1、 RULES FOR BUILDING AND CLASSING STEEL VESSELS 2017 NOTICE NO. 1 JULY 2017 The following Rule Changes were approved by the ABS Rules Committee on 30 May 2017 and become EFFECTIVE AS OF 1 JULY 2017. (See http:/www.eagle.org for the consolidated version of the Rules for Building and Classing Steel Ves
2、sels 2017, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction, unless otherwise noted. (See 1-1-4/3.3.) PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HUL
3、L STRUCTURES AND ARRANGEMENTS SECTION 14 RUDDERS AND STEERING EQUIPMENT 17 Double Plate Rudder (Revise Paragraph 3-2-14/17.1 and add new 3-2-14/Figures 5, 6, and 7, as follows:) 17.1 Strength (1 July 2017) Rudder section modulus and web area are to be such that stresses indicated in the following Su
4、bparagraphs are not exceeded. In calculating the section modulus of the rudder, the effective width of side plating is to be taken as not greater than twice the athwartship dimension of the rudder. Bolted cover plates on access openings to pintles are not to be considered effective in determining th
5、e section modulus of the rudder. In order for a cover plate to be considered effective, it is to be closed using a full penetration weld and confirmed suitable by non-destructive testing method. Generous radii are to be provided at abrupt changes in section where there are stress concentrations, inc
6、luding in way of openings and cover plates. When inspection windows are located in the panel below the rudder hub, the stress is to be as permitted in way of cutouts. Moments, shear forces and reaction forces are to be obtained by direct calculation, which is to be submitted. Guidance for calculatio
7、n of these values is given in Appendix 3-2-A5. For spade rudders and rudders with horns, the section modulus at the bottom of the rudder is not to be less than one-third the required section modulus of the rudder at the top of the rudder or at the center of the lowest pintle. Special attention is to
8、 be paid in design and construction of rudders with slender foil sections in the vicinity of their trailing edge (e.g., hollow foil sections, fishtail foil sections). Where the width of the rudder blade at the aftermost vertical diaphragm, w, is equal or less than 1/6of the trailing edge length meas
9、ured between the diaphragm and the trailing edge, , finite element vibration analysis of the rudder blade is also to be submitted for review. See 3-2-14/Figure 5. ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 1 Notice No. 1 July 2017 FIGURE 5 (1 July 2017) wSpade rudders with an embedded ru
10、dder trunk are to have a trailing edge with dimensions that satisfy the following requirements: i) For a rudder trailing edge having a monotonous transition to a rounded end with a finite thickness or diameter (see 3-2-14/Figure 6), the vortex shedding frequency calculated using the equation given b
11、elow is to be higher than 35 Hz. fs= TDUSTDt +where fs= vortex shedding frequency, in Hz U = flow velocity, in m/s (ft/s), which is taken as vessels design speed with vessel running ahead at the maximum continuous rated shaft rpm and at the summer load waterline St= nominal Strouhal number = 0.18 D=
12、 0.27 C = minimal chord length of rudder cross section profile, in m (ft) D = nominal boundary layer thickness at trailing edge = 0.01C T= 0.77 T = thickness or diameter of rounded end, in m (ft) FIGURE 6 (1 July 2017) Thickness or Diameter of Rounded End2 ABSRULES FOR BUILDING AND CLASSING STEEL VE
13、SSELS .2017 Notice No. 1 July 2017 ii) For a rudder trailing edge with a flat insert plate (see 3-2-14/Figure 7), the insert plate thickness, t0, is to be no larger than 1.5Vdin mm, where Vdis the design speed in ahead condition, in knots, as defined in 3-2-14/3.1. The extension beyond the weld to r
14、udder plate, , is to satisfy the following 3-2-14/Figure 7 and with consideration of possible local vibratory bending of the insert plate. FIGURE 7 (1 July 2017) Insert Plate Thicknesst0Rudder Plate Thicknesst1 (t0+ 2t1)Alternatively, a vibration analysis is to be carried out to confirm that the nat
15、ural frequency of the rudder is to be at least 20% away from the vortex shedding frequency preferably determined using either a detailed numerical analysis method such as CFD or testing for ballast and full draft at 85% and 100% Vdas defined in 3-2-14/3.1. (Renumber existing 3-2-14/Figures 5 through
16、 11 as 3-2-14/Figures 8 through 14.) (Revise Subparagraph 3-2-14/17.1.2, as follows:) 17.1.2 In way of Cutouts Allowable stresses for determining the rudder strength in way of cutouts (see 3-2-14/Figure 8) are as follows: Bending stress b= K/Q N/mm2(kgf/mm2, psi) Shear stress = K/Q N/mm2(kgf/mm2, ps
17、i) Equivalent stress e= 223 +b= Ke/Q N/mm2(kgf/mm2, psi) where SI units MKS units US units K75 7.65 10,900 K50 5.1 7,300 Ke100 10.2 14,500 Q = 1.0 for ordinary strength hull steel = as defined in 3-2-1/5.5 for higher strength steel plate ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 3 Notic
18、e No. 1 July 2017 FIGURE 8 Z6r26r16r1r26r2XNote:r1= corner radius of rudder plate in way ofportable bolted inspection holer2= corner radius of rudder plateIn way ofcutoutsr1PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 5 EQUIPMENT SECTION 1 ANCHORING, MOORING, AND TOWING EQUIPMENT (Revise Subsectio
19、n 3-5-1/1, as follows:) 1 General (1 July 2017) All vessels are to have a complete equipment of anchors and chains. The letter placed after the symbols of classification in the Record, thus: A1 , will signify that the equipment of the vessel is in compliance with the requirements of the Rules, or wi
20、th requirements corresponding to the service limitation noted in the vessels classification, which have been specially approved for the particular service. The mass per anchor of bower anchors, given in 3-5-1/Table 1, is for anchors of equal mass. The mass of individual anchors may vary 7% plus or m
21、inus from the tabular mass, provided that the combined mass of all anchors is not less than that required for anchors of equal mass. The total length of chain required to be carried onboard, as given in 3-5-1/Table 1, is to be reasonably divided between the two bower anchors. For tankers and bulk ca
22、rriers that anchor outside a harbor or similar area of sheltered waters, the ABS Guide for the Optional Class Notation Deep Water Anchoring for Oil Tankers and Bulk Carriers, with the optional notation DWA, enables owners, operators, and designers to assess the adequacy of anchoring equipment in the
23、se locations. (Following text remains unchanged.) 4 ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 Notice No. 1 July 2017 PART 4 VESSEL SYSTEMS AND MACHINERY CHAPTER 2 PRIME MOVERS SECTION 1 DIESEL ENGINES 13 Testing, Inspection and Certification of Diesel Engines 13.9 Shop Tests of Internal
24、 Combustion, I.C. Engines (1 July 2016) 13.9.2 Engines Driving Propellers or Impellers Only (Revise Item 4-2-1/13.9.2iv), as follows:) iv) (1 July 2017) 90% (or normal continuous cruise power), 75%, 50% and 25% of rated power, in accordance with the nominal propeller curve (the sequence to be select
25、ed by the engine manufacturer). (Revise 4-2-1/Table 1, as follows:) TABLE 1 Required Material and Nondestructive Tests of Diesel Engine Parts(1)(1 July 2017) Engine Part Material Properties (2)Nondestructive Tests for which purpose, plans and data as required by 4-2-2/1.5 are to be submitted to ABS
26、for approval, showing compliance with the requirements of this Section. A unit of the same type is to be satisfactorily containment and type tested, as required by 4-2-2/5.3 and 5.7. ii) Turbochargers of category C are to be surveyed during its construction for compliance with the design approved, a
27、long with, but not limited to, material tests, hydrostatic tests, dynamic balancing, performance tests, etc., as indicated in 4-2-2/11.1, all to be carried out to the satisfaction of the Surveyor. iii) Each turbocharger required to be certified by 4-2-2/1.1 is to be delivered with certificates indic
28、ating compliance with the requirements of this section and the applicable type approval. 11.3.2 Approval Under the Type Approval Program 11.3.2(a) Product Design Assessment. Upon application by the manufacturer, each model of a type of turbocharger is to be design assessed as described in 1-1-A3/5.1
29、. For this purpose, each design of a turbocharger type is to be approved in accordance with 4-2-2/11.3.1i). Turbochargers so approved may be applied to ABS for listing on the ABS website as Products Design Assessed. Once listed, and subject to renewal and updating of the certificate as required by 1
30、-1-A3/5.7, turbocharger particulars will not be required to be submitted to ABS each time the turbocharger is proposed for use on board a vessel. 11.3.2(b) Manufacturing Assessment for Turbochargers. A manufacturer of turbochargers, who operates a quality assurance system in the manufacturing facili
31、ties, may apply to ABS for quality assurance assessment described in 1-1-A3/5.3.1(a) (Manufacturers Procedure), 1-1-A3/5.3.1(b) (RQS) or 1-1-A3/5.5 (PQA (IACS UR Z26 Alternative Certification Scheme). Upon satisfactory assessment under 1-1-A3/5.5 (PQA), turbochargers produced in those facilities wil
32、l not require a Surveyors attendance at the tests and inspections indicated in 4-2-2/11.3.1ii). Such tests and inspections are to be carried out by the manufacturer whose quality control documents will be accepted. Certification of each turbocharger will be based on verification of approval of the d
33、esign and on continued effectiveness of the quality assurance system. See 1-1-A3/5.7.1(a). 10 ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 Notice No. 1 July 2017 Audits under PQA are to include: Chemical composition of material for the rotating parts Mechanical properties of the material o
34、f a representative specimen for the rotating parts and the casing UT and crack detection of rotating parts Dimensional inspection of rotating parts Rotor balancing Hydrostatic pressure testing Overspeed testing. 11.3.2(c) Type Approval Program. Turbocharger types which have their designs approved in
35、 accordance with 4-2-2/11.3.2(a) and the quality assurance system of their manufacturing facilities approved in accordance with 4-2-2/11.3.2(b) will be deemed Type Approved and will be eligible for listing on the ABS website as Type Approved Product. PART 4 VESSEL SYSTEMS AND MACHINERY CHAPTER 3 PRO
36、PULSION AND MANEUVERING MACHINERY SECTION 4 STEERING GEARS 13 Control Systems 13.1 General (1 July 2011) (Add new Subparagraph 4-3-4/13.1.9, as follows:) 13.1.9 System Response Under Failure (1 July 2017) The failures (as listed, but not limited to those items in 4-3-4/Table 1) likely to cause uncon
37、trolled movements of rudder are to be clearly identified. In the event of detection of such failure, the rudder should stop in the current position. Alternatively, the rudder may be set to return to the midship/neutral position. Failure Mode and Effect Analysis methodology may be used to identify th
38、e failures. ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 11 Notice No. 1 July 2017 (Revise 4-3-4/Table 1, as follows:) TABLE 1 Steering Gear Instrumentation (1 July 2017) Monitored Parameters Display/Alarm Location a) Rudder angle indicator (1)Display Navigation bridge Steering gear compar
39、tment b) Power unit motor running Display Navigation bridge Engine room control station c) Power unit power supply failure Alarm Navigation bridge Engine room control station d) Power unit motor overload (2)Alarm Navigation bridge Engine room control station e) Power unit motor phase failure (2), (3
40、)Alarm Navigation bridge Engine room control station f) Control power failure Alarm Navigation bridge Engine room control station g) (1 July 2017) Hydraulic oil reservoir low level (2)Alarm Navigation bridge Engine room control station h) Hydraulic lock (4)Alarm Navigation bridge i) Auto-pilot runni
41、ng (5)Display Navigation bridge j) Auto-pilot failure (5)Alarm Navigation bridge k) Steering mode (autopilot/manual) indication Display Navigation bridge l) Automatic autopilot (5)override failure Alarm Navigation bridge m) Automatic autopilot (5)override activated Alarm Navigation bridge n) (1 July
42、 2011) Loop failures (6)Alarm Navigation bridge o) (1 July 2011) Computer-based system failures (7)Alarm Navigation bridge p) (1 July 2017) Earth fault on AC and DC circuits Alarm Navigation bridge q) (1 July 2017) Deviation between rudder order and feedback Alarm Navigation bridge (Notes remain unc
43、hanged.) 12 ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2017 Notice No. 1 July 2017 PART 4 VESSEL SYSTEMS AND MACHINERY CHAPTER 3 PROPULSION AND MANEUVERING MACHINERY SECTION 5 THRUSTERS 1 General (Revise Paragraph 4-3-5/1.1, as follows:) 1.1 Application (1 July 2017) The provisions of this se
44、ction apply to maneuvering thrusters not intended to assist in propulsion, and to azimuthal and non-azimuthal thrusters (and to alternative propulsion and steering systems without a rudder, as applicable) intended for propulsion, maneuvering or dynamic positioning, or a combination of these duties.
45、Maneuvering thrusters intended to assist maneuvering and dynamic positioning thrusters, where fitted, may, at the request of the owners, be certified in accordance with the provisions of this section. In such cases, appropriate class notations, as indicated in 4-3-5/1.3, will be assigned upon verifi
46、cation of compliance with corresponding provisions of this section. Thrusters intended for propulsion with or without combined duties for assisting in maneuvering or dynamic positioning are to comply with appropriate provisions of this section in association with other relevant provisions of Part 4,
47、 Chapter 3. Thruster types not provided for in this section, such as cycloidal propellers, pump or water-jet type thrusters, will be considered, based on the manufacturers submittal on design and engineering analyses. Thrusters are to be constructed with sufficient strength, capacity and the necessa
48、ry supporting systems to provide reliable propulsion and steering to the vessel in all operating conditions. Special consideration will be given to the suitability of any essential component which is not duplicated. For a vessel fitted with multiple steering systems, each steering system is to be so
49、 arranged that the failure of one of them will not render the other one inoperative. Each of the steering systems is equipped with its own dedicated steering gear, provided that each of the steering systems is fulfilling the requirements for main steering gear (as given in 4-3-5/5.12.1) and each of the steering systems is provided with an additional function for positioning and locking the failed steering system in a neutral position after a failure of its own power unit(s) and actu
