ASTM A358 TP304/304L不锈钢管详细说明

ASTM A358  TP304/304L不锈钢管的一个标准

包括5种类别的不锈钢焊管   

1.3.1 Class 1—Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.   1类 钢管采用所有焊道填充金属的双面焊，并完全经过射线检查。  

1.3.2 Class 2—Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.   2类  钢管采用所有焊道填充金属的双面焊，不需要射线检查。  1.3.3 Class 3—Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.

3类  钢管采用所有焊道填充金属单面焊，并完全经过射线检查。  

1.3.4 Class 4—Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal (see 6.2.2.1 and 6.2.2.2).  4类 和三类相同，只是焊道暴露于钢管内壁，可能没有填加填充金属。  

1.3.5 Class 5—Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.  5类 钢管采用所有焊道金属填充的双面焊，应进行缺陷射线检测   1.4 Supplementary requirements covering provisions ranging from additional testing to formalized procedures for manufacturing practice are provided. Supplementary Requirements S1 through S6 are included as options to be specified when desired.  提供了补充要求，包括附加测试到生产实践的正规程序等条款。作为详细说明的选项，补充说明S1-S6也包括在内。  1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the ―M‖ designation of this specification is specified in the order.   本文中所述的值或以英寸磅为单位，或采用国际单位，应作为标准区分对待。在本文中，国际单位在括号内表示。各系统所表示的数值不完全相等，所以每一系统必须区别于另一系统单独使用。两个系统的数值混在一起使用会导致规范的不一致。应采用英寸磅单位，除非在顺序上指定M为首选。