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1.4.3 Piping and equipment in connection with hydrocarbon storage (including product piping, inert gas system, gas freeing and venting system and crude oil washing system) are addressed in the DNVGL-RU-SHIP Pt.5 Ch.5. The additional requirements to class III piping in this standard shall be applied. 1.4.4 Reference to DNVGL-RU-SHIP Pt.5 Ch.5 is conditioned that there is no coinciding production and tank inspection. For units subject to in-service inspection of the cargo system during production, additional requirements are given in DNVGL-OS-A101 Ch.2 Sec.7 or DNVGL-OS-A101 Ch.2 Sec.8 as applicable. Guidance note: Some systems used for typical tank ship applications, (e.g. cargo piping, ballast systems, firewater systems), should be especially considered, for example with respect to fabrication quality and support arrangement, when evaluated for use on offshore installations in view of differing operational conditions and overall safety and maintenance philosophy. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e--- 1.4.5 Interpretations This standard has been based on internationally accepted principal requirements, defined in the normative references as listed in [2]. In cases where these a) contain only functional requirements, b) allow alternative solutions to prescriptive requirements or c) are generally or vaguely worded, a DNVGL interpretation has been added. 1.4.6 The interpretations are not aiming at introducing additional requirements but at achieving uniform application of the principal requirements. The interpretations can be regarded as norms for fulfilling the principle requirements. 1.4.7 The interpretations do not preclude the use of other alternative solutions. Such solutions shall be documented and approved for compliance to the principal requirement equivalent to the original interpretation. 1.4.8 Classification For use of this standard as technical basis for offshore classification as well as description of principles, procedures, and applicable class notations related to classification services, see Ch.3. 1.4.9 Governing regulations Alternative designs and arrangements deviating from the different regulatory standards as adapted in this standard (e.g. MODU code requirements) may be specially considered. For use of this standard to document compliance to the MODU code certificate, these deviations require acceptance of the flag administration. 1.4.10 The requirements of this standard are in compliance with relevant parts of the IMO MODU Code 2009. Note that for compliance with statutory requirements, later amendments may be applicable. 1.4.11 The standard has been written for general world-wide application. Governmental regulations may include requirements in excess of the provisions by this standard depending on the size, type, location and intended service of the offshore unit or installation. 1.5 Structure This standard is divided into three chapters: — Ch.1 General introduction, scope, definitions and references Offshore standards, DNVGL-OS-D101. Edition January 2018 Marine and machinery systems and equipment Page 8 DNV GL AS Chapter 1 Section 1PDF Image | Marine and machinery systems and equipment 2018
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