National foreword

This British Standard is the UK implementation of EN 12952‑1:2001. Together with BS EN 12952‑2:2001, BS EN 12952‑3:2001, BS EN 12952‑5:2001, BS EN 12952‑6:2002, BS EN 12952‑7:2002, BS EN 12952‑10:2002 and BS EN 12952‑11:2007, it supersedes BS 1113:1999 which remains current and obsolescent.

The obsolescent status means that the standard will no longer be updated. This status is given to BS 1113:1999 on the basis that there are numerous boilers throughout the world with long expectations of life that will require use of this standard for service and repair, enabling justification of continued service of the boilers.

The UK participation in its preparation was entrusted to Technical Committee PVE/2, Water-tube and shell boilers.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 29 April 2002

This European Standard was approved by CEN on 10 March 2000.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

Foreword

This document EN 12952‑1:2001 has been prepared by Technical Committee CEN/TC 269 "Shell and water-tube boilers", the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest by June 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of the Pressure Equipment Directive (PED)1).

For the relationship with Pressure Equipment Directive see informative annex ZA, which is an integral Part of this document.

According to the CEN/CENELEC Internal Regulations, the national satndards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

The European Standard series EN 12952 concerning water-tube boilers and auxilliary installations consists of the following parts:

Part 1: General

Part 2: Materials for pressure parts of boilers and accessories

Part 3: Design and calculation for pressure parts

Part 4: In-service boiler life expectancy calculations

Part 5: Workmanship and construction of pressure parts of the boiler

Part 6: Inspecting during construction, documentation and marking of pressure parts of the boiler

Part 7: Requirements for equipment for the boiler

Part 8: Requirements for firing systems for liquid and gaseous fuels for the boiler

Part 9: Requirements for firing systems for pulverized solid fuels for the boiler

Part 10: Requirements for safeguards against excessive pressure

Part 11: Requirements for limiting devices, and safety circuits of the boiler and accessories

Part 12: Requirements for boiler feedwater and boiler water quality

Part 13: Requirements for flue gas cleaning systems

Part 14: Requirements for flue gas DENOX-systems

Part 15: Acceptance tests

Part 16: Requirements for grate and fluidized bed firing systems for solid fuels for the boiler

Although these Parts may be obtained separately, it should be recognised that the Parts are inter-dependent. As such, the design and manufacture of boilers requires the application of more than one Part in order for the requirements of the European Standard to be satisfactorily fulfilled.

NOTE Part 4 is not applicable during the design, construction and installation stages.

The annexes A and ZA of this European Standard are informative.

1 Scope

1.1 General

This European Standard 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 European 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 still prevail when the water-tube boiler is put into service. This protection will be achieved by the proper application of the design, manufacturing, testing and inspection methods and techniques incorporated in the various parts of this European Standard. Where appropriate, adequate warning of residual hazards and the potential for misuse are given in the training and operating instructions and local to the equipment concerned (see prEN 12952‑8, prEN 12952‑9 and prEN 12952‑16).

1.2 Boiler assembly

For the purpose of this standard, the boiler assembly includes:

the water-tube boiler including all the pressure parts from the feedwater 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 circumfer-ential 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.

1.3 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.

For a description of the types of operating systems used for water-tube boiler plant, see prEN 12952‑7.

1.4 Exclusions

This European Standard 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.

2 Normative references

3 Terms and definitions

4 Symbols and abbrevations

5 Responsibilities

5.1 Purchaser

5.2 Manufacturer

5.3 Responsible authority

6 Interpretations

7 Design/type appraisal of pressure parts

Bibliography

BS EN 12952-1:2001

Water-tube boilers and auxiliary installations - General

Published:

29 Apr 2002

Withdrawn:

30 Nov 2015