Safety of machinery - Safety requirements for the design and construction of paper making and finishing machines - Part 17: Tissue making machines

This European Standard applies to tissue making machines for the production of soft and crepe paper and applies together with EN 1034-1:2000+A1:2010. It deals with all significant hazards, hazardous situations and hazard events relevant to tissue making machines when used as intended and under the conditions foreseen by the manufacturer (see Clause 4). This document does not deal with pressure hazards in steam-heated drying cylinders and Yankee cylinders.

Sicherheit von Maschinen - Sicherheitstechnische Anforderungen an Konstruktion und Bau von Maschinen der Papierherstellung und Ausrüstung - Teil 17: Tissuemaschinen

Die vorliegende Europäische Norm gilt für Tissuemaschinen, die zur Herstellung von weichen oder gekreppten Papiersorten bestimmt sind, und ist in Verbindung mit EN 1034-1:2000+A1:2010 anzuwenden. Sie behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefährdungsereignisse für Tissuemaschinen, die bestimmungsgemäß und unter den vom Hersteller vorzusehenden Bedingungen verwendet werden (siehe Abschnitt 4).
Nicht behandelt werden druckbedingte Gefährdungen in dampfbeheizten Zylindern und Yankee-Zylindern.
ANMERKUNG      Die grundlegenden Sicherheitsanforderungen für Druckgeräte sind in der Druckgeräte-Richtlinie 97/23/EG enthalten.
Diese Norm gilt nicht für:
-   Papier- und Kartonmaschinen;
-   Doubliermaschinen;  
-   Maschinen zur Verarbeitung von Tissue.
Im derzeitigen Stadium der Norm werden Tissuemaschinen, bei denen die Blattbildung im Trockenverfahren erfolgt, nicht behandelt. Diese Maschinen sollen später in die Norm aufgenommen werden.
Dieses Dokument gilt nicht für Tissuemaschinen, die vor dem Datum der Veröffentlichung als Europäische Norm hergestellt wurden.

Sécurité des machines - Prescriptions de sécurité pour la conception et la construction de machines de fabrication et de finition du papier - Partie 17: Machines de fabrication du papier non tissé

La présente Norme européenne s'applique aux machines de fabrication du papier non tissé employées pour
la production de papier crêpe doux et s'applique conjointement à l'EN 1034-1:2000+A1:2010. Elle traite de
tous les phénomènes dangereux, situations et événements dangereux significatifs spécifiques aux machines
de fabrication du papier non tissé, lorsqu'elles sont utilisées normalement et dans les conditions prévues par
le constructeur (voir Article 4).
Le présent document ne traite pas des phénomènes dangereux engendrés par la pression dans les cylindres
sécheurs chauffés à la vapeur et les cylindres Yankee.
NOTE La Directive 97/23/CE donne les exigences essentielles de sécurité pour les équipements sous pression.
Le présent document ne s'applique pas aux :
- machines de fabrication du papier et du carton ;
- visiteuses pour papier non tissé (machines de fabrication de papier multicouches) ;
- machines de transformation du papier non tissé.
A ce stade, la présente norme ne traite pas des machines de fabrication du papier non tissé appliquant un
procédé par voie sèche pour la formation des feuilles. Ces machines doivent être incorporées dans la norme
à une date ultérieure.
Le présent document ne s'applique pas aux machines de fabrication du papier non tissé fabriquées avant la
date de publication du présent document par le CEN.

Varnost strojev - Varnostne zahteve za načrtovanje in konstrukcijo strojev in opreme za izdelavo papirja - 17. del: Stroji za izdelavo vpojnega papirja

Ta evropski standard se nanaša na stroje za izdelavo vpojnega papirja, ki se uporabljajo pri izdelavi mehkega in krep papirja, pri čemer velja skupaj s standardom EN 1034-1:2000+A1:2010. Opisuje večja tveganja, nevarne situacije in nevarne dogodke v zvezi s stroji za izdelavo vpojnega papirja, kadar se uporabljajo v skladu z njihovim namenom in pod pogoji, ki jih določa proizvajalec (glejte točko 4). Ta dokument ne obravnava nevarnosti tlaka v parno ogrevanih sušilnih cilindrih in cilindrih Yankee.

General Information

Status
Published
Publication Date
10-Sep-2012
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
28-Aug-2012
Due Date
02-Nov-2012
Completion Date
11-Sep-2012

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheit von Maschinen - Sicherheitstechnische Anforderungen an Konstruktion und Bau von Maschinen der Papierherstellung und Ausrüstung - Teil 17: TissuemaschinenSécurité des machines - Prescriptions de sécurité pour la conception et la construction de machines de fabrication et de finition du papier - Partie 17: Machines de fabrication du papier non tisséSafety of machinery - Safety requirements for the design and construction of paper making and finishing machines - Part 17: Tissue making machines85.100Oprema za papirno industrijoEquipment for the paper industry21.020Characteristics and design of machines, apparatus, equipment13.110Varnost strojevSafety of machineryICS:Ta slovenski standard je istoveten z:EN 1034-17:2012SIST EN 1034-17:2012en,fr,de01-oktober-2012SIST EN 1034-17:2012SLOVENSKI

STANDARD
SIST EN 1034-17:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1034-17
August 2012 ICS 85.100 English Version

Safety of machinery - Safety requirements for the design and construction of paper making and finishing machines - Part 17: Tissue making machines

Sécurité des machines - Prescriptions de sécurité pour la conception et la construction de machines de fabrication et de finition du papier - Partie 17: Machines de fabrication du papier non tissé

Sicherheit von Maschinen - Sicherheitstechnische Anforderungen an Konstruktion und Bau von Maschinen der Papierherstellung und Ausrüstung - Teil 17: Tissuemaschinen This European Standard was approved by CEN on 13 July 2012.

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 CEN-CENELEC 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 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1034-17:2012: ESIST EN 1034-17:2012

EN 1034-17:2012 (E) 2 Contents Page Foreword ...................................................................................................................................................................... 4Introduction ................................................................................................................................................................. 61Scope .............................................................................................................................................................. 72Normative references .................................................................................................................................... 73Terms and definitions ................................................................................................................................. 104List of significant hazards .......................................................................................................................... 155Safety requirements and/or measures ...................................................................................................... 175.1General .......................................................................................................................................................... 175.2Workplaces, means of access, walkways, passageways ........................................................................ 185.3Start-up warning device .............................................................................................................................. 185.4Emergency stop device and braking system ............................................................................................ 195.5Isolation and energy dissipation, prevention of unexpected start-up ................................................... 205.6Electric drive system and power transmission elements........................................................................ 205.7Control system and actuators .................................................................................................................... 215.8Electrical equipment .................................................................................................................................... 225.9Hydraulic equipment ................................................................................................................................... 225.10Pneumatic equipment ................................................................................................................................. 225.11Equipment and measures for make-ready, maintenance and lubrication ............................................. 225.12Equipment and measures for cleaning and removal of broke ................................................................ 235.13Noise ............................................................................................................................................................. 245.14Hot surfaces ................................................................................................................................................. 255.15Integrated lighting........................................................................................................................................ 255.16Ergonomic principles .................................................................................................................................. 255.17Paper dust, health hazards and explosive atmospheres and zones ...................................................... 255.18Chemical substances .................................................................................................................................. 265.19Fire ................................................................................................................................................................ 265.20Rolls, outer rolls........................................................................................................................................... 275.21Water jet knives, tail cutters, severing knives, rotary knives ................................................................. 285.22Machine-specific tools ................................................................................................................................ 285.23Drying cylinders, Yankee cylinder, Steam and condensate system ...................................................... 295.24Whole body access to confined spaces .................................................................................................... 295.25Tail and web threading equipment ............................................................................................................. 295.26Felts and wires ............................................................................................................................................. 305.27Former section (wire section) ..................................................................................................................... 305.28Press section ................................................................................................................................................ 315.29Drying section .............................................................................................................................................. 325.30Calenders (in-line calenders) ...................................................................................................................... 335.31Measuring unit ............................................................................................................................................. 335.32Reel up section ............................................................................................................................................ 345.33Roll handling equipment in the reel section or in the near vicinity ........................................................ 385.34Pulpers and their loading facilities ............................................................................................................ 386Verification of safety requirements and/or measures .............................................................................. 397Information for use ...................................................................................................................................... 397.1General information ..................................................................................................................................... 397.2Instruction handbook .................................................................................................................................. 397.3Marking ......................................................................................................................................................... 41Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC ......................................................................................................................... 42Bibliography .............................................................................................................................................................. 43 SIST EN 1034-17:2012

EN 1034-17:2012 (E) 3

Figures Figure 1 — Example of a large complex tissue making machine with a "closed" reel section (Safety devices are not shown) ................................................................................................................................................................. 11Figure 2 — Example of a tissue making machine with an "open" reel section (Safety devices are not shown) ........ 12Figure 3 — Example of the former and press section on a tissue making machine .................................................. 13Figure 4 — Example of a reel section (Safety devices are not shown) ...................................................................... 14Figure 5 — Safety distance ≥ 2,70 m on drum reeler ................................................................................................. 34Figure 6 — Safety distance ≥ 500 mm to prevent crushing by reels behind the drum reeler .................................... 37 Tables Table 1 — List of significant hazards .......................................................................................................................... 16Table 2 — List of safety functions, Performance Level and Safety Integrity Level specified in this standard ........... 21Table 3 — Methods used to verify safety requirements and/or measures ................................................................. 39 SIST EN 1034-17:2012

EN 1034-17:2012 (E) 4 Foreword This document (EN 1034-17:2012) has been prepared by Technical Committee CEN/TC 198 “Printing and Paper Machinery - Safety”, 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 February 2013, and conflicting national standards shall be withdrawn at the latest by February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. 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 EU Directive 2006/42/EC. For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. EN 1034, Safety of machinery — Safety requirements for the design and construction of paper making and finishing machines consists of the following parts:  Part 1: Common requirements  Part 2: Barking drums  Part 3: Rereelers and winders  Part 4: Pulpers and their loading facilities  Part 5: Sheeters  Part 6: Calender  Part 7: Chests  Part 8: Refining plants  Part 13: Machines for de-wiring bales and units  Part 14: Reel splitter  Part 16: Paper and board making machines  Part 17: Tissue making machines (the present document)  Part 21: Coating machines  Part 22: Wood grinders  Part 26: Roll packaging machines  Part 27: Roll handling systems

According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, SIST EN 1034-17:2012

EN 1034-17:2012 (E) 5 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1034-17:2012

EN 1034-17:2012 (E) 6 Introduction This document is a type C standard as stated in EN ISO 12100:2010. The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document. For machines that have been designed and built according to the provisions of this C standard, the following stipulation applies: where provisions of this type C standard are different from those which are stated in type A or B standards, or from provisions made in EN 1034-1:2000+A1:2010, the provisions of this type C standard take precedence over the provisions of the other standards. SIST EN 1034-17:2012

EN 1034-17:2012 (E) 7

1 Scope This European Standard applies to tissue making machines for the production of soft and crepe paper and applies together with EN 1034-1:2000+A1:2010. It deals with all significant hazards, hazardous situations and hazard events relevant to tissue making machines when used as intended and under the conditions foreseen by the manufacturer (see Clause 4).

This document does not deal with pressure hazards in steam-heated drying cylinders and Yankee cylinders.

NOTE Directive 97/23/EC gives essential safety requirements for equipment under pressure. This document does not apply to:  paper and board making machines;

 tissue winder (plying machines);

 tissue converting machines. At this stage this standard does not deal with tissue making machines which apply the dry process for sheet forming. These machines are intended to be included in the standard at a later date. This document is not applicable to tissue making machines which are manufactured before the date of publication of this document by CEN. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 349:1993+A1:2008, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body EN 547-1:1996+A1:2008, Safety of machinery — Human body measurements — Part 1: Principles for determining the dimensions required for openings for whole body access into machinery EN 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 614-2:2000+A1:2008, Safety of machinery — Ergonomic design principles — Part 2: Interaction between the design of machinery and work tasks EN 626-1:1994+A1:2008, Safety of machinery — Reduction of risks to health from hazardous substances emitted by machinery — Part 1: Principles and specifications for machinery manufacturers EN 746-1:1997+A1:2009, Industrial thermoprocessing equipment — Part 1: Common safety requirements for industrial thermoprocessing equipment EN 746-2:2010, Industrial thermoprocessing equipment — Part 2: Safety requirements for combustion and fuel handling systems EN 894-1:1997+A1:2008, Safety of machinery — Ergonomic requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators EN 894-2:1997+A1:2008, Safety of machinery — Ergonomic requirements for the design of displays and control actuators — Part 2: Displays SIST EN 1034-17:2012

EN 1034-17:2012 (E) 8 EN 953:1997+A1:2009, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards EN 1034-1:2000+A1:2010, Safety of machinery — Safety requirements for the design and construction of paper making and finishing machines — Part 1: Common requirements EN 1034-4:2005+A1:2009, Safety of machinery — Safety requirements for the design and construction of paper making and finishing machines — Part 4: Pulpers and their loading facilities EN 1034-6:2005+A1:2009, Safety of machinery — Safety requirements for the design and construction of paper making and finishing machines — Part 6: Calender EN 1037:1995+A1:2008, Safety of machinery — Prevention of unexpected start-up EN 1088:1995+A2:2008, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection EN 1127-1:2011, Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts and methodology EN 1760-1:1997+A1:2009, Safety of machinery — Pressure sensitive protective devices — Part 1: General principles for the design and testing of pressure sensitive mats and pressure sensitive floors EN 1760-2:2001+A1:2009, Safety of machinery — Pressure sensitive protective devices — Part 2: General principles for the design and testing of pressure sensitive edges and pressure sensitive bars EN 1837:1999+A1:2009, Safety of machinery — Integral lighting of machines EN 12198-1:2000+A1:2008, Safety of machinery — Assessment and reduction of risks arising from radiation emitted by machinery — Part 1: General principles EN 13023:2003+A1:2010, Noise measurement methods for printing, paper converting, paper making machines and auxiliary equipment — Accuracy grades 2 and 3 EN 13463-1:2009, Non-electrical equipment for use in potentially explosive atmospheres — Part 1: Basic method and requirements EN 13478:2001+A1:2008, Safety of machinery — Fire prevention and protection EN 14491:2006, Dust explosion venting protective systems EN 60079-0:2009, Explosive atmospheres – Part 0: Equipment – General requirements (IEC 60079-0:2007) EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements

(IEC 60204-1:2005, modified) EN 60204-11:2000, Safety of machinery — Electrical equipment of machines — Part 11: Requirements for HV equipment for voltages above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV (IEC 60204-11:2000) EN 61000-6-2:2005, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for industrial environments (IEC 61000-6-2:2005) EN 61241-0, Electrical apparatus for use in the presence of combustible dust – Part 0: General requirements (IEC 61241-0:2004, modified + corrigendum November 2005) EN 61496-1:2004, Safety of machinery — Electro-sensitive protective equipment — Part 1: General requirements and tests (IEC 61496-1:1997, modified) EN 61511-1:2004, Functional safety — Safety instrumented systems for the process industry sector — Part 1: Framework, definitions, system, hardware and software requirements (IEC 61511-1:2003 + Corrigendum 2004) SIST EN 1034-17:2012

EN 1034-17:2012 (E) 9 EN 61511-2:2004, Functional safety — Safety instrumented systems for the process industry sector — Part 2: Guidelines for the application of IEC 61511-1 (IEC 61511-2:2003) EN 61800-3:2004, Adjustable speed electrical power drive systems — Part 3 EMC requirements and specific test methods (IEC 61800-32004) EN 62061:2005, Safety of machinery — Functional safety of safety-related electrical, electronic and programmable electronic control systems (IEC 62061:2005) EN ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their components (ISO 4413:2010) EN ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their components (ISO 4414:2010) EN ISO 11957:2009, Acoustics — Determination of sound insulation performance of cabins — Laboratory and in situ measurements (ISO 11957:1996) EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction (ISO 12100:2010) EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006) EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006) EN ISO 13849-2:2008, Safety of machinery — Safety-related parts of control systems — Part 2: Validation

(ISO 13849-2:2003) EN ISO 13850:2008, Safety of machinery — Emergency stop — Principles for design (ISO 13850:2006) EN ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of parts of the human body (ISO 13855:2010) EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008) EN ISO 14122-1:2001, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of fixed means of access between two levels (ISO 14122-1:2001) EN ISO 14122-2:2001, Safety of machinery — Permanent means of access to machinery — Part 2: Working platforms and walkways (ISO 14122-2:2001) EN ISO 14122-3:2001, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders and guard-rails (ISO 14122-3:2001) EN ISO 14122-4:2004, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders (ISO 14122-4:2004) SIST EN 1034-17:2012

EN 1034-17:2012 (E) 10 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 1034-1:2000+A1:2010,

EN ISO 12100:2010 and the following apply: 3.1 tissue soft crepe paper with a grammage normally less than 25 g/m² Note 1 to entry: Soft tissue is the base material for certain single-ply and multi-ply products such as serviettes, towels, handkerchiefs, toilet paper, tea-bag´s etc.

3.2 tissue making machine an assembly of machine sections systems extending from the head box to the reel-up unit and including former (wire) section, press section, dryer section, calender, measuring units, reel-up unit and reel stand including machine pulpers, shaft puller equipment, lifting table, core bin exit device, machine process ventilation

Note 1 to entry: Drive system, control system(s), hydraulic system, lubrications system etc. are also included in the scope. EXAMPLE 1 A large complex tissue making machine with a "closed" reel section where the parent roll ends up at a lifting table for further handling such as:  kick out on a conveyor, kick out on the floor (lifting table in lower position);  lifting the paper roll away with an overhead crane;  fetching the paper roll with a truck or with an auto carrier or a combination. Note 2 to entry: Figure 1 illustrates a large complex tissue making machine with a "closed" reel section. SIST EN 1034-17:2012

EN 1034-17:2012 (E) 11

Key 1 tissue making machine 2 former section (wire section) 3 press section 4 TAD dryer with hood and air systems 5 Yankee dryer, hood with air system 6 calender 7 measuring device 8 reel and reel stand 9 roll handling 10 broke chuter equipment 11 shaft puller 12 lifting table 13 hydraulic system 14 grease and/or oil lubrication system 15 mist removal system 16 control system 17 machine pulper 18 heat water or oil system 19 mechanical drive equipment 20 AC or DC drive system Figure 1 — Example of a large complex tissue making machine with a "closed" reel section

(Safety devices are not shown)SIST EN 1034-17:2012
EN 1034-17:2012 (E) 12

EXAMPLE 2 A tissue making machine with an "open" reel section where the finished paper rolls are ready to be picked up at the end station. In the "open" reel section the paper rolls normally are lifted away with an overhead crane. Figure 2 illustrates a tissue making machine with an "open" reel section.

Key 1 example tissue machine (open reel) 2 former section 3 press section 4 Yankee dryer/creeping ventilation (hood) 5 measuring unit 6 reel and reel stand 7 broke chuter 8 weighing station 9 end station 10 control system 11 hydraulic system 12 lubrication system 13 machine pulper 14 drive equipment 15 drive system/control system Figure 2 — Example of a tissue making machine with an "open" reel section

(Safety devices are not shown) 3.3 former section (wire section) device for forming a continuous web from fibre diluted in water (stock) using wire formers for forming the sheets and including head box, wires, rollers, roller stretching equipment, lifting devices and spraying pipes

Note 1 to entry: An example of the former and press section is shown in Figure 3. For sheet forming, the stock is supplied onto a large-diameter roll (forming roll) designed to preserve and enhance the paper properties created in the head box. The head box delivers the stock by means of spray jets with uniform velocity over the entire machine width. Growing demands for softness and more efficient fibre use have led to increased application of head boxes suitable for multiple-ply products. There are two types of former sections, one equipped with a pick-up system and one where the sheet is carried directly to the pressure rolls and the Yankee dryer so that a pick-up system is not required. 3.4 press section part of the wet end of a tissue making machine which carries out one or several press functions extending from the sheet pick-up to the first dryer section and including all pressure and lead rolls, spraying pipes, suction boxes and wire tension devices, being nowadays generally designed as cantilever for easier changing of felts and wires

Note 1 to entry: An example of a press section is illustrated in Figure 3. Felt conditioning is normally located between the last pressure roll and the first paper side felt roll in the return run. Tissue machines can be equipped with one or two pressure rolls. The first roll is normally a suction pressure roll and the optional second roll is a blind drilled roll. Press roll configuration influences the sheet properties and sheet dryness. Paper with higher bulk and softness can be produced on single-roll machines. SIST EN 1034-17:2012

EN 1034-17:2012 (E) 13
NOTE Safety devices are not shown. Key
spraying pipe
doctor
rolls
chemical spraying pipe 1 former section
2 press section

3 drying section 4 wire guide roll 5 couche/pick up roll 6 breast roll 7 felt tensing roll 8 wire guide roll 9 chemical spraying pipe 10 wire guide roll 11 cantiliver 12 spaying pipe 13 press roll

14 press roll

15 coating spraying pipe Figure 3 — Example of the former and press section on a tissue making machine

3.5 drying section section in which the water remaining in the web after wet pressing is evaporated by the action of the heat extending from first drying cylinder to where the calender and/or measuring unit area starts and including in some configurations broke chute equipment, broke conveyor, process ventilation equipment, tail threading equipment, sheet support equipment etc.

Note 1 to entry: Some terms special for the drying section are defined below.  Yankee cylinder (creping cylinder): steam-heated drying cylinder with a very large diameter and a polished surface, completely or largely responsible for drying the paper web. It works in conjunction with the press roll to dry the paper in combination with the drying hood and finally provides the surface of the creping process;  Yankee dryer: assembly within a Yankee cylinder, press roll and drying hood;  drying hood: equipment that functions to improve the drying process and the tissue quality by optimising the air temperature, velocity and distance to the tissue web Air circulation and heat recovery systems may also be included in this machinery;  creping: the creping process is affected by both the blade geometry and the surface conditions of the Yankee dryer. The creping process can be optimised by using adjustable creping doctors. Tissue making machines are normally equipped with spray systems for coating the Yankee surface with chemical substances;  through-air drying (TAD): method for increasing bulk and softness. Conventional tissue making machines press the sheet onto a Yankee cylinder. TAD removes water by a process to dry a sheet by passing high temperature air through the sheet that has not been pressed;  tail threading device: device for threading the paper web

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