本文件规定了由非合金优质钢制成的具有规定低温性能的两类圆形截面电焊钢管的交货技术条件。注1:这些管道等级旨在支持欧盟第2014\/68\/EU号指令的基本要求，该指令第13条中规定的所有相关类别下的规定低温性能的压力设备。注2:一旦本标准在《欧盟官方公报》（OJEU）上发布，符合指令2014\/68\/EU基本安全要求（ESR）的假设仅限于本标准中材料的技术数据，不假设材料适用于特定压力设备。因此，需要由压力设备的设计者或制造商根据该特定设备项目的设计要求对本材料标准中规定的技术数据进行评估，以验证是否满足压力设备指令的ESRs要求，同时考虑可能影响基材性能的后续制造工艺。

This document specifies the technical delivery conditions for two test categories of electric welded tubes of circular cross section, with specified low temperature properties, made from non-alloy quality steel. NOTE 1 These tube grades are intended to support the essential requirements of EU Directive 2014/68/EU in respect of pressure equipment with specified low temperature properties covered under all relevant Categories as set out in Article 13 of that Directive. NOTE 2 Once this standard is published in the Official Journal of the European Union (OJEU), presumption of conformity to the Essential Safety Requirements (ESR) of Directive 2014/68/EU is limited to the technical data for the materials in this standard and does not presume adequacy of the material for a specific item of pressure equipment. Consequently, the assessment of the technical data stated in this material standard against the design requirements of this specific item of equipment to verify that the ESRs of the Pressure Equipment Directive are satisfied, needs to be done by the designer or manufacturer of the pressure equipment, taking also into account the subsequent manufacturing processes which may affect properties of the base materials.