Free-standing chimneys - Part 9: Lifetime management - Monitoring, inspection, maintenance, remedial and reporting; Operations and actions required

This document deals with the general requirements and the basic performance inspection, maintenance and reporting criteria for the Lifetime management, Monitoring, Inspection, Maintenance, Cleaning, Repair and Remedial work including the Reporting; Operations and Actions Required of all types of structurally independent chimneys. This document applies to any windshield, single stack, tower, mast and liners covered by the EN 13084 series.
The Lifetime management takes into account the original structural and operating design of the structurally independent chimneys under operational conditions and other actions to verify that mechanical resistance and stability and safety in use are continued at the designed for level as expected and/or adapted to changes in the operational requirements of the structure and/or its environment.
NOTE   In other parts of the EN 13084 series, rules will be given where chimney products in accordance with EN 1443 (and the relating product standards) may be used in structurally independent chimneys.

Freistehende Industrieschornsteine - Teil 9: Lebensdauermanagement - Überwachung, Inspektion, Wartung, Sanierungsmaßnahmen und Dokumentation; Erforderliche Maßnahmen und Verfahren

Dieses Dokument behandelt die allgemeinen Anforderungen und die grundlegenden Kriterien für die Inspektion, Wartung und Berichterstattung über Lebensdauermanagement, Überwachung, Inspektion, Wartung, Reinigung, Reparatur und Sanierung, einschließlich erforderlicher Dokumentation, Maßnahmen und Verfahren für alle Arten von freistehenden Schornsteinen. Dieses Dokument gilt für alle Tragrohre, Einzelschornsteine, Türme, Maste und Innenrohre, die von der Reihe EN 13084 behandelt werden.
Das Lebensdauermanagement berücksichtigt die ursprüngliche bautechnische und betriebliche Auslegung der freistehenden Schornsteine unter Betriebsbedingungen und sonstigen Einwirkungen, um nachzuprüfen, dass die mechanische Tragfähigkeit, die Stabilität und die Nutzungssicherheit fortlaufend auf dem geplanten Niveau gehalten werden und/oder an Änderungen der betrieblichen Anforderungen an das Tragwerk und/oder dessen Umgebung angepasst werden.
ANMERKUNG   In anderen Teilen der Normenreihe EN 13084 werden Regeln für die Verwendung von Schornsteinprodukten in Übereinstimmung mit EN 1443 (und den damit verbundenen Produktnormen) in freistehenden Schornsteinen angegeben.

Cheminées autoportantes - Partie 9 : Gestion du cycle de vie - Surveillance, inspection, maintenance, mesures correctives et établissement de rapports ; opérations et actions requises

Le présent document traite des exigences générales et des critères de performances de base relatifs à l’inspection, la maintenance et l’établissement de rapports pour la gestion du cycle de vie, la surveillance, l’inspection, la maintenance, les travaux de réparation et correctifs incluant l’établissement de rapports ; les opérations et actions requises de tous types de cheminées autoportantes. Le présent document s’applique à tous les brise-vents, cheminées monoconduit, tours, mâts et conduits intérieurs couverts par la série de normes EN 13084.
La gestion du cycle de vie prend en compte la conception structurelle et opérationnelle d’origine des cheminées autoportantes dans des conditions opérationnelles ainsi que d’autres actions pour vérifier que la résistance mécanique, la stabilité et la sécurité en cours d’utilisation correspondent en permanence au niveau de conception prévu et/ou adapté aux variations des exigences opérationnelles de la structure et/ou de son environnement.
NOTE   Dans d’autres parties de la série de normes EN 13084, des règles seront données dans lesquelles des produits de conduits de fumée conformément à l’EN 1443 (et aux normes de produits associées) peuvent être utilisés dans des cheminées autoportantes.

Prostostoječi dimniki - 9. del: Upravljanje življenjske dobe - Nadzorovanje, inšpekcijski pregled, vzdrževanje, sanacijski ukrepi in poročanje - Zahtevani ukrepi in postopki

General Information

Status
Not Published
Current Stage
4599 - Dispatch of FV draft to CMC - Finalization for Vote
Due Date
26-Apr-2022
Completion Date
26-Apr-2022

Buy Standard

Draft
prEN 13084-9:2021
English language
30 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 13084-9:2021
01-junij-2021
Prostostoječi dimniki - 9. del: Upravljanje življenjske dobe - Nadzorovanje,
inšpekcijski pregled, vzdrževanje, sanacijski ukrepi in poročanje - Zahtevani
ukrepi in postopki
Free-standing chimneys - Part 9: Lifetime management - Monitoring, inspection,
maintenance, remedial and reporting - Operations and actions required

Freistehende Industrieschornsteine - Teil 9: Lebensdauermanagement - Überwachung,

Inspektion, Wartung, Sanierungsmaßnahmen und Dokumentation; Erforderliche
Maßnahmen und Verfahren

Cheminées autoportantes - Partie 9 : Gestion du cycle de vie - Surveillance, inspection,

maintenance, mesures correctives et établissement de rapports ; opérations et actions

requises
Ta slovenski standard je istoveten z: prEN 13084-9
ICS:
13.020.60 Življenjski ciklusi izdelkov Product life-cycles
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
oSIST prEN 13084-9:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 13084-9:2021
---------------------- Page: 2 ----------------------
oSIST prEN 13084-9:2021
DRAFT
EUROPEAN STANDARD
prEN 13084-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS 91.060.40
English Version
Free-standing chimneys - Part 9: Lifetime management -
Monitoring, inspection, maintenance, remedial and
reporting; Operations and actions required

Cheminées autoportantes - Partie 9 : Gestion du cycle Freistehende Industrieschornsteine - Teil 9:

de vie - Surveillance, inspection, maintenance, mesures Lebensdauermanagement - Überwachung, Inspektion,

correctives et établissement de rapports ; opérations et Wartung, Sanierungsmaßnahmen und Dokumentation;

actions requises Erforderliche Maßnahmen und Verfahren

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 297.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13084-9:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Maintenance and inspection ....................................................................................................................... 7

4.1 General structure of the maintenance operations .............................................................................. 7

4.2 Maintenance and inspection plan by the manufacturer ................................................................... 7

4.3 Maintenance and inspection plan by the owner/operator .............................................................. 8

4.4 General Inspection ....................................................................................................................................... 10

5 Repair works .................................................................................................................................................. 19

5.1 General.............................................................................................................................................................. 19

5.2 The competence of the company carrying out the repair works................................................. 20

5.3 Result expected from repair works ........................................................................................................ 20

5.4 Description and preparation of repair works .................................................................................... 20

5.5 Execution of repair works and security ................................................................................................ 20

5.6 Record of works completed, and results obtained ........................................................................... 22

Annex A (informative) Provisions concerning the use of work equipment provided for

temporary work at a height ...................................................................................................................... 23

Annex B (informative) Examples of damages with associated level of criticality .............................. 27

Bibliography ................................................................................................................................................................. 28

---------------------- Page: 4 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
European foreword

This document (prEN 13084-9:2021) has been prepared by Technical Committee CEN/TC 297

“Free-standing industrial chimneys”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.

This document is Part 9 in a series of standards and as such is not a stand-alone document. The

requirements in Parts 1 to 8 of this series are integral to Part 9.
EN 13084, Free-standing chimneys consists of the following parts:
— Part 1: General requirements
— Part 2: Concrete chimneys
— Part 4: Brick liners — Design and execution
— Part 5: Material for brick liners — Product specifications
— Part 6: Steel liners — Design and execution

— Part 7: Product specifications of cylindrical steel fabrications for use in single wall steel chimneys and

steel liners
— Part 8: Design and execution of mast construction with satellite components

— Part 9: Life-Time Management — Monitoring, Inspection, Maintenance, Remedial and Reporting;

operations and actions
The following documents additionally apply:

— EN 1993-3-1, Eurocode 3 — Design of steel structures — Part 3-1: Towers, masts and chimneys —

Towers and masts

— EN 1993-3-2, Eurocode 3 — Design of steel structures — Part 3-2: Towers, masts and chimneys —

Chimneys
---------------------- Page: 5 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
Introduction

The standard EN 1990 indicates as a principle that in order to ensure adequate durability of the

structure, several factors should be taken into account including the expected maintenance during the

period of project use.

The same standard also states as a principle that proper inspections and maintenance according to the

procedures specified in the project documentation should be stated to insure the required level of

reliability.

The standard EN 13084-1 requires in Clause 7 that the chimneys be checked at regular intervals by an

expert. The interval should not exceed two years between any checks. A written report should include

recommendations for maintenance and repair.

When planning new-build or refurbishment projects, architects, designers, manufacturers and

contractors have duties under European Directive 92/57/EEC 24 June 1992 on the implementation of

minimum safety and health requirements at constructions sites (The Construction Design and

Management Regulations), to consider the need for work to be carried out at height over the lifespan of

a building, e.g. to clean, maintain and repair it, and they should design out the need to work at height if

possible.

It is therefore necessary to specify the various operations to be carried out both in inspection and

maintenance so as to clarify the various points of intervention in order to prolong the duration of use

and reliability of the structure. The summary of this standard is as detailed in contents below.

---------------------- Page: 6 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
1 Scope

This document deals with the general requirements and the basic performance inspection, maintenance

and reporting criteria for the Lifetime management, Monitoring, Inspection, Maintenance, Cleaning,

Repair and Remedial work including the Reporting; Operations and Actions Required of all types of

structurally independent chimneys. This document applies to any windshield, single stack, tower, mast

and liners covered by the EN 13084 series.

The Lifetime management takes into account the original structural and operating design of the

structurally independent chimneys under operational conditions and other actions to verify that

mechanical resistance and stability and safety in use are continued at the designed for level as expected

and/or adapted to changes in the operational requirements of the structure and/or its environment.

NOTE In other parts of the EN 13084 series, rules will be given where chimney products in accordance with

EN 1443 (and the relating product standards) may be used in structurally independent chimneys.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 365, Personal protective equipment against falls from a height - General requirements for instructions

for use, maintenance, periodic examination, repair, marking and packaging
EN 1990, Eurocode - Basis of structural and geotechnical design

EN 1993-1-11, Eurocode 3 - Design of steel structures - Part 1-11: Design of structures with tension

components
EN 62305-1, Protection against lightning - Part 1: General principles
EN 62305-2, Protection against lightning - Part 2: Risk management

EN 62305-3, Protection against lightning - Part 3: Physical damage to structures and life hazard

EN 62305-4, Protection against lightning - Part 4: Electrical and electronic systems within structures

EN ISO 14122-4:2016, Safety of machinery - Permanent means of access to machinery - Part 4: Fixed

ladders (ISO 14122-4:2016)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
accessible space
space between windshield and liner that is designed for entry by personnel
---------------------- Page: 7 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
3.2
condition monitoring

visual inspection, on a regular basis, of the structure and its components in order to identify any

significant change
3.3
criticality level

priority, quality and/or state of the required maintenance of the chimney and of all the components of

the flue ducts as a hierarchical level of importance defined as three different categories of criticality

(high, medium, and low)
3.4
design working life

period for which a structure is expected to be used for its intended purpose to ensure durability against

environmental actions and fatigue
3.5
expert

person who has scientific and technical theoretical knowledge in a field of activity validated by

approved education certificates and / or as well as in-depth knowledge and practical skills validated by

a recognized experience of a professional activity of several years in the field of activity concerned

3.6
general inspection

assessment of the complete structure by an expert to ensure that it is still in serviceable condition or to

indicate necessary maintenance or repairs
3.7
lining system (lining)

total system, if any, which separates the exhaust or flue gases from the windshield, comprising a liner

and its supports, the space between liner and windshield and insulation, where existing

3.8
liner
structural or non-structural membrane of the lining system
3.9
maintenance operations

combination of all planned technical, administrative and managerial actions during the life cycle of an

item intended to retain it in, or restore it to, a state in which it can perform the required function

3.10
repair operations

operations carried out to restore or preserve the function of an element that are not part of the planned

and implemented maintenance
3.11
windshield

structural independent shell designed for load bearing purposes and to protect the flue from wind

actions
---------------------- Page: 8 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
4 Maintenance and inspection
4.1 General structure of the maintenance operations

Eurocode EN 1990 requires that the structures shall be designed such that deterioration over its design

working life does not impair the performance of the structure below that intended, having due regard to

its environment and the anticipated level of maintenance. The following should be taken into account:

— the intended or foreseeable use of the structure;
— the required design criteria;
— the expected environmental conditions;
— the composition, properties and performance of the materials and products;
— the properties of soil;
— the choice of the structural system;
— the shape members and the structural detailing;
— the quality of workmanship and the level of control;
— the particular protective measures;
— the intended maintenance during the design working life.

For all types of structurally independent chimneys structures, the maintenance operations shall be

done according to the following steps to preserve durability and performances:
— maintenance required by the chimney manufacturer (see 4.2);
— survey and maintenance to be done by the owner/operator (see 4.3);
— general inspection of the installation (see 4.4).
4.2 Maintenance and inspection plan by the manufacturer

As required by EN 1990, the manufacturer should include the inspection and maintenance plans in the

project documentation (Operating and Maintenance manual) delivered at the commissioning and

handover phase of a new project, in order to insure the required level of reliability as per the structure

and plant design and calculations.

The manufacturers maintenance and inspection plan shall at least include all relevant points of 4.3 for

chimney and equipment.

If necessary, depending on the project specifications, manufacturers can provide more restrictive

recommendations for some or all parts and equipment.
---------------------- Page: 9 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
4.3 Maintenance and inspection plan by the owner/operator
4.3.1 General

It is the responsibility of the owner to maintain the installation in a good state. To guarantee the good

operation of the installation and to spot any deterioration which could lead to a fault, the owner shall

ensure all the maintenance and inspection operations detailed in the Operating and Maintenance

manual provided by the manufacturer.

Without any other recommendations, the following operations shall be carried out:

— regular maintenance operations listed under 4.3.2;
— regular monitoring conditions listed under 4.3.3.

The maintenance operations and inspection plan shall be fulfilled by the owner/operator himself or by

a third-party company competent for this type of work.
4.3.2 Maintenance operations
4.3.2.1 General

Without any other recommendations, the following maintenance operations shall be carried out.

4.3.2.2 Safety valves

If the installation includes explosion or implosion relief valves, these safety systems shall be dismantled

and sent back to the manufacturer at least once a year in order to be recalibrated and reconditioned

(note. a spare new set can be kept on site to allow for continuous use of the plant).

4.3.2.3 Cleaning operations
The following cleaning operations shall be carried out:
— cleaning of base drains;
— cleaning of condensate drain-pipes;
— cleaning of rainwater drain-pipes;

— sweeping of flue liners and connecting flue pipes with appropriate brushes, plastic-based for

stainless steel flues and metallic-based for mild steel flues;

— if a silencer is installed, cleaning of the condensate pipes and the baffles if applicable.

4.3.2.4 Coating system

To achieve the stated coat life span and increase the life span of the finish, it is necessary to provide on-

going site maintenance / repair and/or overcoating of the paint finish. This operation shall be carried

out as per the paint manufacturers recommendations and requirements for site application with the

objective to provide the same level of protection (where possible taking into full account the conditions

of on-site application and environment) in durability and time as per the original factory finished

coating specification.
---------------------- Page: 10 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
4.3.3 Condition Monitoring
4.3.3.1 General

Regular condition monitoring is required and should extend to all visually recognizable changes to the

structure and components.

This inspection is carried out from ground level and/or into the chimney’ accessible space if any. For

installations higher than 20 m, the use of appropriate access and minimum binoculars is required for a

correct monitoring.
Visual inspection of the following elements shall be carried out.
4.3.3.2 Windshield and liner(s)

As a minimum, the following points shall be checked on the windshield and liner(s):

— leaning, sinking and loosening of guy wires;

— circular oscillation of the chimney of large amplitude even under low wind speeds;

— cracks, splits, perforations, impacts, and any structural damage;

— loosening and oxidation of nuts and bolts (anchorage, joints, base plate, guy wires);

— jamming of inspection doors and measuring plugs;
— piece of material on the surrounding grounds for a brick or concrete chimney;
— staining, dripping, corrosion marks;
— colouring, stains or runs of condensates on the windshield or liner(s);
— large amount of condensation inside the windshield.
4.3.3.3 Thermal insulation (Liner and/or windshield)
As a minimum, the following points shall be checked on thermal insulations:
— deterioration of the insulation material;

— deterioration of the cladding if any like hole, bump, twisted or missing elements;

— trace of liquid runoff.

An Infrared image examination of hot chimneys could be used to identify hot spots and thermal bridges

where insulation’ thermal properties are altered or where it has collapsed.
4.3.3.4 Equipment and accessories

As a minimum, the following points shall be checked on equipment and accessories:

— presence of loose elements (platform plates or gratings, ladder parts, cladding plates, lightning

protection, cables, etc.);
— discontinuity in the lightning protection system;

— deterioration of the day-time or night-time aircraft warning systems (lights or painting);

---------------------- Page: 11 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)

— in silencers, damage to the absorbing material or its casing (tear), obstruction of condensate pipes,

issue with general design (impact, perforation, condensate staining)
— physical deterioration/burst or any trace of leakage on the damper if any.
4.3.4 Frequency (Intervals)

Maintenance operations and condition monitoring shall be carried out no later than 3 months after the

chimney / exhaust has been commissioned and put into operation in order to detect any potential

troubles on the plant.

Afterward, the maintenance operations and condition monitoring shall be performed every 6 months or

before restart after a long-term shutdown, or after any extraordinary occurrences like heavy storms,

unusually heavy icing.

The frequency may be reduced according to the Operating and Maintenance manual provided by the

manufacturer.

For specific cases where installations work continuously for longer than six months, maintenance and

inspection of the external parts of the chimney shall be carried out at the normal frequency. The

internal parts of flue liners, connecting ducts and specific equipment shall be inspected each time the

installation is stopped.
4.3.5 Record and repair actions if necessary

Records of the maintenance operations and condition monitoring shall be recorded in a report which

shall be attached to the operating and maintenance manual for future record reviews.

Any anomaly spotted during the condition monitoring shall be reported to the chimney manufacturer

or to an expert without delay. The best course of action will then be advised by the chimney

manufacturer or by the expert according to the risks presented by the installation.

4.4 General Inspection
4.4.1 General

The general inspection will assess the performance and the state of the installation as a whole,

according to the design operating requirements of the chimney(s) and plant(s).

The objective is to ascertain that the chimney, lining and components are still in serviceable condition

and fulfilling their designed requirements and tasks, or to indicate necessary maintenance or repair

operations to recover them.

This inspection is to be entrusted to an expert who can also assess the structural conditions of the

structures.
4.4.2 Frequency (intervals)

A first general inspection shall be carried out no later than 3 to 12 months after the chimney / exhaust

has been commissioned and put into operation. This delay starts at chimney erection when damper is

present at the chimney mouth.

At a period as recommended in the operating and maintenance manuals of the manufacturer and at a

minimum of every 2 years, the installation shall be inspected by a chimney expert.

For specific cases where installations work continuously for longer than two years, general inspection

shall take place each time the installation is stopped. During this period, the operating data to

determine the degree of chemical stress should be checked.
---------------------- Page: 12 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)

The general inspection shall be planned at the expected end date of the chimney’s, exhaust’s operational

lifetime. During this end date inspection, the expert can propose to prolong/extend the life expectancy

of the chimney without any additional work to be carried out or propose, recommended repair and

renovation work that would enable the expected lifespan of the chimney, exhaust to be extended.

A warrantee issue shall require the manufacturer/supplier to carry out an inspection report and

corrective actions as required in accordance with the warrantee specification.

Depending on the conditions of use and on the potential risk for the structure of the stack and its

environment, the expert or the manufacturer of the chimney can recommend a general inspection

frequency shorter than the normal 2 years interval based on the following criteria:

— type of fuel;
— intermittent or continuous operation;
— thermal and chemical attacks;

— thermal shocks, due to sudden change of temperature during operation and/or too quick start-up

or shutdown.
4.4.3 General inspection for all types of chimneys
4.4.3.1 General
Inspection and maintenance shall consist of the following stages:

— consult the design operating conditions of the chimney, lining and equipment in the project

documentation;

— viewing the records of maintenances and inspections operations, repairs and modification

operations, and previous general inspection reports;

— preparing for inspection by identifying particularly vulnerable zones and determining the

resources required for measurements and the taking of samples if needed;
— analysing the data collected in a report giving;
— general impression;
— interpretation of measured values;
— conclusions from visual observations;
— conclusions from laboratory tests when required;
— estimation of the rate of ageing;

— state on the criticality level of any spotted default and indicate appropriate repair works.

The general inspection of chimney and liner can be performed by the following methods:

— use of a thermal-camera and ultra-sonic testing to avoid chimney shut down;

— use of mobile inspection platform or crane cage or rope access or a remote-control camera system

after the chimney operation is shut down.
---------------------- Page: 13 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
4.4.3.2 Windshield

Windshields and their external and internal components shall be inspected as detailed in the following

clauses. As a minimum, the following points shall be inspected:

— carry out close visual examination over the complete surface of the external face of the shell and

where / when necessary carry out an ultra-sonic survey of chimney shell in sufficient detail to

allow any significant loss of section to be detected;

— inspect all Flanged Joints and their mechanical fixings, tap flange bolts & holding down bolts with a

hammer to ‘sound’ for any evidence of cracking. When necessary, remove fixings from each flange

for microscopic examination for defects. Bolts should then be tested for ultimate tensile failure for

comparison against the required rating of the bolts;

— base plate holding down bolts and their protective cover where necessary carry out an ultra-sonic

survey of the holding down bolts securing structure stack to foundation/ building can be used to

determine the extent of any deterioration/corrosion;

— all applied torque loadings on flanges and base plate (shall be re-torqued if required to the load

levels as defined by the original designer);

— examine and inspect all fixed access equipment and fall arrest system, e.g. Ladders, Platforms,

Hand-rails, etc.

— examine any installed lightning protection system for compliance with current standards and carry

out electrical tests for continuity and resistance to earth.

The requirements in the same clauses, will also apply to inspecting and maintaining Supporting-Masts

structures.
4.4.3.3 Liner
As a minimum, the following points shall be checked:
— jamming of inspection doors and measuring plugs;
— clogging up (unusually large deposit of soot in flues and inlets);
— cracks, splits, perforations, impacts;

— pooling of water or condensates in drains at the base of the flues / blockage of the condensate

drains;
— integrity and functionality of the liner supports;
— integrity and functionality of the compensators;

— inspect all flanged Joints and their mechanical fixings, tap flange bolts & holding down bolts with a

hammer to ‘sound’ for any evidence of cracking. When necessary, remove fixings from each flange

for microscopic examination for defects. Bolts should then be tested for ultimate tensile failure for

comparison against the required rating of the bolts;
— reduction in thickness, due mainly to the following:
— thermal shocks,
---------------------- Page: 14 ----------------------
oSIST prEN 13084-9:2021
prEN 13084-9:2021 (E)
— chemical attacks,
— erosion and wear,
— frost action;
— cracks that can be divided into:
— local micro-cracks and commonly, consequent macro-cracks,
— cracks involving large sections of liner;
— restriction of free move-ability of the liner section due to:

— chemical reactions between condensates and brickwork causing irreversible expansion and

consequently jamming of expansion joints,
— reduced efficiency of joints due to solid deposits,
— lack of clearance between liner(s) and their supports.
4.4.3.4 Insulation

The integrity of the insulation has great influence on the life of all liners. The insul

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.