gangway & gangway tower 登船梯 -...

Gangway & Gangway Tower

登船梯

上海冠卓企业发展有限公司Shanghai Eminent Enterprise Development Co., Ltd

Tel：+86 13905134168Fax：+86 21-57941569

E-mail: [email protected]

Http://www.. china-eminent.com

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上海冠卓企业发展有限公司Shanghai Eminent Enterprise Development Co.,Ltd

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CATALOGUE

1. GENERAL INTRODUCTION..................................................................................................... 1

2. TYPE AND SPECIFICATION..................................................................................................2

3．CODES AND SPECIFICATIONS............................................................................................ 4

4. DATA SHEET............................................................................................................................5

5. MATERIAL....................................................................................................................................7

6. GANGWAY TOWER COMPONENTS................................................................................... 7

6.1 General Description......................................................................................................... 7

6.2 Support Tower / Column..................................................................................................8

7. EMERGENCY RELEASE CONTROL SYSTEM FOR THE GANGWAY.............................11

8. SURFACE PREPARATION AND PAINTING..........................................................................12

9. WARRANTY OF GANGWAY TOWERS..................................................................................13


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1. GENERAL INTRODUCTION

Gangway & Gangway Tower is a device foroperators of working at site and crews to passthrough board and off-board safely in theprocess of liquid and gas tankers mooring atlarge modern harbor. It is insteadof traditionalboarding device.

During the development of the oil tankerharbor, the modern dock for heavy oil tankerentering, especially the dock sets up withisolated mound, its surface aren’t continuousand its elevation is higher than normal one.The oil tanker has serious jouncing, floating inhigher frequency and its scope is very bigduring the oil tanker is moored. The problem is hard to be solved easily by the tanker’sown ladder because the distance between oil tanker and the edge of dock. To speed upthe loading and unloading process and to ensure the safety of the loaders and crews, itis natural for the modern large oil tanker to replace own ladder with our Gangway Tower.Just like Loading Arm, Gangway Tower becomes irreplaceable advanced equipmentbeing used more and more harbors.

Although having simple function, GangwayTower needs good technologicalperformance considering its surroundingcircumstance. In order to suit the queasycondition and some unexpected thingsbetween ship and dock, the harbor’shydrology and meteorology and a lot ofdetail information relevant possible berthingships should be analyzed carefully, to decideits suitable working conditions and choosecorrect construction and reliable safeguard.Only alone doing so, we can get theanticipative purpose.

We can custom-made various type Gangway base on the requirement from theclient.

The Gangway & Gangway Tower consists of a standing Tower(column),accommodation ladder and other supplementary constructions. The accommodationladder even has the function of up and down, bending, turning around, and theadjustment of the front ladder.


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Mechanical or hydraulic drive system is usually used as drive system for GangwayTower. Many kinds of safe protector can be set according to client’s requirement inorder to ensure the normal work of transmission mechanism. Explosive-proofelectric-device can also be used base on the flash point of the oil.

2. TYPE AND SPECIFICATION

Mark: EGT – E×“EGT” is the shorted from Eminent Gangway Tower“E×” is the type of EGT according to the different structure.There are four type classified by main structure as E1, E2, E3 and E4.

According to the dock tonnage (DWT), the Max data of the tide change in many years,height above the sea level of the dock surface and the investment and itsperformance, a suitable Gangway Tower can be chosen. The user has to fill in theparameter form and hand it to the manufacturer to confirm the scope, basic size andloading data of the Gangway Tower.

For example:EGT – E1 consists of a main ladder, a triangle ladder and a frame. It is suitable for3,000-30,000 ton Jetty.EGT – E2 consists of a main ladder, a front ladder, a triangle ladder, a revolving flatroof and a column. It is suitable for 5,000-50,000 ton Jetty

EGT – E3 consists of a main ladder, a front ladder, a triangle ladder, a revolving flatroof, a draught machine and a column. It is suitable for 10,000-80,000 ton Jetty.

EGT – E4 consists of a main ladder, a front ladder, a triangle ladder, a revolving flatroof, a lifting machine and a tower. The revolving flat roof can be moved up or downalong the tower. It is suitable for 20,000-300,000 tonJetty.

E1 type E2 type


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E3 type E4 type

3．CODES AND SPECIFICATIONS

All design, fabrication, and installation shall be done in accordance with theequirementsstated in Project Specification from clients, Design Criteria for Marine Facilities, and allcodes and specifications referred to therein.

Gangways shall be designed, fabricated, tested and installed in accordance with themostrecent editions of the following codes and standards or equivalent related standards:

American Institute of Steel Construction, AISCManual of Steel Construction

American National Standards Institute, ANSIH35.1 Alloy and Temper Designation Systems for Aluminum or equivalentstandardsAmerican Society of Testing MaterialsASTM A36 Structural SteelASTM A252 : Standard Specification for Welded and Seamless Pipe PilesASTM A325: High Strength Bolts for Structural Steel JointsASTM A780: Repair of Damaged Hot-Dipped Galvanized Coatings

American Welding Society, AWSAWS D1.1: Structural Welding Code – SteelAWS D1.2 : Structural Welding Code – Aluminum

Society of International Gas Tankers and Terminals Operators, Ltd (SIGTTO)Liquid Gas Fire Hazard Management


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BS 6651 Light protection Code3.0 DESCRIPTION

Q/TMXW2-2004 (Shanghai Enterprise Standards)GB 700 Carbon Structural SteelGB 704 Hot-rolled Flat Steel – Dimensions, Shapes, Weight and TolerancesGB 706 Hot-rolled Flat Steel – Dimensions, Shapes, Weight and TolerancesGB 707 Hot-rolled Channel Steel – Dimensions, Shapes, Weight and

TolerancesGB 709 Hot-rolled Steel Plates and Steel Strips – Dimensions, Shapes,

Weight and TolerancesGB 9445 NDE Personnel QualificationsGB 9787 Hot-rolled Equal-leg Angle Steel – Dimensions, Shape, Weight and

TolerancesGB 9788 Hot-rolled Unequal-leg Angle Steel – Dimensions, Shape, Weight and

TolerancesGB 50205 Code for Acceptance of Construction Quality of Steel StructuresGB/T 699 High Quality Carbon Structural SteelGB/T 1591 High Strength Low Alloy Structural SteelGB/T 2970 Medium and Thicker Steel Plate – Method for Ultrasonic TestingGB/T 2975 Steel and Steel Products – Location and Preparation of Test Pieces

for Mechanical TestingGB/T 3277 Corrugated Plates with Lath and Lentil Form (Checker plate)GB/T 5313 Steel Plate with Through Thickness CharacteristicsGB/T 5780 Hexagon Head (Mild Bolt) – Gr CGB/T 6728 Cold Formed Steel Hollow Sections for General Structure Dimensions,

Shapes, Weight and Permissible DeviationsGB/T 8162 Seamless Steel Pipe for Structural PurposesGB/T 10433 Shear StudsGB/T 11263 The Hot-rolled H and T Section SteelGB/T 17395 Dimensions, Shapes, Masses and Tolerances of Seamless Steel

PipesJB 4730, Section 8: UT Testing of Plate MaterialsYB 3301 Welded H Section SteelsYB/T 4001 Steel GratingAll the standard and criterion used is the newest version so far.

4. DATA SHEET

1. Site Conditions

EnvironmentExtremely High temperature

Extremely Low temperature


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Average temperature

Max wind speed of

working

Wind Importance Factor:

i=1.15

Max design wind speed 55m/s

Seismic Loads 7 Site Class

Relative humidity Moisture and marine

exposure (salt sprays)

2. Tide Parameter

Mean High Water Springs

Mean High Water Neaps

Mean Sea Level

Mean Low Water Springs

Mean Low Water Neaps

Lowest Astronomical Tide

3. Jetty Parameter

·Design Vessel Type DWT

Height of the dock

Height of template of Tower installed

The distance between edge of dock

and center of tower

The thickness of the rubber fender

Transverse (Perpendicular to Deck)

·Longitudinal (Parallel to Deck)

Power

4. Gangway Tower Parameter

Design Vessel Type

Type of Gangway

Size of Shipping

Height of Gangway Tower

Size of Gangway

Width of Gangway 800mm

Going Down Speed 3.5m/min

Uplifting Speed 3.5m/min


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Rotating Speed 0.27r/min

Design Load 600kg

Estimated Total Gangway Weight T

Explode-proof class

Controlling mode El-Hydraulic

Service Class M4

Max Design wind-speed

（above lowest water level 10meter

3seconds）

Resetting status 55m/s

Working status ＜20m/s

Noise (As Defined by IEEE-85) Maximum sound pressure level=85dB (A) 1-meter

5. MATERIAL

PART STANDARD REMARK

Tower (Column) with stairs GB-Q235 Equal to ASTM ASTM A283

GB-Q345B Equal to ASTM A572 Gr.50

Gangway(Main Ladder, Front

ladder and Bulwark Ladder)

Al. Alloy LF5

Shaft GB-40Cr Equal to ASTM A29 5140

Hydraulic Cylinders SS chrome plated

cast

Tubing and Fittings 316SS

Platform ang platform hand

railing

Aluminum Alloy

Anchor Bolts and Template Q345 Equal to ASTM A572 Gr.50

6. GANGWAY TOWER COMPONENTS

6.1 General Description

The beforehand embedding components of the Gangway Tower and their

shape & size should meet the design requirement for the dock.

The whole structure should have the function of lightening proof. The


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Gangway Tower should not have any mechanical interference with other

equipment at the dock.

All the machines of Gangway Tower should be safe and work smoothly, and their

vibration and noise while working should accord with the related requirement,

and cannot influence their normal function.

The manufacturer promise its products have complete function, advanced

technology and meet the need of safeguarding life.

All the equipment should be designed and manufactured accurately, they can

work safely and continuously under all circumstances without any problem such

as excess stress, vibration, temperature ascending, abrasion, eroding and aging.

The manufacturer should do its best to provide with more advanced,

well-rounded and reliable equipment than those described in this book.

The advanced and reliable technology should be adopted to manufacture the

spare parts that should have good geometric form in their surface and suitable

tolerance.

6.2 Support Tower / Column

The gangway tower shall consist of a steel

structure with vertical load bearing guide bars.

The tower shall include stairways, platforms,

handrails, and anti-slip stairs. Safety chain

handrails and mid-rails, with snap hooks, shall be

provided to cover all gaps in handrails when the

gangway is at various positions.

Standard structural steel shapes conforming to the requirements of Project

Specification FABRICATION OF STRUCTURAL STEEL IN THE PEOPLE’S

REPUBLIC OF CHINA shall be used.

The gangway tower can also include an integral and elevated firewater monitor

structure(Optional ), complete with access ladders and platforms for access to the

control cabin and firewater monitor. Firewater piping shall comply with project


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specification Normally, firewater piping shall be painted red(if any).

The gangway tower structure can also be

designed for installation of a hydraulic

crane(Optional) with a clear passage width stairs

from the gangway platform to and from the deck

of the ship.

This support structure shall have a mechanical

device to secure the gangway in its stowed

position and shall be capable of safely supporting

and restraining the gangway under the worst

design case environmental conditions. In this

position, the gangway shall be folded to clear inshore of the fender line.

The gangway tower shall be electrically isolated from the jetty loading platform

except that the gangway tower shall be provided with one or more earthing lugs for

connection to the facility's earthing system.

6.3 Gangway

The gangway shall be provided with a steel

turntable platform, connected to the steel

tower at a fixed level, which shall provide a

range of horizontal turning angle. The control

of movement shall be via a hydraulic power

unit.

The assembly shall be designed to allow for

a longitudinal drift of the tanker to a maximum

of ±3.0m (±11.5 ft.). Alarm positions of the

gangway will be interlocked with

those for the loading arms, and will be

signaled by an audible alarm furnished with

the loading arms.


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The design shall incorporate two hydraulic cylinders, each one capable of

supporting the entire gangway load. The hydraulic systems shall be powered by

an electric motor. The hydraulic system shall incorporate needle valves so that

leakage cannot result in a rapid pressure drop. Failure of the hydraulic system

shall trigger an audible and visual alarm at the local control panel and also in the

Marine Terminal Building.

A hand pump shall be provided so that the gangway may be lifted clear of the

tanker in case of hydraulic motor failure.

The locking devices for the gangway in its stored position shall be manually

operated and easily visible to the operator.

A ladder with Aluminium step, consisting of a fixed part and foldable part, shall

also be provided. The end of the telescopic part shall be equipped with a bulwark

ladder for easy access to the tanker’s deck.

Ensure that the gangway design has proper access for all maintenance and

adequate clearance (including all slewing and luffing positions) from any other

structure or equipment on the jetty loading platform deck.

Hydraulic System is consist of normal working system and standby urgency

Failure of the hydraulic system shall trigger an audible and visual alarm at the

local control panel and also in the Marine Terminal Building.

6.4 Electrical and Instrumentation

The system is consist of Control cabinet, PLC,

Junction box, Alarm system, wireless Remote Control,

Tower lighting and Cable etc.

All equipment and material shall be suitable for

operation in the climatic conditions specified on the

Project Specification for Project Design Basis

Enclosures shall be IEC 60079 AISI 316 stainless steel

and shall be corrosion resistant to a salt-bearing, marine atmosphere.


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Supply all power materials (cable, tray, supports, etc.) up to a junction box,

required to ensure a complete and operable system.

The junction box with a cable gland shall be installed

at the bottom of the gangway tower. Power to the

junction box will be by others.

Supply all required lighting, including switches,

fixtures, and lamps, required to ensure a complete

and operable system. The lighting circuit shall be

connected to a junction box located at the bottom of

the Gangway or Fire Monitor Tower(if any). Power to

the junction box is not included in the scope of supply

for the gangway or fire monitor tower.

All electric/electronic equipment, instrumentation, and devices shall be

tropicalized and shall be suitable for the hazardous

All instrumentation systems shall be non-incendive.

Supply all power materials (cable, tray, supports, etc.) up to a junction box,

required to ensure

a complete and operable system. The junction box with a cable gland shall be

installed at the bottom of the gangway tower. Junction boxes shall be rated for

IEC applications and the enclosure type shall be IP-55 (minimum). Power to the

junction box will be by others.

Supply all required lighting, including switches, fixtures, and lamps, required to

ensure acomplete and operable system. The lighting circuit shall be connected to

a junction box located at the bottom of the gangway tower. Power to the junction

box is not included in the scope of supply for the gangway tower.

PLC Electric control System: The most important part for PLC Electric control

System is type of S7-224 programmable Controller made in Simenzi located

German. The data display is type TD400C text display made in Simenzi company


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located German

7. EMERGENCY RELEASE CONTROL SYSTEM FOR THE GANGWAY

7.1 Design and incorporate an emergency release control system (ERCS) for the

gangway in order to prevent damage of the bulwark ladder (at the ship), or of the

complete gangway itself, when the tanker/boat on which the gangway is deployed,

leaves the jetty on a very short notice due to an emergency situation or when the

tanker/boat moves (or drifts) approximately ±3.0 m (±11.5 ft.) away from its

moorings. The allowable Fore/Aft surge movement is approximately +4.5 m. The

ERCS signal for the gangway shall be activated by the emergency release signals

from the product loading arms. The emergency situation for the gangway shall be

indicated on the gangway's control panel and on the control console in the Marine

Terminal Building by means of an emergency signal.

7.2 The ERCS shall only be activated when the gangway’s control box receives the

emergency signal from the product loading arms, when the deck ladder is positioned

on the tanker, and when the hydraulic system is in the automatic (free-wheel) position.

When the ERCS has been activated, the following actions shall be initiated:

Slewing movement of the gangway shall be blocked.

Sliding movement of the gangway shall remain

unaffected.

Discharge of lifting cylinders shall be blocked.

Audible and visual alarm shall be activated.

An electric motor, fed from the essential power bus

（out of our supply） that has diesel generator

backup, shall drive the hydraulic pump as long as is required to lift the gangway

high enough from the ship's deck to clear the railing.

Delayed retraction after alarms for sufficient time to allow escape of personnel

from Gangway towers.

And a manual activation of the ERCS shall also be provided.


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8. SURFACE PREPARATION AND PAINTING

Brand : International(Akzo Nobel) or decided by owner

Color : Yellow or decided by owner

◆ Sandblasting to SA2.5

◆ Primer: High-solids two-component polyamide-cured surface-tolerant epoxy

primer, dry film thinckness 125micro

◆ Intermediate Coat: High-build two-component polyamide-cured micaceous iron

oxide (MIO)-pigmented epoxy, dry film thinckness 125micro

◆ Top-coat : Two-component aliphatic polyurethane high gloss enamel, dry film

thinckness 50micro

Total dry film thickness min 300micro.

9. WARRANTY OF GANGWAY TOWERS

All equipment, materials and services provided shall be new and of the most

suitable grade of their respective kinds for the intended uses. Warranties shall

apply for 24 months from first going into commercial service. Final acceptance

shall terminate such warranties except with regard to latent defects, fraud, or such

gross mistakes as the amount to fraud. All corrective actions taken as a result of

defects in design, equipment or materials shall be subject to the same warranties

for a period of eighteen (18) months following acceptance of the corrected work.

Defected Correction Period for such corrective work shall be extended for an

additional eighteen (18) months from the date of completion of such Corrective

Work

We will send 2 supervisors (engineering) for installation and Commissioning on

site

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