Section 5 Welded pressure pipes
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 1 General Requirements - Chapter 4 Requirements for Fusion Welding of Pressure Vessels and Piping - Section 5 Welded pressure pipes

Section 5 Welded pressure pipes

Parent topic: Chapter 4 Requirements for Fusion Welding of Pressure Vessels and Piping

5.1 General

5.1.1 Fabrication of pipework is to be carried out in accordance with the requirements of Ch 13, 5 Specific requirements for pressure piping of the Rules for Materials.

5.2 Welding workmanship

5.2.1 Preheating is to be effected by a method which ensures uniformity of temperature at the joint. The method of heating and the means adopted for temperature control are to be to the satisfaction of the Surveyors.

5.2.2 All welding is to be performed in accordance with the approved welding procedures by welders who are qualified for the materials, joint types and welding processes employed.

5.2.3 Welding without filler metal is generally not permitted for welding of duplex stainless steel materials.

5.2.4 All welds in high pressure and high temperature pipelines are to have a smooth surface finish and even contour; if necessary, they are to be made smooth by grinding.

5.2.5 Check tests of the quality of the welding are to be carried out periodically at the discretion of the Surveyors.

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