A number of key parts of the BS EN 12952 series have now been updated.
You may purchase all parts of BS EN 12952 separately but they are inter-dependent. The design and manufacture of water-tube boilers will require the use of more than one part in order for the requirements of the standard to be fulfilled.
BS EN 12952-1:2001 Water-tube boilers and auxiliary installations. General
BS EN 12952-1 applies to water-tube boilers with volumes in excess of 2 litres for the generation of steam and/or hot water at an allowable pressure greater than 0,5 bar and with a temperature in excess of 110 °C as well as auxiliary installations (other plant equipment).
The purpose of this standard is to ensure that the hazards associated with the operation of water-tube boilers are reduced to a minimum and that adequate protection is provided to contain the hazards that can still occur when the boiler is put into service. This protection will be achieved through the correct application of the design, manufacturing, testing and inspection methods and techniques incorporated in the various parts of this standard series.
Newly updated parts for 2012:
- BS EN 12952-2:2011 Water-tube boilers and auxiliary installations. Materials for pressure parts of boilers and accessories.
- BS EN 12952-3:2011 Water-tube boilers and auxiliary installations. Design and calculation for pressure parts of the boiler.
This part of the standard has now been significantly updated so as to incorporate changes agreed by the CEN/TC 269 Maintenance Help Desk (MHD) as a result of answering submitted questions, changes identified by the drafting group responsible for the development of the standard as well as any corrections to the text/formulae that have been identified.
EN 12952-3 deals primarily with the design of water tube boilers and is a significant part to the standard
- BS EN 12952-4:2011 Water-tube boilers and auxiliary installations. In-service boiler life expectancy calculations
- BS EN 12952-5:2011 Water-tube boilers and auxiliary installations. Workmanship and construction of pressure parts of the boiler
- BS EN 12952-6:2011 Water-tube boilers and auxiliary installations. Inspection during construction; documentation and marking of pressure parts of the boiler.
For the purpose of this standard, the boiler assembly includes:
- The water-tube boiler including all the pressure parts from the feed water inlet (including the inlet valve) up to and including the steam and/or hot water outlet (including the outlet valve or, if there is no valve, the first circumferential weld or flange downsteam of the outlet header). All superheaters, reheaters, economizers, the associated safety accessories and interconnecting tubing that are heated by means of the gases of combustion and are not capable of isolation from the main system by interposing shut-off valves. Additionally, the tubing that is connected to the boiler involved in services such as draining, venting, desuper-heating, etc., up to and including the first isolating valve in the tubing line downstream of the boiler. Reheaters which are heated by the flue gas or independently fired, and are separately provided with their safety accessories including all control and safety systems.
- isolatable superheaters, reheaters, economizers and related interconnecting tubing
- the heat supply or firing system
- the means of preparing and feeding the fuel to the boiler including the control systems
- the means of providing the boiler with feedwater including the control system
- the pressure expansion vessels and tanks of hot water generating plant.
Other plant equipment:
- the boiler supporting structural steelwork, the thermal insulation and/or brickwork and the casing
- the means of providing the boiler with air including the forced draught fans and air pre-heaters which are heated by the gases of combustion
- the facilities for moving flue gases through the boiler up to the stack inlet, including the induced draught fans and the air pollution reducing equipment located in the flue gas removal path
- all other equipment necessary for the operation of the boiler plant.
It does NOT apply to the following types of boiler plant:
- boilers other than stationary boilers
- shell type boilers including electrical boilers
- nuclear primary circuits, the failure of which can cause an emission of radioactivity.