ISO 3845:2024 包括低碳能源在内的石油和天然气工业 酸性环境中评价钢管抗裂性的全环椭圆化试验方法

标准编号：ISO 3845:2024

中文名称：包括低碳能源在内的石油和天然气工业 酸性环境中评价钢管抗裂性的全环椭圆化试验方法

英文名称：Oil and gas industries including lower carbon energy — Full ring ovalization test method for the evaluation of the cracking resistance of steel line pipe in sour service

发布日期：2024-05

标准范围

本文给出了测定钢管在酸性服役中抗裂性的方法。该测试方法采用全尺寸测试样本，该样本由一小段管道（“全环”）组成，两端密封以容纳酸性测试环境。测试方法适用于任何管道；无缝、纵向焊接（有或没有填料）、螺旋焊接以及管道之间的环焊缝。注1？样品通常是管道，但也可以由法兰颈部或弯曲部分、或其他管状部件或上述组合组成。注2？该测试方法也可用于耐腐蚀合金（CRA）。该方法利用通过机械加载的椭圆化来在试样的内表面上的两个直径相对的位置处产生等于目标环向应力的周向应力。然后使测试样品单面暴露于酸性测试环境。注3？该测试还允许测量氢渗透速率。

This document gives a method for determining the resistance to cracking of steel pipes in sour service.

This test method employs a full-scale test specimen consisting of a short length of pipe (a ‘full ring’), sealed at each end to contain the sour test environment within. The test method applies to any pipe; seamless, longitudinally welded (with or without filler), helical welded, and to girth welds between pipes.

NOTE 1       The specimen is usually a pipe but can also consist of flange neck or section of a bend, or other tubular component or a combination of the above.

NOTE 2       This test method can also be used for corrosion resistant alloys (CRAs).

The method utilizes ovalization by mechanical loading to produce a circumferential stress, equal to the target hoop stress, at two diametrically opposite locations on the inside surface of the test specimen. The test specimen is then subjected to single sided exposure to the sour test environment.

NOTE 3       The test also allows measurement of hydrogen permeation rates.

标准预览图