Section 5 Steam piping systems
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 12 Machinery Piping Systems - Section 5 Steam piping systems

Section 5 Steam piping systems

Parent topic: Chapter 12 Machinery Piping Systems

5.1 Provision for expansion

5.1.1 In all steam piping systems, provision is to be made for expansion and contraction to take place without unduly straining the pipes.

5.1.2 Where expansion pieces are used, particulars are to be submitted.

5.1.3 For installation requirements regarding expansion pieces, see Pt 5, Ch 11, 2.7 Provision for expansion.

5.2 Drainage

5.2.1 The slope of the pipes and the number and position of the drain valves or cocks are to be such that water can be efficiently drained from any position of the steam piping system.

5.2.2 Arrangements are to be made for ready access to the drain valves or cocks.

5.3 Pipes in way of holds

5.3.1 In general, steam pipes are not to be led through spaces which may be used for cargo, but where it is impracticable to avoid this arrangement, plans are to be submitted for consideration. The pipes are to be efficiently secured and insulated, and well protected from mechanical damage. Pipe joints are to be as few as practicable and preferably butt welded.

5.4 Pipes in dangerous area of tankers

5.4.1 The surface temperature of the steam pipes fitted on deck or in the pump room of tankers is not to exceed 220°C.

5.5 Reduced pressure lines

5.5.1 Pipelines which are situated on the low pressure side of reducing valves, and which are not designed to withstand the full pressure at the source of supply, are to be fitted with pressure gauges and with relief valves having sufficient discharge capacity to protect the piping against excessive pressure.

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