Download pdf - 11-09-29 Deckblatt Vibration Mount - SB Broneske | Vibration · PDF file · 2016-07-227 Maintenence General Notes ... The world’s first FEM analysis of a vibration mount for exhaust

© Copyrights: Schwingungstechnik-Broneske GmbH – Ernst-Abbe-Straße 9 – 25451 Quickborn/Hamburg - Germany www.broneske.de [email protected]

Phone: +49-4106-80750-0 – Fax.: +49-4106-80750-10

Vibration Mounts Installation Instructions Manual www.broneske.de [email protected] Telephone: +49-4106-80750-0 Telefax.: +49-4106-80750-10

Schwingungstechnik-Broneske GmbH Ernst-Abbe-Str. 9 • D-25451 Quickborn • Germany Internet: www.broneske.de

Telephone: +49-4106-80750-0 Telefax: +49-4106-80750-10

Email: [email protected]

1 CONTENTS 1 Safety instructions Contents 1.1 Safety instructions Instruction manual 1.2 Safety instructions How to use 1.3 Safety instructions Protective clothing 1 1.4 Safety instructions Protective clothing 2 2 Why SB Broneske products? Contents 2.1 Why SB Broneske products? Inventor of the modern elastic support 2.2 Why SB Broneske products? Global Player 2.3 Why SB Broneske products? What is resilient mounting/elastic support for the exhaust pipe? 2.4 Why SB Broneske products? Why rubber based and not steel based mounts? 2.5 Why SB Broneske products? High quality products 2.6 Why SB Broneske products? How does the SB Broneske business work? 2.7 Why SB Broneske products? How to read the Technical Offer? 2.8 Why SB Broneske products? Calculations Technical Offer 1: Vibration Calculation 2.9 Why SB Broneske products? Calculations Technical Offer 2: Vibration Calculaton Example 3 Design Contents 3.1 Design: Fix point Contents 3.1.0 Design: Fix point Vibration mounts: Fix Points 3.1.1 Design: Fix point Vibration mounts: Fix Points (Compression Mount) 3.1.2 Design: Fix point Experimental test series: Temperature curve vibration mounts 3.1.3 Design: Fix point Fix points arrangement 3.1.4 Design: Fix point Brackets for Compression Mounts 3.1.5 Design: Fix point Installation of Compression Mount or Tension Compression Mount 3.1.6 Design: Fix point Tension Compression Fix Point Mount 3.2 Design: Anchorage point Contents 3.2.0 Design: Anchorage point Anchorage Point: Tension/Compression Mount 3.2.1 Design: Anchorage point Arrangement with two or three anchorages 3.2.2 Design: Anchorage point Angle between deck, vibration mount and pipe 3.2.3 Design: Anchorage point Maximum rotational deflection 3.2.4 Design: Anchorage point Threaded rod: Length in vertical pipe section 3.2.5 Design: Anchorage point Lashes/Pad eye brackets 3.2.6 Design: Anchorage point Alignment of pad eye brackets 3.2.7 Design: Anchorage point Alignment of angle steel 3.2.8 Design: Anchorage point False direction of anchorage point in vertical pipe 3.2.9 Design: Anchorage point Doupling 3.3 Design: Sliding Point Contents 3.3.1 Design: Sliding point Basics 3.3.2 Design: Sliding point Bushes 3.3.3 Design: Sliding point Oblonghole in Bracket 3.4 Design: Rain Caps Table: Comparison of rain caps

Schwingungstechnik-Broneske GmbH Ernst-Abbe-Str. 9 • D-25451 Quickborn • Germany Internet: www.broneske.de

Telephone: +49-4106-80750-0 Telefax: +49-4106-80750-10

Email: [email protected]

1 CONTENTS 4 Handling Contents 4.1 Handling Protecting the products from moisture 4.2 Handling Storage 4.3 Handling Transport 5 Assembly Contents 5.1 Assembly Lifetime of a Vibration Mount 5.2 Assembly Before assembling: Elastic Support 5.3 Assembly Before assembling, examine the following of the vibration mount: 5.4 Assembly ASSEMBLY 1 5.5 Assembly ASSEMBLY 2 5.6 Assembly Protection of the elastic support during assembling 5.7 Assembly Insulation of vibration mount 6 Commissioning and sea trail Contents 6.1 Commissioning and sea trail Prior to the commissioning and sea trail 6.2 Commissioning and sea trail During commissioning and sea trail 7 Maintenence General Notes 8 Causes of defects Contents 8.1 Causes of defects Damage caused by transportation, handling or installation 8.2 Causes of defects Damage caused by transportation, handling or installation 8.3 Causes of defects Damage caused by transportation, handling or installation 8.4 Causes of defects Damage caused by transportation, handling or installation 9 Warrenty Exclusion from the warranty

Contents

Schwingungstechnik-Broneske GmbHErnst-Abbe-Straße 9D-25451 Quickborn/Hamburg, GermanyInternet: www.broneske.de

Telephone: +49-4106-80750-0Fax.: +49-4106-80750-10

Email: [email protected] 4

Date: 29.09.2011

1.1 Instruction manual

1.2 How to use

1.3 Protective clothing 1

1.4 Protective clothing 2

Instruction manual


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Date: 29.09.2011

Before beginning installation, trained professionalsmust read this guide carefully.

The manual must have been read and understood.If you have any questions, please contact:

Ernst-Abbe-Str. 9D-25451 Quickborn/HamburgGermany

Telephone: +49-4106-80750-0Telefax: +49-4106-80750-10

Technical Hotline8:00 to 16:00 o'clock Central European Time CETTelephone: +49-4106-80750-33

Email: [email protected]: www.broneske.de

How to use


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The products are specially designed and produced toreduce vibrations, structure borne noise andcompensate thermal heat expansion in piping systems:

The maximum loads and the geometry of each productis calculated by SB Broneske engineers in accordancewith internationally valid regulations (such asengineering standards) and standardized calculations.

Products damaged during transport or storage mustnot be installed.

The manufacturer is not liable for damage suffered as aresult of transport or incorporation of damaged ordeformed parts!

Protective clothing 1


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During the installation or storage of products, safetyand protective clothing must be worn. These are forexample a protective suit and gloves.

Please take into account the country-specific securityprovisions for the installation or storage of suchproducts.

Protective clothing 2


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During the installation or storage of products, safetyand protective clothing must be worn. These are, forexample, safety footwear.

If welding work is carried out, a welding shield must beused.

Please take into account the country-specific securityprovisions for the installation or storage of suchproducts.

Contents


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2.1 Inventor of the modern elastic support

2.2 Global Player

2.3 What is resilient mounting/elastic support forthe exhaust pipe?

2.4 Why rubber based and not steel based mounts?

2.5 High quality products

2.6 How does the SB Broneske business work?

2.7 How to read the Technical Offer?

2.8 Calculations Technical Offer 1: Vibration Calculation

2.9 Calculations Technical Offer 2: Vibration Calculation

Inventor of the modern elastic support


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Date: 29.09.2011

The beginnings of SB Broneske go back to the late 60s.In the past century, Erwin Broneske developed themodern, elastic fixed-point mounts and the modernsway bracing (anchorage).

Erwin Broneske developed the elastic mountsespecially for the ship-building industry and the specialrequirements combined with modern ship-building.

Furthermore, in the early 70s, Erwin Broneskedeveloped the rubber-based elastic mount for exhaustpipes in the ship-building industry. Since then, therubber-based elastic mount has become an industrialstandard and has more or less superseded the steelspring mount.

Since the 70s, SB Broneske has successfullymanufactured more than 2 Million vibration mounts andhas sold them worldwide.

SB Broneske was the first company to carry thefollowing developments:-The world’s first rubber-based fix point mount (in the70s)–The world’s first rubber-based bracing (in the 70s) –The world’s first FEM analysis of a vibration mount forexhaust pipes and engine mounts (in the 90s)–The world’s first flexible fire- AND water-proofbulkhead pipe fitting (in the 21st century)-The world’s first labelling system for exhaust pipesystems (in the 21st century).

Global Player


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Since the 1970s, SB Broneske has been running severaloffices around the world or been working together withrepresentatives.

Employees in the SB Broneske offices and SB Broneskerepresentatives are educated at the highest engineeringlevel.

SB Broneske also runs storehouses in severalcountries to provide short delivery times for spare partsor fast deliveries for additional units.

Please ask the headquarters of SB Broneske foraddresses of SB Broneske offices or representativeoffices or storehouses around the world.

What is resilient mounting/elastic support for the exhaust pipe?


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Resilient mounting or elastic support includes vibrationmounts, elastic pipe penetrations, elastic rain caps andexpansion bellows.

These product groups reduce or eliminate structure-borne noise and vibrations very effectively. Theseproducts compensate the thermal heat expansion of theexhaust pipe sections.

SB Broneske products are specially designed to fulfilthese requirements on board of vessels.

Why rubber based and not steel based mounts?


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Elastomers are the genus for rubber-based or silicone-based materials that are assembled in the SB Broneskevibration mounts, bulkhead pipe fittings and rain caps.

Only elastomers can reduce vibrations and structure-borne noise, thanks to their physical properties. Ifelastomers are pressed together, then the property ofreducing vibrations and structure-borne noise isincreased (sound velocity in rubber is 45-90 m/s). Steelmesh springs, for example, do not have this property,because the steel spring passes on the vibration andstructure-borne noise very effectively (sound velocity insteel is 5000m/s), the more they are pressed together.Particularly in the ship-building industry, it is veryimportant to effectively reduce structure-borne noiseand vibrations. The drive motors and auxiliary motorson board a ship generate vibration and structure-bornenoise, which can spread throughout the ship.

High quality products


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SB Broneske is a traditional family-owned and -runcompany.

SB Broneske produces all vibration mounts, pipepenetrations, rain caps and expansion bellows in the SBBroneske owned factories in Germany.

SB Broneske employees are educated to the highestlevel in engineering or production.

SB Broneske only uses certified materials of highestquality to guarantee high product quality.

The quality of the elastomers used is of utmostimportance.

The elastomers used by SB Broneske have beenespecially developed for use on exhaust pipes in shipsand they usually have a life span of approx. 15 to 20years.

How does the SB Broneske business work?


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Before the customer purchases the elastic support, SBBroneske offers an engineering service (free of charge).

SB Broneske suggests the following work flow:

[1] Drawings: Customer sends the drawing of theexhaust pipe system to SB Broneske with or withoutpositions of vibration mounts, expansion bellows, pipepenetrations or rain caps.

[2] Technical Offer: SB Broneske creates the technicaloffer (layout proposal how to arrange the products inthe exhaust pipe system, vibration analysis).

[3] Commercial Offer: SB Broneske draws up acommercial offer and sends this offer to the customer.

[4] Revisions: Customer sends request for revisions. SBBroneske sends revised offers (up to 15 revisionspossible).

[5] Order of Products: Customer approves the technicaloffer and orders the products.

[6] Production of products: SB Broneske receives orderand immediately plans production/saves productiontime.

[7] Order Confirmation: SB Broneske sends the orderconfirmation within three to six works days.

[8.1] Production of project package: SB Broneskeproduces the products project based. Time of dispatchconfirmed in order confirmation.

[8.2] Spare parts: Spare parts or smaller quantities areavailable from stock on three continents America, Asia,and Europe).

How to read the Technical Offer?


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SB Broneske engineers create the layout proposal inthe drawings of the exhaust pipe system. Theexperience of SB Broneske, SB Broneske performs thisbusiness since 1972, helps to create this layout proposalvery effectively.

SB Broneske has developed a very complex data baseto standardise the required calculations. SB Broneskegenerates the technical offer with the database.

The technical offer of SB Broneske consists of thefollowing chapters:

(A) Cover, Index, Remarks, Revisions

(B) Vibration Analysis, Calculations, Vibration Diagrams

(C) Layout Proposal (Drawings)

(D) Design Office Check List, Product Data Sheets

The database system supports the engineers toperform the vibration analysis and the calculation forthe structure borne noise reduction.

Calculations Technical Offer 1: Vibration Calculation


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Laying out the exhaust pipe system: In order tocorrectly lay out the exhaust pipe, various levels ofvibration have to be calculated and attuned to eachother.

Only with the help of theses calculations is it possible toattune the vibrations to each other.

With the help of the technical offer, SB Broneske canprove that these calculations were made (please, seepicture chapter 2.9):

[1] Product type, quantity, flexible holder: SB Broneskesuggests (chooses) the product size based on weightper pipe section.

[2] Weight of pipe section, direction of pipe section: SBBroneske calculates the pipe section weight.

[3] Load per mount, deflection: SB Broneske calculatesdeflection of vibration mount.

[4] Natural frequency mount: SB Broneske calculatesthe natural frequency of the vibration mount as a resultof the deflection.

[5] Exhaust frequency: This is a result of the engine data

[6] Pipe and propeller frequency: SB Broneskecompares also propeller frequency and pipe frequencyif required.

[7] Vibration isolation and structure-borne noisereduction: This reduction bases on the correlation ofnatural frequency of the mount and exhaust frequency.

Calculations Technical Offer 2: Vibration Calculaton Example


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Contents


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3.1 Fix points

3.2 Anchorage points

3.3 Sliding points

Contents


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3.1.0 Vibration mounts: Fix Points

3.1.1 Vibration mounts: Fix Points (Compression Mount)

3.1.2 Experimental test series: Temperature curvevibration mounts

3.1.3 Fix points arrangement

3.1.4 Brackets for Compression Mounts

3.1.5 Installation of Compression Mount or TensionCompression Mount

3.1.6 Tension Compression Fix Point Mount

Vibration mounts: Fix Points


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The SB Broneske fix points were developed andpatented in 1972. These products have been producedand installed more than one Million times.

The fix point fixes a pipe section and holds this pipesection in place.

SB Broneske produces the vibration mounts fix pointswith a highly effective silicone (elastomer). The SBBroneske vibration mounts are very effective reducingvibrations and structure-borne noise.

The SB Broneske fix points are tear-proof, fireproof andthey have an internal anti-break-away device.

Vibration mounts: Fix Points (Compression Mount)


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Diagonal load: If there is diagonal load on the fix point, itcan absorb about twice the vertical compressive force.Dynamic load: The dynamic load amounts to about threeor four times static load. If the load is greater, the anti-break-away device in the vibration mount triggerscausing a steel-steel connection. The SB Broneske fixpoints are pre-mounted on a welding plate to makeinstallation easier.

SB Broneske produces the fix point in four standardsizes:

SBB82001 load max. 200 kgSBB82002 load max. 400 kgSBB82003 load max. 750 kgSBB82004 load max. 1500kg

The fix point consists of the following: The fix pointconsists of the following main components:

[1] Cap[2] Foot[3] Welding Plate with screws[4] Integrated anti-break-away device

Experimental test series: Temperature curve vibration mounts


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Broneske vibration mounts fix points are speciallydesigned for the exhaust pipe system of ships(maritime environment). The SB Broneske elastomer ofthe fix point is heat resistant up to 300°Celsius (572°Fahrenheit).

In a series of tests in the late 1980s, SB Broneskleinvestigated the temperature at the vibration mount. SBBroneske displays the result of the experimental seriesin the attached temperature curve. If the exhaust pipetemperature is 500°Celsius, the temperature at theinsulation (100mm) is not higher than 140°Celsius. Thetemperature at the bracket (vibration mount) is lowerthan 100°Celsius.

Fix points arrangement


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The SB Broneske fix points should be installed at a 180°angle at the pipes or in a radial arrangement.Please, avoid a 90° arrangement situation.

If the fix points are installed at a 90° situation, torqueand forces of the exhaust pipe must be recalculated andapproved by engineers.

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Brackets for Compression Mounts


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Please, choose the thickness of the brackets with theweight of the pipe section! Brackets must berecalculated by the shipyard’s design office.

Installation of Compression Mount or Tension Compression Mount


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In some cases, a fix point should be installed in atension situation (narrow casing, pipe closer to theceiling than to the floor).

SB Broneske produces fix points for tensioninstallations - the SB8308x series.

Please, ask the SB Broneske engineering team toconsider this design requirement during creation of thetechnical offer!

Tension Compression Fix Point Mount


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The SB Broneske tension compression fix points arespecially designed for marine applications. They areshear-proof.

The tension compression fix point fixes a pipe sectionand holds this pipe section in place.

SB Broneske produces these fix points with a higheffective silicone (elastomer). These mounts are veryeffective in reducing vibrations and structure bornenoise.

SB Broneske produces the fix point in four standardsizes:

SBB83081 load max. 200 kgSBB83082 load max. 400 kgSBB83083 load max. 800 kgSBB83084 load max. 1600kg

The fix point consists of the following main components:

[1] Body and foot[2] Disc[3] Welding plate with screws

Contents


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3.2.0 Anchorage Point: Tension/Compression Mount

3.2.1 Arrangement with two or three anchorages

3.2.2 Angle between deck, vibration mount and pipe

3.2.3 Maximum rotational deflection

3.2.4 Threaded rod: Length in vertical pipe section

3.2.5 Lashes/Pad eye brackets

3.2.6 Alignment of pad eye brackets

3.2.7 Alignment of angle steel

3.2.8 False direction of anchorage point in vertical pipe

3.2.9 Doupling

Anchorage Point: Tension/Compression Mount


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The SB Broneske anchorage points are tensioncompression mounts and are specially designed formarine applications.

These fix points were developed in the 1970s. Theseproducts have been produced and installed more than1,000.000 times.

The tension compression vibration mount foranchorages/sway braces are designed to keep theresilient supported exhaust pipe system from tilting andto keep the lateral movement of the expansion bellowswithin restricted limits.

The anchorage points stabilize the pipe sections. Also,the anchorage points compensate heat expansion.

Turnbuckle with right and left hand threaded boltsmake precise adjustments possible.

SB Broneske produces the anchorage point in fivestandard sizes:

SBB61000 load max. 200 kgSBB61001 load max. 400 kgSBB61002 load max. 750 kgSBB61003 load max. 1500 kgSBB61005 load max. 5000 kg

The anchorage point consists of the followingcomponents:

[1] Vibration mount body (elastomer protected)[2] Threaded rod[3] Turnbuckle[4] Fork crown

Arrangement with two or three anchorages


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Two Anchorages

The anchorages must be optimally assembled at anangle of 90°. When assembling at 90°, the forces on thetwo anchorages is the most optimal.

It is also possible to assemble the anchorages at anangle of between 70° and 110°.

Please avoid assembling the anchorages at an angle ofless than 70° or more than 110° because the exhaustpipe is then no longer held in an optimal lateral position

Three Anchorages

The anchorages must be optimally assembled at anangle of 120°. When assembling at 120°, the forces onthe two anchorages is the most optimal.

It is also possible to assemble the anchorages at anangle of between 100° and 140°.

Please avoid assembling the anchorages at an angle ofless than 100° or more than 140° because the exhaustpipe is then no longer held in an optimal lateral position

Angle between deck, vibration mount and pipe


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In general, the angle between SB Broneske anchoragepoint, the deck and the pipe should be 90°:

In general, in the horizontal pipe section, the anchoragepoint should be installed in vertical direction.

In general, in the vertical pipe section, the anchoragepoint should be installed in horizontal direction.

ATTENTION: SB Broneske indicates the exact directionof the anchroage points in the layout proposal.

If design office or production department has anyquestions about the direction of the anchorage points,please contact SB Broneske office to clearify details.

Maximum rotational deflection


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SB Broneske anchorages (tension compressionmounts/sway braces) must not be deflected more than12°.

The deflection is a result of the heat expansion of thepipe section and the distance from the fix point to theanchorage point and the length of the threaded rod.

Please install the anchorages under consideration ofthe maximum deflection.

Do not shorten the threaded rod if heat expansion willexceed the maximum rotational deflection.

Threaded rod: Length in vertical pipe section


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SB Broneske anchorages (tension compressionmounts/sway braces) must not be deflected more than12°.

The deflection is a result of the heat expansion of thepipe section and the distance from the fix point to theanchorage point and the length of the threaded rod.

Picture 1: The minimum length from fork crown tovibration mount is:

L1=700mmL2=500mmL3=300mm

Please install the anchorages under consideration ofthe maximum deflection.

Picture 2: We strongly suggest using anchorage pointswith two fork crowns, if the distance from the fix point ismore than 10 meters.

Lashes/Pad eye brackets


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Strength of lashes to be recalculated with the specificdesign situation.

Alignment of pad eye brackets


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Pad eye brackets

When installing or assembling the pad eye brackets ofthe anchorages, please make sure that the pad eyebrackets are installed or aligned long the heatexpansion.

Please choose the direction so that a free expansion ofthe exhaust pipe towards the heat expansion ispossible.

The pad eye brackets may by no means be assembledperpendicular to the direction of expansion.

Alignment of angle steel


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Angle steel

When installing or assembling the angle steel of theanchorages make sure that the angle steel is welded tothe frame correctly. Weld the two sides of the angle:

[1] Weld the complete lower edge to the angle steel tothe frame.

[2] Weld each end of the frame to the frame orbulkhead/deck.

False direction of anchorage point in vertical pipe section


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Never anrrange the anchorage points like this on boardof a ship. This configuration might cause criticaldamange to the pipe or the ship.

Doupling


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Strength of doupling to be recalculated with the specificdesign situation.

Contents


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3.3.1 Basics

3.3.2 Bushes

3.3.3 Oblonghole in Bracket

Basics


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Some exhaust pipe constructions need sliding points tobe installed. There are always fix points in a pipesection. A sliding point is always installed close to a fixpoint on the same level. This is usually the case if theexhaust pipe is lead into a 90° bend (horizontal pipesection to a vertical pipe section) and has to take on theweight of the exhaust pipe.

A slip joint is a fix point in that allows the bracket to“move” or “sliding” on a fix point in one direction. Forthis purpose, a oblone hole is made in the bracket and abush is installed that allows for the “moving” or“sliding”.

When assembling or installing the slip joint, it must beensured that the direction of the oblong hole has beencorrectly calculated. If the direction is wrong, then themiddle bolt in the vibration mount will break.

Bushes


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The bushes for the sliding point are 0.3mm higher thanthe bracket is high. A washer should be assembled onthe bracket.

The outer diameter of the bushes is the same as that ofthe oblong hole.

Washer to be used.

SB Broneske can supply the bushes and washers onrequest (length of bush depends on how thick thebracket is).

Example shows bushing for vibration mount SB82003(center bolt SB82003 diameter 16mm) and bracketthickness 12mm.

Oblonghole in Bracket


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The oblong hole should be in exactly the same directionas the direction of heat expansion. The exhaust pipeexpands from the fix point of each exhaust pipe sectionin all linear directions.

For this reason, it is easy to determine the direction ofthe oblong hole: It is parallel to the direction ofexpansion.

It is possible to install the oblong hole at the same levelas the fix point because the slip joint solution onlyallows for expansion parallel to the bracket.

The picture on the left demonstrates an example for theconstruction of an oblong hole.

Table: Comparison of rain caps


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Why are SB Broneske rain caps so effective.?

SB Broneske has developed all rain caps under theaspect of reducing structure-borne noise.

The SB Broneske rain cap transfers none or very littlestructure-borne noise! Such little structure-borne noiseif transferred because the silicone cushions reduce thetransfer of structure-borne noise to a minimum.

SB Broneske supplies all rain caps pre-mounted.

Contents


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4.1 Protecting the products from damp

4.2 Storage

4.3 Transport

Protecting the products from moisture


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The products must be protected from rain, water andmoisture. Furthermore, the products must be protectedfrom oil, soot, chemicals, earth and sand.

The products should be stored on a level, firm, water-proof and dry surface. The products should be storedunder a rain-proof roof or similar rain-proof cover.

The products should be protected from high humidity ordamp in combination with high temperatures exceeding25°C.

The products should not be stored for more than sixmonths. The products should be assembled within sixmonths.

The must also be protected from damp at theconstruction site.

The products should be protected from damp or waterby using a suitable varnish at the place of installation.Products that are installed outside should comprisespecial, rust-proof material (such as stainless steel orgalvanised steel) or be painted with an anti-corrosivepaint on a regular basis.

Storage


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Date: 29.09.2011

Attention thread: Please take utmost caution whenstoring the vibration mounts and their components.These products are product groups that comprisethread among others.

These threads can be malformed by slight mechanicalload. Improper load on the thread can damage ordestroy the thread:

[1] The products may not be stacked in an improperway.

[2] The products may not be walked on or loaded.

[3] The products may not be stood on.

[4] The products should not be stored for longer than sixmonths.

[5] The products should be assembled at theconstruction site within six months.

Transport


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Date: 29.09.2011

Attention thread rod: Take utmost caution whentransporting the vibration mount. These products areproduct groups that comprise thread among others.

These threads can be malformed by slight mechanicalload. Improper load on the thread can damage ordestroy the thread:

[1] The products may not be stacked in an improperway.

[2] The products may not be walked on or loaded.

[3] The products may not be stood on.

[4] The products should not be stored for longer than sixmonths.

[5] The products should be assembled at theconstruction site within six months.

Contents


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Date: 29.09.2011

5.1 Lifetime span of a vibration mount

5.2 Prior to assembly: Elastic mount

5.3 Prior to assembly: Inspection of piping

5.4 Assembly 1

5.5 Assembly 2

5.6 Protecting the vibration mount during assembly

5.7 Insulating the vibration mount

Lifetime of a Vibration Mount


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Date: 29.09.2011

A vibration mount has a lifetime span of approx. 15 to 20years.

The lifetime span of the vibration mount is usuallylimited by the lifetime span of the elastomer in thevibration mount.

The vibration mount should be replaced after thisperiod.

The pre-condition for the vibration mount to reach thislifetime span is that it is not overloaded.

If the guidelines in this handbook are not adhered to,then the lifetime span of the vibration mount can bereduced considerably.

A reduction in the lifetime span of the vibration mountcan have direct effects on the exhaust pipe system andlead to damage or impairment to the functionality of theexhaust pipe system.

Before assembling: Elastic Support


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Date: 29.09.2011

The exhaust pipe system is a system which, due to thehigh temperature of the exhaust gas, heats andexpands due to heat (thermal expansion).

Additionally, the exhaust pipe of the engine causesvibrations and structure borne noise. The exhaust pipesystem transports the engine and exhaust gas noiseinto the ship's structure.

To compensate the , vibrationmounts and expansion bellows from SB Broneske mustbe installed.

To reduce the ,vibration mounts from company SB Broneske must beinstalled.

Before the assembly of the vibration mount, it has to beexamined whether the following calculations have beencarried out:

[1] The piping system must be supported by a resilientsupport system (fix points, anchorage points (swaybraces), elastic pipe penetrations and expansionbellows). The arrangement of the elastic support mustbe created by specially trained engineers. SB Broneskeprovides free calculations (layout proposal). SBBroneske recommends that customers use this freeservice.

[2] The elastic support must be designed and calculatedby taking into consideration the wheights of the pipe,acceleration forces of the exhaust gases, reactionforces of vibration mounts and expansion bellows.

Before assembling, examine the following of the vibration mount:


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Date: 29.09.2011

1] Check whether the products were damaged duringtransport or storage. In the case of any damage, theproducts must not be installed. Please report any dents,signs of rust on the steel, bent or damaged componentsto the manufacturer.

[2] The pipe with the elastic support must have beeninstalled before the expansion bellows are assembled.

[3] The construction inspection must approve the elasticsupport, the frames of the elastic support, the doublingand brackets and the piping system before the vibrationmounts are assembled.

[4] The brackets and lashes and doublings of thevibration mounts have to be assembled and welded tothe construction before the vibration mounts areassembled. This work must be performed byprofessional welders and supervised by weldingengineers.

ASSEMBLY 1


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Date: 29.09.2011

The assembly of the vibration mounts can be, forexample, performed in the following steps:

[1] Doublings, lashes and brackets are already installed(welded) to the structure, frames and pipe system.

[2] The frames/base for the vibration mounts arealready installed (welded) to the deck/bulkhead.

[3] Should sliding points be used, the installation is to beprepared and carried out according to the chapter“Sliding point”.

[4] The pipes should be installed in sections. Eachsection of pipe should be held by one pair of fix pointsand one or several pairs of anchorage points inaccordance with the construction drawing.

[5] Each pipe section: First of all install the pair of fixpoints and then the anchorage points.

[6] Each section of pipe should be prepared in anassembly hall, for example. The brackets, doublingsand pad eye brackets have to be welded to therespective pipe section in accordance with theconstruction drawing. This work must be supervised bytrained welders and welding engineers.

[7] The respective base plates of the fix points should beassembled in the ship in the machine room and exhauststack.

ASSEMBLY 2


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Date: 29.09.2011

[8] Fix points: There are various methods of assemblingfix points. SB Broneske recommends first screwing thefix point to the bracket, then the foot of the fix point tothe base plate in the machine room/exhaust stack. Afterthat, the welding plate of the fix point should be weldedto the base plate.

[9] Anchorages: There are various methods ofassembling anchorages. SB Broneske recommendsfirst welding the doublings and butt straps to the pipeand the bulkhead and the screwing on the anchorages.

[10] The vibration mounts must not be exposed torotation or torque forces during assembly.

[11] The pipe section can be stabilized during assemblyby using straps and cranes.

[12] Expansion bellows to be installed after theinstallation of the pipe sections and the vibrationmounts on board of the vessel. If the expansion bellowsare installed together with the pipe sections, theexpansion bellows might be damaged.

Protection of the elastic support during assembling


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Date: 29.09.2011

The vibration mounts are very sensitive and have to beparticularly protected for example:

[1] The vibration mounts are to be protected fromwelding spatter.

[2] The vibration mounts may not be stepped on.

[3] During and after assembly, the threaded rod of theanchorage points may not be touched by assembly toolsor hosting equipment.

[4] The thread rod of the vibration mounts may not bestepped in any case.

[5] When bolting, screwing or welding of the vibrationmounts, please ensure that the vibration mounts arenot damaged.

[6] Do not use oil or chemicals near the vibrationmounts.

Insulation of vibration mount


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Date: 29.09.2011

The exhaust gas pipe must be insulated, because thepipe may get very hot (500°Celsius or more).

The temperature at the outside of the insulation is lessthan 150°Celsius.

Vibration mounts or pipe penetrations must NOT beinside the insulation.

Contents


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Date: 29.09.2011

6.1 Prior to the commissioning and sea trail

6.2 During commissioning and sea trail

Prior to the commissioning and sea trail


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Date: 29.09.2011

The inspection must check the exhaust pipe system andvibration mounts before commissioning and sea trail.

Please check before commissioning and sea trail:

[1] Have the vibration mounts been damaged duringinstallation or transportation?

[2] Has the whole elastic support been installedaccording to the requirements and design templates?

[3] Have the specific vibration mounts been installed inthe "correct" position in the pipe system?

[4] Are the vibration mounts and their moving parts freefrom other bodies?

[5] Have all vibration mounts assembled in the correctway?

[6] Have all pad eye brackes and lashes installed in thecorrect direction?

[7] Had the threaed rod of the anchorage points shortentoo much (Maximum rotational deflection = 12°)?

[6] Are all pipes in the correct position?

During commissioning and sea trail


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Date: 29.09.2011

During commissioning and sea trail the vibrationmounts must be inspected by means of a visualexamination:

[1] Leakage or pressure on the respective pipe sections,vibration mounts or expansion bellows.

[2] Prohibited movements and improper rotation ortorsion of the vibration mounts and its components.

[3] Prohibited movements of the exhaust pipe system.

[4] Dents or instability of the pipe sections, vibrationmounts or expansion bellows.

General Notes


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Date: 29.09.2011

One of SB Broneske designed and properly buildvibration mount requires no special maintenance.However, the vibration mount, together with the pipingsystem, is to be monitored on a regular basis.

A regular inspection / maintenance once a weekincreases the life time of the vibration mount in theexisting pipe system.

It must be verified whether the vibration mount revealssigns or bolts become loose.

Contents


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Date: 29.09.2011

8.1 Damage caused by transportation, handling orinstallation



Damage caused by transportation, handling or installation


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Date: 29.09.2011

SB Broneske draws the customer’s attention to themost frequent causes of failure of vibration mounts.

Causes of failure:

[A] Installation: Pad eye brackets/lashes are installed inthe incorrect direction: The lashes do not move freely inthe direction of heat expension and could break.

[B] Installation: The threads have been cut off too short.The maximum angle of the thread rod allowed of 12° onthe anchorage was exceeded and the vibration mountdamaged.



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Date: 29.09.2011


[C] Installation: The angle steel of the vibration mountwas installed incorrect. The angle steel should haveturnd 90° to create more stability!

[D] Installation: Compression mount was installed upside down. The picture show a compression fix pointthat is installed in a tension situation. Please, see nextpage for details.



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Date: 29.09.2011


[E] Installation: The directon of the force on acomression mounts creates a tension situation. Thiswrong installation does not create a situation that thebreaks. But it creates a situation where no rubber .

Installation like shown in picture (1) and (2) is notcorrect, installaiton like in (3) is correct.



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Date: 29.09.2011

[F] Installation: The silicone cushions of the rain capwere assembled directly to the exhaust pipe. Siliconecushions NOT to be mounted to the exhaust pipe.

[G] Installation: The vibration mounts or bulkhead pipefitting were installed inside the insulation. Elastomercomponents (Silikone, rubber) of vibration mounts orpenetrations may melt.

Exclusion from the warranty


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Date: 29.09.2011

We would like to point out that the warranty is void if thepreceding instructions for assembly, verification ofassembly and commissioning are not adhered to.