1、 RULES FOR BUILDING AND CLASSING FACILITIES ON OFFSHORE INSTALLATIONS 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
2、 and Classing Facilities on Offshore Installations 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. (See 1-1-4/3.3 of the ABS Rules for Conditions
3、of Classification Offshore Units and Structures (Part 1).) CHAPTER 3 FLOATING INSTALLATIONS SECTION 6 ELECTRICAL SYSTEMS (Revise Subsection 3-6/17, as follows:) 17 Ventilation (1 July 2017) 17.1 General i) Attention is to be given to ventilation inlet and outlet locations and air flow directions in
4、order to minimize the possibility of cross contamination. ii) Ventilation inlets are to be located in non-classified areas. iii) Ventilation for classified spaces is to be completely separate from that for non-classified spaces. iv) For engine and turbine air intakes, see 3-4/3.9. v) For emergency v
5、entilation systems shutdown, see 3-8/5.11iv)d)1). 17.3 Ventilation of Enclosed Classified Spaces i) Ventilation of enclosed classified spaces is to be made with under-pressure in relation to adjacent, less hazardous areas. ii) The arrangement of ventilation inlet and outlet openings for the enclosed
6、 classified space is to be such that the entire space is efficiently ventilated, giving special considerations to locations of equipment which may release gas, and to spaces where gas may accumulate. iii) Ventilation inlets are to be from non-classified areas. iv) Ventilation outlets are to be led t
7、o outdoor locations that are of the same or a less hazardous classification than the ventilated space. v) Ventilating fans are to be of non-sparking construction. vi) The capacity of the fan is to be such that the space is adequately ventilated, as defined by API RP 500. ABSRULES FOR BUILDING AND CL
8、ASSING FACILITIES ON OFFSHORE INSTALLATIONS .2017 1 Notice No. 1 July 2017 vii) Means are to be provided for shutdown of ventilation fans and closing external openings from outside spaces served, in the event of fire or detection of combustible or hydrogen or sulfide gas. Any enclosed classified spa
9、ces are not to have the ventilation system automatically shut down upon detection of gas inside the space. 17.5 Ventilation of Non-classified Spaces i) Ventilation inlets and outlets for non-classified spaces are to be located in non-classified areas. ii) Where passing through classified spaces, duc
10、ts are to have overpressure in relation to the classified spaces. iii) Enclosed non-hazardous working spaces opening into hazardous locations do not need to be considered hazardous, provided the arrangements required by 4-3-6/7 of the MODU Rules (6.3.1 of the 1989 IMO MODU Code) or NFPA 496 or IEC 6
11、0079-2, are complied with. iv) Means are to be provided for shutdown of ventilation fans and closing external openings from outside the spaces served, in the event of fire or detection of combustible or hydrogen or sulfide gas. 2 ABSRULES FOR BUILDING AND CLASSING FACILITIES ON OFFSHORE INSTALLATIONS .2017
