Author: V.K. Shurpyak
Abstract
The article provides comparative analysis of the requirements of classification societies, industry standards and standards of foreign shipyards for permissible technological parameters characterizing the change in the shape of the pipe at bending. Comparison of the requirements of industry standards for bending with the values of allowance for thinning as a result of bending in strength calculations shows a significant discrepancy in the requirements of regulatory documents. Based on the analysis, it has been concluded that it is necessary to harmonize the requirements for the allowable values of pipe wall thinning and develop the Register requirements for the allowable values of ovality and the size of corrugations after pipe bending.
Keywords: ship pipelines, pipe bending technology, strength calculations of pipelines.
References
1. Rules for the Classification and Construction of Sea-Going Ships. Part VIII. Systems and Piping, Russian Maritime Register of Shipping, 2020. (In Russian)
2. International Association of Classification Societies. IACS UR P1. Rules for pipes Rev.5 Nov 2001. — Electronic Edition of IACS Resolutions, 2021.
3. International Code for Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code).
4. International Code for the Construction and Equipment of Ships carrying Dangerous Chemicals in Bulk (IBC Code).
5. DNV-GL Rules for Classification. Ships Part 4 Ch. 6 Piping systems, Edition July 2020.
6. ABS Rules for Building and Classing Steel Vessels. Part 4, Ch. 6, Sec.2, 2015.
7. ASME B31.1 Code for Power Piping.
8. Rules for Technical Supervision during Construction of Ships and Manufacture of Materials and Products for Ships. Part VI. Technical supervision during the manufacture of products. Russian Maritime Register of Shipping, 2020. (In Russian)
9. OST 5.95057-90 Ship systems and systems of ship power plants. Typical technological process for the manufacture and installation of pipelines. — L., 1990, 207 p. (In Russian)
About author:
V.K. Shurpyak - PhD, FAI "Russian Maritime Register of Shipping", St. Petersburg, e-mail: shurpyak.vk@rs-class.org
Issue: 66/67 (2022)
For citation: V.K. Shurpyak. Comparison of various standards requirements for pipe bending parameters for ship pipelines. Research Bulletin by Russian Maritime Register of Shipping. 2022, No. 66/67, pp. 86-91.
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