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发表于 2014-8-9 10:01:37
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HEAD PURCHASE SPECIFICATION
封 头 采 购 技 术 条 件
Job No.: TH-Q-002-2012
工作令号：TH-Q-002-2012
0 First issue
REV DESCRIPTION PREPARED BY REVIEWED BY APPROVED BY
一、General总则
Purchase specification shall conform to the clauses in ASME Code Sec. VIII Div. 1 2010 ED and 2011 AD.
采购技术条件符合ASME锅炉与压力容器规范第VIII卷第1分册2010版及2011版增补相应条款。
二、Requirement要求
1、The heads shall be standard 2:1 ellipsoidal. Drawing No. 618006-1002-01-00-11 will be provided to the vendor together with this purchase specification.
封头是2：1标准椭圆形封头。图纸618006-1002-01-00-11与本采购技术条件一起提供给供方。
2、 Material: SA-516M Gr.485 will be provided by ZheJiang Tian Hang Steam Turbine Auxiliary Equipment Co.,Ltd.
封头材料SA-516M Gr.485将由浙江天杭汽轮辅机有限公司提供。
3、The heads shall be cold formed. After cold forming, heads may not be heat treated.
封头应采用冷成型，成型后可不做热处理。
4、The identification markings of heads shall be protected.
应注意保护封头识别标记。
三、The content of test检验内容
The quantity of heads封头的数量：one left head and one right head左、右封头各一件
Standard and dimensions: refer to 618006-1002-01-00-11 Rev.0
规格及尺寸：见图618006-1002-01-00-11 Rev.0
1、The inner surface of the head shall not deviate outside of the specified shape by more than 15mm nor inside the specified shape by more than 7.5mm and the sample plates shall be vertical with the testing surface when they are tested.
封头内表面与样板的偏差向外凸不得大于15mm，向内凹不得大于7.5mm，检查时应使样板垂直于待测表面。
2、The difference of the maximal and minimum inside diameter of the head shirt shall in no case be more than 12mm.
封头直边最大与最小内径之差不超过12mm。
3、The thickness of heads after forming shall in no case be less than 9mm.
封头成形厚度不应小于9mm。
四、Certification合格证
The certification of heads shall be supplied in accordance with the clauses in ASME Code Sect. VIII Div. 1 2010 ED and 2011 Ad and shall indicate whether or not the head has been heat treated.
按ASME锅炉与压力容器规范第VIII卷第1分册2010版及2011版增补相应条款提供封头合格证,必须注明在封头成形后有无热处理。
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