DLT441-2004《火力发电厂高温高压蒸汽管道蠕变监督规程》.pdfVIP

DL / T 441 — 2004 I ICS 27.100 F 23 备案号：13615–2004 中华人民共和国电力行业标准 DL / T 441 — 2004 代替 DL 441 — 1991 火力发电厂高温高压蒸汽管道 蠕 变 监 督 规 程 Supervision code for creep strain of steam pipe in high temperature and high pressure in fossil fuel power plant 2004-03-09 发布 2004-06-01 实施 中华人民共和国国家发展和改革委员会 发 布 DL / T 441 — 2004 II 目 次 前言··································································································································································Ⅱ 1 范围 ······························································································································································1 2 规范性引用文件 ··········································································································································1 3 蠕变测量截面的设计、装设位置及保护····································································································1 4 蠕变测量方法 ··············································································································································1 5 蠕变测点和测量标记的装设 ·······················································································································2 6 蠕变测量和计算 ··········································································································································3 7 蠕变监督的技术管理···································································································································6 附录 A（资料性附录） 常用蒸汽管道钢材的线性膨胀系数 ······································································7 DL / T 441 — 2004 III 前 言 本标准是根据原国家经济贸易委员会司（局）《关于下达 2000 年度电力行业标准制、修订计划项 目的安排》电力［2000］70 号文，对 DL441—1991 进行修订。 高温蒸汽管道蠕变监督的目的是保证管道的安全运行。通过对管道定期、定型蠕变测量和数据分 析，及时掌握高温蒸汽管道金属的蠕变规律，为正确分析和预测管道的剩余寿命提供可靠的技术依据。 DL441—1991 自颁布实施至今已 10 年有余，在实施的过程中积累了丰富的经验，也提出了一些新的 问题，同时，在新修订的 DL438—2000《火力发电