石油化工低温钢焊接.pdf

标准下载网() ICS 25 160 P 72 备案号:J400一 2004 中华人 民共和 国石油化工行业标准 SH/T3525-2004 代替SH3525一1992 石油化工低温钢焊接规程 Weldingspecificationoflowtemperaturesteel forpetrochemicalengineering 2004-10-20发布 2005-04-01实施 国家 发 展 和 改 革 委 员 会 发布 标准下载网() SH/T3525-2004 目 次 前言TIT 1 范围·I 2 规范性引用文件.·I 3 术语和定义.·2 4 总则 .·2 4.1 一般规定··································································。········································。一2 4.2 材料 ············。····················································。·············································……2 4.3 低温冲击韧性试验 ··········。···················。·································。·············。·…·… ·‘““·”‘’·5 4.4 焊接工艺评定 ························································。·········································。……6 4.5 焊 五考试 ········································。················。················。···········。··。···············……7 5 焊前准备.·7 5.1 焊接坡口·7 5.2 坡 口制备·9 5.3 组对定位 ·10 6 焊接T艺.·11 6.1 一般规定·11 6.2 预热.·12 6.3 焊接.·12 7 焊接检验 ·13 7.1 外观检验13 7.2 无损检验 .·13 7.3 焊缝返修 .·13 8 焊后热处理·13 8.1 一般规定.·13 8.2 焊后热处理工艺·14 附录A(资料性附录)国内常用低温钢板、钢管及锻件··········…·…“…·“..···························……巧 附录B (资料性附录)美国 (ASME)常用低温钢板、钢管、锻件 .·16 附录C(资料性附录)日木常用低温钢板、钢管、锻件。20 附录D(资料性附录)常用低温钢焊接材料化学成分.·22 附录E(资料性附录)AWS常用低温焊条.·25 附录F (资料性附录)AWS常用低温焊丝 9 2 用词说明············