Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

1

TOPICS COVERED

1
...
DEFINITIONS/ TERMS
3
...
API 2C DESIGN
REQUIREMENTS
5
...


Major Components

Revolving Upperstructure

Floating Harness / Bridle
Jib
Mast / A-frame
Auxiliary
Hook Block

Winches
Cab
Boom

Main Hook Block
Boom Heel Pin
Slew Gear
Assembly

Pedestal Adaptor
Pedestal

Base/Pedestal

BASIC CRANE OPERATIONS:
•

Hoisting:The process of lifting
the loads
...
(Also called
Derricking OR Boom hoisting)
...
(Also called
Swing)
...
C Engines
 ISO 3046 / 1- 4 :2002
Allowable Stress Design
 AISC
Handrails, Cat-ladders, walkway design
 OSHA
Slew Gear Design
 AGMA
 NEC
 API RP 2A

Lattice Boom Components
Boom Chord

Boom Splice

Jib
Boom Lacing
(Truss) Boom Tip Sheave
Assembly
MOC: ASTM A36 or A-500 Gr
...


Boom Rests

Vendor to propose
location and design load

Elevation of boom rests to
facilitate easy
accessibility to boom tip
Boom Rests for maintenance purpose

A-Frame Components
Aviation light
A-Frame sheave assembly
Luff Winch
Boom Bumper

API-2C Check!!!

Types C , D &
E specific!
A-Frame
A-frame: A structural frame extending above the upper
structure to which the boom support ropes are reeved
...


Cavitation
When fluid pressure falls below ambient
pressure bubbles are formed which
implode at high pressure regions and
cause mechanical damage due to
pressure-temp rise
...

access ,windows, fan
Stainless steel loadradius charts
...

 Fuel system consists of fuel supply pump from fuel
storage tank to engine day tank, diesel engine fuel
day tank, necessary valves, filters, instruments etc


Electricals


Diesel engine driven generator (optional) if
there is no power supply from the platform
...


Controls







All motion controls to be
hand operated
...
These also
act in case of loss of
hydraulic control pressure
...


•not intended for the
design, fabrication and
testing of davits and/or
emergency escape devices
...


Crane Ratings




API-2C establishes
ratings for onboard and
off-board lifts
...


Methods of establishing crane ratings
...


API-2C Personnel rated load
To be least of the following
 33% of non-personnel load
 Maximum load based on
load line reeving and wire
rope design factors
...
9A
...
0 times Cv or 4
...

For load hoists ,design factor not less
than 2
...
0
Wire rope end termination shall not
reduce wire rope strength below 80% of
the wire rope nominal breaking load
...


API 2C Design Requirements
Design requirements for Structural components:
Structural components covered by API-2C Specification :
1
...
Boom point sheave assembly
3
...
Floating harness or bridle
5
...
Revolving upper-structure
7
...
Boom foot pin(s)
9
...
Pedestal OR Base
11
...
king post OR center post
13
...

Speed test for mainline, boom luff and swing
...

Overload test (1
...

Anti-two block tests
...

Engine functional tests

Vendor Docs for review













Filled in data sheet for pedestal crane
Filled in data sheet for diesel engine
Load capacity chart
Winch performance data
Power requirement calculation
De-rating calculations / charts for diesel engine
Dynamic coefficient calculation
Write up on operation, controls and safety
Power ratings of hoist system
Dimensional outline drawing of the crane
Pedestal loads and moments
Pedestal mounting details

Vendor Docs for review











General arrangement drawings of the crane
Hydraulic system schematics with details and catalogue
Inside cab view
Electrical details / swivel data (single line diagram,
schematic diagram and lighting arrangement)
Filled in data sheets for instruments
Schematics of engine lubrication, cooling, starting, intake
and exhaust systems
Utility requirements
Material certificates, certificates of bought out components
Inspection / test reports
One-year spare parts list

P&ID
Diesel
Storage
Tank
(Pedestal)

Air-driven Diesel
Transfer Pump



---