Section 1 General

1.1.1 Unless an alternative approach for product assurance has been approved by LR (see Pt 5, Ch 1, 1.3 Alternative approach for product assurance), all items of machinery and equipment in ships built under Special Survey are to be surveyed at the manufacturer's works. The Surveyor is to be satisfied that the workmanship is of a suitable standard and that the components are suitable for the intended purpose and duty. Examples of such items are:

• Main propulsion engines including their associated gearing, flexible couplings, scavenge blowers and superchargers.
• Boilers supplying steam for propulsion or for services essential for the safety or the operation of the ship at sea, including superheaters, economisers, desuperheaters, steam heated steam generators and steam receivers. All other boilers having working pressures exceeding 0,34 MPa, and having heating surfaces greater than 4,65 m².
• Auxiliary engines which are the source of power for services essential for safety or for the operation of the ship at sea.
• Steering machinery.
• Athwartship thrust units, their prime movers and control mechanisms.
• All pumps necessary for the operation of main propulsion and essential machinery, e.g. boiler feed, cooling water circulating, condensate extraction, fuel oil and lubricating oil pumps.
• All heat exchangers necessary for the operation of main propulsion and essential machinery, e.g. air, water and lubricating oil coolers, fuel oil and feed water heaters, de-aerators and condensers, evaporators and distiller units.
• Air compressors, air receivers and other pressure vessels necessary for the operation of main propulsion and essential machinery. Any other unfired pressure vessels for which plans are required to be submitted as detailed in Pt 5, Ch 11, 1.6 Plans.
• All pumps essential for safety of the ship, e.g. fire, bilge and ballast pumps.
• Valves and other components intended for installation in pressure piping systems having working pressures exceeding 0,7 MPa.
• Alarm and control equipment as detailed in Pt 6, Ch 1 Control Engineering Systems.
• Electrical equipment and electrical propelling machinery as detailed in Pt 6, Ch 2 Electrical Engineering.

1.2.1 The Surveyors are to examine and test the materials and workmanship from the commencement of work until the final test of the machinery under full power working conditions. Any defects, etc. are to be indicated as early as possible. On completion, the Surveyors will submit a report and if this is found to be satisfactory by the Committee a certificate will be granted and an appropriate notation will be assigned in accordance with Pt 1, Ch 2 Classification Regulations.

1.3.1 LR will be prepared to give consideration to the adoption of an approach for product assurance, utilising regular and systematic audits of an organisations’s arrangements for assuring product quality as an alternative to the direct survey of individual items.

1.3.2 Alternative approaches for product assurance are to be approved by LR. In order to obtain approval, the requirements of Pt 5, Ch 1, 6 Quality Assurance Scheme for Machinery or the Rules for the Manufacture, Testing and Certification of Materials, July 2022, Ch 1, 2.4 Materials Quality Scheme are to be complied with. Proposals for equivalent approaches are to be submitted for consideration.

1.3.3 Where manufacturers are approved by LR under an alternative approach for product assurance (e.g. QAM, MQS, PVS), the intervention arrangements agreed under the scheme shall ensure that the relevant Rule requirements and corresponding certification requirements are met.

1.4.1 Any proposal to deviate from the requirements of the Rules will be specially considered.