Section 7 Cast iron
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 15 Piping Systems and Pressure Plant - Chapter 1 Piping Design Requirements - Section 7 Cast iron

Section 7 Cast iron

Parent topic: Chapter 1 Piping Design Requirements

7.1 General

7.1.1 Grey cast iron valves and fittings will, in general, be accepted in Class III piping systems except as stated in Pt 15, Ch 1, 7.1 General 7.1.5. Grey cast iron valves and fittings may be accepted in the Class II steam systems referred to in Table 1.3.1 Maximum pressure and temperature conditions for Class II and III piping systems but the design pressure or temperature is not to exceed 13 bar or 220oC, respectively.

7.1.2 Spheroidal or nodular graphite iron castings for valves and fittings in Class II and Class III piping systems are to be made in a grade having a specified minimum elongation not less than 12 per cent on a gauge length of , where S o is the actual cross-sectional area of the test piece.

7.1.3 Proposals for the use of this material in Class I piping systems will be specially considered, but in no case is the material to be used in systems where the design temperature exceeds 350oC.

7.1.4 Where the elongation is less than the minimum required by 7.1.2, the material is, in general, to be subject to the same limitations as grey cast iron.

7.1.5 Grey cast iron is not to be used for the following:

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