety valves.
15. The bottom blowdown valve must be DN40 PN16.
16. All blowdown lines must connect to a single main line.
17. Water level must be controlled with a level regulator and level electrodes.
18. The level gauge must be of the glass type.
19. The feedwater pump must be stainless and of the multi-stage type.
20. Feedwater pump discharge pressure must exceed the steam generator's operating pressure.
21. The feedwater pump must be able to comfortably pump water at 102°C.
22. There must be two stainless check valves on the feedwater discharge line.
23. Condensate tank volume must equal the steam generator's one-hour water requirement (example: a 1 t/h steam generator requires a 1,000-liter condensate tank).
24. A steam boiler should be used above 3 t/h steam capacity.
25. A tandem-type water softener must be used, sized to the water hardness.
26. All electrical devices on the steam generator (burner, pumps, etc.) must be controlled from the boiler control panel.
27. Steam and flue gas temperatures must be readable from the panel and adjustable to the desired setting.
28. When steam or flue gas temperature exceeds the set value, a light and sound alarm system must activate, and this safety feature must stop the burner.
29. There must be a light and sound alarm system on the panel for water level.
30. The burner's fault indicator light must be visible on the control panel.
31. The manufacturer is obliged to provide the operator with TSE and other quality certificates, along with the installation and layout diagram and operating instructions.