ABS Guide for Certification of Lifting Appliances 2016: Focus on machinery Cernusco sul Naviglio, Italy 19 May 2016 Marine & Offshore Meeting 2016
Guide for Certification of Lifting Appliances Lifting Appliance Guide previous edition published 2007 Major updates Expanded scope Subsea lifting Heave compensation Maintenance and service baskets Improve/harmonize technical criteria for all types of cranes Expand materials and fabrication requirements 2
Chapter 1: Scope & Conditions of Certification Class Notations for Lifting Appliances: CRC (Crane and Lifting Appliances Register Certificate) Notation Assigned when an ABS Register of Lifting Appliances is issued for ABS Certified Cranes and Lifting Appliances CGSU (Cargo Gear Self Unloading) Notation Assigned when an ABS Register of Cargo Gear for Great Lakes Vessels is issued for ABS Certified Self Unloading Cargo Gear SElev (Shipboard Elevator) Notation Assigned when an ABS Shipboard Elevator Certificate is issued for ABS Certified Shipboard Elevators Chapter 1: Scope & Conditions of Certification 3
CRC notation CRC notation: added abbreviated descriptions, clarifying types of lifting appliances in the Register of LA: SC: Shipboard Crane OC: Offshore Crane HC: Heavy lift Crane SP: Special Purpose MRW: Man Riding Winch Subsea: Subsea Lifting RMP: stern, bow and side port Ramps and Moveable Platforms (decks) Added dedicated notation for personnel lifting with 3 levels: PL: Personnel lifting - Basic emergency recovery system level PL+: Personnel lifting - Intermediate emergency recovery system level PL++: Personnel lifting - Highest emergency recovery system level Example: CRC(SC-PL, OC-PL++-Subsea, HC-Subsea, SP, MRW, RMP) Chapter 1: Scope & Conditions of Certification 4
Chapter 2: Guide for Certification of Cranes Section 2 Structural Requirements updates include: Included of criteria for effects due to vessel inclinations, accelerations and wind pressure Updated structural criteria for uniform approach between all crane types, including allowable stresses and vertical amplification factors Buckling criteria in accordance with ABS Buckling Guide Enhanced requirements for slewing rings Migrated davits, monorail hoists/engine room cranes, provision cranes and union purchase from existing Chapter 3 Section 2 Structural Requirements 5
Chapter 2: Guide for Certification of Cranes Section 2 Structural Requirements 6
Chapter 2: Guide for Certification of Cranes Section 3 Materials and Welding updates include: Provided criteria for specific crane components, e.g. pedestals, sheaves, slewing rings, machinery components, piping systems etc. Clarified that Pedestals and Kingposts are to be constructed from proper ABS grade material up to first bolted connection or crane interface, whichever is closer to the deck New limit for low temperature of machinery componentes of -20 C Updated CVN testing requirements and included a CVN testing summary table for easy reference Included elongation requirements Specified criteria for NDT for welds Section 3 Materials and Welding 7
Chapter 2: Guide for Certification of Cranes Section 3 Materials and Welding 8
Chapter 2: Guide for Certification of Cranes Section 4 Wire Rope updates include: Incorporated safety factors for wire ropes of offshore cranes Included formulas for safety factors for all unit systems Included formulation for reeving efficiency and rope tension Non-steel wire ropes will be subject to special consideration Section 4 Wire Rope 9
Chapter 2: Guide for Certification of Cranes Section 5 Loose Gear, Sheaves, Hooks and Hook Blocks updates include: Loose gear: updated units in tables and included NDE criteria Sheaves: updated pitch diameter and groove radius requirements, included clarification on design as special components Hooks and Hook Blocks Shipboard cranes: acceptance based on loose gear test by Manufacturer Offshore and heavy lift cranes: design review mandatory, survey at test Hook design to standard Material properties of hook material (CVN) Section 5 Loose Gear, Sheaves, Hooks and Hook Blocks 10
Chapter 2: Guide for Certification of Cranes Section 6 Construction Standards for Crane Machinery, Piping and Electrical Systems updates include: Winches and Drums Brakes Slewing Mechanisms and Gearboxes Hydraulic Cylinders Safety Devices and Features Computer-Based Control Systems Section 6 Machinery, Piping and Electrical 11
2-6/19.3 Drums Drum thickness function of pressure applied by subsequent layers of rope Rope relaxation effect for multilayered drum Function of rope stiffness Section 6 Machinery, Piping and Electrical 12
2-6/19.5 Brakes for winches Every hoisting and luffing winch is to be provided with at least a static and a dynamic brake which may act through the same load path STATIC DYNAMIC Section 6 Machinery, Piping and Electrical 13
2-6/19.5 Brakes for winches Static brake Hold a load indefinitely (e.g. oil bath disc brakes) Braking capacity in excess of torque induced by: For hoisting winch 1.5 times Live Load For luffing winch 1.5 x Amplification Factor times Live Load Dynamic brake Retard and stop a moving load without overheating (clamps, band, hydraulic restrictions, regenerative braking) For friction brakes friction factor max value of 0.3 Test to demonstrate fitness To be fail safe (stop the load when loosing actuating power) To be directly connected to the motor ports Closed circuit hydraulic system -> motion regulation is actuated at the pump, need of an additional brake at the motor Section 6 Machinery, Piping and Electrical 14
2-9/7 Brakes for personnel lifting winches Hoisting and luffing winches used for lifting of personnel are to be equipped with at least a static and a dynamic brake, which are to be mechanically and operationally independent Each brake is preferably to act directly on the winch drum but a fully independent load path will be considered on a case by case basis. With separate control circuit Secondary brake rated for personnel Section 6 Machinery, Piping and Electrical 15
2-6/25 Hydraulic cylinders Buckling of cylinders Added formula for critical load (ref. ANSI(NFPA)T3.6.37, Hydraulic fluid power - Cylinders - Method for determining the buckling load), Required safety factor 2 Lock valves Set point of valve at 110% of maximum dynamic operative pressure (calculated with Live Load times Vertical Amplification Factor) Malfunctioning or wrong setting of counterbalance valve may contribute to buckling of cylinders Design pressure of the cylinder to be at least set point of relief valve (dependent on Vertical Amplification Factor) Section 6 Machinery, Piping and Electrical 16
2-9/9 Hydraulic cylinder for personnel lifting Redundancy required: One cylinder with double seals at the piston head and rod OR Two independent cylinders, where each cylinder is to be independently capable of holding the rated capacity for personnel lifting. Section 9 Personnel Lifting 17
2-6/13 & 2-9/25 Computer based system Computer-based system is a system of microprocessors, associated software, peripherals and interfaces. Programmable Logic Controllers (PLC), Distributed Control Systems (DCS), PC or server-based computation systems Safety level at least 2 for personnel lifting Safety level at least 1 for cargo lifting System Category I Effects of Failure Failure will not lead to dangerous situations for human safety, safety of the vessel and/or threat to the environment. II Failure could eventually lead to dangerous situations for human safety, safety of the vessel and/or threat to the environment. Computer Based system 18
Computer Based system 19
2-6/27.5 Load Radius Indicator A load-moment or load-radius indicating device for main and auxiliary hoists readable from the operator s station is to be provided, preferably with an alarm or audible device to warn the operator of a possible overload condition Cranes having different SWLs when operating in different environmental conditions are to be provided with controls to prevent or warn that the maximum hook load is exceeded, without however, overriding the operator s control of the load or crane. Not required for cranes designed for one SWL from minimum to maximum radii. Section 6/27.5 Safety Features 20
2-9/13: Emergency recovery of personnel Three different levels of redundancy in the emergency recovery control systems of cranes: PL notation The crane is to be fitted with its own independent means for controlled luff down and lowering operations in the event of a single failure in the power or control system. Such means is to provide controlled lowering and stopping of the winch drums and cylinders under all load conditions. PL+ notation The crane is to be fitted with its own independent means for controlled slew, luff down, and lowering operations in the event of a single failure in the power or control system. Such means is to provide controlled slewing of the crane and lowering and stopping of the winch drums and cylinders under all load conditions. PL++ notation The crane is to be fitted with its own independent means for performing all main functions, such as slewing, luffing up and down, hoisting up and down, folding and unfolding, telescoping in and out, etc., in the event of a single failure in the power or control system, under all load conditions. Section 9 Personnel Lifting 21
2-7: Survey Section 7 Surveys updates include: Survey requirements for slewing rings at Manufacturer Included proof load testing requirements to cover complex cranes Testing requirements for personnel lifting All safety features to be tested Personnel emergency recovery is to be demonstrated Section 7 Survey 22
ABS Guide for Certification of Lifting Appliances Download 2016 Edition of the Guide at www.eagle.org Direct link http://ww2.eagle.org/en/rules-and-resources/rules-and-guides.html Section 7 Survey 23
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