Kajinos A version in any other language made by translation under the responsibility of a CEN member into its own and notified to the CEN Management Centre has the same status as the official versions. The maximum accumulated length of such individual imperfections in any mm or 12 T of weld length, whichever is the smaller, shall not exceed 12,0 mm, where the separation between individual inclusions is less than 4 T. Complete removal of defects shall be verified by local visual inspection, aided where necessary by suitable NDT methods. Method of test at ambient temperature EN Pipes of requirement class B. The purchaser shall specify the required type of inspection document 3.
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Technical delivery conditions. Pipes of requirement class B BS EN is the European standard that specifies the technical delivery conditions for seamless and welded steel pipes for the on land transport of combustible fluids primarily in gas supply systems but excluding pipeline applications in the petroleum and natural gas industries.
It includes more stringent quality and testing requirements than those in BS EN Steel pipes for pipeline transportation systems within the petroleum and natural gas industries are covered by ISO BS EN specifies products with the same and additional strength levels and partly similar but not identical requirements as EN and EN and is with two additional annexes specifying deviating or additional requirements also published as API Spec 5L.
BS EN does not apply to cast steel pipe. It was the intention, when preparing this document, to avoid specifying the quality of line pipe to be used for a particular application. However, it was recognized that there are several quality levels commonly used, and it was decided to reflect these in the standard by the differentiation between two quality levels. Firstly, the need was recognized to provide a basic quality level. Secondly, many purchasers impose requirements additional to the basic standard, for instance concerning toughness and non-destructive inspection.
This approach is common, for example, for transmission pipelines. ISO The Charpy impact energy requirements in this document have been derived from established data, in accordance with EPRG recommendations, and are intended to prevent the occurrence of long running shear fracture in pipelines transporting clean, dry natural gas.
It is the responsibility of the designer to decide whether these energy requirements suffice for the intended application. For example, rich gas or two-phase fluids may require additional testing to be carried out.
For pipes of requirement class B, a weld efficiency factor of 1,0 can be used in design calculations, due to the conditions specified for the manufacture of the pipes and for the testing of the tubes. The selection of the requirement class depends on many factors: the properties of the fluid to be conveyed, the service conditions, design code and any statutory requirements should all be taken into consideration. BS EN gives no detailed guidelines. It is the ultimate responsibility of the user to select the appropriate requirement class for the intended application.
This document combines a wide range of product types, dimensions and technical restrictions in accordance with the functional requirements for gas supply systems referred to in BS EN Gas supply systems. Pipelines for maximum operating pressure over 16 bar. Functional requirements.
DIN EN 10208-2:1996-08
Warmbreitband für die Herstellung von Großrohren